The SENTRON 3VA1112-3EF36-0HC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection in distribution panels. It carries 125 A continuously at 40 °C, with the full thermal rating holding through 50 °C before a gentle derate begins — 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, 114 A at 70 °C. That means it can feed a 125 A bus in a warm enclosure without losing headroom.
Breaking capacity and selectivity
The interrupting ratings cover the common industrial voltages: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. At 415 V three-phase — the standard for many European and Asian plants — a 52.5 kA SCCR gives solid fault isolation without cascading upstream. The 800 V rated insulation voltage confirms the internal clearance is sized for 690 V distribution.
Auxiliaries and release configuration
This variant ships with a shunt trip (STL) release and 2 HQ auxiliary switches built in. The shunt trip allows remote tripping from a safety relay or emergency-stop circuit, while the HQ aux contacts report breaker position back to a PLC or status lamp. No undervoltage release, no ground-fault module, no communication function — it is a straightforward line-protection MCCB with remote trip capability.
Physical fit and panel integration
The breaker measures 130 mm high, 76.2 mm wide, 70 mm deep — a 3-pole MCCB footprint that drops into standard SENTRON panel-mounting cutouts. The 70 mm depth keeps it within typical enclosure depth limits for wall-mounted distribution boards.