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Terminal blocks
Terminal blocks are the deepest-documented family in the components catalogue: 24 models, each with a full product record covering materials, conductor ranges, UL ratings and IEC ratings. That depth is why this family anchors the components line — a buyer can shortlist real models remotely instead of trading emails for basic ratings.
The 24-model range
Terminal block models and pitches from the product records (supplier model codes as listed)
| Catalogue model | Supplier model | Pitch |
|---|---|---|
| 128R-A | TL206R (M3) | 5.00 mm |
| 128V-A | TL206V (M3) | 5.00 mm |
| 128V-B | TL414V | 7.50 mm |
| 300R-A | TL200R | 5.00 mm |
| 300R-B | TL400R | 7.50 mm |
| 300V-A | TL200V | 5.00 mm |
| 300V-B | TL400V | 7.50 mm |
| 301R-A | TL201R | 5.00 mm |
| 301R-B | TL301R | 5.08 mm |
| 301V-A | TL201V | 5.00 mm |
| 301V-B | TL301V | 5.08 mm |
| 302R | TL004R | 3.50 mm |
| 302V | TL003V | 3.50 mm |
| 303R | TL104R | 3.81 mm |
| 303V | TL103V | 3.81 mm |
| 304R-A | TL206R (M3) | 5.00 mm |
| 304R-B | TL206R (M3) | 5.00 mm |
| 304V-A | TL208V | 5.00 mm |
| 304V-B | TL308V | 5.08 mm |
| 305A | TL202V | 5.00 mm |
| 305B | TL400V | 7.50 mm |
| 306A | TL203V | 5.00 mm |
| 307 | TL202V | 5.00 mm |
| 705R | TL201R | 5.00 mm |
Worked example: 128R-A in full
The 128R-A record shows the documentation standard. It is a rising-clamp PCB terminal block in PA66 UL94 V-0, single level at 5.00 mm pitch, accepting solid conductors of 0.2–4.0 mm² and stranded conductors of 0.2–2.5 mm² (UL wire range AWG 24–12). The M3 screw tightens at 0.4 N·m (2-pole) or 0.5 N·m (3-pole and above), with a stripping length of 5.8–6.2 mm. UL ratings are 300 V with 20 A in group B and 10 A in group D; IEC ratings include 320 V (III/2), 24 A (III/2) and a 4 kV rated impulse voltage. Operating temperature runs from −40 °C to +105 °C.
| 128R-A type | Rising-clamp PCB terminal block, single level |
|---|---|
| Insulating material | PA66, UL94 V-0 |
| Conductor range | Solid 0.2–4.0 mm²; stranded 0.2–2.5 mm²; UL AWG 24–12 |
| UL rating | 300 V; 20 A (B) / 10 A (D) |
| IEC rating | 320 V (III/2); 24 A (III/2); impulse 4 kV |
| Operating temperature | −40 °C to +105 °C |
Shortlisting by pitch
Pitch is the first filter: 3.50 mm and 3.81 mm models serve compact boards; 5.00 mm and 5.08 mm are the general-purpose heartland (17 of the 24 models); 7.50 mm models take the higher-power end. The R/V suffixes and A/B variants distinguish clamp and format options within each pitch family — name your pitch, conductor range and rating target in the enquiry and the matching records will be pulled in full. The companion blog post, DIN rail terminal blocks: types, ratings & selection, explains how to read the rating tables.
Are full datasheets available?
Each model has a complete record of the kind shown for the 128R-A; request the full table for your shortlisted models with your enquiry.
Can terminal blocks be supplied with our logo?
The OEM/ODM record covers simulating terminal blocks or connectors with or without logo — ask when you enquire.
From shortlist to sample
Terminal blocks are a sample-driven purchase: the record narrows the field, the hand confirms it. The working sequence is to shortlist by pitch and rating from the 24-model range, request the full records for the shortlist, and put samples through the termination your line will actually use — your ferrules, your torque driver, your operators. Blocks that look identical in a table separate quickly in the hand: clamp feel, wire entry forgiveness, marking clarity. Only then does the volume conversation start, and by then it is a conversation about one qualified model rather than a category. The range's structure supports this: the 5.00/5.08 mm heartland covers most general work, so most shortlists are two or three models long.