Zhaoxin RXN-305D-II Linear Triple DC Power Supply (2x 0-30V 0-5A, 1x5V)

[pascal_sweden]

I found this cheap Chinese power supply from Zhaoxin. Is it any good?
http://smart-prototyping.com/Linear-Triple-DC-Power-Supply-RXN-305D-II--2x-0-30V-0-5A,-1x5V-.html

Shipping is about 22 USD with SF Express.

The pricing for this power supply looks too good to be true! =)

Zhaoxin on the other hand is a company that has a broad range of products, including more high-end stuff.

[pascal_sweden]

Here is a video about the power supply unit. Unfortunately it is in Polish, which I can't understand either, but at least it shows the unit in closer detail

https://www.youtube.com/watch?time_continue=3&v=dD6CCFfa1z8

[karoru]

It's a marketing video from guy that sells them, so don't expect to find any serious flaw discussion even after translating to Polish;) Nothing worth translating, just 'so this is knob to adjust voltage, this for current, and this light is for CC and this for CV' and so on commentary.

[pascal_sweden]

Yes, I know that it is a seller! But still I believe that this power supply unit looks quite good!
I don't need digital control or a color screen, just a reliable power supply with 3 floating output voltages.
If this power supply is reliable, it would fulfill my needs without breaking the bank

[pascal_sweden]

Nobody out there with this power supply in particular?

What about some other power supply from Zhaoxin? At least that would give some kind of indication

[wraper]

Many years ago I was foolish enough to buy 1 channel Zhaoxin PSU  . Arrived with broken pot. Disassembled to fix it and never used again once saw what's inside. Piece of shit. Pass transistors most likely will be fakes with tiny dies (mine were). No normal heatsink, tiny plate cooled by super noisy fan. Transformer probably will kill you one day because of overlapping primary and secondary wires (like in mine).

[pascal_sweden]

Thanks for your feedback! Then I will stay away from this supplier!

[pascal_sweden]

According to some forum users their Zhaoxin power supply has served them well over the years:
https://www.eevblog.com/forum/testgear/purchasing-a-lab-power-supply/msg198428/#msg198428

So it might be worth the risk to order the Zhaoxin RXN-305D-II for 99 USD + 22 USD for shipping with SF Express.

[hugatry]

According to some forum users their Zhaoxin power supply has served them well over the years:
https://www.eevblog.com/forum/testgear/purchasing-a-lab-power-supply/msg198428/#msg198428

So it might be worth the risk to order the Zhaoxin RXN-305D-II for 99 USD + 22 USD for shipping with SF Express.

I can select ~22 USD shipping option only when selecting Hong Kong or China in the checkout. 115-220 USD when selecting some European countries, USA or Australia 

[pascal_sweden]

I will check with the seller. They were very responsive on my last email.

[bitseeker]

@pascal: I'm seeing more and more of this brand these days. If you get one, I'm very interested to see what it's like inside.

[nctnico]

Check this thread:
https://www.eevblog.com/forum/reviews/beware-yihua-yh-305d-bench-psu/

To me it looks this PSU is sold under many (countless) different brand names including more respectable brands. It would be interesting to see if there are differences between the low cost versions and the more expensive ones.

[wraper]

To me it looks this PSU is sold under many (countless) different brand names including more respectable brands.

More respectable brands don't sell this PSU, they sell similar looking PSUs of this form factor with much better build quality.

According to some forum users their Zhaoxin power supply has served them well over the years:
https://www.eevblog.com/forum/testgear/purchasing-a-lab-power-supply/msg198428/#msg198428

So it might be worth the risk to order the Zhaoxin RXN-305D-II for 99 USD + 22 USD for shipping with SF Express.

Mine was like on this picture.  Do you really think that it can output 5A for prolonged times and don't blow up eventually with that parody of a heatsink inside.

[cqmiao]

Zhaoxin Power Supply is no good Don't buy.

[Jane]

@cqmiao: and which Chinese company is good so that I can buy a similar power supply?

[omgfire]

which Chinese company is good so that I can buy a similar power supply?

Keithley are made in China. 2231A-30-3 http://www.tek.com/sites/tek.com/files/media/media/resources/2231A%20PowerSupply_DataSheet_0.pdf
ITECH IT6302 http://www.aliexpress.com/store/product/FREE-SHIPPING-ITECH-IT6302-Programmable-DC-Power-Supply/1727580_32521768681.html

[pascal_sweden]

Nice power supplies from Keithley, but expensive if one does not need remote control.

A decent triple power supply with 2x30V-5A, 1x5V-5A, should not cost a fortune!
Still it does not seem to exist on the market.

Either you buy a Chinese power supply, with unreliable internals, or you have to buy an overpriced A-brand.

Even the Rigol and the Siglent power supplies are too expensive IMO.

[cqmiao]

@cqmiao: and which Chinese company is good so that I can buy a similar power supply?

By way of contrast?RIGOL is no bad?