If you mean electrical noise, there's some fast switching noise on the output as you might expect from a switching power supply, the amplitude stays the same but the frequency goes up with output voltage. It'll show up on a 'scope if there's no load, probably as a sequence of quick impulses with a decaying "ring", it's nowhere near as bad as a typical cheap switched PSU and any kind of load capacitance should mop it up. If you mean audible noise, it has a fan but that only comes on when it's hot. Without the fan running it's effectively silent, though some switching PSUs can emit a whistle at the switching frequency, if you get one with something physically able to vibrate inside and your ears are up to hearing that. My ears aren't bad and I've heard nothing from my one.

With ‎wps1203h style ‎120v/3a(360w) what is maximum current at 12v / 24v?

At both voltages, the max current is 10 amps.

How do I set constant current for it? It keeps reverting to 0 when i press output

Replicated your problem on my unit - once you have set your required voltage output and the maximum current limit setting for the item under test or being run you then push 'Output' .... BUT, if there is no active load attached to the power supply it will show the row of 'zero's' on the current readout after a couple of seconds or so.

When using the usb output is the current and voltage displayed so that you can use it as a usb power meter?

NO THERE IS NO VISUAL INDICATION THAT THE USB CIRCUIT IS ON OTHER THAN THE APPLIANCE ON CHARGE THE FRONT PANEL SHOWS ONLY POWER OUTPUT NOT USB.

Wps305h | Desertcart Cook Islands

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Description

⚡ Power your innovation with precision and style!

COMPACT POWERHOUSE - Lightweight 2.47 lbs design fits perfectly on any modern workspace.
ROCK SOLID SAFETY SUITE - Built-in OVP, OCP, SCP & thermal protection keep your projects and gear safe 24/7.
SMART USB FAST CHARGING - 18W USB port auto-adapts to your device’s fast charging protocol—declutter your bench.
PINPOINT PRECISION CONTROL - Ultra-fine 0.01V & 0.001A digital adjustments for flawless lab results.
SEAMLESS CC CV AUTO SWITCHING - Intelligent load detection switches between constant current & voltage modes effortlessly.

The NANKADF WPS305H is a compact, high-precision benchtop DC power supply delivering 0-30V and 0-5A with a crystal-clear 4-digit LED display. Featuring digital encoder adjustments, an 18W USB fast charging port, and advanced protection mechanisms (OVP, OCP, SCP, thermal), it’s engineered for electronics enthusiasts and professionals seeking reliable, space-saving power solutions.

Specifications

ASIN	B09C8MT4KM
Amperage	5 Amps
Best Sellers Rank	786 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 2 in Industrial Power Supply
Box Contents	Power supply, output cable, input cable,instruction manual
Brand Name	NANKADF
Colour	Black
Connector Types	usb
Country of Origin	China
Customer Reviews	4.5 4.5 out of 5 stars (1,055)
Enclosure Material	PE_(Polyethylene), PLA_(Polylactic_Acid), PS_(Polystyrene)
Form Factor	benchtop
Input Voltage	230 Volts
Item Dimensions	19 x 9 x 15 centimetres
Item Weight	1.46 Kilograms
Manufacturer	NANKADF
Manufacturer Part Number	WPS-10H
Maximum Power	150 Watts
Model Number	WPS305H
Number of Items	1
Number of Packs	1
Output Current	5 Amps
Output Voltage	30 Volts
Output Wattage	150 Watts
Product Warranty	1 Year Warranty Against Manufacturer Defects
Specification Met	UL
UPC	780279579727
Unit Count	1.0 count

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NZ$413

Duties & taxes included

In stock

Sold byAmazon Cook IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Cook Islands.

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WPS305H

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