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1SDA104942R1 ABB YU XT5-XT6 48–60V AC/DC Undervoltage Release
ABB 1SDA104942R1 is an uncabled 48–60 V AC/DC undervoltage release designed for compatible fixed and plug-in ABB SACE Tmax XT5 and XT6 circuit breakers.
£112.54
Why Choose the ABB 1SDA104942R1 YU XT5-XT6 48–60V AC/DC Undervoltage Release?
The ABB 1SDA104942R1 is a genuine undervoltage release (UVR) designed for ABB SACE Tmax XT5 and XT6 moulded case circuit breakers. Identified as YU XT5-XT6 48...60 Vac/dc, it provides an electrical protection and control function by causing the associated circuit breaker to open when the control supply falls below the required operating level.
Designed for a rated control supply of 48–60 V AC/DC, the 1SDA104942R1 is suitable for both AC and DC control circuits. The YU undervoltage release provides fail-safe functionality for applications where a significant reduction or loss of control voltage must result in circuit-breaker opening.
As part of the ABB SACE Tmax XT electrical accessory range, this uncabled undervoltage release is compatible with both XT5 and XT6 frame sizes in fixed and plug-in configurations. Its manufacturer-matched design makes it suitable for industrial switchboards, machinery systems, automated power distribution and other applications requiring dependable undervoltage protection.
Key Advantages
- Genuine ABB undervoltage release for SACE Tmax XT circuit breakers.
- Compatible with both ABB XT5 and XT6 frame sizes.
- Wide 48–60 V AC/DC rated control voltage range.
- Supports automatic circuit-breaker opening following significant loss or reduction of the control supply.
- Helps provide fail-safe circuit-breaker control in critical applications.
- Suitable for industrial switchboards, machinery protection and automated power distribution systems.
Key Features
- ABB SACE Tmax XT accessory range.
- YU XT5-XT6 48...60 Vac/dc extended product type.
- Undervoltage release (UVR).
- Compatible with XT5 and XT6 circuit breakers.
- 48–60 V AC rated voltage range.
- 48–60 V DC rated voltage range.
- AC/DC operating capability.
- Uncabled version for fixed and plug-in configurations.
Fail-Safe Undervoltage Protection for ABB Tmax XT5 and XT6
An undervoltage release monitors its auxiliary control supply and interacts with the circuit-breaker operating mechanism. If the control voltage falls sufficiently below the required level or disappears completely, the release causes the associated circuit breaker to open, helping protect equipment and processes where continued operation following loss of control power is undesirable.
The ABB 1SDA104942R1 provides this functionality across a 48–60 V AC/DC control range and is designed for compatible XT5 and XT6 fixed or plug-in circuit breakers. It provides a manufacturer-matched solution for fail-safe control, machinery protection and automated low-voltage distribution systems.
Typical Applications
- ABB SACE Tmax XT5 moulded case circuit breakers.
- ABB SACE Tmax XT6 moulded case circuit breakers.
- Fixed and plug-in XT5 / XT6 installations.
- Undervoltage protection and fail-safe circuit isolation.
- Industrial low-voltage switchboards.
- Machinery and automation control systems.
- Automated power distribution systems.
- OEM switchgear and panel-building applications.
Technical Specifications
| Series | SACE Tmax XT |
|---|---|
| Product group | T-Max XT 250 Range |
| Order code / MPN | 1SDA104942R1 |
| Product type | Undervoltage release (UVR) |
| Configuration | Uncabled |
| Compatible frame sizes | XT5 / XT6 |
| Circuit-breaker configurations | Fixed / plug-in |
| Rated AC voltage | 48–60 V AC |
| Rated DC voltage | 48–60 V DC |
| Control voltage type | AC/DC |
| Function | Undervoltage release for circuit-breaker opening on loss or significant reduction of control voltage |
| Reference standards | IEC 60947-2 / UL 489 |
| RoHS compliance | EU Directive 2011/65/EU and amendment 2015/863 |
| Net weight | 0.123 kg |
Frequently Asked Questions
What is the ABB 1SDA104942R1 used for?
The ABB 1SDA104942R1 is an undervoltage release used with compatible ABB SACE Tmax XT5 and XT6 circuit breakers to initiate opening when the auxiliary control voltage falls sufficiently below the required operating level.
Which ABB circuit breakers are compatible with the 1SDA104942R1?
The 1SDA104942R1 is designed for compatible ABB SACE Tmax XT5 and XT6 circuit breakers in fixed and plug-in configurations.
What control voltage does the ABB 1SDA104942R1 accept?
The YU undervoltage release is rated for 48–60 V AC and 48–60 V DC control supplies.
What happens if the YU undervoltage release loses its control supply?
If the control supply is lost or falls sufficiently below its operating level, the undervoltage release causes the associated circuit breaker to open, providing fail-safe operation for the protected installation.
Is the ABB 1SDA104942R1 a wired undervoltage release?
No. The 1SDA104942R1 is the uncabled YU version for compatible fixed and plug-in XT5 and XT6 circuit breakers.
Trusted ABB Components for Electrical Distribution
ABB SACE Tmax XT undervoltage releases provide dependable fail-safe circuit-breaker control for industrial switchboards, machinery systems and professional low-voltage power distribution applications.
