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1SDA104941R1 ABB YU XT5-XT6 24–30V AC/DC Undervoltage Release
ABB 1SDA104941R1 is a non-wired 24–30 V AC/DC undervoltage release designed for compatible ABB SACE Tmax XT5 and XT6 circuit breakers.
£118.17
Why Choose the ABB 1SDA104941R1 YU XT5-XT6 24–30V AC/DC Undervoltage Release?
The ABB 1SDA104941R1 is a genuine undervoltage release (UVR) designed for ABB SACE Tmax XT5 and XT6 moulded case circuit breakers. Identified as YU XT5-XT6 24...30 Vac/dc, it provides an electrical protection and control function by causing the associated circuit breaker to open when its control supply falls below the required operating level.
Designed for a rated control supply of 24–30 V AC/DC, the 1SDA104941R1 is suitable for both AC and DC control circuits. The YU undervoltage release also prevents the associated circuit breaker from being closed while the release is insufficiently energised, helping provide fail-safe operation in applications where loss or significant reduction of the control voltage must result in circuit isolation.
As part of the ABB SACE Tmax XT electrical accessory range, this non-wired undervoltage release is compatible with both XT5 and XT6 frame sizes. 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 24–30 V AC/DC rated control voltage range.
- Causes the circuit breaker to open following significant loss or reduction of the auxiliary supply.
- Prevents circuit-breaker closing when the undervoltage release is not sufficiently energised.
- Suitable for fail-safe control, machinery protection and automated power distribution applications.
Key Features
- ABB SACE Tmax XT accessory range.
- YU XT5-XT6 24...30 Vac/dc extended product type.
- Undervoltage release (UVR).
- Compatible with XT5 and XT6 circuit breakers.
- 24–30 V AC rated voltage range.
- 24–30 V DC rated voltage range.
- AC/DC operating capability.
- Non-wired version.
Fail-Safe Undervoltage Protection for ABB Tmax XT5 and XT6
An undervoltage release continuously monitors its auxiliary control supply and interacts mechanically with the circuit breaker. If the supply voltage falls sufficiently below its normal level or disappears completely, the release causes the circuit breaker to open. The breaker cannot be closed while the undervoltage release remains insufficiently energised, providing a useful fail-safe function for machinery and electrical distribution systems.
The ABB 1SDA104941R1 provides this function across a 24–30 V AC/DC control range and is designed for compatible XT5 and XT6 circuit breakers. This makes it suitable for installations where loss of auxiliary power must result in automatic circuit interruption and where automatic reconnection following an undervoltage condition is undesirable.
Typical Applications
- ABB SACE Tmax XT5 moulded case circuit breakers.
- ABB SACE Tmax XT6 moulded case circuit breakers.
- Undervoltage protection and fail-safe circuit isolation.
- Industrial low-voltage switchboards.
- Machinery and automation control systems.
- Emergency and safety control circuits.
- 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 | 1SDA104941R1 |
| Alternate catalogue number | KXTFYU1 |
| Product type | Undervoltage release (UVR) |
| Product main type | Accessories - Electrical and Auxiliary Contacts |
| Compatible frame sizes | XT5 / XT6 |
| Configuration | Non-wired |
| Rated AC voltage | 24–30 V AC |
| Rated DC voltage | 24–30 V DC |
| Control voltage type | AC/DC |
| Function | Undervoltage release / circuit-breaker opening on loss or reduction of control voltage |
| Reference standards | IEC 60947-2 / UL 489 |
| Certification | IEC / UL |
| RoHS compliance | EU Directive 2011/65/EU and amendment 2015/863 |
| Net weight | 0.109 kg |
| EAN / UPC | 8015644070335 |
Frequently Asked Questions
What is the ABB 1SDA104941R1 used for?
The ABB 1SDA104941R1 is an undervoltage release used with compatible ABB SACE Tmax XT5 and XT6 circuit breakers to initiate opening when the auxiliary control voltage falls below the required operating level.
Which ABB circuit breakers are compatible with the 1SDA104941R1?
The 1SDA104941R1 is designed for compatible ABB SACE Tmax XT5 and XT6 circuit breakers.
What control voltage does the ABB 1SDA104941R1 accept?
The YU undervoltage release is rated for 24–30 V AC and 24–30 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 circuit breaker to open. The breaker cannot be closed while the release remains insufficiently energised.
Is the ABB 1SDA104941R1 a wired undervoltage release?
No. The 1SDA104941R1 is the non-wired YU version for compatible 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.
