ABB S271 K1A Miniature Circuit Breaker – K Characteristic

ABB S271 K1A Miniature Circuit Breaker – 1A K-Curve

The ABB S271 K1A is a single-pole miniature circuit breaker from the System pro M S270 series. It is rated at 1 A and features a K tripping characteristic for cable and appliance protection in industrial and commercial installations.

This device combines thermal and magnetic trip mechanisms within a compact DIN-rail form factor for panel integration.

Protection Characteristics

• Rated current: 1 A
• K characteristic tripping curve
• Thermal overload and magnetic short-circuit protection
• Rated operational voltage: 230/400 V AC (single pole)
• 6 kA short-circuit breaking capacity

Mechanical & Installation Features

The breaker mounts on standard 35 mm DIN rails (EN 50 022). It features box terminals with a tightening torque of 2 Nm and a unit depth of 68 mm. Mechanical service life is rated for 20,000 operations. Protection class is IP20, increasing to IP40 when installed in a distribution board.

Applications

• Industrial control panels
• Commercial electrical distribution
• Cable and appliance protection circuits