The Siemens 3VA2450-5HK32-0DC0 is a 3-pole molded case circuit breaker on the 3VA2 IEC frame 630, rated for line protection with an ETU340 electronic trip unit. Overload protection is adjustable from 200A to 500A, with short-circuit protection fixed at 14 x In, giving the commissioning engineer room to coordinate downstream feeders.
Trip unit and settings
The ETU340 provides LI (long-time and instantaneous) protection. Long-time pickup Ir is adjustable from 200A to 500A, matching the In=500A rating. Instantaneous pickup Ii is fixed at 14 x In, so the breaker clears hard faults at 7000A. No ground-fault module here — this is a straight line-protection build, typical for feeder breakers in a switchboard.
Accessories integrated
An auxiliary switch changeover H is also fitted, giving a dry contact for PLC status input or SCADA alarm. Both are factory-installed, not field-add kits.
This is a current-production Siemens catalog number. No direct pin-compatible alternate exists — the 3VA2 frame is a specific IEC design with a unique mounting footprint and accessory rail. If you need a dual-source option, Siemens offers the 3VA2 platform across multiple trip units and accessories, but each order code is a fixed configuration.