Overview
The ABB S202U-K8 is a thermal-magnetic miniature circuit breaker from the S200U series, designed for branch circuit protection in industrial control panels and automation applications. Rated at 8 amps, 240 VAC with a 10kA interrupt capacity, this 2-pole unit features K-curve trip characteristics suitable for equipment with moderate inrush currents. The DIN rail mounting format integrates seamlessly into standard industrial control enclosures.
Key Features
- 2-pole configuration for single-phase circuit protection
- K-curve/thermal-magnetic trip for reliable overcurrent detection
- 10,000 A (10kA) short-circuit interrupt rating at 240 VAC
- Compact DIN rail mount design (71 mm L × 35 mm W × 92 mm H)
- Toggle actuator for manual operation and status indication
- Screw-type wire terminals accepting 18–4 AWG conductors
Technical Specifications
The ABB S202U-K8 delivers consistent performance across standard industrial operating conditions:
- Current Rating: 8 amps
- Voltage Rating: 240 VAC, 50/60 Hz
- Interrupt Capacity: 10 kA at 240 VAC
- Trip Characteristic: K-curve (thermal-magnetic)
- Trip Point Range: 1.05–1.2 A (thermal), 8–12 A (magnetic)
- Number of Poles: 2
- Operating Temperature Range: −25 to +55 °C
- Enclosure Rating: IP20
- Wire Gauge: 18 to 4 AWG (line and load)
- Mounting Type: DIN rail (35 mm standard)
Typical Applications
The ABB S202U-K8 is commonly used for:
- Branch circuit protection in industrial control cabinets
- Motor starter and drive circuit protection (moderate inrush)
- PLC, HMI, and automation module power circuits
- Lighting and heating element circuits in manufacturing facilities
- General-purpose industrial automation systems
Compatibility & Replacements
Compatible With
- Standard 35 mm DIN rail installation (EN 60715)
- Industrial control panels and electrical distribution systems
- Single-phase 240 VAC AC power distribution
- Allen-Bradley, Siemens, Schneider Electric, and other modular control systems
- Systems requiring UL 489, CSA 22.2 No. 5, or IEC 60947-2 compliance
Replaces / Drop-In Replacement For
The ABB S202U-K8 is a specific model number in the S200U series. Verify part compatibility with your system integrator before ordering, as replacement models depend on voltage, amperage, and trip curve requirements. Related ABB 2-pole K-curve models include S201U-K8 (1-pole) and S203U-K8 (3-pole) variants.
Works With
- UL 489 listed circuit protection systems
- Standard industrial control software and SCADA systems (no active communication required)
- Thermal-magnetic trip technology compatible with all AC frequency applications (50/60 Hz)
- IEC 60947-2 and CSA certified installations
