Series 21X (Mini circuit breakers)
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Series 21X (Mini circuit breakers)

Auto, modified and manual reset mini circuit breakers.


  • Catalog Number: Series 21X Mini Circuit Breaker
  • Rating: 5-30A; 14Vdc
  • Interrupt Rating :150A @ 14Vdc (5-10A versions); 225A @ 14Vdc (15A version); 300A @ 14Vdc (20A version); 450A @ 14Vdc (25-30A versions)
  • Operating Temperature Rating: –40°F (–40°C) to 185°F (85°C)
  • Storage Temperature Rating: –40°F (–40°C) to 260°F (125°C)
  • Materials :Grey UL-Rated 94V0 thermoplastic housing with metal cover: gold (Type I) or silver (Type II)
  • Marking :Standard marking includes amp/voltage ratings, part number, and date code. OCR marking is available.
  • Termination: Compatible with 280 Type fuse blocks using 0.32in. (8.1mm) centerline spacing
  • Compliances: SAE J553 Type I and Type II Circuit Breakers