It is a 3-pole, fixed-thermal, fixed-magnetic configuration, certified to UL and CSA standards. This MCCB is designed for branch-circuit protection in panelboards, switchboards, and motor control centers, providing overcurrent and short-circuit protection for feeders and downstream equipment.
What the TMF 30-400 trip means for fit
The TMF 30-400 designation indicates a thermal-magnetic trip unit with a continuous current rating of 30 A and an adjustable magnetic trip range up to 400 A. The thermal element provides inverse-time overload protection for cables and conductors, while the magnetic element handles short-circuit interruption. The fixed thermal setting simplifies coordination studies, as the overload curve is fixed and repeatable.
The XT2L series mounts in standard panelboard or switchboard cubicles, with line and load connections accessible for bus bar or cable termination. UL and CSA markings confirm acceptance in North American installations, including NEC-compliant panels. The compact 3-pole footprint saves DIN rail or mounting plate space compared to larger-frame breakers, making it suitable for retrofit into existing panels where space is tight.