The Siemens 3VA1110-6EF36-0CH0 is a SENTRON molded case circuit breaker (MCCB) for line protection, rated 100 A continuously at 40 °C with a 3-pole configuration. Its interrupting capacity hits 220 kA at 240 V, dropping to 154 kA at 415 V and 121 kA at 440 V — numbers that give real selectivity headroom in a high-fault panel. The 70 mm depth (2.76 in) and 76.2 mm width (3 in) slot into standard SENTRON mounting footprints, so swapping in a panel that already holds 3VA breakers is a straight drop.
Ratings and what they mean on site
The 100 A rating holds flat from 40 °C through 50 °C — no derating needed for a warm panel in summer. At 55 °C it drops to 98 A, and at 70 °C it's still at 91 A, which is better than many MCCBs that shed 20 % by that point. The insulation voltage is rated 800 V, so it's comfortable on 480 V or 600 V class systems without creeping into a higher frame size. Interrupting capacity at 690 V is still 17 kA — same as at 500 V — which means it handles a 690 V motor feeder fault without upstream fuses needing to clear first. The 220 kA at 240 V is the headline number, but for most industrial panels the 154 kA at 415 V is the one that matters for coordination studies.
Built-in auxiliaries and releases
This MCCB ships with an undervoltage release (UVR) and a 2-auxiliary-switch plus 1-trip-alarm-switch HQ configuration. The UVR means the breaker drops out if control voltage falls below a threshold — standard for emergency-stop circuits and safety isolation where you want the breaker to open on loss of control power. The trip indicator (a red flag on the front) tells a technician at a glance whether it tripped on fault or was manually opened, which saves troubleshooting time on a line-down call.