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Solid state relays should last for many years if properly protected. Watlow solid state relays include an internal voltage snubber for protection from fast transient voltages. SSRs require a small voltage to switch their load. The heat generated by the relay's switching action can accumulate depending on the cycle time and reduce the life of the relay. This heat should be removed by mounting the SSR on an appropriately sized heat sink. The relay should also be protected with Semiconductor Fuses which can open in tenths of a millisecond during a high fault short. The fuse amp rating should be 125% of the relay’s load current.
Reference: KS-100
Clear Polycarbonate Protective Cover Fits Hockey Puck Style Solid State Relays Made Simple To Install
Reference: RPC-5386-0000
Brand: Watlow Electric Mfg.
Designed For DC Controled SSRs 10A ~ 40A Mounts Directly On SSR Control Terminals Monitors SSR Control Voltage And Load Output Load Output Thru SSR With No Control Signal Activates Alarm Alarm Is A Triac Rated 300mA@120~240Vac Alarm Can Be Wired To Audio/Visual Device
Reference: Z100-0815-000B
Brand: Watlow Electric Mfg.
Aluminum Body With A Black Anodized Finish Rated At 1.1°C/W Designed For Use With Hockey Puck Style Solid State Relays Width 3.2"(81mm) x 3.7"(94mm) Long x 2.9"(74mm) High Din Rail Mounted OR Base Mounted Relay Mounting Holes Are 8/32 Threads Removes Heat Away From Solid State Relays
Reference: 0830-0574-0000
Brand: Watlow Electric Mfg.
Hockey puck style SSR thermal transfer pads are highly recommended for proper relay installations.
