Why Choose the ABB RBR121G-115VUC R600 Interface Relay?
The ABB RBR121G-115VUC is a compact and reliable electromechanical interface relay designed for electrical signal switching, isolation and control in industrial automation systems. As part of the ABB R600 interface relay series, it provides an effective connection between PLCs, industrial controllers and electrical loads, enabling dependable switching of control signals and equipment.
This interface relay features one changeover (SPDT) contact with gold-plated contact surfaces, providing reliable switching across a broad current range from 3 mA to 6 A. Its contact arrangement allows the relay to perform signal conversion, control circuit isolation and switching operations in industrial machinery and automation equipment.
With a rated control supply voltage of 115 V AC/DC and a switching contact rating of 250 V AC / 6 A, the RBR121G-115VUC is suitable for industrial control panels, motor control circuits and automated production equipment. Its compact 6 mm-wide housing, spring connection terminals and DIN rail mounting make it particularly useful in electrical cabinets where installation space and wiring efficiency are important.
Key Advantages
- Compact electromechanical interface relay designed for industrial automation and control applications.
- 115 V AC/DC rated control supply provides compatibility with AC and DC industrial control circuits.
- One changeover (SPDT) contact offers flexible normally open and normally closed switching functions.
- 3 mA to 6 A switching current range supports low-current signals and industrial control loads.
- Gold-plated contacts provide dependable switching of low-current electrical signals.
- 250 V AC contact voltage rating suitable for industrial control applications.
- Electrical isolation between the relay coil and switching contacts.
- Spring connection terminals simplify installation and provide secure, vibration-resistant wiring.
- 6 mm slim housing reduces space requirements in electrical control panels.
- Integrated LED indication provides convenient visual monitoring of relay energisation.
- DIN rail mounting allows straightforward integration into modular industrial control systems.
- Robust relay construction supports reliable operation in demanding industrial environments.
Key Features
- ABB R600 boxed interface relay series.
- RBR121G-115VUC model with spring connection terminals.
- 115 V AC/DC rated control supply voltage.
- One changeover (1 c/o / SPDT) output contact.
- 3 mA to 6 A contact switching current range.
- 250 V AC rated contact voltage.
- Gold-plated silver-tin-oxide contact material.
- Electromechanical switching with galvanic separation between coil and contacts.
- Integrated LED for relay operating status indication.
- Spring terminal connection technology for secure electrical wiring.
- Compact 6 mm module width.
- Snap-on DIN rail mounting.
- Relay integrated into a protective modular housing.
- Suitable for electrical signal isolation, amplification and matching.
- Designed for PLC interfacing and industrial control circuits.
- Flame-retardant housing construction.
Technical Specifications
- Manufacturer: ABB
- Series: R600 Interface Relays
- Model: RBR121G-115VUC
- ABB order code: 1SNA645507R0300
- Product type: Electromechanical interface relay
- Product group: Interface Relays & Optocouplers
- Rated control supply voltage: 115 V AC/DC
- Control voltage type: AC/DC
- Output contact configuration: 1 changeover (1 c/o / SPDT)
- Number of changeover contacts: 1
- Maximum switching voltage: 250 V AC
- Switching current range: 3 mA to 6 A
- Maximum switching current: 6 A
- Contact material: Silver-tin-oxide, gold-plated (AgSnO2/Au)
- Switching technology: Electromechanical relay
- Electrical isolation: Galvanic isolation between coil and contacts
- Status indication: Integrated LED
- Connection type: Spring terminals
- Mounting type: Snap-on DIN rail mounting
- Module width: 6 mm
- Dimensions (H × W × D): 67.5 × 6 × 70 mm
- Net weight: Approximately 0.02 kg
- Protection rating: IP20
- Housing flammability classification: UL 94 V-0
- Applicable standards: IEC/EN 60947-5-1, UL 508, CAN/CSA C22.2 No. 14
- EAN / GTIN: 4013614508233
Reliable Signal Switching and Isolation for Industrial Automation
Interface relays such as the ABB RBR121G-115VUC are used to connect industrial controllers with external electrical circuits while providing galvanic isolation between the control input and switching output. When the relay coil is energised by a compatible 115 V AC/DC control signal, the internal changeover contact switches position, allowing connected equipment to be controlled through normally open or normally closed contact arrangements.
The relay's gold-plated changeover contacts are particularly useful where reliable switching of low-current control signals is required. With a switching range extending from 3 mA to 6 A, the device can accommodate a variety of industrial control applications, including PLC signal interfacing, control circuit switching and electrical status signalling.
Unlike semiconductor optocouplers, the RBR121G-115VUC uses a conventional electromechanical contact arrangement. This provides a versatile changeover output that can be integrated into different control circuit configurations, subject to the specified electrical contact ratings.
The spring terminal connection system helps maintain consistent electrical contact pressure and supports secure wiring in environments subject to mechanical vibration. Combined with its slim 6 mm R600 housing and DIN rail mounting, the relay provides an efficient solution for high-density industrial control panel installations.
Typical Applications
- PLC input and output interfacing in industrial automation systems.
- Industrial electrical control panels and automation cabinets.
- Motor control and auxiliary control circuits.
- Electrical signal isolation and amplification.
- Low-current signal switching and control circuit interfacing.
- Industrial machinery and automated production equipment.
- Conveyor and material handling control systems.
- Process automation and instrumentation circuits.
- Electrical alarm and status indication systems.
- Control circuit switching for pumps, fans and auxiliary equipment.
- OEM machinery and industrial electronic control systems.
- Compact DIN rail installations requiring reliable changeover contacts.
