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Material, explained

Terminal block.

Also written DIN rail terminal, Screw terminal, Connection block.

What is a terminal block?

A terminal block is the small clamp that joins wires inside a panel without a joint you cannot undo. Blocks snap side by side onto the standard 35 mm rail, and each holds its wire under a screw or a spring clamp. Screw terminals suit rework; spring clamps resist vibration and need no torque check. Size the block to the conductor cross section.

Defined by IEC 60947-7-1, which covers terminal blocks for copper conductors, published by IEC.

Surge Protection Module - 2 Pole, a Terminal block part supplied by Data Systems
Terminal block in the catalogue: Surge Protection Module - 2 Pole, DS-ICS-V2-1452-SURGE-PROTECTION-MODULE-2-POLE. Catalogue photograph.

Published by Data Systems, network material suppliers in Secunderabad, Hyderabad since 1984, which is forty years of experience with these parts. Written from the standards named above. Last checked 2026-08-14. How we check this, and what we got wrong.

Data Systems, a network material supplier in Secunderabad, Hyderabad since 1984 with branches in Vijayawada and Visakhapatnam, supplies Terminal block across India through official channels. Send a list, get one quote.

Terminal Block / Panel Accessory

Where it is used

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