Products > Test Equipment
Help me choose a power supply
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tautech:

--- Quote from: mrjeff51 on April 20, 2023, 04:17:54 am ---
--- Quote from: tautech on April 18, 2023, 12:01:14 am ---
--- Quote from: mrjeff51 on April 17, 2023, 11:43:44 pm ---I know this question is probably posted a lot but none of the other posts were helpful. I am looking to purchase a linear single output power supply that can provide at least 30v and 5A, looking to spend under $400. I've been reading a lot of reviews and am getting even more confused. I've looked at the Korad KA3005P and Tekpower Tp3005T but the reviews on Amazon are all over the place.

The siglent spd3303x-e seems like a good choice except the outputs would probably have to be daisy chained to get 5A.

Not looking for DYI. What would you guys recommend? Preferably something not Chinese made but would be okay if it was decent quality.

--- End quote ---
SPD1305X meets your spec however SPD3303X-E provides additional channels and versatility albeit no single channel provides 5A, Parallel mode provides 6A but only to 30V however 60V @ 3A is available in Series mode.

https://siglentna.com/power-supplies/spd1000x-series-programmable-dc-power-supply/

--- End quote ---


When you say series and parallel mode, is that referencing output 1 and output 2 on a single siglent spd3303x-e or would I need two siglents? Also when in series or parallel mode, will the display show 60v or 6.4amps? Is there button for these modes on the device?

--- End quote ---
The 3ch SPD3303X-E had Parallel and Series mode buttons on the from panel whereas SPD1305X is a single channel PSU.
SPD3303X-E can do 60V @ 3A or 30V @ 6A plus the 3rd channel can still be operative.
Have a look at the little GIF on the HQ webpage:
https://int.siglent.com/products-overview/spd3000x/

The display leaves the operator to do the maths depending on which mode they are using, the reason being several units can be seriesed together for elevated voltages when the instrument wouldn't know how many are in use so the display only shows each channels output in any mode, normal, Series or Parallel.
mrjeff51:

--- Quote from: tautech on April 20, 2023, 04:29:25 am ---
--- Quote from: mrjeff51 on April 20, 2023, 04:17:54 am ---
--- Quote from: tautech on April 18, 2023, 12:01:14 am ---
--- Quote from: mrjeff51 on April 17, 2023, 11:43:44 pm ---I know this question is probably posted a lot but none of the other posts were helpful. I am looking to purchase a linear single output power supply that can provide at least 30v and 5A, looking to spend under $400. I've been reading a lot of reviews and am getting even more confused. I've looked at the Korad KA3005P and Tekpower Tp3005T but the reviews on Amazon are all over the place.

The siglent spd3303x-e seems like a good choice except the outputs would probably have to be daisy chained to get 5A.

Not looking for DYI. What would you guys recommend? Preferably something not Chinese made but would be okay if it was decent quality.

--- End quote ---
SPD1305X meets your spec however SPD3303X-E provides additional channels and versatility albeit no single channel provides 5A, Parallel mode provides 6A but only to 30V however 60V @ 3A is available in Series mode.

https://siglentna.com/power-supplies/spd1000x-series-programmable-dc-power-supply/

--- End quote ---


When you say series and parallel mode, is that referencing output 1 and output 2 on a single siglent spd3303x-e or would I need two siglents? Also when in series or parallel mode, will the display show 60v or 6.4amps? Is there button for these modes on the device?

--- End quote ---
The 3ch SPD3303X-E had Parallel and Series mode buttons on the from panel whereas SPD1305X is a single channel PSU.
SPD3303X-E can do 60V @ 3A or 30V @ 6A plus the 3rd channel can still be operative.
Have a look at the little GIF on the HQ webpage:
https://int.siglent.com/products-overview/spd3000x/

The display leaves the operator to do the maths depending on which mode they are using, the reason being several units can be seriesed together for elevated voltages when the instrument wouldn't know how many are in use so the display only shows each channels output in any mode, normal, Series or Parallel.

--- End quote ---

So on a 3 channel SPD3303X-E I should be able to get 48v @ 3A  or 50V @ 5.5 A if I needed to using series or parallel mode?
tautech:

--- Quote from: mrjeff51 on April 20, 2023, 04:57:23 am ---
--- Quote from: tautech on April 20, 2023, 04:29:25 am ---
--- Quote from: mrjeff51 on April 20, 2023, 04:17:54 am ---
--- Quote from: tautech on April 18, 2023, 12:01:14 am ---
--- Quote from: mrjeff51 on April 17, 2023, 11:43:44 pm ---I know this question is probably posted a lot but none of the other posts were helpful. I am looking to purchase a linear single output power supply that can provide at least 30v and 5A, looking to spend under $400. I've been reading a lot of reviews and am getting even more confused. I've looked at the Korad KA3005P and Tekpower Tp3005T but the reviews on Amazon are all over the place.

The siglent spd3303x-e seems like a good choice except the outputs would probably have to be daisy chained to get 5A.

Not looking for DYI. What would you guys recommend? Preferably something not Chinese made but would be okay if it was decent quality.

--- End quote ---
SPD1305X meets your spec however SPD3303X-E provides additional channels and versatility albeit no single channel provides 5A, Parallel mode provides 6A but only to 30V however 60V @ 3A is available in Series mode.

https://siglentna.com/power-supplies/spd1000x-series-programmable-dc-power-supply/

--- End quote ---


When you say series and parallel mode, is that referencing output 1 and output 2 on a single siglent spd3303x-e or would I need two siglents? Also when in series or parallel mode, will the display show 60v or 6.4amps? Is there button for these modes on the device?

--- End quote ---
The 3ch SPD3303X-E had Parallel and Series mode buttons on the from panel whereas SPD1305X is a single channel PSU.
SPD3303X-E can do 60V @ 3A or 30V @ 6A plus the 3rd channel can still be operative.
Have a look at the little GIF on the HQ webpage:
https://int.siglent.com/products-overview/spd3000x/

The display leaves the operator to do the maths depending on which mode they are using, the reason being several units can be seriesed together for elevated voltages when the instrument wouldn't know how many are in use so the display only shows each channels output in any mode, normal, Series or Parallel.

--- End quote ---

So on a 3 channel SPD3303X-E I should be able to get 48v @ 3A  or 50V @ 5.5 A if I needed to using series or parallel mode?

--- End quote ---
Too easy.
I have used 2 units in Series mode for 120V.
BillyO:

--- Quote from: mrjeff51 on April 20, 2023, 04:57:23 am ---So on a 3 channel SPD3303X-E I should be able to get 48v @ 3A  or 50V @ 5.5 A if I needed to using series or parallel mode?

--- End quote ---

For 50V @ 5.5A you would need 2 of them.

Do yo need 50V @ 5.5A?
Electro Fan:
Depends on your budget but for anywhere near $100 I'd go for the Korad KA3005D (unless you need the programmable/PC interface feature, then go with a KA3005P).  I have both a KA3005P and a KA3005D; IMO the KA3005D is among the best values you can find for ~$110 (on Amazon or at sra-solder.com).  In fact after about 10 years of TEA I'd say for ~$110 the Korad KA3005D is among the best values not just in power supplies, but in test equipment.

There are a bunch of Korad threads; here are a couple.
https://www.eevblog.com/forum/testgear/bench-power-supply-261782/msg3348756/#msg3348756
https://www.eevblog.com/forum/testgear/korad-3005p-calibration/msg4172872/#msg4172872
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