Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
1SDA056376R1 ABB E3H1250 PR121/P-LI 1250 A 4-Pole Fixed Air Circuit Breaker
ABB 1SDA056376R1 E3H1250 is a 1250 A four-pole fixed SACE Emax air circuit breaker with a PR121/P-LI electronic overcurrent release, rear horizontal terminals and up to 100 kA ultimate short-circuit breaking capacity for demanding low-voltage power distribution.
£11,342.99
Why Choose the ABB 1SDA056376R1 E3H1250 Air Circuit Breaker?
The ABB 1SDA056376R1 is a high-performance SACE Emax E3H air circuit breaker (ACB) designed for protection and switching in demanding low-voltage electrical distribution systems. As part of the ABB New Emax E3 series, this four-pole fixed circuit breaker combines a 1250 A rated current with the PR121/P-LI electronic overcurrent release for dependable protection of industrial, commercial and infrastructure power installations.
The E3H1250 is equipped with ABB's PR121/P-LI R1250 electronic trip unit, providing long-time overload and instantaneous short-circuit protection. This LI protection configuration provides essential electronic overcurrent protection, while the four-pole construction enables switching across three phase conductors and the neutral conductor in compatible three-phase four-wire distribution systems.
With a 1250 A rated uninterrupted current, four-pole fixed construction and rear horizontal terminals, the 1SDA056376R1 is engineered for permanent integration into low-voltage switchboards. The E3H performance level provides an ultimate short-circuit breaking capacity of 100 kA up to 500 V AC and 85 kA at 660–690 V AC, making it suitable for installations with substantial prospective fault currents.
Key Advantages
- High-performance ABB SACE Emax E3H air circuit breaker for demanding low-voltage distribution.
- 1250 A rated uninterrupted current for high-current industrial, commercial and infrastructure applications.
- PR121/P-LI electronic overcurrent release for long-time overload and instantaneous short-circuit protection.
- Four-pole construction supports three-phase distribution systems requiring neutral switching.
- Ultimate short-circuit breaking capacity of up to 100 kA for high-fault-level installations.
- Fixed mounting configuration for permanent integration into compatible low-voltage switchboards.
- Rear horizontal terminals provide a practical arrangement for switchboard busbar and conductor connections.
- Four auxiliary contacts with open/closed position indication support circuit-breaker monitoring and control.
Key Features
- ABB SACE Emax E3H1250 series air circuit breaker.
- 1250 A rated uninterrupted current.
- Four-pole configuration.
- Fixed circuit-breaker version.
- Rear horizontal terminals.
- PR121/P-LI R1250 electronic overcurrent release.
- LI protection covering long-time overload and instantaneous short-circuit protection.
- Rated operational voltage up to 690 V AC.
- Rated insulation voltage of 1000 V.
- Rated impulse withstand voltage of 12 kV.
- Ultimate short-circuit breaking capacity of up to 100 kA.
- Four auxiliary contacts with circuit-breaker open/closed position indication.
Reliable Protection for High-Current Power Distribution
Air circuit breakers such as the ABB E3H1250 provide switching, isolation and protection for high-current low-voltage distribution systems. The electronic trip unit monitors current conditions and enables the breaker to interrupt overload and short-circuit faults, helping protect busbars, cables, transformers and connected electrical equipment from potentially damaging overcurrents.
The integrated PR121/P-LI electronic trip unit provides long-time overload and instantaneous short-circuit protection. Combined with the E3H breaker's 1250 A current rating, four-pole construction, ultimate breaking capacity of up to 100 kA and fixed configuration, the 1SDA056376R1 is particularly suitable for main distribution circuits requiring dependable protection and high short-circuit performance.
Typical Applications
- Low-voltage main distribution switchboards.
- Industrial power distribution systems.
- Manufacturing and process plants.
- Commercial and large-building electrical distribution.
- Main incomer and high-current feeder protection.
- Three-phase four-wire electrical distribution systems.
- Generator and transformer distribution circuits.
- Power control centres and fixed switchgear assemblies.
- Infrastructure and utility installations with high prospective fault currents.
Technical Specifications
| Product group | 310513-New Emax |
|---|---|
| Series | SACE Emax / New Emax E3 |
| ABB order code | 1SDA056376R1 |
| Product type | Air circuit breaker |
| Frame / performance type | E3H |
| Short-circuit performance level | H |
| Rated current (In) | 1250 A |
| Rated operational current (Ie) | 1250 A |
| Rated uninterrupted current (Iu) | 1250 A |
| Number of poles | 4 |
| Mounting version | Fixed |
| Terminal arrangement | Rear horizontal terminals |
| Trip unit | PR121/P-LI R1250 electronic overcurrent release |
| Release type | Electronic |
| Protection functions | LI – long-time and instantaneous |
| Rated operational voltage | 690 V AC |
| Rated insulation voltage (Ui) | 1000 V |
| Rated impulse withstand voltage (Uimp) | 12 kV |
| Rated ultimate short-circuit breaking capacity (Icu), 220–500 V AC | 100 kA |
| Rated ultimate short-circuit breaking capacity (Icu), 660–690 V AC | 85 kA |
| Rated service short-circuit breaking capacity (Ics), 220–690 V AC | 85 kA |
| Rated short-time withstand current (Icw) | 75 kA for 1 s; 65 kA for 3 s |
| Current type | AC |
| Power loss | 60 W |
| Electrical durability | 12,000 cycles at ≤440 V AC; 12,000 cycles at 500–690 V AC |
| Electrical operating frequency | 20 cycles per hour |
| Mechanical durability | 20,000 cycles |
| Mechanical operating frequency | 60 cycles per hour |
| Auxiliary contacts | 4 |
| Position indication | Circuit breaker open / closed |
| Standards | IEC |
| Dimensions (H × W × D) | 418 × 530 × 302 mm |
| Net weight | 76 kg |
| EAN | 8015644577162 |
| Customs tariff number | 85362090 |
Frequently Asked Questions
What is the ABB 1SDA056376R1 used for?
The ABB 1SDA056376R1 is a fixed air circuit breaker used for switching and protecting high-current low-voltage electrical distribution circuits against overload and short-circuit conditions.
What is the rated current of the ABB E3H1250 1SDA056376R1?
The circuit breaker has a rated uninterrupted current of 1250 A, making it suitable for demanding industrial, commercial and infrastructure power distribution applications.
What protection unit is fitted to this circuit breaker?
The 1SDA056376R1 is fitted with an ABB PR121/P-LI R1250 electronic overcurrent release, providing long-time overload and instantaneous short-circuit protection.
What does LI protection mean?
LI denotes long-time overload protection and instantaneous short-circuit protection, providing electronic overcurrent protection for low-voltage distribution circuits.
What is the short-circuit breaking capacity of the ABB E3H1250?
The E3H1250 1SDA056376R1 provides an ultimate short-circuit breaking capacity of 100 kA from 220–500 V AC and 85 kA at 660–690 V AC, with a rated service short-circuit breaking capacity of 85 kA across the specified operating-voltage range.
Is the ABB 1SDA056376R1 fixed or withdrawable?
The 1SDA056376R1 is a four-pole fixed air circuit breaker with rear horizontal terminals for permanent integration into compatible low-voltage switchboards.
Trusted ABB Power Distribution Technology
ABB SACE Emax air circuit breakers provide robust high-current switching and electronic circuit protection for demanding low-voltage distribution systems, combining high short-circuit performance with dependable protection and practical switchgear integration.
