Tektronix CPS250 DC Power Supply

The Tektronix CPS250 is a triple-output DC power supply engineered for benchtop electronic testing and development. It delivers one fixed 5V, 2A output and two independently adjustable 0–20V, 0.5A outputs, each capable of 10 W maximum power. The unit operates in both constant voltage and constant current modes, with variable current limiting to protect devices under test.

Technical Specifications

• Fixed output: 5V, 2A (constant voltage with foldback current limiting)


• Variable outputs (×2): 0–20V, 0.5A each (constant voltage/constant current)


• Maximum per output: 10 W Performance


• Voltage ripple and noise: 2 mV RMS (5 Hz to 1 MHz)


• Current ripple and noise: 3 mA RMS (5 Hz to 1 MHz)


• Load regulation (voltage): 5 mV


• Load regulation (current): 6 mA


• Line regulation (voltage): 10 mV


• Line regulation (current): 3 mA


• Series mode tracking error: ±0.2% ±20 mV Operating Modes


• Parallel: two 0–20V outputs combined to 0–20V, 1.0A maximum


• Series: two outputs combined to 0–40V, 0.5A or ±20V, 0.5A

Key Features Linear variable regulation uses LM723 voltage regulator ICs with BJT pass transistors for stable output. Dual analog meters provide switchable voltage and current monitoring across all outputs. Each output provides independent red (positive), black (negative), and green (chassis ground) terminals. Visual overload indicators alert users to fault conditions. Adjustable current limiting protects connected equipment without hard shutdown. The compact benchtop design includes a tilt-bail handle for portability.

Typical Applications The CPS250 suits laboratory circuit development, component characterization, and prototype power distribution where independent or combined output flexibility is required. The dual adjustable outputs enable simultaneous supply to multiple circuits with different voltage requirements.

Compatibility & Integration Input power: 110V, 60 Hz. Safety certifications: UL1244, CSA231, EN61010-1, Denturi Mark. CE and UL compliant.