Click for larger image and other views Image is representative of the product family.

How can we improve our images or Product Specifications?

Other Documentation

Instek GPS-3303 195W Triple-Output Linear DC Power Supply, 30V, 3 Amp

Be the first to review this item


Product Specifications
Part Number
Item Weight
19 pounds
Power Source Type
100/120/220/230 Volts
Size Name
3 Channels, 195 Output Watts
Specification for this product family (See all  products)
Overall Height
145  millimeters
Number of Items
Overall Width
255  millimeters
Item Depth
265 millimeters
Brand Name
GW Instek

This item is no longer available

This item ships for FREE with 2-Day Shipping on orders over $50. (Details)

Want it delivered on Fri, May 8? Order in-stock items in the next 14 hrs 6 mins and choose One-Day Shipping at checkout.

  • Share

This item has already been added to

Update Quantity Cancel

Select a List Create New List

You can add a description later

Key Features

  • Linear power supply unit provides a constant source of DC voltage and current for powering and testing electronic devices
  • Two outputs supply adjustable voltage up to 30VDC and current up to 3 amp
  • Third output supplies fixed voltage of 5VDC and current of up to 3 amp
  • Fine and coarse adjustment of voltage and current output
  • LED screens show voltage and current readings for two outputs simultaneously, and the displays are readable in low light

Package Details

Shipping Weight: 19 pounds
Package Size: 14.9 x 14.3 x 10.2 inches

Product Description

The Instek GPS-3303 triple-output programmable linear DC power supply unit provides a constant source of DC voltage and current for powering and testing electronic devices. The power supply unit (PSU) has two adjustable outputs that each provide DC voltage up to 30V and current up to 3 amp. A third output provides a fixed voltage of 5VDC voltage and up to 3 amp current. Controls on the unit's front panel allow for fine and coarse adjustment of the voltage and current output of the two 0 to 30V outputs. LED screens show voltage and current readings for two outputs simultaneously, and the displays are readable in low light. The outputs can operate independently, and the two 0 to 30V outputs can be connected in series to supply more voltage or in parallel to supply more current. A power cord with a three-prong plug is included for connecting the PSU to a grounded outlet, and test leads are included for testing applications. A built-in cooling fan helps prevent overheating, and the fan automatically switches to a slower speed to produce less noise in low- or no-load conditions. Overload protection, reverse polarity protection, and an output on/off switch help prevent damage to the PSU and the device under test. For regulation, accuracy, and ripple and noise characteristics, see the unit's datasheet.

Number of outputs3
Maximum voltage and current output, outputs 1 and 2Voltage: 30VDC; Current: 3 amp
Voltage and current output, outputs 3Voltage: 5VDC; Current: 3 amp
Recovery time, outputs 1 and 2Less than or equal to 100 μs (microseconds) following a 50% load change with a minimum load of 0.5 amp
Tracking errorLess than or equal to 0.5% of output 1 reading + 10mV (millivolts)
Power requirements100V, 120V, 220V, or 230VAC + or – 10% at 50 to 60 Hz
Standards metEuropean Conformity (CE) marking
Dimensions145 x 255 x 265mm (H x W x D)

H is the vertical distance from lowest to highest point, W is the horizontal distance from left to right, and D is the horizontal distance from front to back.

Power supply units (also known as PSUs, AC power supplies, DC power supplies, and battery eliminators) provide AC or DC voltage to power or test devices such as tools, appliances, and electronic components. The PSU draws energy from a line source such as a wall socket and converts it to a constant, specified amount of voltage or current that is then outputted to a connected device. In general, a power supply unit will be classified as either a linear PSU (also known as a linear regulation or line-frequency PSU) or a switched PSU (also known as a switching-mode power supply, SMPS, or switcher). Typically, a linear PSU has a simpler design and provides a faster transient response time and less electrical interference and noise than a switched PSU. A switched PSU is often smaller, lighter, and more efficient than a linear PSU and generates less heat. The transient response time of a PSU indicates how quickly the PSU can resume the desired constant output after a sudden change in input. Ripple voltage or current indicates how much unfiltered noise and AC voltage or current is present at the output of a filtered power supply operated at full load. The temperature coefficient is the percent average change in output voltage per degree centigrade of change in ambient temperature. Fuses, current limiters, and other forms of overload protection can be built into the PSU to help protect against voltage spikes or short-circuiting.

GW Instek manufactures test and measurement equipment such as oscilloscopes, spectrum analyzers, signal testers, and video surveillance systems. The company, founded in 1975 and headquartered in Taipei, Taiwan, meets International Organization for Standardization (ISO) standards 9002 and 14001.

What's in the Box?
  • Instek GPS-3303 power supply unit
  • (2) GTL-104A test leads
  • (1) GTL-105A test lead
  • (1) GTL-203A European test lead
  • (2) GTL-204A European test leads
  • (1) GTL-201A European test lead
  • Power cord
  • Instructions

How can we improve our Product Description?

Customer Reviews

There are no customer reviews yet.

Be the first to review this item

Go to the HomePage

Order by Phone
M-F 8am-10pm ET, Sat-Sun 8am-5pm ET 800-220-4242

My Account| Returns| Help

Website Feedback| Contact Us| Sell on AmazonSupply| Become an Affiliate

Privacy Notice| Conditions of Use

Follow Us 

© 2015, Inc. and its affiliates.