Siemens SENTRON 3VA2340-5HN32-0AB0 — 400 A Molded Case Circuit Breaker for Line Protection
The Siemens SENTRON 3VA2340-5HN32-0AB0 is a 3-pole molded case circuit breaker (MCCB) rated for 400 A continuous current, designed specifically for line protection in distribution panels and industrial switchgear. At 240 V it interrupts 187 kA, dropping to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V — the full interrupting rating curve you need for selectivity studies. The 400 A frame carries through 50 °C without derating; above that, it steps down to 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C.
Panel Fit & Integration — 138 mm Wide, 248 mm Tall, 110 mm Deep
At 138 mm wide by 248 mm tall by 110 mm deep, this MCCB fits standard SENTRON 3VA panel cutouts and busbar systems. The 3-pole form factor with 2 HP auxiliary switches mounts directly onto the DIN rail or screw-fixed mounting plate common in industrial enclosures. Maximum power loss is 96 W — factor that into your enclosure thermal calculation for a 400 A continuous load.
Environmental & Compliance — Full Temperature Range, No Undervoltage Release
Rated for operation from -25 °C to 70 °C and storage from -40 °C to 80 °C. This variant ships without an undervoltage release and without ground-fault monitoring, so it is a straight line-protection breaker — no auxiliary release or communication function. The supplied basic switch is order code 3VA2340-5HN32-0AA0.