Siemens 3VA2225-8HL32-0JA0 — 250 A MCCB with Shunt Trip, Current Production
The Siemens SENTRON 3VA2225-8HL32-0JA0 is a 3-pole molded case circuit breaker rated for 250 A continuous current, designed for line protection in distribution panels and industrial switchgear. It carries a shunt trip release (STL) for remote tripping, and its breaking capacity reaches 440 kA at 240 V, 330 kA at 415 V, and 52.5 kA at 690 V — figures that cover most low-voltage fault scenarios without cascading upstream.
What the Key Ratings Mean for Your Panel
The 250 A continuous rating is the breaker's nominal current — it can carry that load indefinitely without tripping. The interrupting ratings (–) tell you the maximum fault current it can safely clear at each voltage: 440 kA at 240 V is extremely high, suitable for transformer-secondaries or high-fault busways; 52.5 kA at 690 V still covers most industrial installations. The 3-pole construction handles three-phase circuits, and the shunt trip release lets a control system or emergency-stop circuit open the breaker remotely — common in automated lines or safety circuits. Thermal derating (–) is the spec that trips up panel builders: at 55 °C the breaker still carries 241 A, but at 70 °C it drops to 213 A. If your enclosure runs hot, size the breaker for the derated value, not the 250 A nameplate. Maximum power loss is 48 W — negligible for ventilation planning in a standard enclosure.
Panel Integration and Mounting
The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep (–). It mounts on a DIN rail or directly to a backplate via the SENTRON 3VA mounting base. The 86 mm depth is shallow enough for most 200 mm-deep enclosures, leaving room for wiring gutters and busbar connections. No auxiliary switch is fitted, but the shunt trip occupies the auxiliary release slot — verify that your control voltage matches the shunt trip rating before wiring.