A line of general-purpose electromechanical relays comes in three mounting styles for use with motors that constantly cycle on and off. HD-1 relays are rated for 40A at 240 VAC/30 VDC, 1 HP at 120VAC, 2 HP at 240 VAC operation and provide 1 x 107 mechanical and 1 x 105 electrical operations life expectancy. They are available in PCB, TMP, and panel-mount styles with SPST (1-Form-A), SPST-NC (1-Form-B), and SPDT (1-Form-C) contact configurations. 

These relays exhibit 50-ohm initial contact resistance, 10-55 Hz, 1.5 mm double amplitude vibration resistance, and minimum 10 g shock resistance.