The Mitsubishi CP30-BA1P21M2A is a 1-pole 2A circuit protector from the CP30-BA series, designed for protecting low-capacity control circuits in industrial automation panels. Rated for 250VAC / 65VDC with a short-circuit breaking capacity of 2.5kA (UL1077 / IEC60947), it combines advanced breaker technology in a compact 17.5mm wide DIN-rail mountable housing. The CP30-BA series uses a thermal-magnetic trip mechanism with M-type (medium trip) characteristic suitable for protecting control transformers, solenoid valves, relays, PLC power supplies, heaters, and electronic circuits. Typical applications include industrial control panels, machine tool electrical cabinets, conveyor system auxiliary circuits, HVAC control protection, and semiconductor manufacturing equipment where reliable branch circuit protection is required in space-constrained installations.
**Q: What is the difference between a circuit protector and a standard circuit breaker?**
A: Circuit protectors like the CP30-BA are designed specifically for low-current control circuits (typically 1-30A), with more precise trip characteristics and compact DIN-rail mounting. Standard MCCBs are typically for higher current branch and feeder protection. The CP30-BA is UL1077 recognized as a supplementary protector.
**Q: What does the "M" trip characteristic mean?**
A: M-type (Medium) trip characteristic provides a balance between thermal overload protection (for sustained low-level overcurrent) and magnetic short-circuit protection (for high fault currents). This makes it suitable for general control circuit protection where moderate inrush currents may occur.
**Q: Can a 1-pole CP30-BA protect both AC and DC circuits?**
A: Yes, the 1-pole CP30-BA is rated for 250VAC and 65VDC. For higher DC voltages, a 2-pole model (rated 125VDC with poles in series) should be used.
**Q: What is the replacement for this discontinued model?**
A: The CP30-BA series is a mature product. Current Mitsubishi equivalents include the CP-S series circuit protectors for DIN-rail control circuit applications. For UL applications, consider the Mitsubishi CP series supplementary protectors.
**Q: How do I identify the exact current rating from the model number?**
A: The final characters in the model number indicate the rated current. For example, "M2A" = M-type trip, 2 Amps; "M5A" = M-type trip, 5 Amps; "MD7A" = M-type trip for DC, 7 Amps. Always verify against the physical nameplate for the exact rating.
