The TM240 overcurrent release combines a thermal element for overload protection and a magnetic element for short-circuit response, tuned for 240 A short-circuit pickup. The 16 A rating is maintained without derating across the 40 °C to 55 °C ambient range, dropping to 15 A at 60 °C to 70 °C — useful for panels that run warm in summer conditions.
Breaking capacity — the real selectivity number
Breaking capacity is the headline spec for an MCCB, and this one delivers 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. At 415 V — the most common industrial three-phase voltage — 75.6 kA covers high-fault scenarios like transformer-secondaries or large motor banks.
Dimensions are 130 mm height, 101.6 mm width, 70 mm depth — a 4-pole MCCB that fits standard Siemens 3VA panel cutouts and busbar systems.