The Siemens 3VA2040-6JP36-0AA0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for 40 A continuous current, built for line protection in distribution panels. The ETU550 electronic trip unit gives you adjustable time-current curves — tr min 0.5 s, tr max 25 s, tsd max 0.5 s — so you can dial in selectivity with downstream breakers without swapping hardware.
Breaking capacity and voltage class
The interrupting ratings tell you where this MCCB fits in the fault-current hierarchy: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V. At 690 V the capacity drops sharply — that 3 kA figure means it is not a primary choice for 690 V distribution unless the available fault current is known to be low. The rated insulation voltage is 800 V, so the internal clearances support that voltage class even if the breaking curve does not.
Thermal performance across temperature
Rated continuous current holds at 40 A from 40 °C all the way up to 70 °C — no derating needed in a warm enclosure. The operating temperature range spans -40 °C to 70 °C, with storage from -40 °C to 80 °C. Maximum power loss is 2.2 W, which is negligible for panel heat budgeting.
Physical fit and panel integration
Dimensions are 105 mm wide, 181 mm high, 86 mm deep. Front protection is IP40 — suitable for enclosed panel mounting where no water spray is present. The MCCB mounts on a standard DIN rail or can be bolted directly; the 3-pole footprint matches the SENTRON 3VA2 frame size, so it drops into existing cutouts without rewiring if the panel was designed for a 3VA2-series breaker.