Overview
The ABB S272-K1H11 is a single-pole miniature circuit breaker from the Pro M series, engineered for AC electrical distribution in industrial and commercial control applications. This compact device combines thermal-magnetic trip technology with a 1A current rating and K-curve characteristic for reliable overcurrent protection. The DIN rail mounting design enables quick installation in standard 35mm rail enclosures without tools.
Key Features
- Thermal-magnetic trip protection with K-curve characteristic for motor and inductive load protection
- Single-pole, single-throw (SPST) contact configuration for simple on/off control
- DIN rail 35mm mounting for standard industrial panel installations
- Compact molded-case design with ABS/plastic housing for corrosion resistance
- Agency approvals: UL, CSA, IEC, and CE certified
Technical Specifications
- Rated Current: 1 A
- Trip Characteristic: K-curve thermal-magnetic
- Voltage Rating: 480V AC maximum (single pole)
- Poles/Configuration: 1 pole, single throw (SPST)
- Mounting Style: DIN rail 35mm
- Operating Temperature: –20°C to +65°C
- Material: Molded ABS/plastic with copper contacts
- Break Time: Instantaneous (short-circuit)
- Certifications: UL 1077, CSA, IEC 60898, CE
- Application Type: AC only
Typical Applications
The S272-K1H11 is ideal for:
- Low-current control circuits requiring motor or inductive load protection
- PLC and automation panel branch circuits
- HVAC and refrigeration unit starter circuits
- Industrial machinery control cabinets and enclosures
- Building automation and lighting control systems
Compatibility & Replacements
The S272-K1H11 is part of ABB’s modular Pro M miniature circuit breaker family and is compatible with all standard 35mm DIN rail applications. When replacing older breakers, verify matching voltage rating, current rating, and trip characteristic. Related single-pole alternatives in the S272 series include the K0.5A, K1.6A, K2A, and K3A variants for different amperage requirements. For two-pole applications, consult the S272-K2 or higher series models. Always refer to the original control panel documentation and local electrical codes when selecting replacement breakers.
