Signal Relays

About Signal Relays

A signal relay routes a low-level control voltage from a PLC output to a solenoid, valve, or interlock—often millions of times over the life of a machine, so contact reliability and coil power consumption matter. Specifying engineers focus on coil voltage (5 V to 24 V DC), contact configuration (SPST through 4PDT), contact material (gold-plated for dry circuits, silver for general loads), and maximum switching current. Omron, Panasonic, TE Connectivity, and Hongfa supply the most commonly cross-referenced families. Check live stock counts, compare insertion loss for RF-rated variants, and download datasheets before placing a BOM quote.