Switchmode Power Supply 24-5




The SMPS24-5 is a fully regulated adjustable voltage power supply which incorporates a unity power factor correction capability, drawing sinusoidal input current from the mains supply with a power factor greater than 0.96 under most load situations. This feature optimises input power usage making the power supply suitable for alternative energy projects or other applications where efficiency is critical. The output voltage is normally preset at the factory. Please consult Customer Services for your voltage requirements when ordering.
Note: There are no user serviceable parts inside the power supply and it is extremely dangerous to remove the cover while the unit is switched on, as live circuitry inside may be exposed.
Stock Code
Output Voltage
SMPS 24-5
Nominal Output Voltage 27.6V DC
Output Ripple Voltage @ Full Load < 0.3%
Load Regulation (Zero to Full Load) < 3.0%
Line Regulation (220-240V) @ Full load < 0.1%
Output Voltage Adjustable Range 22-29V DC
Output Current Continuous 5A Max at 24V DC
  4.5A Max at Vout > 24V DC
Electronic Circuit Current Limit 4.5A DC (adjustable to 6A max) @ 0-28V DC output
Short Circuit Protection Duration Indefinite
Output Power Continuous 120W Max
Power Factor @ Full Load, 200V AC Input > 0.99
Frequency of Operation 88kHz (PFC 100Khz)
Input Fuse 2A Slow Blow 250V AC internally accessible
Efficiency > 75%
Thermal Protection Internal protection circuitry on board-fan cooled
Voltage limit indication Green LED
Current limit Indication Red LED
RFI Suppression Yes
Dimensions L - 225mm W - 155mm H - 65mm
Mains Input Nominal 230/240V AC 50/60Hz
Mains Input Range 200-250V AC 50/60Hz
Weight 1.8 Kg
The power supply is factory preset at the customer specified output voltage between 22 and 28V DC (usually 27.6V DC).
Mains input is via a 3-pin plug and flex; output terminals for + and - connections are provided outside the case. A battery trickle terminal is also provided, although the main output can be directly connected to a battery.
The power supply should be installed in a well ventilated area and not enclosed where excessive heat build up can occur. Do not install or mount above any hot air discharge/air-conditioner/radiator or similar equipment. Mounting outside or in a wet/damp environment is also not recommended.
Sealed and open lead acid batteries can be charged. Please specify nominal output float voltage and size of battery when ordering.