Siemens 3VA2010-5JQ32-0AA0 — 100 A MCCB with ETU560 Trip
The Siemens 3VA2010-5JQ32-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current (Iu) across the full ambient range of 40 °C to 70 °C — no derating needed up to that ceiling. That flat thermal curve simplifies panel sizing in warm enclosures or adjacent to heat sources. Three-pole line-protection version with an ETU560 electronic trip unit. The ETU560 is a programmable overcurrent release offering adjustable long-time, short-time, instantaneous, and ground-fault protection — not a fixed thermal-magnetic, so coordination studies can be tuned in the field without swapping the breaker. Breaking capacity runs 187 kA at 240 V AC, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3 kA at 690 V. That 187 kA at 240 V puts it in the high-interrupting tier — suitable for large transformer secondaries or high-fault buswork where standard MCCBs would need upstream fusing.
Physical Fit and Panel Integration
Footprint: 105 mm wide, 181 mm tall, 86 mm deep. That width is a standard 3-pole MCCB form factor for SENTRON 3VA2 frames — drops into existing panel cutouts designed for the series without re-drilling the mounting plate. Front face is IP40 rated — protected against tools and small wires, but the body is not sealed for washdown. Suitable for indoor panel mounting; keep it behind the enclosure door in dusty or damp environments. Rated insulation voltage Ui is 800 V, so the internal clearances and creepage are designed for 690 V AC systems with margin. Operating voltage max is 690 V AC, covering common 400/480/600 V industrial supplies.
Key Protective Features
N-conductor protection is adjustable from OFF to 20 %–160 % of the phase rating — useful for 4-wire systems where the neutral may carry harmonic currents or require a different threshold than the phase conductors. Built-in communication function (the JQ in the order code suffix indicates this) enables integration with a BMS or SCADA system for remote monitoring and trip-event capture. No separate communication module needed. Maximum power loss is 13.5 W — negligible for panel thermal calculations, but worth noting if the breaker is enclosed in a small, non-ventilated pull box with other heat sources.