What Is light control transformer？
A light control transformer is a specialized electrical device designed to provide stable, low-voltage power supply to lighting control systems, such as LED dimming panels, smart streetlight controllers, stage lighting, and building automation systems. It steps down or isolates input voltage (e.g., 220V/380V AC) to a safe, regulated low voltage (e.g., 12V, 24V, or 48V AC/DC), while ensuring electromagnetic compatibility (EMC) for flicker-free dimming and precise signal transmission. Unlike ordinary transformers, a light control transformer must maintain high linearity and low no-load loss under frequent switching and variable load conditions.
Working Conditions of the light control transformer
- Ambient Air Temperature: –50℃ to +40℃, with average value over 24 hours not exceeding +35℃
- Altitude: Installation site ≤2000m above sea level
- Relative Humidity: ≤50% at +40℃ ambient; at lower temperatures, higher humidity permitted
- Wet Month Condition: Monthly average maximum humidity 90% at average minimum
- Cooling & Installation: Natural air cooling (AN) with no external forced ventilation required
Product Parameters
| Model | Dim. Bmax | Dim. Dmax | Dim. Emax | A ± 0.7 | C (1.5) | K | J |
|---|---|---|---|---|---|---|---|
| BK-50 | 76 | 70 | 90 | 56 | 50 | 5 | 7 |
| BK-100 | 84 | 82 | 92 | 64 | 64 | 6 | 8 |
| BK-150 | 102 | 97 | 110 | 76 | 66 | 6 | 8 |
| BK-200 | 96 | 105 | 110 | 76 | 73 | 6 | 8 |
| BK-250 | 102 | 102 | 96 | 75 | 85 | 8 | 11 |
| BK-300 | 120 | 106 | 110 | 90 | 84 | 8 | 11 |
| BK-400 | 120 | 110 | 110 | 90 | 88 | 8 | 11 |
| BK-500 | 147 | 138 | 135 | 115 | 122 | 8 | 11 |
| BK-630 | 147 | 145 | 135 | 115 | 125 | 8 | 11 |
| BK-800 | 147 | 148 | 135 | 135 | 119 | 8 | 11 |
| BK-1000 | 147 | 158 | 150 | 135 | 122 | 8 | 11 |
| BK-1250 | 180 | 180 | 210 | 155 | 130 | 8 | 11 |
| BK-1600 | 180 | 200 | 210 | 155 | 145 | 8 | 11 |
| BK-2000 | 180 | 230 | 210 | 155 | 155 | 8 | 11 |
| BK-2500 | 180 | 230 | 235 | 155 | 155 | 8 | 11 |
| BK-3000 | 223 | 270 | 225 | 190 | 180 | 8 | 11 |
| BK-4000 | 255 | 260 | 280 | 205 | 150 | 8 | 11 |
| BK-5000 | 255 | 280 | 280 | 205 | 170 | 8 | 11 |
| Specification (VA) | Input Voltage (V) | Output (V) | BK Series Dimension L×W×H (mm) | BK Series Mounting L×W (mm) | JMB Series Dimension L×W×H (mm) | BKC Series Dimension L×W×H (mm) |
|---|---|---|---|---|---|---|
| 25 | 220 380 | 6 (6.3) 12 24 36 48 110 127 220 (380) | 79×72×88 | 64×47 | 150×160×130 | 57×82×82 |
| 50 | 87×88×96 | 70×57 | 150×160×130 | 70×88×100 | ||
| 100 | 105×94×110 | 84×68 | 150×160×130 | 80×100×105 | ||
| 150 | 105×100×110 | 84×74 | 160×170×135 | 86×100×125 | ||
| 200 | 120×116×134 | 95×80 | 160×170×135 | 105×100×136 | ||
| 250 | 120×124×134 | 95×90 | 130×210×155 | 105×100×136 | ||
| 300 | 134×137×150 | 110×100 | 210×230×175 | |||
| 400 | 134×150×150 | 110×110 | 210×230×175 | |||
| 500 | 155×155×164 | 125×114 | 218×290×185 | |||
| 700 | 155×170×164 | 125×128 | 218×290×185 | |||
| 1000 | 175×185×195 | 142×130 | 260×330×235 | |||
| 1500 | 175×200×195 | 143×140 | 260×350×235 | |||
| 2000 | 205×220×230 | 170×160 | 280×350×230 | |||
| 3000 | 230×210×240 | 190×155 | 360×355×280 | |||
| 4000 | 310×270×280 | 200×140 | 360×355×280 | |||
| 5000 | 308×240×310 | 510×450×430 |
Why Choose ZHIMING's light control transformer?
High Dimming Compatibility
ZHIMING's light control transformer is optimized for leading-edge and trailing-edge dimmers (TRIAC, 0–10V, DALI), delivering smooth, flicker-free brightness adjustment from 1% to 100%.
Ultra-Quiet Operation
Using high-grade silicon steel and vacuum varnish impregnation, our transformers keep audible noise below 25 dB(A), ideal for theaters, hotels, and silent rooms.
Compact & Thermal Efficient
Designed with minimal iron loss and copper loss, ZHIMING transformers operate at 40 K temperature rise max, ensuring long life even in tight enclosures like lighting poles or ceiling voids.
Overload & Short-Circuit Protection
Each light control transformer includes built-in thermal fuse and self-resetting PTC protection, preventing fire risks from lighting overloads or miswiring.
Global Compliance
ZHIMING models are certified with CE, RoHS, UL 5085, and EN 61558-2-13, suitable for commercial, residential, and industrial lighting control projects worldwide.
FAQ
Can a light control transformer be used for both constant voltage and constant current LED lighting?
ZHIMING offers dual-mode models: constant voltage (12V/24V DC) for LED strips, and constant current (350mA/700mA) for downlights. Please specify your application.
What is the typical standby power consumption?
Our light control transformer consumes <0.5W standby power at no load, meeting DOE Level VI and ErP Lot 2006/94/EC standards.
Is it compatible with smart home systems (Zigbee, Wi-Fi)?
Yes. ZHIMING transformers provide clean DC output with <50mV ripple, fully compatible with smart relays and wireless dimming receivers.
What insulation class do you use?
Standard Class B (130°C) or Class F (155°C) with double insulation between primary and secondary for safety extra-low voltage (SELV) compliance.
How do I choose the right power rating?
Add total lighting load (Watts) and multiply by 1.25. ZHIMING offers ratings from 20VA to 2000VA. For LED loads, derate by 20% due to capacitive nature.
