ZB4BW051

This Schneider Electric ZB4BW051 is a complete body/contact assembly and light block designed for use within the Harmony XB4 series. It features a single Normally Open (NO) slow-break contact, suitable for standard applications.

The light block utilizes an incandescent bulb with a BA 9s base and is supplied via an integral transformer rated for 6V and 1.2 VA. The unit is designed to operate at a rated supply voltage of 400V AC at 50 Hz.

Connection to the device is made via screw clamp terminals, accommodating cable sizes up to 2 x 1.5 mm² with cable end or 1 x 0.22 mm² without. The assembly has a width of 30 mm and a height of 47 mm, with a net weight of 0.141 kg. The mechanical durability is rated for 5,000,000 cycles, and the contacts are made of a silver alloy (Ag/Ni).

Electrical specifications include a conventional free air thermal current of 10A, a rated insulation voltage of 600V, and a rated impulse withstand voltage of 6kV. The rated operational current varies depending on the voltage and load type, with examples including 6A at 120V AC-15 and 0.55A at 125V DC-13. Electrical reliability is high, with values of less than 10exp(-6) at 5V/1mA and less than 10exp(-8) at 17V/5mA in clean environments.