What the ratings mean for fit
The Siemens SENTRON 3VA2116-5HN32-0AL0 is a 3-pole molded case circuit breaker (MCCB) rated for 160 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed as panel temperature rises. That 160 A is the same at every point in that span, so the breaker delivers its full ampacity even in a crowded enclosure with elevated internal heat. Interrupting capacity is the headline number for an MCCB: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. At typical 400 V class distribution voltages this breaker handles 121 kA of prospective fault current — enough for most main or feeder positions in industrial switchgear without requiring a current-limiting upstream device. The ETU350 electronic trip unit provides adjustable overload and short-circuit protection curves. It includes a trip indicator for quick fault identification during troubleshooting. The auxiliary switch configuration is 2 auxiliary switches plus 1 trip alarm switch plus 1 electrical alarm switch HQ, giving the panel builder status feedback for PLC or SCADA integration.
Panel integration and footprint
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a standard 3-pole MCCB footprint that fits most Siemens SENTRON mounting bases and busbar systems. The front face carries IP40 protection, adequate for enclosed panel mounting where the door provides the overall IP rating. Rated insulation voltage is 800 V, so the breaker is suitable for 690 V line-to-line systems with margin. Maximum power loss is 25.5 W — a figure to check against the enclosure thermal budget, especially in multi-breaker panels. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Lifecycle and sourcing reality
The basic switch assembly is order code 3VA21165HN320AA0 — relevant if a replacement mechanism is needed without replacing the entire breaker. No undervoltage release, no ground-fault monitoring, and no communication function are built in; these are external accessories if required.