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ABB S303P-D40 MCB – 3P – D Curve – 40A – 25kA
ABB S303P-D40 miniature circuit breaker, a 40 A three-pole D-characteristic AC circuit breaker with a 25 kA rated breaking capacity for industrial electrical protection.
£107.85
Why Choose the ABB S303P-D40 Miniature Circuit Breaker?
The ABB S303P-D40 is a robust three-pole miniature circuit breaker (MCB) designed to provide reliable protection against overloads and short circuits in industrial electrical installations. As part of the ABB System pro M compact S300P series, it combines a high 25 kA breaking capacity with a D tripping characteristic for demanding circuit protection applications.
The S303P-D40 provides thermal-magnetic overcurrent protection and is designed for use in electrical distribution and industrial control systems where dependable circuit protection is required. Its three-pole configuration protects three live conductors without a neutral pole, while the compact modular design supports straightforward installation within distribution boards and control panels.
With a 40 A rated current, D tripping characteristic and 25 kA rated ultimate short-circuit breaking capacity at 415 V AC, the S303P-D40 is suited to circuits where higher inrush currents can occur. Its DIN-rail mounting and screw terminal arrangement provide practical installation within professional electrical assemblies.
Key Advantages
- Three-pole miniature circuit breaker designed for industrial electrical protection.
- 40 A rated current for circuit protection applications.
- D tripping characteristic suitable for circuits with higher starting or inrush currents.
- 25 kA rated breaking capacity at 415 V AC.
- DIN-rail mounting for convenient installation in distribution and control equipment.
- Designed to protect electrical circuits against overloads and short circuits.
Key Features
- ABB System pro M compact S300P series.
- S303P-D40 three-pole configuration.
- 40 A rated current.
- D tripping characteristic.
- 25 kA rated ultimate short-circuit breaking capacity.
- Three poles with no neutral pole.
- Thermal-magnetic overcurrent protection.
- DIN-rail mounting design.
- Failsafe bi-directional cylinder-lift screw terminals.
- 50 / 60 Hz rated frequency.
- Integrated trip indication for clear identification of the tripped position.
Reliable Overcurrent Protection for Industrial Circuits
The ABB S303P-D40 combines thermal and magnetic protection to disconnect a circuit when excessive current conditions occur. The thermal mechanism responds to sustained overload conditions, while the magnetic protection provides rapid interruption during short-circuit events.
The D characteristic is intended for applications where circuits can experience comparatively high transient or starting currents. This makes the S300P D-characteristic range suitable for selected industrial loads and equipment where higher inrush currents need to be accommodated while maintaining dependable circuit protection.
Typical Applications
- Industrial electrical distribution systems.
- Motor and machinery circuits requiring D-characteristic protection.
- Control panels and switchboards.
- Industrial automation installations.
- Manufacturing and production equipment.
- Electrical circuits with higher inrush currents.
- OEM machinery and professional electrical installations.
Technical Specifications
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| Current | 40 A | |
|---|---|---|
| Poles | 3-pole | |
| Phase | Three Phase | |
| Device Type | MCB | |
| Trip Curve | D curve | |
| Breaking Capacity | 25 kA | |
| ABB part number | 2CDS383001R0401 | |
| Number of poles | 3P | |
| Number of protected poles | 3 | |
| Product type | Miniature circuit breaker | |
| Neutral | No neutral pole | |
| Rated current | 40 A | |
| Tripping characteristic | D | |
| Rated ultimate short-circuit breaking capacity (Icu) | 25 kA at 415 V AC | |
| Rated service short-circuit breaking capacity (Ics) | 10 kA | |
| Rated operating voltage | 415 V AC | |
| Maximum operating voltage | 457 V AC | |
| Rated insulation voltage | 500 V AC | |
| Rated impulse withstand voltage | 6 kV | |
| Rated frequency | 50 / 60 Hz | |
| Mounting type | DIN rail | |
| Mounting rail | TH35-15 / TH35-7.5 according to IEC 60715 | |
| Terminal type | Failsafe bi-directional cylinder-lift screw terminals | |
| Terminal tightening torque | 2.8 N·m | |
| Width | 52.5 mm | |
| Height | 88 mm | |
| Depth | 69 mm | |
| Weight | approx. 0.372 kg | |
| Protection rating | IP20 | |
| Overvoltage category | IV | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 No. 235 | |
| Manufacturer | ABB | |
| Series | System pro M compact S300P | |
| Model | S303P-D40 | |
| Order code | 2CDS383001R0401 | |
| Rated breaking capacity | 25 kA | |
| Supply | AC |
Frequently Asked Questions
What is the ABB S303P-D40 used for?
The ABB S303P-D40 is a three-pole miniature circuit breaker used to protect electrical circuits against overloads and short circuits in industrial and electrical distribution applications.
What is the rated current of the S303P-D40?
The S303P-D40 has a 40 A rated current.
What is the tripping characteristic of this circuit breaker?
The S303P-D40 has a D tripping characteristic, making it suitable for selected circuits that can experience higher starting or inrush currents.
What is the breaking capacity of the ABB S303P-D40?
The circuit breaker has a 25 kA rated ultimate short-circuit breaking capacity at 415 V AC.
How many poles does the S303P-D40 have?
The S303P-D40 is a 3-pole miniature circuit breaker and does not include a neutral pole.
How is the ABB S303P-D40 mounted?
The circuit breaker is designed for DIN-rail mounting in suitable distribution boards, control panels and electrical assemblies.
Trusted by Electrical Professionals
ABB System pro M compact S300P miniature circuit breakers provide dependable overcurrent protection for industrial electrical distribution, control panels, machinery and automation installations.
