36 VDC 9.7A 350W Regulated Switching Power Supply

Brand:| Model: PS-SP11156
This large 36 volt DC, 9.7 amp regulated power supply is capable of up to 350 watts of output. Switchable 90-264 volts AC input. UL recognized design.
  • Adjustable 32 to 40 VDC regulated output with 9.7A current capacity
  • Overload, over voltage, and over temperature protection built-in
  • Great for electronics projects, especially amplifiers
  • For use with electronics that demand up to 350 watts of power
Part # 
Weight: 2.2 lbs.  
List Price$77.99
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Buy 4-up$56.25
Part # 320-3141
Qty:  EA
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Product Details

36 VDC 9.7A 350W Regulated Switching Power Supply

This beast of a power supply is ideally suited for use with amplifier projects. With a regulated output of 36 volts DC, and current capacity of 9.7 amps, this power supply is the perfect partner for amplifier boards with of up to 350 watts of output on tap.

Voltage input can be switched for use with 110 or 240 VAC mains power. Overload, over voltage, and over temperature protection is built-in, shutting down the power supply to prevent damage and then restoring power upon recovery. Forced air cooling regulates temperature internally. Power cable included. UL recognized design. Output voltage is adjustable from 32 to 40 VDC.

Note: Minimum recommend power wire gauge is 16 AWG.

Specifications: • Input power: Switchable between 90-132 VAC and 180-264 VAC, 47-63 Hz • Output power: 36 VDC, 9.7A • Dimensions: 8.43" L x 4.5" W x 2" H.

36 VDC 9.7A 350W Regulated Switching Power Supply
  • BrandParts Express
  • ModelPS-SP11156
  • Part Number320-3141
  • UPC848864002798
  • Product CategoryPower Supplies
  • Unit of MeasureEA
  • Product Rating
    (2 Reviews)
  • Weight2.2 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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36 VDC 9.7A 350W Regulated Switching Power Supply
36 VDC 9.7A 350W Regulated Switching Power Supply is rated 4.0 out of 5 by 2.
Rated 4 out of 5 by from Check Your Input Voltage.Remember to check your input voltage. Mine shipped set to 230v. I didn't notice it. When I used it with a moderate load, a relay would start to click. I read "Aspeakerguy"''s review and realized I had the same problem. It wasn't until I read the comment below the review also written by "Aspeakerguy" did I found out I had made the same mistake. Once I corrected it, it worked great. Thank you "Aspeakerguy" for following up. It helped me a lot!
Date published: 2013-08-20
Rated 4 out of 5 by from Great little *** 32 *** volt supplyI bought this power supply to use with the 2x300W TAS5630 amplifier module. Bottom line: this is a reasonable unit if you understand, and can work within the limitations that this is really a 32-volt supply -- not 36-volts.I've looked at three of these supplies now, and they all behave identically.I've rated performance as "good", although if you set the supply to 32-volts I think it is actually good-to-excellent. Set the output to 36 or 40-volts and I would rate the performance "poor".The features are rated "good" because it is possible to adjust the supply to 32-volts where it performs quite well.By way of background, I'm an electronics engineer and expert in measurement science with over 30 years of experience.As I was evaluating one of these units, I noticed that a relay in the power supply kept clicking. It would click while loud music was playing and continue to click for a while after the music stopped. Sometimes the clicking would continue w/o stopping. I know enough about relays to know that this will lead to early relay failure, probably a few months or less if it continues. I don't know what that relay does, or why it is clicking, but that is NOT good.So, I got out the oscilloscope and had a look at the power supply output voltage. I've posted several screen shots here. There was a 10:1 resistor divider in addition to the oscilloscope probe, so these shots are all at about 10V/div instead of the 1V/div as indicated in the images.There is a voltage adjustment on the supply right next to the terminal strip. This supply was adjustable from about 31V to 41V or so. In these screen captures, the supply was set to different voltages as noted below.The first shot shows the power supply output when it was just continuously clicking at a 40V setting. The sawtooth waveform is about 4-volts peak-to-peak and was in sync with the relay clicking -- about 6 clicks per second. This behavior could also be observed with the supply set to 36-volts.The next shot shows a sample of the voltage waveform on an 8-ohm speaker (the Dayton 10-inch aluminum-cone woofer); this was driven by the TAS5630 amplifier module (one channel only) and was used as a dynamic power supply load for the rest of the waveforms shown below.I've got the RMS measurement function turned onand it indicates 1.20V RMS -- which is really 12V RMS because of the 10:1 divider. So on an 8-ohm speaker, that's nominally about 14 watts I'm pumping out. And by the way that was plenty loud. That also equates to about 1.5 amperes RMS -- which is less than 20% of the rated capacity of the power supply.The next shot is the power supply output with the 14-watt dynamic load (music) and the supply set to 36-volts. The main thing to note here is that the voltage dips down to a minimum of about 32-volts during the loud parts of the music.Next, same music level (different actual waveform...but same average power output level) with the power supply set to 41-volts. Again...the bottom end is dropping down to about 32-volts.Next, same music with supply set to 33-volts. Hmmm, bottom of drops are still about 32 volts.Finally, with the supply set at 32-volts. Rock solid...that's what it SHOULD look like. I don't understand why this supply seems to have a very STIFF lower limit at 32-volts, but with a highly dynamic load such as the TAS5630 amplifier board, there's not much point in setting the voltage any higher than 32-volts.And I almost forgot to mention -- at 32-volts the relay clicking is totally cured.So, in summary this is a decent power supply and worth the price...IF you run it at 32-volts. If you need more than 32-volts, try the 48-volt unit. I have not checked one of these yet but I'llbet the same story is true -- it probably needs to be run near the lower end of its voltage range for good load regulation.I plan on contacting the power supply manufacturer to get an explanation of both the clicking and poor load regulation above 32-volts.
Date published: 2013-04-24
  • 2015-03-02T06:29CST
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Product Q&A

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36 VDC 9.7A 350W Regulated Switching Power Supply

Hello would any one know the thermal abilities on one of these guys?  id love to put it on its side but i would hate to damage it long term.

Asked by: shanebou24
As long as the fan and ventilation openings are not obstructed this can be oriented in any direction.
Answered by: MattP
Date published: 2014-12-24

Hi!  I am using this with the 4x100W TDA7498 Class-D Amplifier Board.  The AC power plug/wire that comes with the unit is the wrong size for the power jack on the board (Power input jack: 2.5 x 5.5 mm, center-positive -~radioshack size "O"). Advice/link??

Asked by: z1sn
finally found the components at a different radioshack.  Had to solder my own wires to the size N (I think it was at least) barrel connector to create a power cable that fits with the TCA7498.  Works great!
Answered by: z1sn
Date published: 2014-10-20

Ok, please forgive my ignorance. I'm just trying to figure out whether I need multiple power supplies, or whether I can use a single power supply with step up/step down converters for each device being powered?

Asked by: StivVid
Please contact our tech support for more help with this question, tech@parts-express.com or 800-338-0531 x1.
Answered by: MattP
Date published: 2014-07-21

Could these power supplies be used to power multiple devices housed in one chassis?  For example: an amp, a raspberry pi/DAC combo, source selection relays with rotary control, and possibly an RIAA phono preamp?  All require different voltages.

Asked by: StivVid
Unfortunately this supply will only power devices with the same voltage requirement. A voltage regulator will be required for items with lower power input.
Answered by: MattP
Date published: 2014-07-21

This power supply has voltage tags but want a bit more info...

I assume L=line N=neutral but supplied plug does not have a wider neutral plug and narrow hot plug nor does it have a ground. Does input AC voltage need to be polarity correct?Does unit need grounding?Also, I see V+ and V-, is voltage the same along all three taps? Can this unit power more than one amp?Thanks !
Asked by: jdw2u
AC input on this amplifier is not polarized. This has multiple powered outputs for more than one device.
Answered by: MattP
Date published: 2013-07-09

Power Input?

I am making a amplifier with a few of the Class D boards and I will need one or two of these power supplies. Can I power more than one power supply off of one 120V line in or do I need to have a 120V line in for every power supply? Thanks.
Asked by: James M
You can wire two power supply 120 V inputs in parallel, with three separate jumpers: ground to ground, neutral to neutral, and hot to hot. But you would need a heaver gauge power cord, at least a 14 gauge. Do not wire the +36 volt power supply outputs together. Consider using a fuse on the power cord for your project.
Answered by: Cody
Date published: 2013-04-09
  • 2015-03-02T07:53CST
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