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Schneider Electric MG27121 - Supplementary Protector 20A 1-Pole (277/480V AC)

Schneider Electric
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Schneider Electric MG27121 Circuit Breaker is a Multi9 series supplementary protector designed for overcurrent and short-circuit protection in branch circuits. It operates at 277/480V AC with a current rating of 20A, featuring a compact thermal-magnetic trip mechanism for reliable performance. The unit weighs 0.11 lb and is constructed with durable thermoplastic housing, measuring approximately 1 inch per pole. It complies with UL 1077 and CSA C22.2 No. 235 standards for supplementary protection. Typical applications include industrial control panels, HVAC equipment, and lighting systems requiring branch circuit protection.

Key Features & Specifications
  • Type: Supplementary protector, thermal-magnetic, thermoplastic housing
  • Voltage Rating: 277/480V AC
  • Current Rating: 20A
  • Dimensions: 1 inch per pole width
  • Standards: UL 1077, CSA C22.2 No. 235
  • Applications: Industrial control panels, HVAC, lighting systems
  • Switch Type: Toggle
  • Configuration: 1-pole
  • Coil Voltage Maximum: Not applicable (thermal-magnetic)
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: 3.5 x 2.5 x 1.5 inches
  • Phase: Single
  • Voltage: 277/480V AC
  • Amperage: 20A
  • AIC rating: 10 kA at 277V AC
  • Connection: Screw terminals
  • Poles: 1
  • Protection: Overcurrent and short-circuit
  • Functions: Branch circuit protection
  • Frame Size: Miniature
  • Trip Type: Thermal-magnetic
  • Panel Type: DIN rail mount
  • Breaker Type: MG27121
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Copper alloy contacts
  • Panel Style: Standard
  • Bus Type: Not applicable
  • Fuse Class: Not applicable
  • Insulation Temperature: 105°C
  • Inductance: Not applicable
  • Impedance: Not applicable
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: DIN rail
  • Hz: 50/60
  • Coil Material: Not applicable
  • Horse Power: Not applicable
  • Aux Contacts: Not applicable
  • CPT: Not applicable
  • Full Load Amps: Not applicable
  • Dist Voltage: Not applicable
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: Not applicable
  • Full Load Amp Minimum: Not applicable
  • Enclosure: Open
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: 14-8 AWG
  • Amperage Maximum: 20A
  • Amperage Minimum: 20A
  • Nema Rating: 1
  • Switch Style: Toggle
  • Wire Size: 14-8 AWG
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: DIN rail
  • Terminal Connection: Screw
  • Frequency Rating: 50/60 Hz
  • Phase Connection: Single
  • Standards: UL 1077, CSA C22.2 No. 235
  • Compatible Frames: Multi9
  • Installation Type: Fixed
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: Miniature
  • Current Rating: 20A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not applicable
  • Peak Pulse Current: Not applicable
  • Breakdown Voltage (MIN VBR@IT ) (V): Not applicable
  • Breakdown Voltage (VBR@IT) (V): Not applicable
  • Polarity: Not applicable
  • Operating Temperature Maximum Celsius: 40°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: Not available
  • GTIN: Not available