The Siemens SENTRON 3VA2110-7MS32-0DL0 is a three-pole molded case circuit breaker (MCCB) rated for 100 A continuous current at 40 °C, built for starter protection duty. Its interrupting capacity hits 330 kA at 240 VAC and 242 kA at 415 VAC — figures that place it in the high-fault tier for industrial distribution, not a panelboard general-purpose breaker.
Key ratings and what they mean for fit
The 100 A frame holds its rating across 40–50 °C without derating; at 70 °C it still carries 90 A. That thermal curve matters when the breaker sits in a crowded enclosure next to drives or transformers that raise ambient temperature. Breaking capacity of 330 kA at 240 V and 242 kA at 415 V means this MCCB can safely interrupt faults at those levels without upstream fuses or a current-limiting reactor — a key spec for high-fault installations like transformer secondaries or large motor control centers. Rated insulation voltage Ui of 800 V gives headroom for 690 V systems, where the breaker still clears 52.5 kA. That 690 V rating is what lets it serve European 690 V drive inputs or mining equipment.
Starter protection and release design
This is a starter-protection version, meaning the ETU310M electronic trip unit is tuned for motor-starting inrush — it rides through the 6–8x FLA spike during acceleration without nuisance tripping, then clears a locked-rotor fault fast enough to protect the contactor and cable. An undervoltage release (UVR) is built in, so the breaker drops out on a sag or loss of control voltage. That's standard for safety circuits where a motor must not auto-restart after a power dip. Auxiliary contact block carries two auxiliary switches plus a trip alarm and an electrical alarm switch — enough for remote status and fault annunciation back to a PLC or DCS.
Physical fit and panel integration
Dimensions are 105 mm wide, 181 mm tall, 86 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without re-drilling. The 86 mm depth is shallow enough for 200 mm deep cabinets. Maximum power dissipation is 75 W at full load. In a sealed enclosure that heat needs to be factored into the thermal budget — don't crowd it against other high-dissipation gear without ventilation or derating.