Siemens MD63B800 3 Pole 800 Amp 600V Sentron Molded Case Circuit Breaker

The Siemens MD63B800 is an 800-amp, 3-pole, 600V Sentron Series molded case circuit breaker with thermal-magnetic trip. The MD frame is a compact, cost-effective solution for main and feeder protection in industrial and commercial applications. Features an interchangeable trip unit with LI (Long-time, Instantaneous) trip function.

MD63B800 Specifications

SpecificationValue
Amperage800A
Poles3
Voltage600V AC / 250V DC
Interrupt Rating25kA @ 600V / 65kA @ 240V
Frame SizeMD (800A Frame)
Mounting TypeBolt-On
Trip TypeThermal-Magnetic
Trip FunctionLI (Long-time, Instantaneous)
Wire SizeUp to 600 kcmil
Phase3-Phase
StandardsUL 489, CSA C22.2 No. 5
Temperature Rating40°C

Key Features

  • 800A continuous rating at 40°C
  • 25kA interrupting capacity at 600V
  • Thermal-magnetic trip with interchangeable trip unit
  • LI trip function (Long-time, Instantaneous)
  • Compact design for space-constrained installations
  • UL 489 listed, CSA certified

Applications

  • Main breaker in commercial panelboards
  • Feeder protection in industrial distribution
  • Service entrance equipment
  • Retrofit replacement for legacy MD-frame breakers

Replaces: MD63B800, MD6B800

Buy MD63B800 Circuit Breaker

Siemens Sentron MD Frame 800A 3-pole circuit breaker. In stock at AllBreakerSales.com. Call (877) 611-0034 for same-day pricing. Genuine OEM parts, ships from US warehouse.

Brand: Siemens | Series: Sentron MD Frame | Catalog Number: MD63B800

Related Circuit Breakers

MD63B800 - Siemens Sentron MD Frame | LMD63B800 - Siemens Sentron LMD Frame | ND63B1200 - Siemens ND N-Frame | LD63B600 - Siemens LD L-Frame

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