What this 3VA1 breaker carries
The Siemens 3VA1080-2ED42-0BC0 is a 4-pole IEC frame 100 circuit breaker with a breaking capacity class B rating of Icu=16kA at 415V. It is configured for line protection with a TM210 thermal-magnetic trip unit, fixed overload protection at Ir=80A, and fixed short-circuit protection set to Ii=10 x In. The N conductor is unprotected, and the breaker includes a nut keeper kit, an undervoltage release (UVR) coil at 24V DC, and two HQ auxiliary switches.
What the ratings mean for fit
The 16kA breaking capacity at 415V (class B) tells you this breaker can safely interrupt fault currents up to that level on a 400V three-phase system without upstream cascading — a standard requirement for IEC distribution panels in commercial and light industrial builds. The fixed 80A overload and 10x In short-circuit pickup mean no field-adjustable dials; the trip curve is locked, which simplifies BOM consistency but requires confirming the load's inrush profile against a 10x magnetic threshold.
Integration notes
The 4-pole form factor with unprotected N conductor suits TN or TT systems where the neutral is not switched. The 24V DC undervoltage release coil draws from a control supply — verify polarity and that the supply can hold the coil closed; dropout voltage is typically below 18V DC. The two HQ auxiliary switches provide status feedback for PLC or indication circuits. The nut keeper kit aids panel mounting on a DIN rail or backplate.