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1SDA054245R1 ABB T4V 250 TMD 50-500 50 A 3-Pole MCCB
ABB 1SDA054245R1 T4V 250 TMD 50-500 is a 50 A three-pole fixed moulded case circuit breaker with front terminals, thermomagnetic protection and a 200 kA ultimate short-circuit breaking capacity at 380–415 V AC.
£1,244.06
Why Choose the ABB T4V 250 TMD 50-500 Circuit Breaker?
The ABB T4V 250 TMD 50-500, order code 1SDA054245R1, is a high-performance 3-pole moulded case circuit breaker (MCCB) designed for protection and switching in low-voltage electrical distribution systems. As part of the proven ABB Tmax T4 series, it combines the T4V 250 frame with a 50 A TMD thermomagnetic release for reliable protection of industrial and commercial power circuits.
The TMD thermomagnetic trip unit provides thermal overload and magnetic short-circuit protection without requiring an external power supply. Its thermal protection is adjustable from 0.7 to 1 times the rated current, while this configuration uses a 500 A fixed magnetic trip setting for rapid interruption of high short-circuit currents.
With a rated current of 50 A and an ultimate short-circuit breaking capacity of 200 kA at 380–415 V AC, the T4V 250 offers exceptionally high fault-current interruption capability. This configuration is a 3-pole fixed circuit breaker with front terminals, making it suitable for permanent installation in switchboards, distribution panels and industrial control assemblies.
Key Advantages
- High-performance ABB Tmax T4 moulded case circuit breaker.
- 50 A rated current for industrial and commercial distribution circuits.
- 200 kA ultimate breaking capacity at 380–415 V AC for very high prospective fault currents.
- TMD thermomagnetic release provides overload and short-circuit protection.
- Adjustable thermal protection from 0.7–1 × In.
- 500 A fixed magnetic trip for rapid short-circuit protection.
- Compact 3-pole fixed construction with front terminals for straightforward switchboard integration.
Key Features
- ABB Tmax T4V 250 circuit breaker.
- 50 A rated current.
- 3-pole configuration.
- Fixed mounting execution.
- Front terminals.
- TMD thermomagnetic trip unit.
- Adjustable thermal overload protection.
- 500 A fixed magnetic short-circuit trip.
- 200 kA Icu at 380–415 V AC.
- Compact construction for low-voltage switchboards and distribution panels.
High-Performance Thermomagnetic Circuit Protection
Moulded case circuit breakers such as the ABB Tmax T4 protect electrical installations by automatically interrupting excessive currents caused by overloads and short circuits. The T4V performance level provides very high short-circuit interruption capability, making this breaker particularly suitable for installations with substantial prospective fault currents.
The TMD release combines adjustable thermal overload protection with a fixed magnetic short-circuit trip. This established thermomagnetic protection principle operates without auxiliary power and provides a straightforward, dependable solution for protecting cables, distribution circuits and connected electrical equipment.
Typical Applications
- Industrial low-voltage distribution boards.
- Main and feeder circuit protection.
- Commercial electrical distribution systems.
- Manufacturing and process plant equipment.
- Machinery and automation power circuits.
- Infrastructure and building services switchboards.
- Installations with high prospective short-circuit currents.
Technical Specifications
| Series | Tmax T4 |
|---|---|
| ABB order code | 1SDA054245R1 |
| EAN | 8015644553425 |
| Product type | Moulded case circuit breaker (MCCB) |
| Frame | T4 |
| Performance level | V |
| Frame rated uninterrupted current (Iu) | 250 A |
| Rated current (In) | 50 A |
| Trip unit | TMD thermomagnetic |
| Thermal protection setting | 0.7–1 × In |
| Magnetic trip setting | 500 A |
| Number of poles | 3 |
| Ultimate short-circuit breaking capacity (Icu) at 220–230 V AC | 200 kA |
| Ultimate short-circuit breaking capacity (Icu) at 380–415 V AC | 200 kA |
| Ultimate short-circuit breaking capacity (Icu) at 440 V AC | 180 kA |
| Ultimate short-circuit breaking capacity (Icu) at 500 V AC | 150 kA |
| Ultimate short-circuit breaking capacity (Icu) at 690 V AC | 80 kA |
| Mounting | Fixed |
| Terminal arrangement | Front terminals |
| Dimensions (H × W × D) | 205 × 105 × 103.5 mm |
| Net weight | approx. 2.35 kg |
| Mechanical durability | 20,000 operations |
| Electrical durability | 8,000 operations |
Frequently Asked Questions
What is the ABB 1SDA054245R1?
The ABB 1SDA054245R1 is a Tmax T4V 250 fixed 3-pole moulded case circuit breaker with front terminals and a TMD 50-500 A thermomagnetic release.
What is the rated current of this circuit breaker?
This T4V 250 configuration has a rated current of 50 A, within a T4 frame rated for an uninterrupted current of 250 A.
What protection does the TMD trip unit provide?
The TMD trip unit provides thermal overload and magnetic short-circuit protection, with adjustable thermal protection and a fixed 500 A magnetic trip setting.
What is the breaking capacity of the ABB T4V 250?
This configuration provides an ultimate short-circuit breaking capacity of 200 kA at 380–415 V AC, with the available breaking capacity varying according to operating voltage.
Where is the ABB T4V 250 TMD typically used?
It is typically installed in industrial and commercial low-voltage switchboards, machinery and distribution panels requiring reliable thermomagnetic protection and very high short-circuit breaking performance.
Trusted ABB Circuit Protection
ABB Tmax moulded case circuit breakers are widely used in industrial and commercial electrical distribution systems, providing dependable switching, overload protection and high-performance short-circuit protection for demanding low-voltage installations.
