About the Siglent SPD4306X
In summary, the Siglent SPD4306X is a four-channel programmable linear DC power supply delivering up to 400 W total output. Channel 1 and Channel 2 are full programmable channels at up to 30 V and 6 A each, with independent or parallel / series tracking modes. Channel 3 provides a 5 V fixed-range auxiliary output up to 3 A, and Channel 4 provides a low-power auxiliary output up to 1 A. Per the datasheet, the SPD4306X provides 1 mV / 1 mA programming resolution, overvoltage / overcurrent / overtemperature protection on every channel, list / wave / delay sequencing on Channels 1-3, and a 4.3 inch TFT display.
What is the Siglent SPD4306X used for?
The SPD4306X is used for multi-rail DUT bring-up — powering a circuit's analog, digital, and auxiliary rails simultaneously from a single instrument — and for automated characterization sweeps where programmability over LAN, USB, or GPIB allows the supply to be stepped through a voltage or current profile by a test script. Linear regulation makes the SPD4306X a low-noise source, well suited to general-purpose multi-rail benches needing 30 V and meaningful current. Per the datasheet, programming resolution is 1 mV / 1 mA, output noise is typically 350 µV rms (CH1 / CH2), and load and line regulation are each under 0.01% + 3 mV. Standard channel-tracking modes include independent, parallel (sum of currents at single voltage), and series (sum of voltages at single current).
How does the SPD4306X compare to a switching DC supply?
Linear DC power supplies regulate the output by dissipating excess voltage as heat in a series-pass element. The result is very low output ripple and very low high-frequency switching noise — valuable for analog, RF, audio, sensor, and medical circuit work where supply-induced noise could mask the measurement of interest. The trade-off is lower efficiency and a larger, heavier chassis at comparable output power versus a switching supply. The SPD4306X is a linear supply, so it is the right choice when the customer needs clean DC for noise-sensitive measurement; it is not the right choice when the application is high-power motor or industrial loads, where a switching architecture would be more appropriate.
Where does the SPD4306X fit in an electronics lab?
- Multi-rail prototype bring-up: analog rail on Channel 1, digital rail on Channel 2, fixed 5 V logic on Channel 3, auxiliary bias on Channel 4 — from a single instrument with synchronized output enable.
- Automated characterization sweeps over LAN, USB, or GPIB (USB-GPIB adapter), with list / wave / delay sequencing programmed on Channels 1-3.
- Education benches and ATE fixtures that benefit from per-channel OVP, OCP, and OTP protection plus front-panel lock.
- Battery cycle test on small batteries, with internal resistance setting on the programmable channels.
- Low-noise R&D applications where ripple of approximately 350 µV rms is required.
Accessories Supplied
Per the manufacturer datasheet, the standard ship kit includes: a Quick Start guide, a region-appropriate AC power cord, a USB cable, and a set of binding-post test leads. Optional accessories include a rack-mount kit, an external trigger / digital I/O cable, a USB-GPIB adapter for IEEE-488 control, and SCPI / IVI driver downloads from the manufacturer.
Core Specifications
Channel Layout and Output Range
| Architecture |
Linear regulation, 4-channel programmable |
| Output channels |
4 channels: CH1/CH2 each 0-30 V / 0-6 A; CH3 0-5 V / 0-3 A; CH4 0-30 V / 0-1 A |
| Total output power |
400 W maximum |
| Programming resolution |
1 mV / 1 mA on all programmable channels |
| Readback resolution |
1 mV / 1 mA |
| Output isolation |
Channels are independently isolated; series / parallel tracking supported between CH1 and CH2 |
Regulation, Accuracy, and Noise
| Load regulation, voltage / current |
≤ 0.01% + 3 mV / ≤ 0.01% + 3 mA (CV / CC) |
| Line regulation, voltage / current |
≤ 0.01% + 3 mV / ≤ 0.01% + 3 mA |
| Programming accuracy, voltage / current |
≤ 0.03% + 10 mV / ≤ 0.1% + 5 mA |
| Readback accuracy, voltage / current |
≤ 0.03% + 10 mV / ≤ 0.1% + 5 mA |
| Output ripple and noise (rms) |
350 µV rms typ. (CH1/CH2) |
| Output ripple and noise (peak-peak) |
≤ 2 mV typical (CH1 / CH2) |
| Recovery time after step load change |
< 100 µs, 50% to 100% load step |
| Temperature coefficient |
≤ 50 ppm/°C (voltage), ≤ 100 ppm/°C (current) |
Protection, Sequencing, and Display
| Overvoltage protection (OVP) |
Per channel, settable across full range |
| Overcurrent protection (OCP) |
Per channel, settable across full range |
| Overtemperature protection (OTP) |
Internal sensor, automatic output disable |
| Front-panel lock |
Yes, prevents unintended adjustment |
| List / Wave / Delay sequencing |
Yes, on Channels 1-3; multi-step voltage / current profiles |
| Display |
4.3 inch TFT, multi-window per channel |
| Internal resistance setting |
Yes, programmable on CH1 / CH2 for battery-emulation work |
Interface, Remote Control, and General
| Front-panel controls |
Per-channel encoder, multi-window display, numeric keypad |
| USB / LAN |
USB Host + USB Device / 10/100 Base, RJ-45 |
| Digital I/O / external trigger |
Available via rear-panel connector |
| Remote protocols |
SCPI / LabVIEW / IVI; USB-TMC, VXI-11, Socket, Telnet; GPIB via USB-GPIB adapter |
| Dimensions (WĂ—HĂ—D, approx.) |
230 Ă— 142 Ă— 290 mm |
| Weight (net, approx.) |
approx. 7.6 kg (16.8 lb) |
| AC source |
100-240 V, 50/60 Hz; auto-sensing |
| Operating temperature / humidity |
0 to 40 °C; ≤ 80% RH at 40 °C, non-condensing |
| Safety / EMC / RoHS |
EN 61010-1; EN 61326-1; 2011/65/EU |
Note on Channel 3 and Channel 4 Behavior
Channel 3 is intended as a fixed-range 5 V auxiliary up to 3 A and is appropriate for powering a logic rail; Channel 4 provides a small auxiliary output up to 1 A for bias or pull-up rails. List / Wave / Delay sequencing is supported on Channels 1-3; Channel 4 is intended as a static auxiliary. Confirm channel assignments for the specific test application.
This webpage was written by a human with an A.I. "Intern", which may contain errors. Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.