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1SDA073437R1 ABB E1.2B/MS 1250 4p F F Switch-Disconnector
ABB 1SDA073437R1 E1.2B/MS 1250 is a 1250 A four-pole fixed SACE Emax 2 switch-disconnector with a fully rated neutral, front terminals and 42 kA short-time withstand capability for reliable low-voltage switching and isolation.
£4,911.39
Why Choose the ABB E1.2B/MS 1250 4p F F Switch-Disconnector?
The ABB E1.2B/MS 1250 4p F F, order code 1SDA073437R1, is a 1250 A four-pole fixed switch-disconnector from the ABB SACE Emax 2 range, designed for dependable switching and isolation in low-voltage power distribution systems.
As an E1.2B/MS switch-disconnector, the device provides circuit switching and isolation rather than automatic overcurrent protection. It is therefore well suited to installations where overload and short-circuit protection is provided by coordinated protective devices elsewhere in the electrical system.
The compact E1.2 platform combines a 1250 A rated uninterrupted current, a fully rated neutral pole and a short-time withstand current of 42 kA for 1 s. Its fixed four-pole construction and front terminals provide a practical solution for permanent low-voltage switchboard installations.
Key Advantages
- High-capacity 1250 A switch-disconnector for low-voltage power distribution.
- Four-pole configuration with a neutral pole rated at 100% of the phase current.
- Reliable switching and electrical isolation.
- 42 kA short-time withstand current for 1 s.
- 24 kA short-time withstand current for 3 s.
- Rated for operation up to 690 V AC.
- Compact fixed construction for permanent switchboard installation.
- Front terminals provide straightforward main-circuit connections.
Key Features
- ABB SACE Emax 2 E1.2B/MS series.
- 1250 A rated uninterrupted current.
- Four-pole configuration.
- 100% rated neutral pole.
- Switch-disconnector functionality without an integrated protection trip unit.
- 690 V AC rated operational voltage.
- 1000 V AC rated insulation voltage.
- 12 kV rated impulse withstand voltage.
- 42 kA Icw for 1 s.
- 24 kA Icw for 3 s.
- Fixed mounting arrangement.
- Front bolt-type main-circuit terminals.
- 122 W power loss.
Compact Four-Pole Switching and Isolation
ABB SACE Emax 2 switch-disconnectors provide dependable switching and isolation within modern low-voltage distribution systems. The E1.2B/MS platform combines a compact footprint with a 1250 A current rating and a fully rated neutral pole, making it particularly suitable for four-wire distribution networks.
The 42 kA short-time withstand capability for 1 s enables the device to withstand substantial fault current while coordinated protective equipment clears the fault. Fixed mounting and front bolt terminals simplify integration into permanent distribution switchboards where reliable isolation and straightforward connection are priorities.
Typical Applications
- Low-voltage main distribution switchboards.
- Four-wire three-phase power distribution systems.
- Industrial circuit switching and isolation.
- Commercial and institutional electrical installations.
- Infrastructure power distribution systems.
- Switchboards using separately coordinated overcurrent protection.
Technical Specifications
| Series | SACE Emax 2 |
|---|---|
| Order code | 1SDA073437R1 |
| GTIN / EAN | 8015644772871 |
| Product type | Switch-disconnector |
| Frame / sub-type | E1.2 |
| Short-circuit performance level | B |
| Rated current (In) | 1250 A |
| Rated uninterrupted current (Iu) | 1250 A |
| Number of poles | 4 |
| Neutral pole current | 100% Iu |
| Rated operational voltage (Ue) | 690 V AC |
| Rated insulation voltage (Ui) | 1000 V AC |
| Rated impulse withstand voltage (Uimp) | 12 kV |
| Rated short-time withstand current (Icw), 1 s | 42 kA |
| Rated short-time withstand current (Icw), 3 s | 24 kA |
| Power loss | 122 W |
| Electrical durability | 8000 cycles |
| Mechanical durability | 20000 cycles |
| Mounting | Fixed |
| Terminal connection | Front |
| Terminal type | Bolt |
| Current type | AC |
| Product net width | 280 mm |
| Product net height | 296 mm |
| Product net depth | 183 mm |
| Product net weight | 16 kg |
| Standard | IEC |
Frequently Asked Questions
What is the ABB 1SDA073437R1?
The ABB 1SDA073437R1 is a 1250 A four-pole fixed SACE Emax 2 switch-disconnector with front terminals, designed for switching and isolation in low-voltage power distribution systems.
What is the rated current of the ABB E1.2B/MS 1250?
The E1.2B/MS 1250 has a rated uninterrupted current of 1250 A, with its neutral pole rated at 100% of the phase current.
Does the ABB E1.2B/MS 1250 provide automatic overcurrent protection?
No. The E1.2B/MS is a switch-disconnector intended for switching and isolation, so suitable overload and short-circuit protection must be provided by coordinated protective devices elsewhere in the electrical system.
What is the short-time withstand current of the E1.2B/MS 1250?
The ABB E1.2B/MS 1250 has a rated short-time withstand current of 42 kA for 1 s and 24 kA for 3 s.
What mounting and terminal arrangement does the ABB 1SDA073437R1 use?
The 1SDA073437R1 is a fixed four-pole switch-disconnector with front bolt-type main-circuit terminals.
Trusted Switching for Low-Voltage Distribution
ABB SACE Emax 2 switch-disconnectors provide robust switching and isolation for modern low-voltage power systems, combining dependable short-time withstand performance, compact construction and practical switchboard integration.
