The SCR series are tower and obstruction lighting controls used in a variety of applications. The SCR430T and SCR630T are universal lamp alarm relays designed to sense the failure of flashing or steady incandescent beacon lamps or steady side lights. The SCR9L is a universal lamp alarm relay designed to sense the failure of flashing or steady LED beacon lamps or obstruction lamps. The SCR490D series is used to provide remote monitoring of steady burning incandescent marker and obstruction lighting. Four onboard switches allow operator programming for lighting systems with two through nine lamps on a single AC circuit.

Littelfuse® SSAC® Lamp Alarm Relay, Universal, Series: SCR, 50/60 Hz Frequency, 120 VAC Coil, 1 Form C SPDT Contact Form, 10 A at 240 V AC, 30 V DC Contact, Threaded Mounting, Screw Terminal, -40 to 65 deg F, 3-1/2 in H x 2-1/2 in W x 1-3/4 in D Dimensions

• Toroidal current sensing provides isolation from the lighting circuit and allows monitoring of multiple lines simultaneously
• Monitors 1 to 4 side lights or up to 4 beacon lamps senses failed incandescent flashing beacon or steady obstruction lamps
• Isolated, 10 A, SPDT alarm output plus one 1 A, solid state line voltage alarm output provides alarm indication and can also be used for remote monitoring of the lighting system
• Fixed trip delay (6 s) prevents nuisance alarms
• Switch selectable number, voltage and wattage of lamps user selectable to meet wide application needs with one relay

• Owners/User Manual https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Littelfuse_L60030C-2PQ_User_Manual.pdf
• Specification Sheet https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Littelfuse_SCR430T_Specification_Sheet.pdf