ABB RB121-60-230VUC 1SNA645020R0100

ABB RB121 Interface Relay

Description

The ABB RB121-60-230VUC is a versatile and compact interface relay designed for reliable switching in industrial automation systems. Its key feature is the wide-range universal coil, which can be operated with any voltage from 60 to 230V AC or DC. This makes it a flexible component for various control applications, reducing inventory needs. The relay provides a single changeover contact for galvanic isolation and signal amplification. Its slim, 12.5mm design saves valuable space on the DIN rail.

Specifications

• Manufacturer: ABB
• Model: RB121-60-230VUC
• Order Code: 1SNA645020R0100
• Control Voltage (A1/A2): 60-230V AC/DC
• Output Contacts: 1 c/o (SPDT)
• Rated Switching Current: 6A at 250V AC
• Protection Class: IP20
• Mounting: DIN Rail

Label Info

• RB121-60-230VUC
• 1SNA645020R0100
• IEC/EN 60947-5-1
• UL/CSA: 250V AC/6A

Application

This interface relay is ideal for use in control cabinets for isolating PLC outputs, multiplying contacts, or switching small motors, lamps, and solenoid valves in industrial machinery and process control.

Country of Origin

Made in Morocco by ABB STOTZ-KONTAKT GmbH, Germany.

CO2 Impact

Opting for this pre-owned component avoids the emission of approximately 1.2 kg of CO2 compared to manufacturing a new one. This choice supports a circular economy and reduces industrial waste.

Availability

This product is an obsolete item but is available from our stock. Order now from spareparts2day for expert support and fast delivery.

FAQ

What is the main application for this RB121 interface relay?

Its primary applications are galvanic isolation between control circuits and load circuits, contact multiplication to drive multiple loads from a single signal, and signal amplification where a low-power control signal needs to switch a higher-power load.

Can this relay be used with both AC and DC control voltages?

Yes, absolutely. The ‘VUC’ in the model name stands for Voltage Universal Coil. It is designed to work reliably with any control voltage between 60V and 230V, whether it is AC or DC.

What is the width of this relay on a DIN rail?

The ABB RB121 series features a slim design with a width of just 12.5 mm. This allows for high-density mounting in control panels where space is limited.

Last Update: Friday, March 13, 2026

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