What this 500 A MCCB brings to a panel
Four poles give you the option to switch a neutral or protect a three-phase plus neutral system in a single envelope, common in North American and IEC distribution panels where the neutral needs isolation. The 500 A frame carries a 500 A minimum rating.
Breaking capacity — what the voltage columns tell you
This breaker delivers 121 kA at 240 V, 75.6 kA at 415/440 V, 52.5 kA at 500 V, and 11.9 kA at 690 V — the interrupting rating drops as voltage climbs, which is typical for a thermal-magnetic MCCB. The 121 kA at 240 V is especially useful on the secondary side of a step-down transformer where fault current can spike; the 690 V rating at 11.9 kA covers 600 V class systems but watch the available fault current at that voltage.
Temperature derating — real-world continuous current
At 55 °C it derates to 488 A, at 60 °C to 476 A, at 65 °C to 464 A, and at 70 °C to 452 A.
The 184 mm width is the critical dimension for multi-breaker lineup spacing; verify your bus bar centers before committing the layout.
What the TM240 release means for coordination
The TM240 designation indicates a thermal-magnetic trip unit with a 240 A fixed rating. The breaker itself is rated 500 A continuous. Confirm the trip unit setting matches your load.