Overview
The ABB S281-K6H11 is a miniature circuit breaker from ABB’s System pro M product line, delivering reliable overcurrent and short-circuit protection for single-phase AC circuits. With a 6-ampere rated current and K-type (medium) trip curve, this breaker provides dependable protection for industrial control, lighting, and general-purpose circuits. The compact DIN rail mounting design simplifies installation and allows for space-efficient panel layouts.
Key Features
- Single-pole configuration for single-phase AC protection
- K-type (medium) instantaneous trip characteristic for fast fault clearing
- 6-ampere rated current capacity
- Compact DIN rail mounting (35 mm standard)
- Thermal-magnetic protection mechanism
- UL, CSA, IEC, and CE certifications for worldwide compliance
Technical Specifications
- Number of Poles: 1 (single-pole)
- Rated Current: 6 A
- Trip Characteristic: K (medium, 3–5 × In)
- Voltage Rating: Up to 440 V AC (typical for S281 series)
- Frequency: 50/60 Hz
- Mounting Type: DIN rail (35 mm)
- Protection Type: Thermal-magnetic overcurrent and short-circuit
- Certifications: UL, CSA, IEC, CE
Typical Applications
The S281-K6H11 is ideal for:
- Industrial control panel protection (PLC circuits, solenoid coils, contactor circuits)
- Low-voltage AC distribution networks
- Lighting and receptacle circuits in commercial buildings
- Motor branch circuit protection (where motor starting current does not exceed K-type limits)
- General-purpose circuit protection in automation systems
Compatibility & Replacements
The S281-K6H11 is part of ABB’s established miniature circuit breaker ecosystem. Other single-pole, 6-ampere variants in the S281 series include models with B, C, and Z trip characteristics for different protection profiles. For three-phase applications, consider the S283-K6 series. Verify voltage rating and frequency compatibility with your installation before substitution. ABB provides cross-reference documentation for legacy model transitions.
