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HANMATEK DC Power Supply (0-30 V 0-5 A) HM305M Mini Variable Switching Digital Bench Power Supply
HANMATEK

HANMATEK DC Power Supply (0-30 V 0-5 A) HM305M Mini Variable Switching Digital Bench Power Supply

Bottom line: The HANMATEK DC Power Supply ($29.59 on Amazon as of 2026-10-06): 0-32V and 0-5.1A output covers most hobby bench work beyond the labeled 0-30V/0-5A range; main trade-off: 0.1V display resolution is coarse for fine analog work needing millivolt precision.

$29.59

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Buy on Amazon — $29.59 Compare to similar power supplies

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ 0-32V and 0-5.1A output covers most hobby bench work beyond the labeled 0-30V/0-5A range
  • ✓ Rotary encoder adjustment sets voltage and current faster than up/down button stepping
  • ✓ OVP, OCP and OPP limits are all user-settable, not fixed factory thresholds
  • ✓ Simultaneous three-digit readout of voltage, current and power on one panel

Cons

  • ✗ 0.1V display resolution is coarse for fine analog work needing millivolt precision
  • ✗ 5.1A ceiling rules out higher-draw loads like automotive or large motor testing
  • ✗ Switching regulator design carries more output ripple than a linear bench supply
  • ✗ Single output channel only, so dual-rail circuits need a second unit

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SpecPicks Verdict

SpecPicks scored HANMATEK DC Power Supply (0-30 V 0-5 A) HM305M Mini Variable… using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. HANMATEK's power supplies lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • ①New Upgrade: HANMATEK HM305M laboratory power supply adopts digital microcontroller control, switching voltage regulator technology, simple and convenient encoder adjustment method, which realizes precise adjustment, highly stable output, reliable and durable machine life.
  • ②Easy Operation: Three-digit display of voltage, current and power, voltage and current preset, start and stop command and key lock are available.
  • ③High Accuracy: Output voltage: DC 0-32V; Output current: DC 0-5.1A. Display resolution: Voltage: 0.1V, three-digit display; Current: 0.01A, three-digit display.
  • ④Multi-protection: Overvoltage protection OVP, overcurrent protection OCP, overpower protection OPP setting.
  • ⑤Package Content: HANMATEK HM305M laboratory power supply *1, power cord *1, manual *1, test cable *1.

Full Specifications

BrandHANMATEK
Wattage150 watts
Model NameHM305M
Model NumberHM305M
Connector TypeBarrel Jack
Cooling MethodAir
Output Wattage150 Watts
Item Dimensions3.15 x 5.91 x 9.06 inches
Mfr Part NumberHM305M
③High AccuracyOutput voltage: DC 0-32V; Output current: DC 0-5.1A. Display resolution: Voltage: 0.1V, three-digit display; Current: 0.01A, three-digit display.
②Easy OperationThree-digit display of voltage, current and power, voltage and current preset, start and stop command and key lock are available.
⑤Package ContentHANMATEK HM305M laboratory power supply *1, power cord *1, manual *1, test cable *1.
④Multi-protectionOvervoltage protection OVP, overcurrent protection OCP, overpower protection OPP setting.
Warranty Description12 Months Warranty
Maximum Input Voltage240 Volts (AC)
Minimum Input Voltage120 Volts (AC)
Item dimensions L x W x H3.15 x 5.91 x 9.06 inches
System Bus Connector TypeBarrel Jack
Connector Type Used on CableBarrel Jack

Ready to buy?

HANMATEK DC Power Supply (0-30 V 0-5 A) HM305M Mini Variable Switching Digital Bench Power Supply is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $29.59

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

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HANMATEK DC Power Supply (0-30 V 0-5 A) HM305M Mini Variable Switching Digital Bench Power Supply
$29.59
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