The Siemens 3VA2116-7JQ42-0AA0 is a 4-pole SENTRON molded case circuit breaker (MCCB) rated for 160 A continuous at 40 °C, with an ETU560 electronic trip unit. It's a line-protection breaker meant for distribution panels where you need selective coordination downstream — the 330 kA interrupting capacity at 240 V AC gives you headroom for high-fault service entrances or transformer secondaries, and it still holds 242 kA at 415 V and 440 V, dropping to 3.7 kA at 690 V. The 800 V rated insulation voltage means it's comfortable on 480 V and 600 V class systems without derating the basic impulse level.
What the ratings mean for fit
The 160 A rating holds flat across the whole 40 °C to 70 °C range — no derating needed as the panel warms up, which is unusual for an MCCB and saves you from oversizing the frame. The ETU560 is a communicating electronic trip unit, so this breaker talks to your building management or SCADA system for load monitoring and trip-event capture. The N-conductor protection is adjustable from OFF to 20 % to 100 % of the phase rating, which matters if you're feeding a nonlinear load with high triplen harmonics on the neutral.
Panel fit
The 3VA2116-7JQ42-0AA0 measures 181 mm high, 140 mm wide, and 86 mm deep. It mounts on a DIN rail or directly to a backplate with the standard 4-pole MCCB footprint. The front face carries an IP40 protection class — fine for a dry indoor panel, but keep it out of washdown zones. Power loss is 25.5 W maximum, so factor that into your enclosure thermal budget if you're packing several breakers in a row.