WRA Series DIN Rail PSUs. DIN Rail mountable power supplies ideal for industrial control. 3 phase AC Input voltage High efficiency up to 89% (WRA120), up to 91% (WRA240) and up to 93% (WRA960) Case material: metal Redundancy modules available: DRP10 ( ; 816-3926 816-3926 ) and DRP20 ( ; 816-3935 816-3935 )