The Siemens 3VA2225-6HL42-0BF0 is a 4-pole IEC frame 250 circuit breaker in breaking capacity class H, rated for 85 kA interrupting capacity at 415 V. It carries an ETU320 LI trip unit with a nominal current In = 250 A, overload protection adjustable Ir = 100 A to 250 A, and short-circuit protection Ii = 1.5 to 10 × In. The N-conductor protection is adjustable (OFF, 50%, 100%). An integrated undervoltage release (24 V DC) is included as an accessory for 3VA1 and 3VA20 frames, plus one auxiliary contact.
What the ratings mean for fit
The 85 kA Icu at 415 V places this breaker in the high-interrupting-capacity class (class H), meaning it can safely clear fault currents up to that level without upstream fuses or cascading — critical for high-fault installations like transformer secondaries or large motor control centers. The ETU320 LI electronic trip unit provides adjustable long-time (overload) and instantaneous (short-circuit) protection curves, letting you dial in Ir between 100 A and 250 A to match cable or busbar ampacity. The adjustable N-conductor protection (OFF, 50%, 100%) is useful for 4-wire systems where neutral current monitoring is required by code or design.
Panel integration notes
This is a 4-pole IEC frame 250 breaker — mounts in a standard switchboard or panel enclosure with busbar or cable connections. The included nut keeper kit simplifies torque-verified lug installation. The undervoltage release (24 V DC) is factory-integrated; verify coil polarity before energizing. The auxiliary contact provides a status signal for PLC or SCADA monitoring. No DIN-rail mounting — this is a bolted-frame breaker for fixed or draw-out chassis.