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Small rectangular metal box with five coloured wires exiting one side

GE

GE GEMH39-MCM-120 39W 120V Electronic Low Frequency Ballast

SKU CH-EVQB-VQ7FJ

A 39W 120V electronic low-frequency HID ballast with metal enclosure, 10 % line-voltage regulation and end-of-life protection

  • Consistent light output with 10 % voltage regulation
  • Quiet operation at 20 to 24 decibels
  • End-of-life protection safeguards the lamp
  • Compact 3.5 × 1.3 × 1.2 in metal case
  • Operates up to 55 °C ambient temperature

Application and Output

This electronic low-frequency ballast drives a single 39 W M130 metal-halide lamp at 120 V. It suits commercial or residential fixtures that require regulated high-intensity discharge lighting with normal-to-high ballast factor.

Thermals Noise and Power

The unit operates at a 130 Hz lamp frequency with line voltage regulation held within 10.0 %. Maximum ambient temperature is 55 °C and case temperature reaches 80 °C. Sound rating A corresponds to 20–24 decibels during normal operation.

Enclosure and Leads

A metal enclosure measures 3.5 in long, 1.3 in wide and 1.2 in high. Five colour-coded leads — green, white, red, brown and black — each exit the left side with a 6.0 in length, allowing direct wiring to standard household circuits. Maximum lamp distance is 8.0 ft.

How it compares

Measured against everything we stock in Lamp Ballasts & Drivers, at today’s prices. Recalculated every night.

Price $45.99
Cheaper than about 56% of the 265 comparable items (median $61.99).

Specifications

Product
Brand nameGE

Questions about this item

How do I install the GE GEMH39-MCM-120 ballast, and which wiring step is most often missed?

Connect the five leads — black, white, red, brown, and green — each 6.0 inches long, to the matching supply and lamp wires; the green grounding lead is the step most frequently overlooked.

What maintenance or replacement will this 39W electronic low-frequency ballast need over time?

The built-in End of Life Protection shuts the unit down when the lamp reaches end of life; at that point the ballast itself must be replaced, as it is not field-serviceable.

What is the first limit reached under sustained operation of this ballast?

The case temperature maximum of 80.0 °C is the primary thermal limit; ensure adequate airflow around the 3.5 × 1.3 × 1.2 inch metal enclosure to avoid triggering it.

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