A120 - 20 Amp Circuit Breaker

A120 - 20 Amp Circuit Breaker

The A120 20 Amp Circuit Breaker is your go-to solution for safe, reliable electrical protection in Challenger and T&B load centers. Its slim ½″ profile, left-side clip, and plug‑in design make it quick and easy to install. Backed by ETL listing and a solid 10,000 AIC rating, this breaker offers dependable performance in both residential and light commercial applications. It's also known by part number UBITBA‑120L, and serves as a direct replacement for the Crouse-Hinds MH120.

Key Features and Benefits

• Slim, space-saving build: At just ½″ thick with a left-side clip, it fits neatly into crowded panels, freeing up room for future expansion.
• Enhanced safety with ETL listing: Tested and certified to exceed industry standards—10,000 AIC for impulse protection gives you peace of mind.
• Hassle-free compatibility: Designed specifically for Challenger and T&B panels, it installs effortlessly and works seamlessly.
• Durable plug-in construction: The molded case and thermal-magnetic design deliver consistent protection against overloads and short circuits.

Technical Specifications

• Ampere Rating: 20 Amps
  
• Poles: 1‑Pole
  
• Clip Type: Left‑clip (power hook on non‑rejection side)
  
• Thickness: ½″ (13 mm)
  
• Interrupting Rating: 10,000 AIC
  
• Weight: 0.4 lbs (≈ 181 g)
  
• Dimensions:
  • Width: 0.50 inches
  • Length: 3.38 inches
  • Depth: 2.63 inches
• UPC: 00094925021011
  
• Type: Thermal‑magnetic, plug‑in
  

Certifications & Compliance

• ETL Listing: The A120 is ETL listed—fully meeting or exceeding UL safety standards. Its molded housing and thermal-magnetic mechanism ensure long-lasting performance and reliable protection against electrical hazards.

Suitability

• Whether you're doing a fresh install or swapping in a replacement breaker, the A120 excels in Challenger and T&B load centers found in homes, garages, workshops, and light commercial settings. Its thin design fits crowded breaker spaces, and the left-side clip allows for easier access in tight electrical panels.