ABB 1SVR730885R3300 Auxiliary Relay | 230V AC, 2 CO Contacts

ABB 1SVR730885R3300 CM-EFN.22 auxiliary relay. 2 CO, 10A, 230V AC coil, 35mm DIN rail mount. For control circuit interfacing.

Product: ABB 1SVR730885R3300 CM-EFN.22 Auxiliary Relay

The ABB 1SVR730885R3300 is a compact, general-purpose AC auxiliary relay from the CM-EFN series. It is designed for control and switching applications in electrical panels, providing reliable contact isolation and signal amplification.

Key Features

• Compact Design:​ Slim 17.5mm width for space-efficient DIN rail mounting.

• High Switching Capacity:​ Robust contacts for various AC and DC loads.

• Transparent Housing:​ Allows visual inspection of contact position and LED status.

• Clip-on Accessories:​ Easy attachment of side-mount mechanical flags or test buttons.

Technical Specifications

Function & Wiring

This is an electromechanical relay. When the 230V AC coil is energized, it magnetically pulls the armature, causing the common (C) contacts to switch from the normally closed (NC) to the normally open (NO) position. It is commonly used to interface between control devices (like PLC outputs) and higher-power loads, or to multiply contacts from a single control signal.

Typical Applications

• Interfacing PLC digital outputs with contactors, solenoid valves, or indicators.

• Control circuit logic and contact multiplication.

• Machine automation and control panels.

• HVAC and building management systems.

Important Note

• This relay does not provide forced-guided contacts​ (which are a safety feature to prevent NO and NC contacts from closing simultaneously). For safety-related applications (e.g., emergency stop circuits), a relay with forced-guided contacts (like the CM-EFS series) must be used.

• The R3300​ suffix in the part number specifically indicates a 230V AC coil. For other coil voltages (e.g., 24V DC, 110V AC), a different suffix/part number is required.

Note: Specifications are for product identification and comparison. For detailed load curves, derating factors, and accessory information, consult the official ABB CM-EFN Series Auxiliary Relays Catalog (1SVC440150R0201).