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1SDA073703R1 ABB YU E1.2..E6.2 380-400 VAC Undervoltage Release
ABB 1SDA073703R1 YU E1.2..E6.2 is a 380-400 V AC undervoltage release for compatible SACE Emax 2 E1.2, E2.2, E4.2 and E6.2 circuit breakers.
£167.05
Why Choose the ABB YU E1.2..E6.2 380-400 VAC Undervoltage Release?
The ABB YU E1.2..E6.2 380-400 VAC, order code 1SDA073703R1, is an undervoltage release designed for compatible ABB SACE Emax 2 air circuit breakers. Rated for a 380–400 V AC control supply, the YU accessory monitors the presence of its control voltage and provides undervoltage-dependent operation of the associated circuit breaker mechanism.
The YU release is used where breaker operation needs to respond to a loss or significant reduction of control voltage. This makes it suitable for electrical distribution and automation systems where the circuit breaker must not remain closed when the undervoltage release is de-energised below its operating threshold.
The 1SDA073703R1 is designed for ABB SACE Emax 2 E1.2, E2.2, E4.2 and E6.2 circuit breakers and is also listed for compatible ABB SACE Tmax XT7 and XT7M products. Its 380–400 V AC rating makes it particularly suitable for switchboards using higher-voltage AC control circuits.
Key Advantages
- Undervoltage-dependent breaker operation for compatible ABB circuit breakers.
- 380–400 V AC rated operating voltage for higher-voltage AC control circuits.
- Designed as an ABB YU undervoltage release.
- Compatible with E1.2, E2.2, E4.2 and E6.2 SACE Emax 2 frame sizes.
- Supports safety, automation and power-management schemes requiring response to control-voltage loss.
- Also suitable for compatible ABB SACE Tmax XT7 and XT7M circuit breakers.
Key Features
- ABB YU undervoltage release.
- 380–400 V AC rated voltage.
- AC actuating voltage type.
- 380 V AC rated control supply at 50 Hz.
- 380 V AC rated control supply at 60 Hz.
- Compatible with ABB SACE Emax 2 E1.2–E6.2.
- Also suitable for compatible ABB SACE Tmax XT7 and XT7M circuit breakers.
- Non-delayed undervoltage release configuration.
- Suitable for use with power circuit breakers.
- Designed for IEC applications.
Undervoltage Protection for ABB SACE Emax 2 Circuit Breakers
An undervoltage release is used to make circuit breaker operation dependent on the presence of an adequate control voltage. The ABB YU 1SDA073703R1 is designed for a 380–400 V AC supply and acts on the compatible breaker mechanism when the control voltage falls below the release's operating conditions, helping prevent continued closed operation when the required control supply is unavailable.
This functionality is valuable in industrial distribution, automation and power-management systems where defined breaker behaviour during voltage loss is required. As a purpose-designed ABB accessory, the YU release integrates with compatible Emax 2 breaker mechanisms across the E1.2 through E6.2 frame range.
Typical Applications
- Undervoltage-dependent operation of ABB SACE Emax 2 air circuit breakers.
- Industrial low-voltage power distribution switchboards.
- Automated circuit breaker control systems.
- Generator and power-management switchboards.
- Critical electrical systems requiring defined response to control-voltage loss.
- Industrial automation and electrical interlocking schemes.
Technical Specifications
| Product family | SACE Emax 2 electrical accessories |
|---|---|
| Extended compatibility designation | YU E1.2..E6.2-XT7-XT7M 380-400 VAC |
| Order code / Product ID | 1SDA073703R1 |
| ABB product group | Emax2 Air Circuit Breaker |
| Product type | Undervoltage release |
| Accessory designation | YU |
| Function | Undervoltage release |
| Rated voltage | 380–400 V AC |
| Rated control supply voltage, AC 50 Hz | 380 V |
| Rated control supply voltage, AC 60 Hz | 380 V |
| Actuating voltage type | AC |
| Delayed operation | No |
| Suitable for power circuit breakers | Yes |
| Suitable for Emax 2 frames | E1.2, E2.2, E4.2 and E6.2 |
| Additional compatibility | SACE Tmax XT7 and XT7M |
| Standard | IEC |
| EAN / GTIN | 8015644776367 |
Frequently Asked Questions
What is the ABB 1SDA073703R1?
The ABB 1SDA073703R1 is a YU undervoltage release designed for compatible ABB SACE Emax 2 circuit breakers and rated for a 380–400 V AC control supply.
What voltage is the ABB 1SDA073703R1 rated for?
The YU undervoltage release is rated for 380–400 V AC.
Which Emax 2 circuit breakers are compatible with the ABB 1SDA073703R1?
The 1SDA073703R1 is designed for ABB SACE Emax 2 E1.2, E2.2, E4.2 and E6.2 circuit breakers and is also listed for compatible SACE Tmax XT7 and XT7M products.
What does YU mean on an ABB Emax 2 accessory?
YU identifies the ABB undervoltage release, an electrical accessory used to make compatible circuit breaker operation dependent on the presence of the required control voltage.
Does the ABB 1SDA073703R1 operate on AC or DC?
The 1SDA073703R1 is an AC undervoltage release rated for 380–400 V AC; it is not specified as an AC/DC version.
Trusted ABB Circuit Breaker Control Accessories
ABB electrical accessories extend the control and operating capabilities of SACE Emax 2 circuit breakers, enabling undervoltage-dependent operation and integration with industrial automation, switchboard control and power-management systems.
