The best terminal blocks, compared.
Top pick: HSEAMALL 12-way barrier sets Best value: Blackspur BB-CT110 3 A and 15 A – About £3.60 is the lowest shelf price with at least 1,000 reviews. The score keeps the deduction for stripped screws and cracked housings. Updated October 2026.
A terminal block on amazon.co.uk is not one product. In this aisle it is a cuttable screw strip, often called a choc block, a barrier strip with jumpers, or a lever splice filed under the same name. You are usually joining lighting flex, or busing low-voltage wires on a hobby layout. The current on the piece has to match the connector in the bag, and the screw or spring has to hold after a tug. Titles often list several amp ratings while the specification cell names only one. A bullet that runs from 3 A to 60 A does not mean the strip in your hand carries 60 A. A 3 A strip is not a socket-ring joint. Stars run from 3.9 to 4.8 where a review line exists. Nothing was laboratory tested, and a CE cell is not a BS 7671 declaration. The [terminal block buying guide](/hub/diy-supplies/terminal-block/sub/terminal-block-buying-guide) sets current, conductor and enclosure before price.
A terminal block on amazon.co.uk is not one product. In this aisle it is a cuttable screw strip, often called a choc block, a barrier strip with jumpers, or a lever splice filed under the same name.
42 products checked · 58 hrs invested · +21,400 readers
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Personal buying guide
Question 1 of 2
What are you joining?
The HSEAMALL listing is five 12-way barrier sets with red and black jumpers at £11.99, and the current cell says 15 A. Across 817 amazon.co.uk reviews at 4.8, the UK texts are mostly model-railway bus bars. In the first 50, complaints include missing covers, a brittle case that snapped, and one wrong-size strip. The voltage cell says 400 V and 600 V, and the title puts 600 V on the strip and 400 V on the jumpers. The bullet says one screw hole at each end and that the jumpers can be cut. The weight cell says 350 g. Those railway reviews do not show the strip on a 230 V ring final, and a snapped case is a reason to reject that set rather than tape it.
Pros
Cons
Best for: A jumpered bus on a model railway or similar low-demand distribution, if you check the covers.
Less suitable: A 230 V ring final, or a case you would repair with tape.
Specifications
Common questions
What current and voltage are printed?
The current cell says 15 A. The voltage cell says 400 V and 600 V. The title puts 600 V on the strip and 400 V on the jumpers.
How are the strips mounted?
The bullet says one screw hole at each end. The connector cell is Screw. The bullet says the jumpers can be cut.
What do UK reviews mostly describe?
Model-railway bus bars. In the first 50 texts, complaints include missing covers, a brittle case that snapped, and one wrong-size strip.
The second SDFIXINGS listing is two 12-way strips at £3.92, and the current cell says 5 A rather than 3 A. The amazon.co.uk line is 4.7 from 50 reviews, and all 12 stored texts are from the UK. Those texts call the screws precise and mention garden lights and light-duty wiring, and they do not describe a stripped screw or a split body. The bullets, the image URL, part number A58 and the rank line match the 3 A ASIN, including a spring-clamp line the connector cell does not support. The voltage cell says 300 V. No IP cell is printed, so a garden-light review is not an outdoor rating. Treat the 5 A cell as the only current this row adds, and do not add the 50 reviews to the 314 on the sibling.
Pros
Cons
Best for: Light-duty wiring where you can read a 5 A cell and you will not treat the photo as unique.
Less suitable: Anyone adding these 50 reviews to the 3 A file, or fitting the strip outdoors.
Specifications
Common questions
How does this differ from the 3 A SDFIXINGS listing?
The current cell says 5 A and the title ends in Pack 2, 5A. The bullets, image URL, part number A58 and rank line match ASIN B0D2PB529B.
What do the UK reviews say?
All 12 texts are from the UK. They call the screws precise and mention garden lights and light-duty wiring. They do not describe a stripped screw or a split body.
Is an outdoor rating printed?
No IP cell is printed. The voltage cell says 300 V and the specification-met cell says CE.
The flintronic lever splices are £7.98, with a title that says 34 pieces and a unit-count cell that says 50. Across 6,474 amazon.co.uk reviews at 4.6, the first 50 texts praise the speed on ceiling fans and lights, and they also say some levers snap off and that a wire can pull out unless you tug it. The maximum-voltage cell says 250 V. There is no current cell, and a 32 A figure appears only in a review, so it is not a listing rating. The title says 18–22 AWG, a bullet says solid 0.2–4 mm² and soft 0.08–2.5 mm², and the wire-diameter cell says 0.08 mm. The rank cell sits in Electrical Terminals & Kits, not Terminal Blocks. The review file is the largest in this set, and the grip is still something you check with a tug before you close the rose.
Pros
Cons
Best for: Clip-together splices in a ceiling rose, if you tug every wire and you do not need a printed amp rating.
Less suitable: A buried joint, or anyone treating a reviewer’s 32 A remark as the listing rating.
Specifications
Common questions
How many connectors are in the pack?
The title and a bullet say 34. The unit-count cell says 50.0 and the number-of-items cell says 1. The colour cell says 34PCS Grey.
What conductor size is printed?
The title says 18–22 AWG. A bullet says solid 0.2–4 mm² and soft 0.08–2.5 mm². The wire-diameter cell says 0.08 mm. There is no current cell. The maximum-voltage cell says 250 V.
What do UK reviews say about the levers?
The first 50 texts praise the speed on ceiling fans and lights. They also say some levers snap off and that a wire can pull out unless you tug it.
The GTSE pack is four white screw strips at £7.99, and the package line is two 3 A strips and two 15 A strips, while the current cell names only 15 A. Across 1,304 amazon.co.uk reviews at 4.6, UK texts say the strips do the job and can be cut, and one says the screw heads on the small connectors were not formed properly. The voltage cell says 400 V, the body is polyethylene, and the bullet names galvanised steel screws and brass inserts from −15 °C to +80 °C. Contacts, poles and positions are 12, and the item count is 4, so the 12 is the ways on a strip rather than the number of strips. At this price it is the largest screw-strip review file that still prints both a 3 A pack line and a 15 A cell. You still have to read which strip you have cut off, because the cell alone does not describe the 3 A pieces in the same bag.
Pros
Cons
Best for: A household screw-strip kit when you will separate the 3 A pieces from the 15 A pieces before you fit them.
Less suitable: A tight rose that needs a lever, or a single current you can read from the cell alone.
Specifications
Common questions
Is every strip 15 A?
The package line is two 3 A strips and two 15 A strips. The current cell says 15 A only. Contacts, poles and positions are 12, and the item count is 4.
What voltage and material are printed?
The voltage cell says 400 V. The material cell says polyethylene. The bullet names captive screws in galvanised steel and brass inserts, from −15 °C to +80 °C.
What do UK reviews say about the screws?
In the first 50 UK texts, many say the strips do the job and can be cut. One says the screw heads on the small connectors were not formed properly.
The Brackit set is clear screw strips at £6.41, and a bullet says one each of 3 A, 5 A, 10 A and 15 A, while the included-components cell says three strips per size. Across 608 amazon.co.uk reviews at 4.6, most of the first 50 UK texts praise the selection for light fittings. One says the 10 A and 5 A pieces look almost the same, and another says the screws are awkward. The current cell says 15 A and the voltage cell says 600 V. The connector cell says Screw, and a bullet also says tool-free. Contacts and the unit count are 144, and the number-of-items cell is 4. The size range is why people buy it, and you still have to tell the lookalike 5 A and 10 A pieces apart before they go into a fitting.
Pros
Cons
Best for: Light fittings when you want several amp sizes in one clear-strip pack and you will count the pieces.
Less suitable: A buyer who needs the box count to match the bullet, or a lever in a tight rose.
Specifications
Common questions
How many strips are in the box?
A bullet says one each of 3 A, 5 A, 10 A and 15 A. The included-components cell says three strips per size. The number-of-items cell is 4. Contacts and the unit count are 144.
What do the current and voltage cells say?
The current cell says 15 A. The voltage cell says 600 V. The connector cell says Screw, while a bullet also says tool-free.
What do reviews say about the sizes?
Most of the first 50 UK texts praise the selection for light fittings. One says the 10 A and 5 A pieces look almost the same. Another says the screws are awkward.
The SDFIXINGS 12-way strip, at £3.86 for two pieces, is the listing whose current cell says 3 A, while the shared bullets also run through 5 A, 15 A, 30 A and 60 A. Across 314 amazon.co.uk reviews at 4.6, UK texts say the strip splits into single connectors and is small enough to sit behind a socket. The connector cell says Screw, and a bullet says spring clamp, so the clamp type is not settled by the page. One review says screws were missing and the rest stripped on the first turn. The voltage cell says 300 V, the body is polycarbonate, and the weight cell says 30 g. The image URL and part A58 match the 5 A ASIN, so those two files are not independent photographs. A 3 A cell is the figure to plan around, and a stripped screw is the reason to stop and use another piece.
Pros
Cons
Best for: A small 3 A screw joint behind a socket, if you ignore the 60 A bullet and check every screw.
Less suitable: A ring final, or any job that needs the spring clamp the bullet mentions.
Specifications
Common questions
What current does this listing state?
The current cell says 3 A. The shared bullets also list 3 A, 5 A, 15 A, 30 A or 60 A, and 300 V / 10 A. The connector cell says Screw, while a bullet says spring clamp.
Do the screws need a tool?
Yes. The connector cell is Screw. UK reviews describe tightening screws. One review says screws were missing and the rest stripped on the first turn.
Can you cut this strip?
The bullets do not say so. UK reviews say it splits into single connectors and is small enough to fit behind a socket.
The ZFYQ set is 35 orange lever splices at £5.99: 15 two-port, 15 three-port and 5 five-port, with a voltage cell of 250 V and no current cell. The bullet states solid and stranded conductors from 0.08 to 2.5 mm² and flexible conductors from 0.08 to 4 mm², and it says the splice locks without tools. Across 220 amazon.co.uk reviews at 4.6, six of the first 50 texts are from the UK, and those six mention ceiling lights and a ceiling fan in a tight space without stating a fault. The contacts, poles and positions cells are all 35, which copies the piece count rather than a circuit rating. A temperature-range cell is printed as 1.5E+2 °C, so that figure is not a usable limit. The 250 V cell and the millimetre range are the lines you can check; the missing amp cell is the line you cannot.
Pros
Cons
Best for: A tight ceiling rose when you need a printed millimetre range and can accept a missing amp cell.
Less suitable: A job that needs a marked current, or a joint you intend to bury.
Specifications
Common questions
What is in the pack?
The title says 35 pieces: 15 two-port, 15 three-port and 5 five-port. The voltage cell says 250 V. There is no current cell.
Which conductor sizes does the listing state?
The bullet says solid and stranded 0.08 to 2.5 mm², and flexible 0.08 to 4 mm². It also says the splice locks without tools.
What do UK reviews use them for?
Six of the first 50 texts are from the UK. They mention ceiling lights and a ceiling fan in a tight space. Those six texts do not state a fault.
The JZK pack is barrier strips with red and black combs at £6.99, and the bullet lists two each of the 4-, 5- and 6-position blocks TB-1504, TB-1505 and TB-1506. The current cell says 15 A. The title prints 600 V / 400 V and the voltage cell says 400 V, so the cell is the single figure. Across 21 amazon.co.uk reviews at 4.6, one UK text says very good, a Canada text describes 24 V AC from a furnace, and a Netherlands text says it does what it should, and none of those three states a fault. The unit count is 6 and the number-of-items cell is 5. The cover is stated as not flame retardant. One UK sentence is not a house-wiring record, and the combs are the reason this row exists.
Pros
Cons
Best for: A small barrier block with link combs, if one UK sentence is enough evidence for you.
Less suitable: House wiring you would justify from a large UK review file.
Specifications
Common questions
What is in the JZK pack?
The bullet lists two each of TB-1504, TB-1505 and TB-1506, with red and black combs. The unit count is 6.0 and the number-of-items cell is 5.
Which voltage should you read?
The title says 600 V / 400 V. The voltage cell says 400 V. The current cell says 15 A.
How many UK reviews are in the file?
One UK text says very good. A Canada text describes 24 V AC from a furnace. A Netherlands text says it does what it should. None states a fault.
The Blackspur BB-CT110 is £3.60, and the bullet says two 3 A strips and two 15 A strips in polyethylene, while the current cell says 15 A only. Across 1,043 amazon.co.uk reviews at 4.5, the first 50 UK texts say the price is low and the strips can be cut. The same sample says screws strip or spin, housings crack, and several parcels arrived as loose strips rather than on the header card. No voltage cell is printed. Contacts are 8, poles are 2 and positions are 248, which does not describe one strip. The colour cell says black, and the material cell says polyethylene. The £3.60 is the low price beside a four-figure review count, and a cracked housing is a piece you replace rather than tighten again.
Pros
Cons
Best for: A low-priced 3 A and 15 A mix when you will bin any piece whose screw spins or whose body cracks.
Less suitable: A joint that has to hold what the 15 A bullet suggests, or a fitting you cannot reopen.
Specifications
Common questions
What is in the Blackspur set?
The bullet says two strips of 3 A and two strips of 15 A, in polyethylene. The current cell says 15 A. Contacts are 8, poles are 2 and positions are 248.
Is a voltage printed?
No voltage cell is printed. There is no specification-met cell and no country cell. The colour cell says black.
What do UK reviews repeat?
In the first 50 UK texts, the price is low and the strips can be cut. Screws strip or spin, housings crack, and several parcels arrived loose rather than on the header card.
The XINXINGDINGSHENG pair is two 12-way screw strips at £3.19, the lowest price in this set, and the current cell and the title say 30 A. There is no voltage cell, and the specification-met cell says Energy Rating, which does not name an electrical standard. Across 19 amazon.co.uk reviews at 4.1, all 7 stored texts are from the UK. Some say they are cheap and do the job. Others say the brass splits, the plastic shreds and exposes metal, and that they would not put 30 A through them. The bullet says you can cut the strip with scissors or a knife, and it also says both tool-free and tighten the screws. The £3.19 buys the strip, and the split brass is the reason the printed 30 A is not a current you should plan to use.
Pros
Cons
Best for: A spare strip only if you will not load it to the printed 30 A and you can return split brass.
Less suitable: Any joint you would size from the 30 A cell, or a listing you need a voltage from.
Specifications
Common questions
What current is printed?
The current cell and the title say 30 A. There is no voltage cell. The specification-met cell says Energy Rating.
Can the strip be cut?
The bullet says yes, with scissors or a knife. It also says you tighten the screws. The connector cell is Screw.
What do the UK reviews report?
All 7 texts are from the UK. Some say they are cheap and do the job. Others say the brass splits, the plastic shreds and exposes metal, and that they would not put 30 A through them.
The LTMMC listing is six screw strips at £4.99, and the bullet says two each of 3 A, 5 A and 10 A, while the current cell says 10 A. The amazon.co.uk line is 3.9 from 30 reviews, the lowest stars in this set, and all 10 stored texts are from the UK. Those texts say the screws cross-thread and the blocks twist in the case, and one buyer paid £6.45 to return a faulty unit. No voltage cell is printed. Contacts are 5 while poles and positions are 12, and the included-components cell says NO against a bullet that says six pieces. The material cell says nylon, and a bullet says the strip is about 10 mm. The mixed amp bullet is the useful part of the page, and the cross-threaded screws are why the 3.9 is not a rounding error.
Pros
Cons
Best for: Only if you need the 3 A, 5 A and 10 A mix and you will reject any screw that cross-threads.
Less suitable: A joint you cannot easily revisit, or a listing you need a voltage cell from.
Specifications
Common questions
Which amp ratings are in the pack?
The bullet says two each of 3 A, 5 A and 10 A, with 12 channels. The current cell says 10 A. Contacts are 5, while poles and positions are 12.
Is a voltage printed?
No voltage cell is printed. The material cell says nylon. The specification-met cell says CE. The included-components cell says NO.
What goes wrong in the reviews?
All 10 texts are from the UK. Screws cross-thread and the blocks twist in the case. One buyer paid £6.45 to return a faulty unit.
The Funver listing is a white 12-way strip at £4.99, and the title says a 5-pack at 30 A while the included-components cell says 3 pieces and the number-of-items cell is 3. The current cell says 30 A. A bullet says 400 V, and there is no voltage cell. The connector cell says Through Hole, while the bullet describes a screw choc block in polyethylene with brass. The weight cell says 30 g. No customer-reviews line and no review texts are in the capture, so there is no star rating and no UK complaint or praise to weigh. The gauge cell says 33 with no unit. At £4.99 you are buying a count and a clamp type the page does not agree with itself about.
Pros
Cons
Best for: Nobody in this set, until a later capture adds a star line and an agreed piece count.
Less suitable: Any joint you would choose from reviews, or a 30 A load you would take from an unreviewed page.
Specifications
Common questions
How many strips does the listing claim?
The title says a 5-pack. The unit count is 5.0. The included-components cell says 3 pieces and the number-of-items cell is 3.
What current and voltage are stated?
The current cell says 30 A. A bullet says 400 V. There is no voltage cell. The connector cell says Through Hole, while the bullet describes a screw choc block.
Are there reviews on this capture?
No customer-reviews line and no review texts are in the file, so this capture has no star rating and no review count to quote.
For this comparison we scored twelve amazon.co.uk terminal-block listings checked on 16 October 2026. A terminal block here may be a cuttable screw strip, a barrier strip with jumpers, or a lever splice. The score uses the star line, review volume, whether the listing agrees with itself, stored UK review texts, and the shelf price in GBP. Deductions cover multi-amp bullets, stripped screws, split brass, cracked bodies, levers that snap, a shared image, a single UK text, and a missing review line. There was no laboratory joint test. A CE cell is not a BS EN 60998 declaration.
Amazon stars
35%The amazon.co.uk star average is scaled to a 35-point cap. No star line scores 0. The star line is not the editorial total.
Review volume
25%5,000 or more reviews score 25. Bands then step down through 700, 250, 50 and 20 reviews. Under 20 reviews scores 2, and no reviews score 0.
Listing clarity
20%Points for one current figure, one voltage figure, one consistent mm² range, a connector cell that matches the bullets, and a pack count that matches the title. A clash scores less, or zero on that part.
UK review sample
10%Stored UK texts that describe a job score up to 6. A further 4 applies when that sample does not repeat stripped screws, split brass, cracked bodies, cross-threads or snapped levers.
Price
10%The shelf price is scored against the review count. A large file under £4 scores higher than a dearer pack. A missing current cell reduces the price points.
Start with the type, then the current on the piece you will actually fit, then the conductor, then where the joint will sit. Price is last. A screw strip, a barrier strip and a lever splice can share a search term and still be the wrong part. Read the specification cell rather than a title that lists 3 A through 60 A. One conductor per hole unless the maker says otherwise. No pack here prints an IP rating. UK mains are 230 V, and you prove the circuit is dead before you open a rose.
A terminal block in this UK aisle is a cuttable screw strip, often called a choc block, a barrier strip with jumpers, or a lever splice that amazon.co.uk files under the same name. Shoppers use them to join lighting flex or to bus low-voltage hobby wires. They are not the same product, and a title that says terminal block does not tell you which family is in the bag. Screw choc strips are most of this set, and you cut them between ways.
A title that lists 3 A through 60 A is not the rating of one strip. Read the current cell for the piece in the bag. A 3 A strip is not a ring-final joint.
Put one conductor in each hole unless the maker says otherwise. Overtightening until the brass splits is a reason to replace the piece, not to tighten it again.
HSE says not to repair a cable with tape or an unsuitable connector. No listing here prints an IP rating. Work around a bath or shower can be notifiable in England.
The first cut is the family. A screw strip you cut, a barrier strip with link combs, and a lever splice are not interchangeable, even when amazon.co.uk files them all as terminal blocks. Screw strips here are SDFIXINGS, GTSE, LTMMC, Brackit, Blackspur, XINXINGDINGSHENG and Funver. Barrier strips are JZK and HSEAMALL. Lever splices are ZFYQ and flintronic. Use the current cell for the piece in the bag, not every number in a shared bullet.
The strip is not the enclosure. No listing in this set prints an IP rating, so outdoor use is not supported, and a garden-light review is not an outdoor rating. Work around a bath or shower can be notifiable in England even when the same repair in a bedroom is not. These products are not a junction box, and they are not a joint you bury. UK review texts matter because the same faults repeat. Stripped screws come up on SDFIXINGS, LTMMC, the small GTSE pieces and Blackspur.
Three typical situations, each with a recommendation from this comparison.
You are replacing a connector on an existing light, outside a bathroom zone, and you will separate the pieces before you fit them. The GTSE pack states two 3 A strips and two 15 A strips, with 4.6 from 1,304 reviews, at about £7.99. The current cell names only 15 A. One review found a poor screw head on the small connectors.
You want jumpers for a low-voltage hobby bus, not a 230 V ring final. HSEAMALL is five 12-way barrier sets at about £11.99, with a 15 A cell and 4.8 from 817 reviews. The UK texts are mostly model-railway bus bars, and the sample includes a snapped case and missing covers.
You want the lowest shelf price in this set that still has at least 1,000 reviews, and you will bin a piece whose screw spins or whose body cracks. Blackspur BB-CT110 is about £3.60, with 4.5 from 1,043 reviews. The bullet names two 3 A and two 15 A strips. No voltage cell is printed.
The top pick is the GTSE pack: four white screw strips at about £7.99, package line two 3 A and two 15 A, 4.6 from 1,304 reviews, and a 400 V cell. The current cell still says 15 A only, and one review found a poor screw head on the small connectors. The best value is Blackspur BB-CT110 at about £3.60, with 4.5 from 1,043 reviews, the lowest shelf price here with at least 1,000 reviews. The score keeps the deduction for stripped screws and cracked housings. The cheaper XINXINGDINGSHENG pair has split brass and 19 reviews. None of this is a laboratory test or a BS 7671 approval.
Blackspur BB-CT110 3 A and 15 A
About £3.60 is the lowest shelf price with at least 1,000 reviews. The score keeps the deduction for stripped screws and cracked housings.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources on electrical safety and household connecting devices. Listings checked 16 October 2026. Prices on amazon.co.uk move.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Scores compare published listings and review texts. They are not a laboratory test.
