The RR3B-USAC120V is a 3-pole general-purpose power relay from IDEC's RR Series, featuring a 120V AC coil with blade (B) termination and 3PDT (3-pole double-throw) contact configuration. The relay operates at 20.5 mA rated current (60 Hz) with a coil resistance of 2100 O and an inrush current of 35 mA, delivering switching capacity of 10 A at 120V AC resistive and 7.5 A at 120V AC inductive loads. It exhibits fast response with an operating time of 25 ms maximum and release time of 25 ms maximum, with contact resistance of 30 mO maximum and silver contact material for reliable performance. The relay is rated for -30 to +70 °C operating temperature, withstands 1,800 operations per hour, and achieves over 500,000 electrical operations at 120V 50/60 Hz with 10 A load. Typical applications include industrial control panels, motor starters, lighting control, and general-purpose switching in HVAC systems and machinery.