Eaton Electrical 1MCB400R 120/240 VAC 400 Amp 1-Phase 3-Wire Main Circuit Breaker Group Metering
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Manufacturer Cutler-Hammer / Eaton
Mfg Catalog # 1MCB400R
World Electric Part # 481


  • Interrupt Rating: 65 kAIC
  • Feed Type: Top/bottom
  • Phase: Single-phase
  • Utility Approvals: MI : DTE Energy (Detroit Edison)
  • Wire Size: (2) #3/0 AWG-250 kcmil, (1) #2/0 AWG-500 kcmil
  • Bus Material: Aluminum
  • Main Circuit Breaker: KD
  • Number Of Wires: Three-wire
  • Enclosure: NEMA 3R
  • Voltage Rating: 120/240V
  • Amperage Rating: 400A


  • UPC: 786849053192
  • Product Length/Depth: 15 IN
  • Product Height: 15 IN
  • Product Width: 24 IN
  • Product Weight: 106 LB
  • Warranty: Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
  • Certifications: UL Listed
  • Catalog Notes: If additional neutral lugs are needed, order 1MCB1200NLK [(3) 1/0-750 kcmil or (6) 1/0-300 kcmil]. Add CL to end of catalog number for compression lug pads (includes lug pads for lines and neutral).


UPC 78684905319
Product Description Eaton main circuit breaker, 400A, Aluminum, NEMA 3R, Overhead/underground, 65 kAIC, KD, Three-wire, Single-phase, 120/240V, (2) #3/0 AWG-250 kcmil, (1) #2/0 AWG-500 kcmil
GTiN 00786849053192
Length 15 in
Color Black
Voltage 120/240 Volt
Type Main circuit breaker
Height 15 in
Weight 106 lb
Wire Size 00 AWG
Family Brand Name Eaton
Number of Phases 1 Phase
Amperage 400 Amp
Blade Dimensions 15.0000 IN X 24.0000 IN X 15.0000 IN
Bus Material Aluminum
Number of Wires 3
Interrupt Rating 65 kA
Feed Type Top/bottom
Applications Commercial / Institutional Buildings / Structures - Building Automation and Monitoring

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