What it is and what it does
The Siemens 3VA2125-7HL46-0AA0 is a SENTRON molded case circuit breaker for line protection. It is a 4-pole unit rated for 25 A continuous current with an ETU320 electronic overcurrent release. Insulation voltage is rated at 800 V.
Breaking capacity — the real-world fault rating
The interrupting rating varies sharply with system voltage: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. That 3.7 kA figure at 690 V is the limiting factor — if your panel feeds a 690 V bus, this breaker is only good for low-fault-current branches. At 400/415 V, 242 kA is serious headroom for most industrial switchboards; you can coordinate it downstream without worrying about the main tie giving way first.
Physical fit and panel integration
Dimensions are 181 mm high, 140 mm wide, 86 mm deep. That 140 mm width is standard for a 4-pole SENTRON 3VA2 frame — it will occupy the same mounting footprint as other 3VA2 four-pole breakers. The front face carries IP40 protection, meaning tools and fingers are kept out but it is not sealed against dust ingress; install it inside a panel with a door, not in a washdown zone. No undervoltage release and no communication function on this variant — it is a plain breaker, no shunt trip or remote monitoring built in.
Lifecycle and sourcing posture
The lifecycle stage is marked as current production. This is not an obsolete or NRND part — it is Siemens' active SENTRON 3VA2 generation, still specified into new panels. Sourced and quoted to order through independent distribution; availability and current pricing confirmed at quote time against an RFQ.