This Triac dimmable LED driver 40W is engineered to deliver outstanding performance for 12V, 24V, 36V, and 48V constant-voltage lighting systems. Designed with phase-cut dimming technology, it works seamlessly with Lutron, Leviton, and most standard wall dimmers to provide smooth, flicker-free brightness control. With a maximum output of 40W and Class 2/Class P safety ratings, it meets UL/cUL, FCC, and CE certification standards. The driver is available in NEMA 3R versions, ensuring reliable performance in indoor and outdoor environments. Built-in protections—including short circuit, overload, over-voltage, and over-temperature—extend product lifespan and ensure safe operation. Its low-profile plastic or metal enclosure makes installation quick and flexible, ideal for LED strips, cabinet lighting, signage, billboards, and landscape lighting applications. This dimmable LED power supply offers exceptional compatibility, durability, and long-term stability for both residential and commercial lighting projects.
Features:
．PWM or Voltage Reduction output Selectable
．Compatible with Forward phase, Reverse phase, Triac, MLV, ELV Dimmers
． Super compact Aluminum case
． UL/cUL CE CLASS P FCC RoHS LPS
． NEMA 3R rated - Indoor or Outdoor Use
． Switch to color temperature LED Strips 100%-0.01% dimming flicker- free
． Auto-Reset Protection for input/output overvoltage protection, input/output overcurrent protection, over temperature protection, over power protection and short circuit protection
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MODEL |
KS-1240a-T |
KS-2440a-T |
KS-3640a-T |
KS-4840a-T |
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OUTPUT |
Output Voltage |
12V |
24V |
36V |
48V |
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Rated current x Channel |
3.3A |
1.67A |
1.1A |
0.83A |
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Rated power |
40W |
40W |
40W |
40W |
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Ripple & Noise (max.) |
200mVp-p |
250mVp-p |
250mVp-p |
250mVp-p |
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Voltage accuracy |
±2.0% |
±2.0% |
±2.0% |
±2.0% |
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Linear adjustment rate |
±0.5% |
±0.5% |
±0.5% |
±0.5% |
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Load adjustment rate |
±0.5% |
±0.5% |
±0.5% |
±0.5% |
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Start, rise time |
1000ms, 100ms/230VAC, 1100ms, 100ms/115VAC |
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Hold time |
10ms/115VAC, 230VAC |
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INPUT |
Voltage range |
100 ~ 277VAC |
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Frequency range |
47 ~ 63Hz |
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Power factor |
PF≧0 98/115VAC, PF≧0 95/230VAC , PF≧0.9 /277VAC, Full load |
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Total harmonic distortion |
THD< 20% (@ load ≧50%/115VC,230VAC; @ load ≧75%/277VAC) |
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Efficiency |
Vin: 115VAC |
≧90.55% |
≧90.78% |
≧91.28% |
≧91.78% |
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Vin: 230VAC |
≧91.38% |
≧91.56% |
≧92.06% |
≧92.56% |
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AC current |
0.55A |
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Inrush current |
Cold start 75A(width=350us measured at 50% l peak)/230Vac |
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Leakage current |
< 1 m A |
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No load/ standby power consumption |
< 3.6W |
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Protection |
Over current |
95 ~ 110% |
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95 ~ 110% Constant current limit, load abnormal condition can be removed after automatic recovery |
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Short circuit |
Burp mode, load abnormal conditions can be removed after automatic recovery |
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Over voltage |
13 ~ 16 V |
26 ~ 32 V |
39 ~ 47 V |
52 ~ 63V |
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Turn off the output voltage, restart and resume |
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Over temperature |
Turn off the output voltage, restart and resume |
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Environment |
Working Temp |
T case=-40 ~ +50℃ |
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Max.Case Temp |
T case=+90℃ |
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Working Humidity |
20 ~ 95% RH, non-condensing |
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Storage Temp.,Humidity |
-40 ~ +90℃, 10 ~ 95% RH |
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Temp.Coefficient |
±0.03%/℃ (0 ~60℃) |
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Vibration |
10~500Hz, 5G 12min./1 cycle, period for 72 min. each along X,Y,Z axes |
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Safety & EMC |
Safety standards:UL8750+UL1310 |
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Withstand voltage:I/P-O/P:1.88KVac |
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Isolation resistance:I/P-O/P:100MΩ/500VDC/25℃/70%RH |
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EMC EMISSION:Confirms to FCC |
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Dimming Connect Drawing:
Dimension Drawing:
