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.
2CDS273334R0468 ABB ST203M-Z16 Miniature Circuit Breaker 3P Z 16A
ABB ST203M-Z16 is a 16 A three-pole Z-characteristic miniature circuit breaker with 15 kA breaking capacity designed for sensitive UL 1077 supplementary overcurrent and short-circuit protection.
£84.10
Why Choose the ABB ST203M-Z16 Miniature Circuit Breaker?
The ABB ST203M-Z16 is a high-performance three-pole miniature circuit breaker (MCB) designed to provide dependable overcurrent and short-circuit protection in sensitive industrial electrical and control systems. As part of the robust ABB ST200M series, it combines a 16 A rated current with a Z tripping characteristic for circuits requiring rapid magnetic response to comparatively low overcurrents.
Designed for supplementary protection in accordance with UL 1077, the ST203M-Z16 is well suited to industrial machinery, control panels and electrical equipment where sensitive circuit protection and convenient DIN-rail installation are required. Its thermal-magnetic operating principle provides automatic interruption in response to overloads and short circuits.
The ST203M-Z16 features three protected poles, a 16 A current rating and a Z tripping characteristic. With a 15 kA short-circuit breaking capacity, it provides robust supplementary protection for sensitive control, automation and electronic circuits.
Key Advantages
- Reliable three-pole miniature circuit breaker for industrial circuit protection.
- 16 A rated current for three-phase circuits and equipment.
- Z tripping characteristic for sensitive circuits requiring rapid magnetic fault response.
- 15 kA short-circuit breaking capacity for robust fault protection.
- UL 1077 supplementary protection for electrical equipment and control circuits.
- Compact modular construction for straightforward DIN-rail installation.
Key Features
- ABB ST200M miniature circuit breaker series.
- Three-pole configuration.
- 16 A rated current.
- Z tripping characteristic.
- 15 kA breaking capacity.
- Thermal-magnetic overload and short-circuit protection.
- UL 1077 supplementary-protector classification.
- Compact modular format for industrial electrical installations.
Sensitive Protection for Industrial Electrical Circuits
Miniature circuit breakers such as the ABB ST203M-Z16 automatically disconnect a circuit when excessive current is caused by an overload or short circuit. This helps protect wiring and connected electrical equipment while allowing convenient reset and restoration of the circuit once the fault has been resolved.
The Z characteristic provides a more sensitive magnetic response than characteristics intended for loads with substantial inrush currents. Combined with the ST200M series' modular DIN-rail format, this makes the ST203M-Z16 particularly suitable for supplementary protection of sensitive control, automation and electronic equipment.
Typical Applications
- Industrial machinery and automation equipment.
- Electrical control panels and switchboards.
- Sensitive control and auxiliary circuits.
- Electronic and instrumentation circuits.
- OEM equipment requiring supplementary circuit protection.
- Circuits requiring sensitive short-circuit response.
Technical Specifications
Tick the specs you need, then view products that match.
| Certification | UL 1077 | |
|---|---|---|
| Series | ST200M | |
| ABB order code | 2CDS273334R0468 | |
| Product type | Miniature circuit breaker / supplementary protector | |
| Number of poles | 3 | |
| Rated current | 16 A | |
| Tripping characteristic | Z | |
| Short-circuit breaking capacity | 15 kA | |
| Protection principle | Thermal-magnetic | |
| Standard / approval | UL 1077 | |
| Mounting type | DIN rail |
Frequently Asked Questions
What is the ABB ST203M-Z16 used for?
The ST203M-Z16 provides overload and short-circuit protection for sensitive industrial electrical, control and automation circuits.
What is the current rating of the ST203M-Z16?
The ABB ST203M-Z16 has a rated current of 16 A.
How many poles does the ST203M-Z16 have?
The ST203M-Z16 is a three-pole miniature circuit breaker, allowing simultaneous protection and switching of three conductors.
What does the Z characteristic mean?
The Z tripping characteristic provides sensitive magnetic operation and is suited to circuits where rapid response to comparatively low short-circuit or overcurrent levels is required.
Does the ABB ST203M-Z16 comply with UL 1077?
Yes. The ST203M-Z16 is designed as a UL 1077 supplementary protector for use within electrical equipment and industrial control systems.
Trusted Industrial Circuit Protection from ABB
ABB ST200M miniature circuit breakers provide compact and dependable supplementary circuit protection for industrial machinery, automation equipment and electrical control systems where reliable switching and overcurrent protection are essential.
