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.
1SDA057399R1 ABB E3N-A 2500 PR121/P-LI 2500A 3P Fixed Air Circuit Breaker
ABB 1SDA057399R1 E3N-A 2500 PR121/P-LI is a 2500 A three-pole fixed SACE Emax air circuit breaker with LI electronic protection and up to 65 kA service short-circuit breaking capacity.
£11,484.08
Why Choose the ABB E3N-A 2500 PR121/P-LI 2500A 3P Fixed Air Circuit Breaker?
The ABB E3N-A 2500 PR121/P-LI, order code 1SDA057399R1, is a high-current SACE Emax air circuit breaker designed for reliable switching and protection in demanding low-voltage power distribution systems. This E3N-A model has a rated current of 2500 A, three-pole construction and ABB's PR121/P-LI electronic overcurrent release.
The PR121/P-LI trip unit provides long-time overload and instantaneous short-circuit protection. Combined with the E3N-A circuit-breaker platform, these LI protection functions help safeguard cables, busbars, switchgear and connected equipment against sustained overcurrents and severe short-circuit faults.
This model is supplied as a fixed circuit breaker with rear flat horizontal terminals. It is rated for 600 V operation and provides a service short-circuit breaking capacity of 65 kA at 240 V AC and 50 kA at 480 and 600 V AC, making it suitable for substantial industrial and commercial distribution duties.
Key Advantages
- High-current 2500 A SACE Emax air circuit breaker for demanding low-voltage distribution.
- Three-pole configuration suitable for three-phase electrical systems.
- PR121/P-LI electronic trip unit provides long-time and instantaneous overcurrent protection.
- Service short-circuit breaking capacity up to 65 kA at 240 V AC.
- 50 kA breaking capacity at 480 and 600 V AC for demanding switchboard applications.
- Fixed construction with rear flat horizontal terminals for permanent switchboard installation.
Key Features
- ABB SACE Emax E3N-A series.
- 2500 A rated current.
- Three-pole construction.
- PR121/P-LI electronic overcurrent release.
- Long-time overload and instantaneous short-circuit protection.
- R2500 rating plug.
- 37,500 A instantaneous setting reference.
- 600 V rated voltage.
- 65 kA service breaking capacity at 240 V AC.
- 50 kA service breaking capacity at 480 and 600 V AC.
- Fixed version with rear flat horizontal terminals.
- Designed to UL 1066.
Reliable Protection for High-Current Power Distribution
Air circuit breakers such as the ABB SACE Emax E3N-A provide controlled switching and protection for high-current low-voltage distribution circuits. The electronic trip unit monitors circuit conditions and initiates tripping when configured thresholds are exceeded, helping minimise damage caused by overloads and severe short circuits.
The PR121/P-LI release combines long-time overload protection with instantaneous short-circuit protection. Together with the robust fixed E3N-A platform and substantial short-circuit breaking capacity, this makes 1SDA057399R1 suitable for important distribution points where dependable fault interruption and continuity of electrical service are required.
Typical Applications
- Low-voltage power distribution switchboards.
- Industrial electrical distribution systems.
- Main incoming circuit protection.
- High-current feeder protection.
- Busbar and distribution circuit protection.
- Commercial and infrastructure power systems.
Technical Specifications
| Series | SACE Emax |
|---|---|
| ABB order code | 1SDA057399R1 |
| Product group | 310513-New Emax |
| Product type | Air circuit breaker |
| Frame | E3 |
| Performance level | N-A |
| Rated current (In) | 2500 A |
| Rated operational current (Ie) | 2500 A |
| Rated uninterrupted current (Iu) | 2500 A |
| Rating plug | R2500 |
| Number of poles | 3 |
| Rated voltage | 600 V |
| Current type | AC |
| Trip unit | PR121/P-LI |
| Release type | Electronic |
| Protection functions | Long-time and instantaneous (LI) |
| Instantaneous setting reference | 37500 A |
| Service short-circuit breaking capacity (Ics) at 240 V AC | 65 kA |
| Service short-circuit breaking capacity (Ics) at 480 V AC | 50 kA |
| Service short-circuit breaking capacity (Ics) at 600 V AC | 50 kA |
| Installation version | Fixed |
| Terminal connection | Rear flat horizontal |
| Standard | UL 1066 |
Frequently Asked Questions
What is the ABB 1SDA057399R1 used for?
It is a 2500 A three-pole fixed SACE Emax air circuit breaker designed for switching and protecting high-current low-voltage electrical distribution systems.
What trip unit is fitted to the ABB E3N-A 2500?
This model is fitted with the ABB PR121/P-LI electronic overcurrent release, providing long-time overload and instantaneous short-circuit protection.
What is the rated current of ABB 1SDA057399R1?
The circuit breaker has a rated current of 2500 A and uses an R2500 rating plug.
What is the breaking capacity of the ABB E3N-A 2500?
The service short-circuit breaking capacity is 65 kA at 240 V AC and 50 kA at both 480 and 600 V AC.
Is the ABB 1SDA057399R1 fixed or withdrawable?
This model is a fixed circuit breaker equipped with rear flat horizontal terminals for permanent installation within compatible low-voltage switchgear.
Trusted by Power Distribution Professionals Worldwide
ABB SACE Emax air circuit breakers are engineered for dependable switching and protection in demanding low-voltage power distribution systems, combining robust construction with electronic overcurrent protection and high short-circuit performance.
