Agilent/Keysight 6655A DC Power Supply

The Agilent/Keysight 6655A is a single-output DC power supply delivering 480 W across a 0–120 V, 0–4 A range. Designed for automated test systems and high-throughput production environments, this instrument combines precise voltage and current programming with exceptional transient response and low-noise output characteristics.

Technical Specifications

• Single output: 0–120 V, 0–4 A at 40°C (3.6 A at 50°C, 3.4 A at 55°C)


• Total power: 480 W Programming & Readback Accuracy (at 25°C ± 5°C)


• Voltage programming: 0.06% + 51 mV


• Current programming: 0.15% + 4 mA


• Voltage readback: 0.07% + reading offset


• Current readback: 0.15% + reading offset Output Quality


• Voltage ripple and noise (20 Hz–20 MHz): 700 µV RMS, 7 mV peak-to-peak


• Current noise: 2 mA RMS


• Load regulation: 1 mV (voltage), 2 mA (current)


• Line regulation: 0.5 mV (voltage), 2 mA (current) Response Characteristics


• Programming response: 15 ms rise/fall time (10–90%), 60 ms settling to 1 LSB


• Command processing time: 20 ms (GPIB-connected)


• Transient recovery: <100 µs to within 0.1% of rated voltage or 20 mV (whichever is greater) after 50% load step Resolution


• Voltage: 2 mV average


• Current: 15 mA average


• OVP accuracy: 160 mV

Key Features

• GPIB (IEEE 488.2) primary interface with SCPI command compatibility


• Analog control inputs for voltage and current programming


• Daisy-chain capability: up to 16 supplies via single GPIB address


• VXIplug&play driver support for test system integration


• Fast crowbar and mode crossover protection


• LCD readout with fan speed control to minimize acoustic noise


• Input: 1,380 VA (1,100 W at full load, 120 W no-load); 47–63 Hz

Physical Specifications

• Dimensions: 425.5 mm W × 132.6 mm H × 497.8 mm D


• Weight: 25 kg (net), 28 kg (shipping)

Typical Applications Automated test systems, semiconductor characterization, component screening, laboratory benchtop development, and production-level functional testing requiring stable, low-noise DC power with fast transient response.