Product Details for ABB RB121-24VAC/DC

Description

The ABB RB121-24VAC/DC is a high-quality interface relay designed for industrial control systems. It provides reliable signal switching in a compact, DIN-rail mountable housing. This relay is ideal for applications requiring galvanic isolation between control circuits and load circuits, featuring a versatile 24V AC/DC coil and an integrated LED for status indication.

Specifications

• Manufacturer: ABB
• Model: RB121-24VAC/DC
• Part Number: 1SNA 610004 R0700
• Coil Voltage: 24V AC/DC
• Contact Configuration: 1 Changeover (C/O), SPDT
• Maximum Switching Voltage: 250V AC
• Maximum Switching Current: 8A
• Mounting Type: DIN Rail

Label Info

• Brand: ABB Entrelec France
• Model: RB121-24VAC/DC
• Order Code: 1SNA 610004 R0700

Application

This interface relay is commonly used in automation panels, machine control, building automation, and process control systems to switch loads such as small motors, contactors, solenoid valves, and indicator lamps.

Country of Origin

This product is manufactured in France.

CO2 Impact

Opting for this reused component saves an estimated 1.2 kg of CO2 compared to manufacturing a new one, contributing to a more sustainable industrial environment.

Availability

This item is an obsolete component but is available from our stock. Order now from PLC2Day for expert support and fast delivery.

FAQ

Its primary use is as an interface between low-power control signals (like from a PLC output) and higher-power loads. It provides electrical isolation and signal amplification in a compact form factor.

No, the LED is an integrated component soldered onto the internal PCB and is not designed to be user-replaceable.

While exact figures vary, relays of this type typically have a mechanical lifespan of several million cycles and an electrical lifespan of over 100,000 cycles at rated load, ensuring long-term reliability.

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Last Update: Friday, March 13, 2026