ZS4-S 4 mm² Screw Clamp Terminal Block, for conductors with a diameter of 4 mm² and 10 AWG, with a 5.2 mm spacing. The product has an easy disconnect operation with the disconnect blade operated by hand or with a screwdriver, and has the same profile as the ZS4 feed-through terminal block for aligned marking and identical end section use.
The ZS4-S screw clamp terminal block from ABB provides a compact 4 mm² (10 AWG) connection solution with a hand‑operated disconnect blade. It shares the same profile as the ZS4 feed‑through block, allowing aligned marking and interchangeable end sections.
Key specifications include a rated voltage of 400 V (IEC) / 150 V (UL), a rated current of 25 A, IP20 protection, and a maximum short‑time withstand current of 480 A. The device is qualified for a wide temperature range (‑5 °C to +40 °C installation) and has passed extensive climatic and vibration tests. A range of accessories such as end stops, shield connectors, and tools are available to complete the installation.
| Rated voltage | 400 V (IEC) / 150 V (UL) |
|---|---|
| Rated current | 25 A |
| Short‑time withstand current (1 s low) | 480 A |
| Maximum dissipated power | 0.8 W |
| Operating temperature range (installation) | -5 °C to +40 °C |
| IP protection | IP20 |
| Rated cross‑section | 4 mm² (10 AWG) |
| Screw torque | 0.6 Nm (5.31 Ib·in) |
The ZS4‑S is rated for 400 V according to IEC 60947‑1 and 150 V according to UL 1059.
The terminal block can carry a continuous current of 25 A as specified in IEC 60947‑7‑1.
Accessories include end stops, end sections, circuit separators, shield connectors, protecting covers, cover kits, tools, and terminal block markers.