What this breaker is and what it does
The Siemens 3VA1110-3EF36-0JA0 is a 3-pole IEC frame 160 molded case circuit breaker with a 25 kA breaking capacity at 415 V (class N). It is rated In=100 A continuous current, with an adjustable thermal overload protection range (Ir) of 70 A to 100 A and a fixed short-circuit magnetic trip (Ii) set at 5 to 10 times In. The breaker includes a shunt trip (STL) release for remote tripping, rated 110-127 V DC or AC 50/60 Hz.
What the ratings mean for fit
The 25 kA Icu at 415 V places this in breaking capacity class N — it safely interrupts fault currents up to that level without upstream cascading, which is typical for commercial and light industrial distribution panels. The adjustable Ir (70-100 A) lets you match the overload protection to the actual load cable or motor FLA without swapping the breaker body. The shunt trip coil at 110-127 V AC/DC means it is compatible with standard control voltages in North American and European panels; verify polarity on DC circuits.
Panel integration
Clamp-type terminals accept copper or aluminum conductors without lug kits. The 3VA1 frame fits standard Siemens panelboard and switchboard mounting patterns. The shunt trip occupies the accessory slot on the left side; no additional wiring space is needed beyond the breaker's own line/load terminals.