Key ratings and what they mean for fit
The Siemens 3VA2010-5JQ42-0AA0 is a 4-pole SENTRON molded case circuit breaker rated for 100 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed up to 70 °C, which simplifies panel layout in warm enclosures or near other heat sources. Its ETU560 electronic trip unit enables adjustable N-conductor protection (OFF, 20% to 100%) and ground-fault monitoring via summation current formation on L + N — critical for selective coordination on 4-wire systems where neutral protection must match the phase breaker setting. Breaking capacity ranges from 187 kA at 240 V AC down to 3 kA at 690 V AC; at 415 V and 440 V it holds 121 kA, giving headroom for high-fault installations like industrial substations or large motor control centers.
Panel integration and compliance
Dimensions of 86 mm depth, 140 mm width, and 181 mm height fit standard 4-pole MCCB panel cutouts — verify gland plate clearance for the 86 mm depth, especially in shallow enclosures. Rated insulation voltage 800 V, operating voltage up to 690 V AC, IP40 on the front face — suitable for indoor panel mounting where splash protection is not required. Maximum power loss 13.5 W; operating temperature range -25 °C to 70 °C, storage -40 °C to 80 °C. Communication function integrated.