ABB S201-K25 25A 1-Pole Circuit Breaker Potential Transformer

ABB S201-K25 25A 1-Pole Circuit Breaker

The ABB S201-K25 is a compact, dependable overcurrent protection device designed for single-pole circuits. With a 25 A current rating and the factory part number S201-K25, this 1-pole circuit breaker delivers reliable interruption to protect wiring, devices, and sensitive equipment in control panels, distribution boards, and other electrical assemblies. This model’s streamlined design makes it a versatile fit for a variety of panel layouts and electrical protection schemes, including systems that interface with potential transformer-based metering and protection schemes.

Key specifications at a glance

• Current rating: 25 A
• Pole configuration: 1-pole
• Part number: S201-K25
• Application: Single-pole overcurrent protection for branch circuits and control panels

Why this model stands out

Uniquely suited for single-phase protection in compact spaces, the ABB S201-K25 combines reliable protection with straightforward installation. Its 1-pole design simplifies wiring in smaller panels and minimizes footprint without compromising safety. The S201-K25 is built to meet robust protection standards, helping to prevent overload damage and reduce downtime in everyday electrical systems.

Ideal use scenarios

• Control panels for lighting, HVAC, and equipment rooms in commercial or industrial environments
• Small-to-medium subpanels where single-phase protection is required
• Instrumentation and machine-control cabinets that rely on dependable overcurrent protection
• Systems that integrate potential transformer-based metering or protection schemes

What problems it helps solve

• Safely interrupts excessive current to prevent insulation damage and wire overheating
• Provides quick, predictable fault isolation to minimize equipment downtime
• Supports organized, reliable protection in compact panel layouts

Installation and practical tips

Ensure correct pole configuration and compatibility with your panel’s mounting and busbar systems. Verify the rating aligns with the protected circuit’s load and wiring gauge. For systems using metering or protection schemes that involve potential transformers, pair this 1-pole breaker with the appropriate protective accessories and follow panel manufacturer guidelines for safe operation and labeling.

In use, what you can expect

Consistent performance in protecting single-phase circuits, straightforward replacement when maintenance is required, and a dependable component you can trust in daily electrical protection operations. The ABB S201-K25 25A 1-Pole Circuit Breaker delivers clear, actionable protection where it matters most—keeping your control panels and distribution setups safe and resilient.