What is the difference between the E3630A and the E3631A?

The Keysight Technologies (Agilent HP) E3630A is a manual analog triple-output power supply offering 35 W of total power with 3-digit LED displays and auto-tracking. The Keysight Technologies (Agilent HP) E3631A is an 80 W programmable triple-output power supply featuring digital interfaces (GPIB and RS-232), a Vacuum Fluorescent Display (VFD), and programmable control.

Are the outputs on the E3620A isolated?

Yes. The Keysight Technologies (Agilent HP) E3620A features two independent, isolated outputs. Each output can be floated up to 240 Vdc from chassis ground, allowing series or parallel configurations.

Do the E3632A and E3633A support autoranging?

No. The Keysight Technologies (Agilent HP) E3632A and Keysight Technologies (Agilent HP) E3633A use a discrete dual-range topology where the operator must manually or programmatically select the desired operating range.

Keysight E3600 Series Power Supplies

6 models with full specifications from Keysight Technologies (Agilent HP).

This guide covers the Keysight Technologies (formerly Agilent, HP) E3600 Series of linear benchtop and system DC power supplies. Engineered for low noise and stable power delivery, this family includes single-, dual-, and triple-output models designed for manual laboratory testing or automated test systems. Choosing the right E3600 model depends on your requirements for programmable remote control, total output power, channel isolation, and multi-range operation. The series spans analog manual bench units up to 200 W programmable system-ready instruments.

Output Configurations: 1, 2, or 3 channels
Maximum Power Output: 30 W to 200 W
Control Architecture: Analog manual or digital programmable (GPIB/RS-232)
Regulation Topology: Linear DC

Models in this series

Model	Type	Interfaces	Operating Temperature	Dimensions (W×H×D)
E3600 Series - 30-60W	Agilent HP	GPIB (IEEE-488.2) standard; RS-232 (some models)	0 to 40 °C	212.3 W × 132.6 H × 348.3 D mm
E3631A	Agilent HP	GPIB, RS-232	0 to 40 °C	212.6 × 132.6 × 348.3 mm
E3632A	Agilent HP	GPIB (IEEE‑488.2), RS‑232	0 °C to 40 °C	—
E3633A	Agilent HP	GPIB, RS-232	0 to 40	212.8 × 132.6 × 348.3
E3630A	Agilent HP	None (manual analog control only)	0 to 40 °C	213 mm × 91 mm × 318 mm
E3620A	Agilent HP	None (analog manual control only)	0 to 55 °C (current derated 3.3% per °C from 40°C to 55°C)	212.8 mm W × 88.1 mm H × 348.3 mm D

Remote Control and Programmability

The E3600 series is divided between manual, analog-controlled power supplies and digitally programmable models designed for automated integration.

Manual Models: The Keysight Technologies (Agilent HP) E3620A and Keysight Technologies (Agilent HP) E3630A do not feature digital programming interfaces. They rely entirely on front-panel analog controls, such as ten-turn potentiometers, making them suitable for manual benchtop circuit verification.
Programmable Models: The Keysight Technologies (Agilent HP) E3600 Series - 30-60W models, Keysight Technologies (Agilent HP) E3631A, Keysight Technologies (Agilent HP) E3632A, and Keysight Technologies (Agilent HP) E3633A include GPIB and RS-232 interfaces as standard (or as model-dependent options for certain 30-60W variants). These programmable models allow remote configuration and system integration via standard SCPI commands.

Channel Count and Output Capabilities

Depending on the device under test, you can select from single-, dual-, or triple-output configurations:

Single-Output: The Keysight Technologies (Agilent HP) E3600 Series - 30-60W provides a simple, dedicated channel with power capacities from 30 W to 60 W (such as the 30 W E3610A and E3612A, the 35 W E3611A, the 40 W E3614A, the 52.5 W E3616A, and the 60 W E3615A and E3617A). For higher power, the E3632A (120 W) and E3633A (200 W) offer dual-range single outputs.
Dual-Output: The Keysight Technologies (Agilent HP) E3620A is a 50 W supply featuring two independent, isolated channels (0 to 25 V at 1 A each) that can be connected in series or parallel to scale voltage or current.
Triple-Output: For powering analog and digital circuitry simultaneously, the manual Keysight Technologies (Agilent HP) E3630A (35 W) features one 0 to +6 V output and positive/negative 0 to 20 V outputs with auto-tracking. The programmable Keysight Technologies (Agilent HP) E3631A (80 W) offers a 0 to 6 V/5 A output alongside isolated ±25 V/1 A outputs.

Dual-Range and Power Scaling

To provide flexibility without requiring separate instruments, the E3632A and E3633A offer discrete dual-range outputs. This allows operators to trade maximum voltage for higher current capacity depending on the test profile.

Keysight Technologies (Agilent HP) E3632A (120 W): Can be set to Range 1 (0 to 15 V, 7 A) or Range 2 (0 to 30 V, 4 A).
Keysight Technologies (Agilent HP) E3633A (200 W): Can be set to Range 1 (0 to 8 V, 20 A) or Range 2 (0 to 20 V, 10 A).

Both models feature remote sensing terminals to compensate for lead-voltage drops, ensuring accurate voltage delivery directly at the load.

Frequently asked questions

What is the difference between the E3630A and the E3631A?: The Keysight Technologies (Agilent HP) E3630A is a manual analog triple-output power supply offering 35 W of total power with 3-digit LED displays and auto-tracking. The Keysight Technologies (Agilent HP) E3631A is an 80 W programmable triple-output power supply featuring digital interfaces (GPIB and RS-232), a Vacuum Fluorescent Display (VFD), and programmable control.
Are the outputs on the E3620A isolated?: Yes. The Keysight Technologies (Agilent HP) E3620A features two independent, isolated outputs. Each output can be floated up to 240 Vdc from chassis ground, allowing series or parallel configurations.
Do the E3632A and E3633A support autoranging?: No. The Keysight Technologies (Agilent HP) E3632A and Keysight Technologies (Agilent HP) E3633A use a discrete dual-range topology where the operator must manually or programmatically select the desired operating range.