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1sda054218r1 t4h 250 tmd 50-500 4 pole abb mccb
ABB 1SDA054218R1 SACE Tmax T4H 250 fixed four-pole moulded case circuit breaker with 50 A thermal magnetic TMD release and front terminals for industrial power distribution.
£1,302.29
Why Choose the ABB 1SDA054218R1 Tmax T4H Moulded Case Circuit Breaker?
The ABB 1SDA054218R1 is a high-performance Tmax T4H moulded case circuit breaker (MCCB) designed to protect industrial and commercial low voltage electrical systems against overloads and short circuits. As part of the proven ABB SACE Tmax T series, it provides dependable circuit protection, high breaking capacity and compact installation for demanding power distribution applications.
This model features a 250 A frame size with a 50 A thermal magnetic TMD release. Its fixed four-pole configuration with front terminal connections makes it suitable for three-phase systems requiring neutral isolation in switchboards, distribution panels, motor control centres and OEM machinery.
Designed for reliable performance in accordance with IEC 60947, the ABB Tmax T4H range is trusted by electrical engineers, panel builders and industrial contractors for robust protection, long operational life and excellent fault interruption capability.
Key Advantages
- High-performance ABB SACE Tmax T4H moulded case circuit breaker.
- 50 A thermal magnetic TMD trip unit within a 250 A frame.
- Fixed four-pole construction for industrial power distribution.
- High short-circuit breaking capacity for demanding installations.
- Front terminal connections for practical panel installation.
- Reliable overload and short-circuit protection.
Key Features
- Manufacturer: ABB.
- Series: SACE Tmax T.
- Model: T4H 250 TMD 50-500 4P F F.
- Product ID: 1SDA054218R1.
- 50 A rated current.
- 250 A frame size.
- Thermal magnetic TMD release.
- Fixed four-pole configuration.
- Front terminal connections.
- Rated operational voltage up to 690 V AC.
Reliable Protection for Industrial Power Distribution
The ABB Tmax T4H series is engineered to protect low voltage electrical circuits by disconnecting power during overload and short-circuit conditions. Its high interrupting capacity and durable construction make it suitable for demanding industrial environments where safety and continuity of service are essential.
The four-pole design allows all live conductors, including the neutral, to be isolated where required. Combined with the thermal magnetic TMD release, this provides practical and dependable protection for industrial distribution systems and commercial electrical installations.
Typical Applications
- Industrial switchboards.
- Commercial power distribution systems.
- Motor control centres.
- OEM machinery and automation equipment.
- Electrical distribution panels.
- Three-phase systems requiring neutral isolation.
Technical Specifications
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| Current | 50 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | MCCB | |
| Breaking Capacity | 100 kA | |
| Trip Unit | Thermal-magnetic | |
| Manufacturer | ABB | |
| Series | SACE Tmax T | |
| Product ID | 1SDA054218R1 | |
| Extended product type | T4H 250 TMD 50-500 4P F F | |
| Product type | Moulded Case Circuit Breaker (MCCB) | |
| Frame size | T4H 250 | |
| Rated current (In) | 50 A | |
| Rated uninterrupted current (Iu) | 250 A | |
| Release type | Thermal Magnetic (TMD) | |
| Magnetic setting range | 250-500 A | |
| Number of poles | 4 | |
| Rated operational voltage | 690 V AC / 750 V DC | |
| Rated insulation voltage (Ui) | 1000 V | |
| Rated impulse withstand voltage (Uimp) | 8 kV | |
| Rated ultimate short-circuit breaking capacity (Icu) | Up to 100 kA at 230 V AC | |
| Rated ultimate short-circuit breaking capacity at 415 V AC | 70 kA | |
| Short-circuit performance level | H | |
| Terminal type | Front terminals | |
| Mounting | Fixed | |
| Electrical durability | 8,000 cycles | |
| Mechanical durability | 20,000 cycles | |
| Dimensions (H × W × D) | Approx. 205 × 140 × 103.5 mm | |
| Weight | Approx. 3.05 kg | |
| Standards | IEC 60947 |
Frequently Asked Questions
What is the ABB 1SDA054218R1 used for?
It provides overload and short-circuit protection for industrial and commercial low voltage electrical distribution systems.
How many poles does this circuit breaker have?
The ABB 1SDA054218R1 is supplied as a fixed four-pole moulded case circuit breaker.
What current rating does this breaker provide?
This breaker features a 50 A thermal magnetic TMD trip unit within a 250 A Tmax T4H frame.
What type of trip unit is fitted?
The breaker uses a thermal magnetic TMD release providing dependable overload and short-circuit protection.
Where is this MCCB typically installed?
It is commonly installed in industrial switchboards, distribution panels, motor control centres, OEM machinery and commercial electrical systems.
Trusted by Electrical Professionals Worldwide
ABB SACE Tmax moulded case circuit breakers are trusted worldwide by electrical engineers, panel builders and OEM manufacturers for dependable protection, high interrupting performance and long-term operational reliability.
