Stanford Research PS325 – High Voltage Power Supply

The Stanford Research PS325 is a programmable high-voltage DC power supply engineered for laboratory research, sensitive instrumentation, and component testing. It delivers 0–5 kV DC at up to 20 mA with exceptional stability and low noise, making it ideal for precision experiments requiring tight voltage regulation and minimal ripple.

Technical Specifications

• Voltage: 0–5 kV DC


• Current: 0–20 mA


• Line Regulation: <0.001% FS (±10% input change)


• Load Regulation: <0.005% FS (0–100% load)


• Ripple & Noise: <10 mV peak-to-peak (typical <5 mV)


• Accuracy: ±1% of setting ±1% FS


• Setting Resolution: 0.1% FS


• Temperature Coefficient: <50 ppm/°C


• Input: 100–120 VAC or 200–240 VAC, 50/60 Hz (selectable)


• Input Power: <200 VA maximum Control & Protection


• Front-panel voltage adjustment with continuous control


• Analog programming: 0–5 V input for voltage and current


• Analog monitoring: 0–5 V output for voltage and current


• Interlock input for external safety shutdown


• Overcurrent, overvoltage (adjustable), short-circuit, and thermal protection

Key Features

• Rack-mountable 19-inch form factor (3.5 × 19 × 13 inches; 9 kg)


• BNC connectors for analog control and monitoring


• DB-9 interlock connector


• Forced-air cooling for continuous operation


• Output ON/OFF switch with dual voltage/current display

Typical Applications

• High-voltage component testing and characterization


• Laboratory research requiring stable kV-level excitation


• Electrostatic deflection and acceleration experiments


• Sensor and detector bias supplies

Compatibility & Integration Analog programming interfaces support external control via 0–5 V signals. The interlock connector enables safe integration into automated test systems with external shutdown capability. Operates across standard 100–240 VAC mains with <200 VA consumption.