Active Production — No Obsolescence Risk
The GS1VB4: It is the fuse switch disconnector body from the TeSys GS range, accepting BS-type D1 fuses — the fuses themselves are ordered separately.
Rated 1250 A — What That Means for Fit
The conventional free air thermal current (Ith) is 1250 A at 40 °C, and the rated operational current reaches 1000 A at 400 V in AC-23B duty — this is the figure that governs motor switching or distribution feeder applications. Breaking capacity is 10 kA at 400 V AC-23B, with a making capacity of 8 kA at the same voltage — these numbers define the fault-clearing capability and must coordinate with upstream protection. Rated operational power reaches 600 kW at 690 V AC-23A/B, so the body handles high-power loads when paired with the correct BS fuses.
Panel Integration and Installation
Mounts on a plate or rail — the 14.3 x 25.2 x 13.0 in footprint (363 x 641 x 330 mm) needs a generous enclosure backplate; plan for cable entry and bending radius on the 185 mm² flexible conductors the terminals accept. Power circuit screw terminals accept up to 185 mm² flexible cable, and the tightening torque is 44 N.m — a torque wrench is required for installation. IP20 with the terminal cover fitted means finger-safe but not washdown; this is an indoor panel component, not a field-mounted enclosure.
Standards and Compliance
Designed to IEC 60947-3 (switch-disconnector), IEC 60269-1 and IEC 60269-2 (fuse coordination) — the standards that govern isolation and fuse protection in industrial power circuits. Rated insulation voltage 1000 V AC, impulse withstand 12 kV — confirms insulation coordination for 400 V and 690 V systems with adequate margin. Fire resistance tested to IEC 60695-2-1: body at 960 °C, fuse cover at 850 °C — glow-wire compliance for equipment in fire-risk environments.