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GE
GE Lightech LET-75W-12V-RSL 75W 12V AC Dimming Ballast
A 75 W 12 V AC dimming ballast with 95 % efficiency, TRIAC dimming and auto-thermal regulation
- wattage75
- 75 W input power for low-voltage lighting loads
- 100 % dimmable with standard TRIAC dimmers, no acoustic noise
- 95 % efficiency at full load reduces heat and extends life
- Auto-thermal regulation cuts output above 90 °C, thermal cut-off at 125 °C
- Compact 33 × 63 × 20 mm aluminium housing fits tight spaces
Product Identity
The GE Lightech LET-75W-12V-RSL is a 75 W electronic transformer that steps 277 V AC input down to an 11.7 V output for low-voltage lighting circuits. It is intended for installers and specifiers who need a compact, dimmable ballast that integrates with standard TRIAC dimmers without audible noise.
Capacity and Headroom
Rated for a continuous 75 W input at a 0.95 power factor, the unit delivers a steady 6250 mA output current. Auto-thermal regulation proportionally reduces output voltage once internal temperature exceeds 90 °C, and a 125 °C thermal cut-off provides a final safeguard, so the transformer gracefully derates rather than failing abruptly under sustained overload.
Thermals Noise and Power
At full load the transformer operates at 95 % efficiency, which limits waste heat and allows the aluminium housing to stay cool within the 50 °C maximum ambient rating. Field-effect transistors replace older bipolar designs to eliminate switching whine, so the ballast remains silent even when dimmed deeply across the 50/60 Hz supply range.
Highlights
- 75 W input power for low-voltage lighting loads
- 100 % dimmable with standard TRIAC dimmers, no acoustic noise
- 95 % efficiency at full load reduces heat and extends life
- Auto-thermal regulation cuts output above 90 °C, thermal cut-off at 125 °C
- Compact 33 × 63 × 20 mm aluminium housing fits tight spaces
Specifications
| Brand | GE |
|---|---|
| wattage | 75 |
Questions about this item
Will the 277 V input connect to the 277 V supply feeding my existing low-voltage fixtures?
The unit accepts 277 V AC at 50/60 Hz with a 0.95 power factor and 0.27 A input current, matching the supply used by many commercial low-voltage runs.
How can I confirm the ballast is operating correctly once installed?
Measure 11.7 V AC at the blue output leads while the TRIAC dimmer is at full level; the output current should read 6250 mA when a 75 W load is connected.
What ships in the box and what must I source separately?
The transformer arrives with black and white input leads plus a blue output lead; you must supply the TRIAC dimmer, low-voltage lamps and any wiring connectors.
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