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ABB S203MT-Z25H01 MCB – S200M – 3P – Z – 25A
ABB S203MT-Z25H01 three pole 25A Z characteristic miniature circuit breaker designed for railway, traction and industrial electrical protection with 10 kA short circuit capacity.
Why Choose the ABB S203MT-Z25H01 Miniature Circuit Breaker?
The ABB S203MT-Z25H01 is a high quality 3-pole miniature circuit breaker (MCB) designed for dependable overload and short circuit protection in railway, traction and industrial electrical systems. Part of the ABB S200MT miniature circuit breaker series, it provides reliable protection for demanding installations where safety, compact design and long service life are essential.
With a Z characteristic tripping curve, the S203MT-Z25H01 is suitable for circuits requiring rapid magnetic tripping at relatively low fault current levels. This makes it well suited to sensitive electronic equipment, instrumentation, signalling circuits and control systems where fast disconnection helps protect critical components.
Featuring a 25 A rated current, 3-pole configuration and 10 kA rated short circuit capacity, the ABB S203MT-Z25H01 is ideal for railway vehicles, industrial control panels, OEM machinery and automation systems requiring dependable three-phase circuit protection.
Key Advantages
- High quality ABB miniature circuit breaker for railway and industrial applications.
- 3-pole MCB for three-phase circuit protection.
- 25 A rated current for industrial distribution and control circuits.
- Z characteristic tripping curve for rapid protection of sensitive electrical equipment.
- 10 kA short circuit breaking capacity for dependable fault protection.
- Compact DIN rail format for distribution boards, machine cabinets and control panels.
Key Features
- ABB S200MT series.
- Model: S203MT-Z25H01.
- Alternative model: S203MT-Z25.
- Rated current: 25 A.
- Z characteristic tripping curve.
- 3 protected poles (3P).
- 10 kA rated short circuit capacity.
- Thermal overload and electromagnetic short circuit protection.
- DIN rail mounting for modular electrical installations.
Fast Acting Protection for Sensitive Electrical Systems
Miniature circuit breakers such as the ABB S203MT-Z25H01 protect electrical installations by disconnecting circuits during overload or short circuit conditions. The delayed thermal trip mechanism responds to overloads, while the electromagnetic trip mechanism reacts rapidly to short circuit faults.
The Z curve characteristic makes this MCB a strong choice for applications where sensitive equipment requires fast fault detection. This helps support safe operation in control panels, signalling systems and automation circuits where lower fault currents must be cleared quickly.
Typical Applications
- Railway and rolling stock electrical systems.
- Industrial control panels and automation systems.
- Instrumentation and signalling circuits.
- Electronic equipment protection.
- OEM machinery and panel building.
- Three-phase distribution circuits.
Technical Specifications
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| Current | 25 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | Z curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | S200MT | |
| Model | S203MT-Z25H01 | |
| Alternative model | S203MT-Z25 | |
| Product ID | 2CDS273445R0518 | |
| EAN | 4016779128056 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 25 A | |
| Tripping characteristic | Z | |
| Number of poles | 3 | |
| Rated operational voltage | Up to 400 V AC | |
| Rated insulation voltage | 440 V | |
| Rated impulse withstand voltage | 4 kV | |
| Frequency | 50 / 60 Hz | |
| Rated short circuit capacity | 10 kA | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 No. 235 | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm | |
| Weight | approx. 0.375 kg |
Frequently Asked Questions
What is the ABB S203MT-Z25H01 used for?
The ABB S203MT-Z25H01 is used to protect three-phase electrical circuits against overloads and short circuits in railway, industrial and automation applications.
What is the rated current of this MCB?
This miniature circuit breaker has a 25 A rated current.
What does the Z tripping curve mean?
The Z characteristic provides rapid magnetic tripping at relatively low fault current levels, making it suitable for sensitive electronic equipment, instrumentation and control circuits.
How many poles does the S203MT-Z25H01 have?
The ABB S203MT-Z25H01 has a 3-pole (3P) configuration for three-phase circuit protection.
How is this circuit breaker installed?
It is designed for standard DIN rail mounting inside electrical distribution boards, control panels and machine cabinets.
Trusted by Railway and Industrial Engineers Worldwide
ABB S200MT miniature circuit breakers are widely used by panel builders, OEMs and railway engineers for reliable protection of electrical circuits in demanding transport and industrial environments.
