S1200 Adjustable Output Power Supply (11V-24.5V, 50A, 1200W) by Junsi

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Frederick, MD

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This is the Junsi S1200 Adjustable Output Power Supply. The S1200 is one of the most advanced hobby grade power supplies available. 1200W of output is ideal for a variety of high powered chargers, and three outputs allows you to simultaneously operate a variety of 12V equipment. Plus, an input voltage range of 95 - 265V delivers worldwide compatibility with no modification required. The DC output voltage is adjustable using the adjustment knob on the front, and the output voltage and current are displayed on the digital readouts on the front, allowing you to identify the voltage and current at a glance.


  • Active PFC, AC 90-265V Voltage range for worldwide use
  • Programming output voltage from 11.5 to 24.5V
  • Digital display output voltage and current on-time
  • 3 outputs can operate multiple 12V items simultaneously
  • 3 intelligent cooling fans controlled by temperature
  • Over current, Over voltage, over load, over temperature and short circuit protection
  • 24 month manufacturers warranty

Input Voltage Range: 90 - 265V AC
Output Voltage Range: 11.5 - 24.5V DC
Input Frequency: 50/60Hz
Output Current: 0 - 50A (Max 55A)
Output Jack Range: 30A ea (do not exceed 30A per output)
Power: 1200W
Efficiency: 94% (@60% load and 220V input)
Operating Temperature: 14 - 113F (-10 - 45C)
Storage Temperature: -4 - 158F (-20 - 70C)
Over Protection: Voltage, Current, Load, Temperature
Cooling Method: Forced Air Cooling by Built-In DC Fan
Dimension (LxWxH): 286x145x68mm
Weight: 5.07lb (2.3kg) w/no Input Cable
EMC Standards: EN55022, EN61000-3-2, EN61000-3-3, EN55024
Safety Standards: EN60950-1

This product was added to our catalog on May 7, 2013.

Tim Pappas
Verified Owner
Wednesday, Mar 7 2018 (2 weeks ago)
Junsi S1200 Adjustable Output Power Supply (11V-24.5V, 50A, 1200W)
I really like this product but this review is more of a review for Amain Hobbies than the power supply itself. I bought a second one of these Junsi power supplies in November of 2017 because I really liked the first one I had bought from Amain over a year ago. Because of the holiday season and being busy with work and life, I didnt open up the charger until February of 2018, so I had it sitting in my office several months unopened. When I did open it up the power cord was missing one of the plug prongs. I called and spoke with Gabe at Amain who was awesome to deal with. Though it had been several months Gabe rounded up another power cord and shipped it to me. This is not the first time Amain has taken care of me, and is the reason I will keep buying from them! Thanks for the excellent customer service Gabe!)
lior metargem
Verified Owner
Friday, Jan 5 2018 (3 months ago)
Junsi S1200 Adjustable Output Power Supply (11V-24.5V, 50A, 1200W)
Excellent power supply
I bought it for the iCharger 406 Duo loader
I did not expect this. But surprisingly some is quiet and provide strong strength.
Advantages: It is possible to control the V, and to see how much amps it takes out while charging.
Another advantage is that the fan operates according to the temperature sensor only when it rises.
One drawback, a little big.
Beyond that, I highly recommend it!)
Victor Lietz
Verified Owner
Saturday, Dec 24 2016 (about a year ago)
Junsi S1200 Adjustable Output Power Supply (11V-24.5V, 50A, 1200W)
Power Supply came without any issues! Great product works amazing with my Hitec X2 400 pounds out 20A on both channels without any trouble! hopefully it last a long time)
Thursday, Jan 29 2015 (about 3 years ago)
Junsi S1200 Adjustable Output Power Supply (11V-24.5V, 50A, 1200W)
It's very powerfull power supply really . I used it with Junsi4010 work excellent . Make sure you get banana 4mm plug . Thanx)
Jordan Anderson
Verified Owner
Friday, Nov 21 2014 (about 3 years ago)
Junsi S1200 Adjustable Output Power Supply (11V-24.5V, 50A, 1200W)
Very solid power supply! I often have 3 chargers running off this supply at the same time and it's never had any issues.)
conald koontz
Verified Owner
Friday, Feb 13 2015 (about 3 years ago)
Junsi S1200 Adjustable Output Power Supply (11V-24.5V, 50A, 1200W)
Hay Guy's it me againRay,I got to tell U it's also a bad boy to,I have it wite the I charger4010.they go together like a hand and glory.lol)