Harvard CL1000S-240-C

CL1000S-240-C Technical Data

Part number CL1000S-240-C
Mains input voltage range 198 to 265V ac rms
Mains frequency 47 to 63Hz
Power factor at full load >0.95 (0.98 typical)
Efficiency at full load 88% typical
Mains surge protection 3.75kV common-mode 2kV differential
Input-output isolation 4kV ac rms
Ambient temperature range -25°C to 50°C
Maximum Tc temperature 80°C
Humidity 95% max non-condensing
Thermal trip 110°C self-resetting
Maximum output power 33W 33W 25W

Output current (switchable) 500mA & 1000mA
Output current accuracy ±5%
LED string voltage 9V to 48V (33V at 1000mA)
Typical no. of LEDs (1-3W) 3 to 14(8 at 1000mA)
Open-circuit output voltage 55V maximum
Enclosure White polycarbonate UL94-V0 rated
Current ripple
10V output = 38%
33V output = 14.5%
Wire size 0.5 to 1.5mm²
Weight 120g
Compliant standards EN 61347-2-13 EN 6100-3-2 EN 6100-3

Constant current (CC) LED drivers are specialized power supplies that maintain a fixed current (measured in mA or A) across a range of output voltages, ensuring consistent LED brightness and preventing thermal runaway. Ideal for high-power series-wired LEDs, they adjust voltage to keep current stable, increasing LED lifespan.

Key Aspects of Constant Current LED Drivers:

Operation: CC drivers vary the voltage output to maintain a constant current flow. As the load (number of LEDs in series) increases, the driver increases voltage to maintain the same current.

Application: Used for high-power LEDs, street lighting, retail display lighting, and architectural, accent, or task lighting.

Wiring: Components must be connected in series.

Key Specifications: When selecting, you must match the driver’s output current (mA) to the LED’s requirements and ensure the total LED voltage wattage falls within the driver’s operating range.

Benefits: Prevents flickering, protects against overheating (thermal runaway), ensures consistent color and brightness, and extends the life of the LEDs.

Difference from Constant Voltage (CV):

While CC drivers keep current steady for high-power LEDs, constant voltage drivers (typically 12V or 24V DC) are designed to provide a fixed voltage, commonly used for LED strips.

Harvard Technology was a UK-based company specializing in smart lighting solutions, including LED drivers, light engines, and wireless control systems like the LeafNut and EyeNut systems. The company’s original business faced administration, but its assets were acquired and its products, particularly LED drivers and sources, are now sold under the new entity, Harvard Power Systems, which is part of the Gallant Lighting Group. The original company was known for pioneering early wireless smart lighting technology for both indoor and outdoor applications.