277V Input (Single Tap)

M40L12-277 : 40W 12VAC 277V Input Magnetic Lighting Transformer

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Product Overview

Magnitude’s M40L12-277 LED Driver is the perfect choice for use in hospitals, schools, and shopping malls or for any commercial application that 277V is present. The Drivers are encased in a high-quality NEMA 3R enclosure that includes 2 knock-outs to enable easy installation. It is equipped with a push to reset breaker on the output for load protection.


  • Dimmable with any standard 277VAC MLV TRIAC dimmer switch
  • Push-to-reset breaker
  • ETL listed
  • Certified to CSA Standard
  • Class 2
  • Commercial Use
  • flicker-free
  • Nema 3R enclosure
  • Wiring compartment with 2 knock-outs for clean and easy installation

Driver Schematic

Driver Specifications

Max Load 40W
Input Voltage 277V AC
Input Current Full Load 0.36 A
Output Voltage Full Load 11.4V AC
Max Output Current Full Load 3.32 A
Open Circuit Output Voltage 12.5V AC
Avg. Efficiency 90.3%
Coil Former Double Section Bobbin
Maximum Ambient Temperature -30°C to 50°C
Minimum Installation Space Between Units 5" Inch
Thermal Class B130°c
Leads Primary PVC 600V #20
Leads Secondary PVC 300V #16
Circuit Breakers Secondary manual push-to-reset
Dimensions 5.6 x 2 x 2.14"
Weight 35 Oz.