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1SDA038312R1 ABB Under Voltage Release 220–240 V AC/DC E1/6-T8
ABB 1SDA038312R1 is a 220–240 V AC/DC under voltage release for voltage-dependent tripping of compatible SACE Emax E1, E2, E3, E4 and E6 and SACE Tmax T8 circuit breakers.
£461.06
Why Choose the ABB 1SDA038312R1 Under Voltage Release?
The ABB 1SDA038312R1 is a dependable under voltage release (YU) designed for voltage-dependent tripping of compatible ABB circuit breakers. As part of the ABB SACE Emax accessory range, it enables the circuit breaker to open when the release supply voltage falls below the required operating level, supporting safe and controlled operation of low-voltage electrical systems.
This under voltage release has a rated voltage of 220–240 V AC/DC and is suitable for ABB E1, E2, E3, E4, E6 and T8 circuit breakers. Its AC/DC capability provides flexible integration into industrial switchboards, distribution panels and automation systems where circuit breaker operation must respond to loss or reduction of the control supply.
Unlike a shunt opening release, which operates when an electrical trip command is applied, the under voltage release is energised during normal operation and acts on the breaker mechanism if its supply voltage falls sufficiently. The 1SDA038312R1 is therefore well suited to installations requiring automatic disconnection and protection against unintended operation following loss of control voltage.
Key Advantages
- Genuine ABB under voltage release (YU) for circuit breaker control and protection.
- 220–240 V AC/DC rated voltage for industrial control systems.
- Compatible with ABB E1, E2, E3, E4, E6 and T8 circuit breakers.
- Suitable for SACE Emax and SACE Tmax T product classes.
- Provides voltage-dependent breaker opening when the control supply falls sufficiently.
- AC/DC operation offers flexible integration into switchboards and automation systems.
Key Features
- ABB SACE Emax under voltage release.
- 220–240 V AC/DC rated voltage.
- Under voltage release designation YU.
- Suitable for E1, E2, E3, E4, E6 and T8 circuit breakers.
- Compatible with SACE Emax and SACE Tmax T circuit breaker systems.
- Designed for voltage-dependent circuit breaker tripping.
- Loose or configurable accessory configuration.
- IEC-compliant circuit breaker accessory.
Reliable Under Voltage Circuit Breaker Protection
An under voltage release provides voltage-dependent control of a circuit breaker. During normal operation the release is energised by its control supply; if the voltage falls sufficiently, the release acts on the circuit breaker mechanism and causes the breaker to open. This helps prevent equipment from remaining connected or restarting unexpectedly following an unacceptable loss of control voltage.
The ABB 1SDA038312R1 provides this functionality with a 220–240 V AC/DC rated supply and is designed for use across multiple SACE Emax breaker sizes as well as the compatible Tmax T8. It is particularly useful in switchboards and automated installations where loss of control voltage must initiate circuit breaker opening.
Typical Applications
- Low-voltage switchboards and distribution panels.
- Under voltage protection and control circuits.
- Industrial power distribution installations.
- Automatic circuit breaker tripping systems.
- Process control and industrial automation systems.
- ABB SACE Emax air circuit breaker installations.
- ABB SACE Tmax T8 circuit breaker installations.
Technical Specifications
| Series | SACE Emax Accessories |
|---|---|
| Product group | New Emax |
| Product type | Under voltage release |
| Release designation | YU |
| Function | Voltage-dependent circuit breaker opening |
| Rated voltage | 220–240 V AC/DC |
| Current type | AC/DC |
| Suitable for | E1, E2, E3, E4, E6, T8 |
| Suitable product classes | SACE Emax, SACE Tmax T |
| Configuration type | Loose or configurable |
| Standard | IEC |
| ETIM classification | EC001022 – Under voltage coil |
| Dimensions (H × W × D) | 70 × 50 × 80 mm |
| Product net weight | 1 kg |
| EAN | 8015644383121 |
| Customs tariff number | 85389099 |
Frequently Asked Questions
What is the ABB 1SDA038312R1 used for?
The ABB 1SDA038312R1 is an under voltage release used to provide voltage-dependent tripping of compatible ABB circuit breakers when the release supply voltage falls below the required operating level.
What voltage is the ABB 1SDA038312R1 rated for?
The under voltage release has a rated voltage of 220–240 V AC/DC.
Which ABB circuit breakers are compatible with the 1SDA038312R1?
The 1SDA038312R1 is suitable for ABB E1, E2, E3, E4, E6 and T8 circuit breakers within the SACE Emax and SACE Tmax T product classes.
Can the ABB 1SDA038312R1 operate with both AC and DC supplies?
Yes. The release is rated for 220–240 V AC/DC, allowing use with compatible AC or DC control supplies within its specified voltage range.
What is the difference between an under voltage release and a shunt opening release?
An under voltage release causes the circuit breaker to open when its control supply falls sufficiently, whereas a shunt opening release trips the breaker when an external electrical opening command energises the release.
Trusted ABB Circuit Breaker Accessories
ABB SACE Emax accessories provide dependable control and protection functions for low-voltage circuit breakers, supporting reliable integration into industrial switchboards, power distribution networks and automated electrical systems.
