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2CDS200985R0044 ABB S3C-UA 110 Undervoltage Release 110 V AC/DC
ABB S3C-UA 110 is a 110 V AC/DC undervoltage release with positive-safety tripping and LED event indication for compatible ABB modular circuit protection devices.
£56.28
Why Choose the ABB S3C-UA 110 Undervoltage Release?
The ABB S3C-UA 110 is an undervoltage release designed for compatible ABB modular circuit protection devices. Operating at a rated voltage of 110 V AC/DC, it trips the associated protection device when the control voltage falls below the specified operating range, helping protect connected equipment during significant supply-voltage reductions.
The S3C-UA 110 provides positive-safety operation, meaning the associated protection device trips when the control voltage is disconnected. This operating principle also allows the accessory to be incorporated into appropriately designed emergency-stop circuits using an external control button.
An integrated LED indication function identifies when an undervoltage event has occurred. The S3C-UA family is suitable for compatible ABB MCBs, RCCBs, RCBOs and switch-disconnectors, with interface modules available for selected additional device ranges.
Key Advantages
- 110 V AC/DC rated operation for AC or DC control circuits.
- Automatically trips the associated device during excessive voltage reduction.
- Positive-safety function trips the device if control voltage is disconnected.
- Can support appropriately designed emergency-stop applications.
- Integrated LED indication shows when an undervoltage event has occurred.
- Compatible with a broad selection of ABB modular circuit protection equipment.
Key Features
- ABB S3C-UA undervoltage release series.
- 110 V AC/DC rated voltage.
- 50–60 Hz AC operating frequency.
- Release range between approximately 35% and 70% of rated voltage.
- Power consumption of approximately 0.94 VA DC and 1.73 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 monitored control supply falls below an acceptable level. ABB specifies the S3C-UA operating region between approximately 70% and 35% of rated voltage, helping prevent continued operation under significant undervoltage conditions.
The ABB S3C-UA 110 also provides positive-safety behaviour by tripping when the control voltage is removed completely. Combined with its 110 V AC/DC rating and LED event indication, this makes it suitable for industrial control, distribution and appropriately designed emergency-stop circuits.
Typical Applications
- Undervoltage protection circuits.
- Emergency-stop control arrangements.
- Electrical distribution boards.
- Commercial and industrial switchboards.
- Machinery and automation control panels.
- Remote tripping based on loss of a 110 V AC/DC control supply.
Technical Specifications
| Series | S3C-UA |
|---|---|
| Order code | 2CDS200985R0044 |
| EAN | 4053546159431 |
| Product type | Undervoltage release |
| Rated voltage | 110 V AC/DC |
| Frequency | 50–60 Hz |
| Release range | 0.35–0.70 × Un |
| DC consumption | approx. 0.94 VA |
| AC consumption | approx. 1.73 VA |
| Terminal capacity | 1 × 0.75–2.5 mm² or 2 × up to 1.5 mm² each |
| 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 110 used for?
The S3C-UA 110 is an undervoltage release that trips a compatible ABB protection device when its control voltage falls below the specified operating range or is disconnected.
What voltage does the S3C-UA 110 operate at?
The ABB S3C-UA 110 has a rated voltage of 110 V AC/DC, with AC operation at 50–60 Hz.
At what voltage level does the S3C-UA 110 release?
ABB specifies the undervoltage release region between approximately 35% and 70% of the rated voltage.
Does the S3C-UA 110 provide undervoltage indication?
Yes. The S3C-UA series incorporates an LED function to indicate that an undervoltage event has occurred.
Can the S3C-UA 110 be used for emergency stopping?
Yes. Its positive-safety operating principle allows the S3C-UA 110 to be incorporated into an appropriately designed emergency-stop circuit using a suitable external control button.
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 electrical distribution applications.
