MCCB with undervoltage release — 100 A, 3-pole
The Siemens SENTRON 3VA2010-6HN36-0CA0 is a 3-pole molded case circuit breaker rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C, meaning no derating needed in a warm enclosure. It carries a 242 kA interrupting capacity at 240 V and 187 kA at 415 V, so it handles high-fault scenarios typical of industrial mains distribution without cascading upstream. The built-in undervoltage release (UVR) drops the breaker on loss of control voltage — standard for safety circuits where a machine must trip if the control supply fails.
Line protection design — what the ratings mean for fit
Rated insulation voltage is 800 V, so this breaker is suitable for 690 V line-to-line systems where the insulation must hold under transient conditions. The 100 A rating is flat across 40–70 °C — unusual for an MCCB, and a practical advantage when the breaker sits near heat-producing components in a panel. The interrupting ratings step down with voltage: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V. At 690 V the 3 kA figure is low, so verify the available fault current at that voltage level before specifying.
DIN-rail integration and panel fit
The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail enclosures. The 86 mm depth leaves clearance behind a 120 mm deep gland plate for wiring and the undervoltage release connections. No communication module or ground-fault monitoring on this variant, so the wiring stays simple: line in, load out, UVR coil wires to the control circuit.