The Siemens 3VA1116-6EF32-0DH0 is a SENTRON molded case circuit breaker (MCCB) rated for 160 A continuous at 40 °C ambient, with 3 poles and a line-protection design. Its interrupting capacity hits 220 kA at 240 V AC and 154 kA at 415 V AC — numbers that tell you it handles high-fault-current scenarios like transformer secondaries or large bus feeds without cascading upstream. The 800 V rated insulation voltage gives headroom for 690 V systems.
Thermal derating and real-world current
The 160 A rating holds steady up to 50 °C ambient. Above that it steps down: 158 A at 55 °C, 155 A at 60 °C, 153 A at 65 °C, and 150 A at 70 °C. If your panel runs hot — say a sealed enclosure near a furnace line — you need to account for that 10 A drop from the nameplate. The breaker dissipates 40.5 W max at full load, so ventilation matters in a tight cabinet.
Auxiliary and undervoltage release configuration
This unit ships with an undervoltage release (UVR) integrated — the design-of-auxiliary-release field confirms it. That means if your control voltage drops below the release threshold, the breaker trips, which is standard for emergency-stop or safety circuits that need a predictable power-loss response. The auxiliary switch block carries 2 auxiliary switches plus 1 trip alarm switch HQ, giving you status feedback for a PLC or annunciator. The basic switch module is order code 3VA11166EF320AA0 — useful if you ever need to swap the base unit and keep the aux block.
Physical fit and panel integration
Dimensions: 70 mm deep, 76.2 mm wide, 130 mm tall. That 3-inch width is standard for a 3-pole MCCB in a SENTRON panelboard or DIN-rail adapter. The depth of 70 mm means it clears most 200 mm deep enclosures with room for wiring gutters. Mounting is via the standard SENTRON base plate or DIN rail adapter — no special bracket needed.