Siemens SENTRON 3VA1010-3ED42-0CA0 — 100 A, 4-Pole MCCB with Undervoltage Release
The Siemens SENTRON 3VA1010-3ED42-0CA0 is a 4-pole molded case circuit breaker (MCCB) rated 100 A at 40 °C, designed for line protection in distribution panels and industrial switchboards. It carries a 75.6 kA interrupting capacity at 240 V and 52.5 kA at 415 V, giving solid fault-clearing headroom for most low-voltage commercial and light industrial services. The integrated undervoltage release (UVR) trips the breaker when control voltage drops, which is useful for motor branch circuits that need to prevent automatic restart after a power loss.
What the Ratings Mean for Fit
The 100 A rating holds across 40 °C to 50 °C without derating; at 55 °C it drops to 98 A, at 60 °C to 96 A, and at 70 °C to 91 A. If the breaker sits in a warm enclosure or near other heat sources, the thermal curve matters for continuous load sizing. The TM210 overcurrent release combines a thermal-magnetic trip: the thermal element handles overloads, the magnetic element handles short-circuits. The 800 V rated insulation voltage means the breaker is suitable for 480/277 V and 600/347 V systems with margin. The 27.5 W maximum power loss is the heat the breaker dissipates at full rated current — factor that into enclosure ventilation if you're packing multiple breakers in a small panel.
Panel Integration Notes
The breaker measures 130 mm high, 101.6 mm wide, and 70 mm deep. It mounts on a DIN rail or can be screw-fixed to a backplate. The 4-pole design (three phases plus neutral) is common for three-phase four-wire systems. The undervoltage release requires a separate control voltage — verify the coil rating matches your control circuit before wiring. No communication function or ground-fault monitoring is built in; those are separate accessory modules if needed.