ABB S201U-K1 1A 1-Pole 240 V Circuit Breaker Potential Transformer

The ABB S201U-K1 is a purpose-built protection device designed for reliable, low-current safeguarding of 240 V circuits. With a precise 1 A rating and a single-pole design, this breaker delivers straightforward, dependable protection for light-load panels, control circuits, and sensitive electronics without unnecessary trips.

Key specifications at a glance

• Current rating: 1 A
• Poles: 1
• Voltage rating: 240 V
• Part number: S201U-K1

What makes this ABB breaker unique

Unlike generic protective devices, the S201U-K1 is engineered for dependable performance within ABB’s ecosystem, ensuring compatibility with existing panels and components. The 1 A setting is ideal for low-load applications where precision matters—such as lighting control, small machinery, or electronics that benefit from tight protection against nuisance trips. Its compact, single-pole format simplifies installation in tight panels and distribution boards.

Ideal use cases

• Residential and light-commercial circuits where sensitive devices require reliable overcurrent protection
• Control circuits in panels that interface with sensing equipment or potential transformers, enabling accurate protection without overreach
• Retrofits or replacements in ABB-based electrical systems that demand an exact part match for continued performance

Why choose the S201U-K1 for your system

Choosing this ABB model means you’re opting for consistency, predictable behavior, and easy maintenance within ABB-approved environments. The 1 A rating minimizes unnecessary interruptions for low-current loads while still delivering robust protection against short circuits and overloads. The 1-pole design supports streamlined wiring and compact panel layouts, making it a practical choice for modern electrical installations.

Installation and care tips

• Install in compatible 1-pole, 240 V circuits according to local electrical codes and the manufacturer’s instructions
• When replacing, confirm the part number is S201U-K1 to ensure seamless compatibility
• Inspect connections for tightness during periodic maintenance to maintain reliable protection

Built for professionals who value precise protection, straightforward installation, and durable performance, the ABB S201U-K1 1A 1-Pole 240 V Circuit Breaker stands ready to safeguard your lightweight load centers and sensing-enabled control systems. This part integrates smoothly with setups that may include potential transformers, providing dependable protection where it matters most.