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1SDA104949R1 ABB YU-C XT5 W 48–60 V AC/DC Undervoltage Release
ABB 1SDA104949R1 YU-C XT5 W is a wired 48–60 V AC/DC undervoltage release designed for compatible withdrawable ABB SACE Tmax XT5 circuit breakers.
£128.03
Why Choose the ABB YU-C XT5 W 48–60 V AC/DC Undervoltage Release?
The ABB YU-C XT5 W 48–60 V AC/DC, order code 1SDA104949R1, is a wired undervoltage release (UVR) designed for compatible ABB SACE Tmax XT5 withdrawable moulded-case circuit breakers. It provides an electrically operated undervoltage protection function, opening the circuit breaker when the auxiliary control supply falls below the required operating level.
As part of the ABB Tmax XT accessory system, the YU-C helps provide fail-safe circuit-breaker control in applications where loss or significant reduction of control voltage must result in circuit interruption. With the undervoltage release de-energised, the associated breaker cannot normally be closed, helping prevent unintended energisation until the control supply has recovered sufficiently.
This specific version is designed for withdrawable (W) XT5 circuit breakers and operates from a 48–60 V AC or 48–60 V DC control supply. Its wired configuration and AC/DC voltage compatibility make it suitable for industrial switchboards, machinery and automated power distribution systems requiring dependable undervoltage-operated breaker control.
Key Advantages
- Dedicated undervoltage release for ABB SACE Tmax XT5 circuit breakers.
- 48–60 V AC/DC control voltage range for industrial control systems.
- Specifically designed for withdrawable (W) XT5 configurations.
- Provides automatic breaker opening following significant control-voltage reduction or loss.
- Helps prevent breaker closing while the undervoltage release is insufficiently energised.
- Genuine ABB accessory engineered for the Tmax XT circuit-breaker platform.
Key Features
- ABB YU-C wired undervoltage release.
- Designed for the SACE Tmax XT5 frame.
- 48–60 V AC rated voltage range.
- 48–60 V DC rated voltage range.
- AC/DC actuating voltage compatibility.
- For withdrawable XT5 circuit breakers.
- Undervoltage-operated circuit-breaker opening function.
- Compliant with applicable IEC 60947-2 and UL 489 standards.
- ABB order code 1SDA104949R1.
Reliable Undervoltage Protection for Circuit Breaker Control
An undervoltage release acts on the circuit-breaker mechanism when its auxiliary supply voltage falls below the required operating threshold. This function is useful in installations where equipment must be disconnected following loss of control power or a significant undervoltage condition.
The ABB YU-C 1SDA104949R1 is engineered specifically for withdrawable Tmax XT5 circuit breakers. Its 48–60 V AC/DC rating provides compatibility with common industrial control supplies, making it suitable for machinery, automation equipment and low-voltage power distribution systems.
Typical Applications
- Industrial low-voltage switchboards.
- Withdrawable ABB Tmax XT5 circuit-breaker installations.
- Machinery safety and control systems.
- Automated power distribution equipment.
- Motor control centres and industrial panels.
- Control circuits requiring undervoltage-triggered breaker opening.
Technical Specifications
| Series | SACE Tmax XT |
|---|---|
| Order code | 1SDA104949R1 |
| Product type | Wired undervoltage release |
| Accessory type | Undervoltage release (UVR) |
| Suitable for | ABB Tmax XT5 |
| Breaker configuration | Withdrawable (W) |
| Rated AC voltage | 48–60 V AC |
| Rated DC voltage | 48–60 V DC |
| Voltage type | AC/DC |
| Standards | IEC 60947-2 / UL 489 |
| Net weight | 0.123 kg |
| EAN / GTIN | 8015644070410 |
| Product group | T-Max XT 250 Range |
Frequently Asked Questions
What is the ABB 1SDA104949R1 used for?
It is a wired YU-C undervoltage release designed to provide undervoltage-operated control of compatible ABB SACE Tmax XT5 withdrawable circuit breakers.
Which circuit breaker is the ABB 1SDA104949R1 designed for?
The release is specifically designed for compatible ABB SACE Tmax XT5 withdrawable circuit breakers.
What control voltage does the ABB YU-C 1SDA104949R1 support?
It is rated for a 48–60 V AC or 48–60 V DC control supply.
What does the ABB YU-C undervoltage release do?
The YU-C acts on the circuit-breaker mechanism when its auxiliary control voltage falls below the required operating level, allowing the breaker to open during undervoltage or loss-of-supply conditions.
Is the YU-C 1SDA104949R1 intended for fixed or withdrawable breakers?
This specific YU-C version is designed for withdrawable (W) ABB SACE Tmax XT5 circuit breakers.
Trusted ABB Circuit Breaker Accessories
ABB SACE Tmax XT electrical accessories provide engineered protection, control and operating functions for compatible moulded-case circuit breakers, supporting dependable integration into industrial, commercial and infrastructure power distribution systems.
