Siglent SPD4323X 4 channel 240W power supply
The Siglent SPD4323X is a 4-Channel DC Linear Programmable Power Supply offers a total output power of 240W with a resolution of 1mV/1mA. The maximum voltage and current for each channel are as follows:
- CH1: 6V/3.2A
- CH2: 32V/3.2A
- CH3: 32V/3.2A
- CH4: 6V/3.2A
SPD4323X — 4-channel 240 W linear power supply
The SPD4323X puts four independently controlled linear outputs on the bench: two wide 0–32 V / 3.2 A channels for your main rails plus two 0–6 V / 3.2 A low-voltage channels for logic and sensor supplies — 240 W in total, in a 3U half-rack box no wider than a normal bench supply.
It is the highest-voltage member of the family: combine CH2 and CH3 in series for 60 V, or in parallel for 6.4 A. Every channel sets and reads back to 1 mV / 1 mA on a 5-digit display with ±(0.03% + 10 mV) accuracy, ripple stays at 600 µVrms, and the transient response recovers in under 50 µs.
Four rails you can actually watch
A display that shows every channel at once, and the tools to sequence and monitor them.
All four channels, five digits each
The 4.3″ colour TFT shows every channel simultaneously with a 5-digit voltage and current readout — set values, measured values and the CV/CC mode of each rail in one glance. Resolution is 1 mV / 1 mA with ±(0.03% + 10 mV) accuracy, so the number on screen is the number at the terminals. The 2W/4W indicator tells you at a glance which channels are running remote sense.
Real-time waveform view & recording
Plot voltage and current for all four channels against time and watch inrush, sequencing and load steps as they happen — then record the run to a CSV file on a USB stick. Combined with the list mode (50 steps per sequence, 8 stored sets), you can run a start-up profile or a margin sweep standalone and keep the evidence of what the rails actually did.
Independent, series or parallel
All four outputs switch on and off individually or together. Pair CH2 and CH3 in series for 60 V / 3.2 A or in parallel for 32 V / 6.4 A — the supply handles the master–slave tracking, and the terminals are labelled so the wiring is obvious.
List mode — test sequences without a PC
Enter voltage, current and duration per step — up to 50 steps, 8 stored sequences, with repeat count and continuous looping. Import a list from a USB stick for longer profiles. Power-cycle endurance, staged start-up and margin sweeps run standalone.
Web control — nothing to install
The embedded web server puts a full control panel in any browser on the network — set and read every channel, and even build list sequences. Handy for a supply in a rack, a screened room or a climate chamber. Full SCPI and a LabVIEW driver cover scripted control.
4-wire sense — connector included
The sense interface plugs into the rear terminal block and compensates up to 0.6 V of lead drop, so the voltage at your load is the voltage you set — the difference between guessing and measuring when real current is flowing. It ships in the box, not as an extra.
Key features
- Four independently controlled linear outputs — CH1 0–6 V / 3.2 A, CH2 0–32 V / 3.2 A, CH3 0–32 V / 3.2 A, CH4 0–6 V / 3.2 A
- Total output power 240 W · series 60 V / 3.2 A · parallel 32 V / 6.4 A (CH2 + CH3)
- 1 mV / 1 mA setting resolution with a 5-digit voltage and current readout per channel
- 4.3″ colour TFT with real-time waveform display — watch all four rails change over time
- Linear design: 600 µVrms ripple, < 50 µs transient recovery, ±(0.03% + 10 mV) accuracy
- Remote voltage sense compensates up to 0.6 V of lead drop on the high-current channel
- List mode — 50 steps per sequence, 8 stored sets, importable from a USB stick
- USB & LAN standard with an embedded web server — control from a browser, no software to install
Application examples
Analog and amplifier development
Two 32 V rails give you symmetric ±15 V or ±24 V supplies (series mode with a grounded midpoint) while the 6 V channels feed the digital side — all from one instrument, with 600 µVrms of ripple so what you measure is the circuit.
Mixed-voltage embedded boards
A modern board needs 3.3 V, 5 V, 12 V and often a 24 V rail. Four independent outputs cover them simultaneously, each with its own current limit, so a short on one rail does not take out the rest.
24 V industrial electronics
PLCs, sensors, relays and fieldbus modules run at their native rail with headroom to 32 V for tolerance testing — and the list mode steps the voltage automatically through the margin sweep.
Sequenced power-up testing
The list function runs up to 50 steps per sequence with 8 stored sets, so start-up ordering, brown-out and power-cycle endurance tests run standalone while the waveform view records what actually happened.
Automated racks
USB and LAN are standard with full SCPI and a LabVIEW driver, and the embedded web server lets a colleague check the supply from a browser without installing anything.
Every angle
The SPD4323X up close — note the remote-sense terminals and LAN port on the rear.
Specifications
| Output channels | 4 independently controlled linear outputs — CH1 0 – 6 V / 3.2 A · CH2 0 – 32 V / 3.2 A · CH3 0 – 32 V / 3.2 A · CH4 0 – 6 V / 3.2 A |
| Total rated output power | 240 W |
| Series mode (CH2 + CH3) | 60 V / 3.2 A — load regulation ≤ 100 mV |
| Parallel mode (CH2 + CH3) | 32 V / 6.4 A |
| Display | 4.3″ TFT-LCD (480 × 272) · 5-digit voltage & current · real-time waveform and timer views |
| Setting resolution | 1 mV / 1 mA |
| Voltage accuracy | ± (0.03% of reading + 10 mV) — programming and readback |
| Current accuracy | ± (0.3% of reading + 10 mA) — programming and readback |
| Ripple & noise (C.V.) | 6 mVp-p (20 MHz BW) · 600 µVrms (5 Hz – 1 MHz) |
| Transient response | < 50 µs to within 0.1% + 50 mV for a 50–100% load step |
| Remote sense | 2-wire / 4-wire — up to 0.6 V compensation on the high-current channel |
| List mode | 50 steps per sequence · 8 stored sequences · import from USB · timing accuracy < 50 ms |
| Protection | OVP 10–110% of rated voltage · OCP 0–110% of rated current |
| Connectivity | USB (Type A host + Type B device) · LAN · embedded web server · SCPI + LabVIEW driver · USB-GPIB optional |
| AC input | 100 / 120 / 220 / 230 V ±10%, 50/60 Hz — rear selector · max 470 W, 570 VA |
| Fuse | 100/120 V: T6.3A 250V · 220/230 V: T3.15A 250V |
| Dimensions & weight | 221 × 133 × 360 mm (3U half rack) · 12 kg |
From the official SPD4000X series datasheet (EN01C); subject to change, errors & omissions excepted.
In the box
Everything included as standard with your SPD4323X — including the 4-wire sense connector.
Accessories & related
The other two SPD4000X models share this chassis, display and control set — only the output ratings differ.
Trades voltage for current: 12 V at 10 A per channel (20 A in parallel) for automotive and motor work.
The flagship — 30 V at 6 A per channel and 400 W total, series to 60 V, parallel to 12 A.
19″ rack mount kit, 3U — holds two SPD4000X supplies side by side (instruments not included).
30 A rated leads for the high-current channels — the right cross-section when CH2 and CH3 run in parallel.
Not sure which SPD4000X fits?
Tell us the rails your product needs — voltages, currents and how many at once — and we will confirm which of the three models covers them with headroom.