ABB 1SNA645007R0100 Interface Relay

ABB 1SNA645007R0100 Interface Relay is a boxed RB121G DIN-rail module that provides a single Form C (SPDT) contact for compact control-panel switching. It uses a universal 115 V coil (115 VAC or 115 V DC) compatible with 50/60 Hz systems and can switch up to 6 A at 250 VAC, making it suitable for signaling and interlocking tasks in industrial automation. The relay features gold-plated contacts for low resistance and long-term reliability, plus an LED indicator to confirm coil energization at a glance. It mounts on a DIN rail with screw terminals and is housed in an IP20/NEMA 1 enclosure, designed for indoor control cabinets and rugged operating environments. Typical applications include isolating controllers from higher-power AC loads, providing clearly visible signaling paths in PLC and automation circuits, and integrating sensors or switches into control systems where a robust SPDT interface relay is required. The device is identified by order code 1SNA645007R0100 and aligns with ABB’s RB Series interface relays, offering 50/60 Hz operation and straightforward installation in standard industrial panels.