The R21-62F-12.0A-26170-3-V is a SNAPAK® Series hydraulic-magnetic circuit protector manufactured by Airpax/Sensata, designed to combine power switching, accurate circuit protection, and fuse functionality in a single compact unit. This two-pole toggle handle device is rated for 12.0 amperes and features a DC resistance of 0.020 milliohms and 50/60 Hz impedance of 0.021 milliohms, measured after 1 hour at 100% rated current. The unit incorporates fast-acting protection with pulse tolerance of 13 times rated current for delay codes 3, 4, 61F, and 62F, and operates reliably in vertical mount orientation at 45°C. The R21-62F-12.0A-26170-3-V is ideal for OEM applications requiring integrated circuit protection, power switching, and fuse holder functionality in a single mounted component, reducing assembly complexity and inventory requirements.