Cutler Hammer ST1221 - 20A, 1-Pole, Circuit Breaker

Meet the Cutler Hammer ST1221 — a dependable 20A, 1-Pole circuit breaker crafted for demanding electrical environments. This compact, single-pole design delivers focused protection for a dedicated circuit, making it an efficient choice where space and reliability matter.

Engineered for flexible use in panelboards, switchboards, and control panels, the ST1221 provides clear, consistent overcurrent protection while maintaining safe operation across daily workloads. Its 20A rating ensures you’re safeguarded against overloads on circuits that demand reliable performance without unnecessary tripping.

• Model and rating: Cutler Hammer ST1221 — 20A, 1-Pole circuit breaker
• Application fit: ideal for panelboards, switchboards, and control panels requiring compact, targeted protection
• Protection scope: dependable overcurrent protection to prevent wiring damage and equipment faults
• Ideal use cases: industrial, commercial, and OEM applications where safety and reliability are critical
• System integration: suitable for distribution panels and motor control centers that rely on sturdy, continuous protection
• Brand advantage: backed by the Cutler Hammer name, synonymous with durability and consistent electrical protection in demanding installations

In practice, the ST1221 simplifies circuit protection for single-branch loads, whether you’re wiring a new panel, upgrading an existing distribution setup, or replacing a failed breaker in a motor control center. It’s a straightforward, purpose-built solution that aligns with real-world needs, delivering reliable performance when it matters most.