The ZB4BZ103 is a complete body and contact assembly from the Harmony XB4 range, designed for use with 22mm push button operators. It incorporates a single block with two normally open (2 NO) slow-break contacts made of a silver alloy (Ag/Ni) and provides connections via screw clamp terminals. This assembly has a rated insulation voltage of 600V, a conventional free air thermal current of 10A, and a high mechanical durability of 5,000,000 cycles. It is designed for reliable operation in an ambient temperature range of -40 to 70°C. Its robust construction with a Zamak fixing collar makes it suitable for standard industrial control panel applications requiring durable switching components.