2CDS200985R0042 ABB S3C-UA 24 Undervoltage Release 24 V AC/DC

Why Choose the ABB S3C-UA 24 Undervoltage Release?

The ABB S3C-UA 24 is a 24 V AC/DC undervoltage release (UVR) designed to trip compatible ABB modular protection devices when the monitored control voltage falls below the required operating level or is disconnected. Identified by ABB order code 2CDS200985R0042, it forms part of ABB's MCB accessories portfolio and System pro M compact accessory range.

Designed for professional protection and control applications, the S3C-UA 24 can be used to implement functions such as undervoltage tripping and emergency-stop control with compatible System pro M compact devices. Loss of the control supply causes the associated protection device to trip, providing positive-safety behaviour for appropriately designed electrical control circuits.

The S3C-UA 24 operates from a rated control supply of 24 V AC/DC and occupies only one DIN module with a width of 17.4 mm. It is designed for right-side mounting on compatible ABB modular protection equipment and can be used across a broad range of ABB MCB, RCCB, RCBO and switch-disconnector applications.

Key Advantages

• Provides undervoltage tripping for compatible ABB modular protection devices.
• 24 V AC/DC rated control voltage supports both AC and DC control circuits.
• Suitable for implementing appropriately designed emergency-stop control circuits.
• Compact 17.4 mm width occupies only one modular spacing.
• Designed for straightforward right-side mounting on compatible devices.
• Compatible with a wide selection of ABB System pro M compact circuit protection equipment.

Key Features

• ABB S3C-UA undervoltage release.
• Rated control voltage: 24 V AC/DC.
• Designed to trip the associated device following loss or sufficient reduction of the control voltage.
• Suitable for positive-safety control applications.
• Can support emergency-stop functions in correctly designed control circuits.
• Right-side mounting on compatible modular protection devices.
• One-module width of 17.4 mm.
• Compatible with multiple ABB S200, F200 and DS-series protection devices.
• Selected compact ABB devices can be connected using the appropriate interface module.
• ABB order code 2CDS200985R0042.

Reliable Undervoltage Protection and Control

An undervoltage release provides voltage-dependent tripping of an associated protective or switching device. When the control supply falls below the operating threshold or is removed, the release causes the associated device to open, making this type of accessory useful where continued operation following loss of control voltage is undesirable.

The ABB S3C-UA 24 combines this functionality with a 24 V AC/DC control supply and compact one-module construction. Its compatibility with a broad selection of System pro M compact devices makes it suitable for professional distribution boards, machinery controls and appropriately engineered emergency switching circuits.

Typical Applications

• Undervoltage protection in electrical distribution boards.
• Emergency-stop control circuits.
• Machinery and equipment control systems.
• ABB System pro M compact protection assemblies.
• Commercial and industrial electrical installations.
• DIN-rail systems requiring tripping following loss of a 24 V AC/DC control supply.