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.
No undervoltage release and no communication function on this variant — it is a plain breaker, no shunt trip or remote monitoring built in.
This is not an obsolete or NRND part — it is Siemens' active SENTRON 3VA2 generation, still specified into new panels.