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2CDS200985R0043 ABB S3C-UA 48 Undervoltage Release 48 V AC/DC
ABB S3C-UA 48 is a 48 V AC/DC undervoltage release with positive-safety tripping and LED event indication for compatible ABB modular circuit protection devices.
£56.12
Why Choose the ABB S3C-UA 48 Undervoltage Release?
The ABB S3C-UA 48 is an undervoltage release designed for compatible ABB modular circuit protection devices. Operating at a rated voltage of 48 V AC/DC, it automatically trips the associated protection device when the supply voltage falls below the specified operating threshold.
The S3C-UA 48 provides positive safety, causing the associated device to trip if the control voltage is disconnected. It can therefore support undervoltage protection as well as emergency-stop functions implemented using a suitable control button.
An integrated LED indication function shows when an undervoltage event has occurred. The release is suitable for compatible ABB S200-series MCBs, F200 RCCBs and selected RCBOs and switch-disconnectors, with interface modules available for additional compatible device families.
Key Advantages
- 48 V AC/DC operation for flexible control-circuit integration.
- Automatically trips the associated device during an excessive voltage drop.
- Positive-safety operation trips the device when control voltage is disconnected.
- Can support emergency-stop applications using an external control button.
- Integrated LED indication identifies an undervoltage event.
- Compatible with a broad range of ABB modular protection equipment.
Key Features
- ABB S3C-UA undervoltage release series.
- 48 V AC/DC rated voltage.
- 50–60 Hz AC operating frequency.
- Undervoltage release threshold between approximately 35% and 70% of rated voltage.
- Power consumption of approximately 1.41 VA DC or 2.27 VA AC.
- LED undervoltage-event indication.
- IPXXB / IP2X protection degree.
- Can be installed in any operating position.
- Designed in accordance with IEC/EN 60947-1.
- Conducted emissions compliant with CISPR 11 Class A.
Automatic Protection Against Loss of Control Voltage
An undervoltage release mechanically trips its associated protection device when the control supply falls below an acceptable level. For the S3C-UA series, ABB specifies operation as the voltage falls within the region between approximately 70% and 35% of the rated value, helping protect equipment from undesirable operation during significant supply-voltage reductions.
The ABB S3C-UA 48 also provides positive-safety behaviour by tripping when its control voltage is removed completely. This functionality makes the release useful not only for undervoltage protection but also for appropriately designed emergency-stop and safety-control circuits.
Typical Applications
- Undervoltage protection circuits.
- Emergency-stop control arrangements.
- Electrical distribution boards.
- Commercial and industrial switchboards.
- Machinery and control panels.
- Remote tripping based on loss of a 48 V AC/DC control supply.
Technical Specifications
| Series | S3C-UA |
|---|---|
| Order code | 2CDS200985R0043 |
| EAN | 4053546159394 |
| Product type | Undervoltage release |
| Rated voltage | 48 V AC/DC |
| Frequency | 50–60 Hz |
| Release threshold | 0.35–0.70 × Un |
| DC consumption | approx. 1.41 VA |
| AC consumption | approx. 2.27 VA |
| Terminal capacity | 1 × 0.75–2.5 mm² or 2 × up to 1.5 mm² |
| Tightening torque | 0.8 Nm |
| Protection degree | IPXXB / IP2X |
| Dimensions (H × D × W) | 85 × 71.1 × 17.4 mm |
| Mounting position | Any |
| Standard | IEC/EN 60947-1 |
| Conducted emissions | CISPR 11 Class A compliant |
| Weight | approx. 0.09 kg |
| Pack quantity | 1 piece |
| Product group | MCB Accessories |
Frequently Asked Questions
What is the ABB S3C-UA 48 used for?
The S3C-UA 48 is an undervoltage release that trips a compatible ABB protection device when its control voltage falls below the specified threshold or is disconnected.
What voltage does the S3C-UA 48 operate at?
The ABB S3C-UA 48 has a rated operating voltage of 48 V AC/DC, with AC operation at 50–60 Hz.
At what voltage level does the S3C-UA 48 trip?
ABB specifies the undervoltage release region between approximately 35% and 70% of the rated voltage.
Can the S3C-UA 48 be used for emergency stopping?
Yes. Its positive-safety undervoltage-release function allows it to be incorporated into appropriately designed emergency-stop circuits using a suitable external button or control circuit.
Which ABB devices can use the S3C-UA series?
The S3C-UA series is suitable for compatible S200-series MCBs, F200 RCCBs, DS202C and DSE201M RCBOs and SD200 switch-disconnectors; selected additional ABB devices can use the release through the appropriate interface module.
Trusted ABB Modular Protection Accessories
ABB S3C-UA undervoltage releases provide automatic voltage-loss protection and positive-safety tripping for compatible modular protection devices, supporting dependable control and distribution applications.
