What this MCCB carries — and what that means in the panel
The Siemens SENTRON 3VA2440-7HL32-0BH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, meaning it sits at the feeder or main breaker position in a distribution panel — not a motor-circuit protector. Its continuous current rating holds at 400 A from 40 °C all the way up to 70 °C (–), so no derating headache when the panel runs warm. The adjustable trip range spans 600 A to 4800 A, which gives you a wide selectivity window downstream. Interrupting capacity hits 330 kA at 240 V AC and still carries 242 kA at 415/440 V — that is serious fault-current headroom for a 400 A frame, meaning it can handle high-available-fault installations without cascading upstream.
Dimensions and panel fit
The breaker envelope is 248 mm tall by 138 mm wide by 110 mm deep — a standard SENTRON 3VA frame size for this rating class. The 138 mm width means it occupies three 45 mm pole spaces on a DIN rail or mounting plate. Depth of 110 mm leaves enough finger clearance behind a gland plate for rear-connected bus bars or cable lugs.
Built-in auxiliaries and releases
Factory-fitted with an undervoltage release (UVR) and a configuration of 2 auxiliary switches plus 1 trip alarm switch. The UVR drops the breaker when control voltage falls — common on safety circuits or emergency-stop chains where you want the main breaker to open on loss of control power. The trip alarm switch gives a positive signal that the breaker has opened on fault, not manually. No ground-fault monitoring on this variant; if you need that, look at the GF version of the same frame.
Lifecycle and sourcing posture
This order code carries a current-production lifecycle status. The basic switch variant is 3VA2440-7HL32-0AA0, which is the core breaker without the auxiliaries — so if you already have that base model in a BOM, the -0BH0 adds the UVR and alarm switch on the same frame. Sourced and quoted to order through independent distribution; availability and current pricing confirmed at quote time.