Siglent SPD1305X vs Siglent SPD3303C

Last updated: November 9, 2026

The Siglent SPD1305X rates 4.0 among single output bench power supplys; the Siglent SPD3303C rates 3.4 among multi-output ones. The Siglent SPD1305X costs $16 less ($328 vs $344).

Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.

Siglent SPD1305X vs Siglent SPD3303C

Scores side by side

These two sit in different type classes (single output and multi-output), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.

Factor weightSiglent SPD1305XSiglent SPD3303C
Overall rating4.0/53.4/5
Value 25%24 $2.19 per watt ($328, 150 W rated)33 $1.56 per watt ($344, 220 W rated)
Output quality 20%96 0.3 mVrms ripple and noise71 1 mVrms ripple and noise
Resolution 15%75 1 mV / 1 mA setting resolution25 10 mV / 10 mA setting resolution
PC control 15%100 USB, LAN with SCPI80 USB with SCPI
Protection & features 10%40 remote sense, stored setups20 stored setups
Warranty 15%100 3-year warranty100 3-year warranty

Specifications

Siglent SPD1305XSiglent SPD3303C
Output
TypePower supplyPower supply
RegulationLinearLinear
Channels13
Channel ratings30 V/5 A32 V/3.2 A, 32 V/3.2 A, 2.5/3.3/5 V/3.2 A
Max voltage30 V32 V
Max current5 A3.2 A
Rated power150 W220 W
Ripple and noise0.3 mVrms / 3 mVp-p1 mVrms
Precision
Setting resolution1 mV / 1 mA10 mV / 10 mA
Readback resolution1 mV / 1 mA10 mV / 10 mA
Remote senseYes-
Control
PC interfacesUSB, LANUSB
SCPIYesYes
Stored setups55
Build
Weight12.1 lb16.5 lb
Warranty3 years3 years

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