Overview
The ABB S201U-K8 is a single-pole miniature circuit breaker designed for branch circuit protection in industrial automation and control applications. Operating at 240V AC with a rated current of 8 amps and 10kA interrupt capacity, this DIN rail-mounted breaker combines delayed thermal and electromechanic tripping mechanisms to protect against both overloads and short circuits. Compliant with UL 489 and CSA 22.2 No. 5 standards, the S201U-K8 is suitable for commercial and industrial electrical systems.
Key Features
- K-curve thermal-magnetic trip characteristic for moderate inrush tolerance
- Current-limiting design reduces fault energy for enhanced protection
- Dual tripping mechanisms: delayed thermal (overload) and electromechanic (short-circuit)
- DIN rail mounting with finger-safe, multi-function terminals
- Toggle actuator for manual on/off control
- UL 489, CSA 22.2 No. 5, and IEC/EN 60947-2 certified
Technical Specifications
- Rated Current: 8 Amps
- Voltage Rating: 240 VAC, 50/60 Hz
- Interrupt Capacity: 10 kA at 240V
- Poles: 1-pole (1P)
- Trip Curve: K-curve (thermal magnetic)
- Mounting: DIN rail mount
- Terminal Type: Multi-function, finger-safe terminals
- Enclosure Rating: IP20
- Operating Temperature: −25°C to +55°C
- Dimensions: 69 mm (L) × 17.5 mm (W) × 88 mm (H)
- Certifications: UL 489, CSA 22.2 No. 5, IEC/EN 60947-2
- Series: ABB System pro M compact S200U
Typical Applications
The ABB S201U-K8 is commonly used in:
- Industrial automation control panels and switchboards
- Machine tool and motor branch circuit protection
- HVAC and refrigeration equipment circuits
- Commercial lighting and general-purpose branch circuits
- Power distribution units with moderate inrush loads
Compatibility & Replacements
Compatible With
- Standard 35 mm DIN rail installations (EN 60715)
- ABB System pro M compact switchgear and distribution boards
- IEC 61984-compliant busbar systems
- Industrial control cabinets and electrical enclosures
Replaces / Drop-In Replacement For
- Earlier ABB S200 series 1P 8A models with similar voltage and trip curve requirements
- Other 1P 8A K-curve MCBs rated 240V and 10kA (verify pin/terminal compatibility)
Works With
- ABB S200U series breakers (stackable for multi-pole configurations)
- Standard DIN rail-mount accessories and cable lugs
- Industrial electrical design software supporting IEC 60947-2 components
