Switchmode Power Supply 12-20



The SMPS12-20 is a fully regulated adjustable output voltage power supply. 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 the cover may contact live circuitry inside.
Stock Code
Output Voltage
SMPS 12-20


Output Ripple Voltage @ Full Load < 0.5%
Load Regulation (Zero to Full Load) < 2.0%
Line Regulation (220-240V) @ Full load < 0.1%
Output Voltage Adjustable Range 11-14.5V DC
Output Current Continuous 20A Max
Short Circuit Current Limit 35A DC (approx)
Output Power Continuous 280W Max
Frequency of Operation 80kHz
Input Fuse 6A Slow Blow 250V AC internally accessible
Output Fuse 20A HRC Fuse internally accessible
Thermal Protection Internal protection circuitry on board
Mains Input Nominal 230/240V AC 50/60Hz (110V AC Possible)
Indication Lamp Power on LED
RFI Suppression AS/NZS 2064 Class A
Dimensions L - 370mm W - 175mm H - 87mm
Input Current @ 230V AC 2.3A rms
Weight 3.3 Kg

For 110V AC operation contact ETE.

The power supply is factory preset at the customer specified output voltage (usually 13.8 DC or 12V DC).
Mains input is via a 3-pin plug and flex; output terminals for + and - connections are provided outside the case.
The power supply is not recommended for float charging batteries above 60AH capacity (at C/20 rate).
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. Keep fan intake/output vents well clear of any material likely to block them.