Cutler Hammer MSH12A - Molded Case Switch 12A 600V AC
Cutler Hammer MSH12A - Molded Case Switch 12A 600V AC

Cutler Hammer MSH12A - Molded Case Switch 12A 600V AC

Cutler Hammer
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Cutler Hammer MSH12A is a molded case switch designed for primary circuit isolation and disconnection in industrial power distribution systems. It is rated for 600V AC maximum and carries a continuous current rating of 12 amperes, with a compact frame size suited for panelboard or switchboard mounting. The unit features a manually operated toggle mechanism with a visible break indicator, constructed with a thermoplastic housing and silver-alloy contacts for reliable performance. This switch complies with UL 489 and CSA C22.2 standards for branch circuit disconnects, ensuring safe operation under fault conditions. Typical applications include motor control centers, lighting panels, and auxiliary circuits in manufacturing facilities and commercial buildings.

Key Features & Specifications
  • Type: Molded case switch, manual operation, thermoplastic housing
  • Voltage Rating: 600V AC
  • Current Rating: 12A
  • Dimensions: Compact frame size
  • Standards: UL 489, CSA C22.2
  • Applications: Industrial power distribution, motor control centers, lighting panels
  • Switch Type: Toggle
  • Configuration: 1-pole
  • Coil Voltage Maximum: Not applicable (manual switch)
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: 3.0 x 2.0 x 2.0 in
  • Phase: Single
  • Voltage: 600V AC
  • Amperage: 12A
  • AIC rating: 10kA at 600V AC
  • Connection: Line and load lugs
  • Poles: 1
  • Protection: Overcurrent protection not integral
  • Functions: Circuit isolation
  • Frame Size: 100A frame
  • Trip Type: None (non-automatic)
  • Panel Type: Panelboard or switchboard
  • Breaker Type: Molded case switch
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: #14 to #4 AWG
  • Metal Type: Silver-alloy contacts
  • Panel Style: Flush or surface mount
  • Bus Type: Plug-on or bolt-on
  • Fuse Class: Not applicable
  • Insulation Temperature: 105°C
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: 1
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: 1.0 in
  • Clas: Not applicable
  • Mounting: Panel or DIN rail
  • Hz: 50/60
  • Coil Material: Not applicable
  • Horse Power: 1 HP at 600V AC
  • Aux Contacts: Not included
  • CPT: Not included
  • Full Load Amps: 12A
  • Dist Voltage: 600V AC
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 12A
  • Full Load Amp Minimum: 0A
  • Enclosure: Open type
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Copper or aluminum
  • Amperage Maximum: 12A
  • Amperage Minimum: 0A
  • Nema Rating: 1 (indoor)
  • Switch Style: Toggle
  • Wire Size: #14 to #4 AWG
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: Plug-on or bolt-on
  • Terminal Connection: Screw lugs
  • Frequency Rating: 50/60 Hz
  • Phase Connection: Single
  • Standards: UL 489, CSA C22.2
  • Compatible Frames: 100A frame
  • Installation Type: Fixed
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: 100A
  • Current Rating: 12A
  • 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: 786678242125
  • GTIN: