The Mitsubishi R61P is the active-production power supply for the MELSEC iQ-R backplane, converting 100–240 V AC to 5 V DC at 6 A. The IP65 rating is notable — a rack power supply often lives inside a sealed panel, but this one tolerates washdown or dusty environments without an extra enclosure.
How it compares to the R64P
Same iQ-R rack footprint — both are 54.6 mm wide and 110 mm deep — so the R61P physically drops into a slot that was specified for the R64P. The R64P delivers 9 A at 5 V DC; the R61P is the 6 A variant. Genuine is genuine: same series, same input voltage range, just a different output current tier. If your load is 6 A or under this part fits without rewiring.