The Siemens 3VA2010-5JQ32-0DC0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection duty. It carries a full-scale current setting of 100 A across the full ambient temperature range from 40 °C to 70 °C, with no derating needed up to that ceiling — the thermal curve holds flat at 100 A from 40 °C through 70 °C. That means you can install it in a warm panel or near other heat sources without recalculating the trip point.
Breaking capacity and selectivity headroom
Breaking capacity is the headline number that decides whether this MCCB clears a fault before the upstream device. At 240 V it interrupts 187 kA; at 415 V and 440 V it holds 121 kA; at 500 V it still manages 75.6 kA. Only at 690 V does it drop to 3 kA — that is the limit for 690 V line-to-line applications. For a 400 V distribution panel, 121 kA gives generous selectivity headroom against a transformer or a larger upstream MCCB.
Adjustable trip and auxiliary functions
The adjustable overload trip range spans 150 A minimum to 1 200 A maximum, with an initial setting of 20 A. That wide band lets you tune the long-time pickup to the actual load without swapping the breaker body. An undervoltage release (UVR) is built in — it trips the breaker when control voltage drops, which is standard for emergency-stop chains and safety circuits that need a guaranteed open on power loss. Two auxiliary switches (HQ design) are fitted for remote status indication. Communication function is included, so the breaker can report its state to a BMS or PLC over the SENTRON communication bus.
Physical fit and panel integration
The 3VA2010-5JQ32-0DC0 measures 181 mm high, 105 mm wide, and 86 mm deep — a standard 3-pole MCCB footprint that fits most SENTRON distribution panels and retrofit slots. The 105 mm width is the pole pitch; verify the busbar or plug-in base spacing before committing the cutout. Power loss is 16 W maximum, which is moderate for a 100 A frame; factor it into the enclosure thermal calculation if you are packing multiple breakers in a sealed cabinet.