The Agilent 6541A is a 200 W single-output DC power supply rated 0 to 8 V and 0 to 20 A at 40°C, part of the 6540 Series that also includes the 6542A (0–20 V/10 A), 6543A (0–35 V/6 A), 6544A (0–60 V/3.5 A), and 6545A (0–120 V/1.5 A). Each model in the family delivers the same 200 W output envelope at a different voltage/current ratio, allowing engineers to match the supply to the device under test rather than oversizing a single high-voltage unit for low-voltage work.

A DC power supply provides controlled, regulated direct-current power to a circuit, module, or assembly under test. Engineers use bench-class supplies like the 6541A to bias prototype designs, characterize component behavior across a voltage or current range, and verify that finished assemblies operate correctly within their specified input window. The 6540 Series is designed for both standalone bench use via the front panel and integration into automated test setups using its analog programming input.

ValueTronics International stocks tested DC power supplies — including the Agilent 6541A and other 6540 Series models — at our 20,000 square foot secure warehouse at 1675 Cambridge Drive, Elgin, Illinois. Equipment is inspected and performance-verified by our technicians before shipment, with condition documentation and warranty terms stated on every quote. We have served the test and measurement community since 1992, and unlike drop-shippers or pass-through brokers, the unit you receive is the unit our team handled — not a listing forwarded from an unverified source.

Brand Heritage

Hewlett-Packard's test and measurement business was spun out as Agilent Technologies in 1999. In 2014, Agilent's electronic measurement division was transferred to Keysight Technologies, which continues to support the legacy product lines documented under Agilent branding.

Compare Other Models in This Series

The Agilent 6540 Series comprises five 200 W single-output DC power supplies that share a common chassis, common protection feature set, and common control architecture, differing in their voltage and current ratings. Each model delivers the same 200 W output envelope at a different ratio: 8 V/20 A on the 6541A at the high-current end through 120 V/1.5 A on the 6545A at the high-voltage end.

All five models share the same programming accuracy class (0.06% + voltage offset on the voltage side, 0.14% + current offset on the current side), the same transient response specification (under 100 μs to recover within 0.1% of voltage rating following a step change up to 50% of rated current), the same ±240 Vdc floating capability, and the same three-year warranty. The choice between models is driven entirely by the voltage and current required by the device under test.

Each pre-owned model below is its own dedicated product page with condition-matched pricing, condition documentation where applicable, and the same warranty terms appropriate to its condition tier. Click the model that matches the voltage and current envelope your application requires.

The 6541A is the high-current end of the 6540 Series at 0–8 V and 0–20 A, with maximum current ratings of 18 A at 50°C and 17 A at 55°C. This voltage/current ratio matches digital logic, low-voltage analog, and high-current low-voltage test scenarios where the device under test draws substantial current at supply rails below 8 V.

Within the family, voltage ripple scales with voltage rating: 300 μV rms on the 6541A and 6542A, rising to 700 μV rms on the 6545A. Current ripple inversely scales: 10 mA rms on the 6541A at high current, falling to 1 mA rms on the 6545A at low current. Load and line regulation specifications track the same pattern, with tighter absolute voltage regulation on the lower-voltage models and tighter absolute current regulation on the lower-current models.

The comparison table that follows summarizes voltage range, current range, ripple, and regulation for each model in the family so the right match for a specific device-under-test power profile can be identified at a glance.

Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.

Product Core & Specifications

About this used unit

• Warranty included
• Functional verification included
• Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data.
• Note that unnecessary accessories may not be included (contact Test Architect to confirm).

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.