The Mitsubishi Q61P-A2 is a power supply module for the MELSEC-Q series PLC rack, converting 200-240 V AC input to a 5 V DC bus at 6 A rated output. Inrush current hits 20 A within 8 ms on power-up, so factor that into your upstream breaker coordination — a C-curve MCU or a slow-blow fuse handles it cleanly. Input frequency tolerance is 50/60 Hz ±5%, covering both mains standards without derating.
Mounts directly into the MELSEC-Q base unit slot. Terminal screw size is M3.5×7 — use a torque driver at 0.8 N·m to avoid stripping the threads on the cage clamp. The overvoltage protection trips between 5.5 and 6.5 V on the 5 V rail, so if you see a bus fault code on the CPU, check the module's output before swapping the CPU. Maximum input apparent power is 105 VA; the 6 A at 5 V DC gives you 30 W of usable bus power, leaving headroom for a fully loaded rack of I/O and special-function modules.