Terminal Blocks

Enicstra stocks DIN-rail terminal blocks used to terminate, distribute, and disconnect wiring in industrial control cabinets. Inventory covers feed-through (single-level pass-through), multi-level (2-tier, 3-tier), ground/earth, disconnect (sliding link, knife switch), fuse-holder, motor-starter-style, and sensor/actuator terminals across screw, push-in spring (cage clamp), and tension-clamp terminations.

Brands carried include Phoenix Contact UT and PT series, Weidmüller A-series and SAK, Wago TopJob S 2002/2004 and 2055 series, Allen-Bradley 1492-J, Entrelec, Klippon, and Eaton XB. Obsolete terminal blocks — discontinued Phoenix Contact UK first generations, retired Wago 280-series, end-of-life Entrelec — are sourced through our supplier network. Each block is inspected for terminal integrity and ships with a 12-month functional warranty.

For obsolete terminal blocks, send the OEM part number for a quote within 1–2 business days.

Subcategories

DIN Rail and Channel

DIN rail, wire duct, slotted channel, and panel-building mounting hardware for industrial cabinets.

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Specialized

Specialized and hard-to-categorize industrial automation parts — quote requests welcome.

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Terminal Blocks

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Buying guide

Choosing Terminal Blocks components

Terminal block selection is mostly about termination style, current rating, and the marking and jumper-bar system that ties the block to the rest of the panel-building standard. A terminal block alone is just half the system; the marking strips, end stops, end plates, and jumpers complete it.

Specs to confirm before ordering:

Termination style: screw (traditional, widely accepted), push-in spring/cage clamp (faster install, vibration-resistant), tension-clamp, IDC (low-current sensor wiring)
Number of levels: single (feed-through), 2-tier, 3-tier, or sensor/actuator triple-level
Conductor cross-section range — typically 0.14–4 mm² for control wiring, 0.5–10 mm² for power, higher for power distribution blocks
Rated current per pole
Rated voltage
Color — typically gray for general use, blue for neutral, yellow-green for ground, red for fused circuits
Special functions: disconnect (sliding link), fuse holder, knife disconnect, isolation, sensor power distribution
Jumper bar compatibility and accessory marking strips
UL, CSA approvals for the installation jurisdiction

Common gotchas: mixing Phoenix Contact UT and Wago 2002 terminal blocks on the same DIN rail works mechanically but jumper bars are brand-specific — a Phoenix jumper does not fit a Wago block. Push-in spring terminals require either ferrules on stranded wire or solid wire; bare stranded wire pushed in is unreliable and creates intermittent connections. Multi-level terminal blocks are space-efficient but make troubleshooting harder because each level is a separate circuit visually overlapping with the others. Ground terminals (yellow-green) need positive bonding to the rail; using a regular feed-through terminal as a ground is non-compliant in most installations.

Typical applications: incoming AC feed termination, DC distribution, sensor/actuator field wiring termination, fused branch circuits, and disconnect of individual circuits during commissioning or troubleshooting. On legacy panels, matching the existing terminal block family preserves jumper-bar and marking-strip compatibility.

For obsolete terminal blocks, send the OEM part number for a sourcing quote.

Related categories Frequently asked questions

Do you stock obsolete terminal blocks?

Yes. Discontinued Phoenix Contact UK first generations, retired Wago 280-series, end-of-life Entrelec, and earlier Allen-Bradley 1492-J codes are sourced through our supplier network.

Screw vs. push-in spring — which is better?

Push-in spring (cage clamp, Wago TopJob, Phoenix Contact PT) is faster to terminate, vibration-resistant, and does not require re-torquing. Screw terminals are familiar to field electricians and meet existing standards in many installations. Mix only if a single panel uses both consistently per section.

Can I mix terminal block brands on one rail?

Mechanically yes — all use 35 mm DIN rail. But jumper bars and marking strips are brand-specific, and end plates and end stops may need to match the dominant family on each rail. For new builds, standardize on one brand per panel.

Do I need ferrules on stranded wire?

For push-in spring terminals, yes — ferrules give the wire a defined geometry the spring can grip reliably. For traditional screw terminals, ferrules are optional but improve durability and prevent wire-strand spreading.

Are marking strips included?

Generally no — marking strips, end plates, end stops, and jumper bars are sold separately. We can quote a coordinated kit if you send the terminal block part number and the quantity of each accessory needed.

What is the warranty?

12-month functional warranty. Damage from over-torquing screw terminals, insufficient strain relief, or operating outside the rated current/voltage is not covered.