SENTRON 3VA2 MCCB — 25 A, 4-Pole, ETU320
The Siemens 3VA2025-7HL42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 25 A continuous current, configured as a 4-pole unit with an ETU320 electronic overcurrent release. It is designed for line protection — the standard role of protecting cables and busbars against overload and short-circuit in a distribution panel. The ETU320 trip unit supports an adjustable current range from 38 A minimum to 300 A maximum, giving the specifying engineer flexibility to match the breaker to the actual load without swapping hardware. At the 25 A continuous rating, the breaker is set at the lower end of that range, suitable for smaller feeder circuits or sub-distribution boards. Breaking capacity is substantial: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3 kA at 690 V. These figures mean the breaker can safely interrupt very high fault currents on low-voltage systems, typical for industrial switchboards with large transformers upstream.
Physical fit and panel integration
Dimensions are 181 mm height, 140 mm width, and 86 mm depth. The 140 mm width across four poles is standard for a 4-pole MCCB in this frame size — it occupies the same footprint as other SENTRON 3VA2 breakers, so a panel layout designed for a 3VA2 family member accepts this unit without re-drilling the mounting plate. Front protection is IP40, meaning tools and fingers are kept out but the breaker is not sealed against moisture. It mounts on a DIN rail or directly to a backplate via the screw terminals; the IP40 rating is adequate for enclosed switchboards where the cabinet door provides the environmental seal.
Lifecycle and sourcing reality
For a BOM line that requires this exact order code, the part is sourced to order through independent distribution. Availability and current pricing are confirmed at quote time against an RFQ. The paperwork — RoHS, REACH, CE, and UL/IEC compliance declarations — is standard with the shipment; Siemens provides these on request for each production batch.