Siemens 3VA2440-5HN32-0JC0 — 400 A SENTRON MCCB with 4800 A Frame
The Siemens SENTRON 3VA2440-5HN32-0JC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 400 A across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling. The 4800 A frame size gives it the mechanical and thermal capacity to handle high-fault scenarios, with interrupting ratings of 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V. That 187 kA at 240 V is the headline number for North American 240 V delta services; the 121 kA at 415 V covers the common European 400 V class. The 9 kA at 690 V is the limit for 690 V industrial networks — still adequate for most motor-control-center applications, but worth checking if your upstream transformer can deliver more.
Built-in Accessories and Variant Structure
This variant ships with a shunt trip (STL) auxiliary release and two HQ auxiliary switches factory-fitted. The shunt trip allows remote tripping via a control voltage — standard for emergency-stop circuits or PLC-driven disconnect sequences. The two auxiliary switches provide status feedback (open/closed) to a PLC or indicator lamp. The base switch variant is 3VA2440-5HN32-0AA0, meaning the -0JC0 suffix adds the shunt trip and aux switches as a pre-configured assembly. No undervoltage release or ground-fault monitoring on this build; if you need those, the -0JC0 is not the variant.
Electrical and Environmental Limits
Maximum power loss is 63.5 W — relevant for thermal management inside a sealed enclosure; ensure adequate ventilation or derating if multiple breakers are ganged. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The 400 A rating holds flat across the entire operating range, so no summer-derating calculation needed for this part. The 5 kA limited-to-1-second rating is a short-time withstand for selective coordination with downstream breakers — useful when designing a fully selective distribution panel.