What it is and what the ratings mean for fit
The Siemens 3VA2116-5JP36-0AF0 is a SENTRON molded case circuit breaker (MCCB) in the 3VA2 series, configured as a 3-pole line protection device with an ETU550 electronic trip unit. It carries a rated continuous current (Iu) of 160 A across the full ambient temperature range from 40 °C through 70 °C — no derating needed up to that ceiling, which simplifies panel thermal budgeting. The breaking capacity figures tell you where it can sit in a fault-current study: 187 kA at 240 V, 121 kA at 415 V and 440 V, 76 kA at 500 V, and 3.8 kA at 690 V. For a 415 V distribution board, that 121 kA SCCR means it safely interrupts faults up to that level without cascading upstream — a strong selectivity anchor for a main or tie breaker.
Dimensions and panel integration
Footprint is 105 mm wide by 181 mm tall by 86 mm deep — a standard 3-pole MCCB form factor for DIN-rail or direct-panel mounting. The front face carries IP40 protection, sufficient for enclosed distribution boards. Power loss at full load is 25.5 W maximum; account for that in enclosure thermal calculations if grouping multiple breakers.
Environmental and endurance specs
Operating temperature range is -25 °C to 70 °C; storage range extends from -40 °C to 80 °C. Mechanical endurance is rated at 20,000 operations. Rated insulation voltage (Ui) is 800 V, which covers 690 V systems with margin.