52-337 - SOLENOID

52-337, Pollak Solenoid. Starter Solenoid, 12V Cont. Duty 100 Amp, with Diode. When power is applied to the relay coil, a magnetic field is created and energy is stored in the coil. When power is removed, the magnetic fieldcollapses causing a reverse voltage to be generated (it's called inductivekickback or back EMF). The back EMF can easily reach 200 volts. The diode will absorb the reverse voltage spike. This voltage, if not absorbed by the diode, will cause premature failure of switch contacts or feed back to other crucial vehicle electrical parts. Side Mount Bracket.