The Agilent N6731B is a 5 V, 10 A, 50 W basic DC power module for the Agilent N6700 Low-Profile Modular Power System (MPS) — a 1U-high, multiple-output programmable DC power supply system that gives test system integrators the flexibility to mix and match from over 30 different DC power modules. The result is a 1- to 4-channel DC power system that can be optimized to match a specific set of test requirements, letting engineers invest in high-performance outputs where speed and accuracy matter and basic outputs where simple, economical DC power is all that is needed. The N6731B itself is a single-slot basic module built on an advanced switching power supply design.

The N6700 MPS is built for automatic test equipment (ATE) systems in R&D, design validation, and manufacturing. Power supplies are a fundamental component of test systems across aerospace and defense, consumer electronics, computers and peripherals, communications, semiconductor, and automotive electronics — industries where complex ATE systems often require multiple power sources and where reducing occupied rack space and increasing test throughput are constant pressures. Within the family, precision modules are suited to semiconductor and passive device testing where a precisely controlled output and highly accurate measurements are needed, while the source/measure unit modules support applications such as battery drain analysis, functional test, and maximizing the battery life of battery-powered devices and their components.

ValueTronics stocks and holds its own test-and-measurement inventory in a 20,000-square-foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Every pre-owned unit is inspected and functionally verified in-house before it ships, while new units ship factory-sealed exactly as received from the manufacturer. Keeping inventory on hand and verifying used units in our own facility means an order can be filled quickly and with confidence in the unit's condition.

Brand Heritage

These instruments are branded Agilent Technologies. Agilent Technologies was formed in 1999 as a spin-off of Hewlett-Packard's test and measurement business; that electronic measurement business was subsequently established as Keysight Technologies in 2014, the brand under which this product line is carried forward today. Equipment bearing the Agilent name reflects this period of the brand's corporate history.

Compare Other Models in This Series

The N6700 Modular Power System is a single 1U platform built around three low-profile mainframes — the 400 W N6700B, the 600 W N6701A, and the 1200 W N6702A — each able to hold one to four DC power modules. Rather than a fixed-configuration supply, it is a user-reconfigurable system: integrators select from over 30 modules to assemble exactly the channel count, voltage, current, and performance grade a test station calls for. The same modules also run in the N6700C-series mainframes used for ATE.

The modules themselves fall into distinct series — basic DC power (the N6730 50 W, N6740 100 W, and N6770 300 W ranges), high-performance autoranging (N6750), precision (N6760), source/measure units (N6780), application-specific (N6783A), and electronic loads (N6790) — so a single mainframe can combine a high-power autoranging output with several economical basic outputs. Basic modules provide clean, economical DC power up to 150 V and up to 20 A; high-performance autoranging and precision modules add autoranging outputs, lower noise, and faster voltage changes, with available power up to 500 W; the precision series further provides dual programming and measurement ranges with 16-bit programming and 18-bit measurement precision and measurement down to the microampere region; the N6780 source/measure units add two- and four-quadrant operation, battery emulator/charger and CC/CV load functions, and highly accurate measurements down to nanoamperes; and the N6790 electronic loads offer 100 W and 200 W modules with constant voltage, current, resistance, and power modes.

The system can be purchased as a mainframe plus separate modules for self-assembly, or as a build-to-order N6710B, N6711A, or N6712A system shipped fully assembled. The same module catalog also serves the N6705 DC Power Analyzer bench mainframe (ordered as the N6705B/N6705C with separate modules, or the build-to-order N6715B/N6715C shipped fully assembled), allowing test correlation and program sharing between R&D and manufacturing.

Each pre-owned model below is its own dedicated product page with condition-matched pricing. Select the mainframe or module that matches your configuration, channel count, output rating, and interface needs to see its pre-owned availability and details.

The mainframes differ chiefly in total available output power — 400 W, 600 W, and 1200 W for the N6700B, N6701A, and N6702A respectively. Only the N6702A offers automatic AC-line power scaling: at turn-on it senses the available AC line power and limits output to 600 W so the 1200 W frame can be plugged into any standard outlet, drawing full 1200 W only when operated at 200–240 VAC with option 929. Output sequencing synchronization across multiple mainframes is supported on the N6700B, N6701A, and N6702A by wiring the rear-panel I/O ports together; it is not supported on the discontinued N6700A mainframe.

Among the modules, the differences are output rating (from 18 W up to 500 W), voltage and current range (0–5 V up to 0–150 V, and up to 50 A), ripple and noise, programming and measurement accuracy, quadrant operation, and which series each belongs to. Most modules occupy a single slot; the higher-power 300 W and 500 W autoranging and precision modules (N6753A–N6756A and N6763A–N6766A) and the 200 W load each occupy two of the four module slots. The comparison table below lays out these per-model ratings side by side so the right module can be matched to each output requirement.

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

Replaces: per the manufacturer, this model replaces 6621A, 6622A, 6623A, 6624A, 6625A, 6626A, 6627A, 6628A, 6629A.

N6731B Detailed Specifications

The following values are the published specifications for this N6731B module.

N6700 Family Module Specifications

The table below summarizes the key performance specifications of the DC power, autoranging, precision, source/measure, and application-specific modules across the N6700 family. For the precision (N6761A–N6766A) and source/measure (N6781A/N6782A/N6784A/N6785A/N6786A) modules, the values shown are for the highest output/measurement range; for the N6783A-BAT and N6783A-MFG modules, values are shown for the highest measurement range.

N6705 DC Power Analyzer Mainframe

The same N6700 modules also run in the Agilent N6705 DC Power Analyzer, a modular instrument that sources and measures DC voltage and current into a device under test. It combines one to four DC power supply or electronic load modules with the functions of a digital multimeter, oscilloscope, arbitrary waveform generator, and data logger in a single integrated unit, positioned by Agilent as an entirely new instrument category for R&D engineers. All sourcing, loading, and measuring functions are available directly from the front panel, giving insight into a device's power consumption without writing a single line of code. From the front panel an engineer can set up and view turn-on and turn-off sequences, measure and display voltage and current versus time to visualize power into the DUT, control DC bias supply or electronic-load ramp-up and ramp-down rates, generate DC bias transients and disturbances as arbitrary waveforms, and log data over seconds, minutes, hours, or even days to capture current and power consumption or anomalies. A common task is inrush current measurement: triggering the integrated oscilloscope on the DC output's on/off key in single-shot mode captures the current flowing into the DUT as the output turns on. While designed primarily as an R&D bench tool, it is fully programmable and LXI Class C certified, so it is also used in ATE systems for visualizing results as tests execute, for DUT troubleshooting, and for test development; it mounts in a standard 19-inch rack as a 4U instrument.

The N6705B mainframe is ordered together with separately boxed modules that you assemble yourself; the N6715B is the build-to-order configuration that ships as one mainframe with one to four installed modules. The later-generation N6705C and its build-to-order N6715C counterpart add a built-in digitizer to 200 kHz with up to 256 k samples per trace (512 k via SCPI) and roughly 30 kHz measurement bandwidth, 4 gigabytes of internal non-volatile storage, a built-in real-time clock, and data logging to internal or USB storage. Each N6705 mainframe provides four module slots, 600 W of total available output power, front-panel binding posts rated 20 A per post, and a power-management feature that allocates available mainframe power to the outputs where it is needed when the sum of installed module power exceeds 600 W.

Configuration, Options & Important Notes

Important: DC power and electronic load modules are not standalone instruments and require an N6700B/N6701A/N6702A (or N6700C/N6701C/N6702C) Modular Power System or an N6705/N6705C DC Power Analyzer mainframe to operate; modules are ordered separately from the mainframe. A power module's available capabilities depend not only on its own hardware but also on the hardware and firmware of the mainframe in which it is installed.

Important: Each module occupies one module slot, except the double-wide N6753A–N6756A, N6763A–N6766A, N6785A–N6786A, and N6792A modules, which each occupy two of the four mainframe slots.

Important: Installing a 500 W module in the 400 W N6700B mainframe may prevent that module from running at its full rated output power.

Important: When configuring a mainframe with fewer than four filled module slots, you must order a filler panel kit (N6708A); each kit contains three filler panels, and every empty module slot must be filled with a filler panel for proper operation.

Important: Rack mounting requires the rack mount kit (option 908 / N6709A); standard rack mount hardware, rails, or slides are not compatible with the N6700 because of its 1U size and airflow requirements. The N6700 vents from the sides only, so instruments can be mounted directly above or below it.

Important: For the N6702A 1200 W mainframe (and N6712A system), maximum output power is limited to 600 W at 100–120 VAC; AC mains rated at 100–180 VAC cannot supply enough current to power the mainframe at full rated power, so internal circuits limit module power to 600 W maximum at that input. To achieve full 1200 W output you must use option 929 and operate at 200–240 VAC.

Important: Option 760 (Output Disconnect/Polarity Reversal Relays) limits the output current to 10 A maximum on Models N6742B and N6773A, and is not available on Models N6741B, N6751A, N6752A, N6761A, N6762A, and N6781A–N6786A.

Important: Option 2UA (200 µA measurement range) is available only on Models N6761A and N6762A.

Important: Option LGA (large-size FPGA) must be ordered on the N6751A and N6752A modules; it is required to support output sequencing between multiple mainframes. Output sequencing synchronization across multiple mainframes is supported on the N6700B, N6701A, and N6702A mainframes; it is not supported on the discontinued N6700A mainframe.

Important: Output current is derated 1% per °C above 40 °C ambient temperature.

Important: Output terminal isolation: no output terminal may be more than ±240 VDC from any other terminal or chassis ground. When using the auxiliary measurement input terminals on the N6781A, no output or input terminal may be more than ±60 VDC from any other terminal and chassis ground. Maximum series operation is 240 V; maximum rated parallel operation is 100 A per N6705.

Important: For modules with outputs rated greater than 20 A (such as the N6753A or N6792A), high-current wiring must be routed through the N6705's rear panel; the N6705B mainframe provides rear-panel access ports for this (for an N6705A mainframe, order N6705U-057 to replace the rear panel).

Important: N6783A modules cannot be used in series with other N6783A modules or any other N67xx module.

Important: When sinking power, Model N6784A can operate at the maximum rated output power for only a limited amount of time; the unit monitors internal power device temperature and latches the output off if the safe limit is exceeded (annunciated by the OT status bit), after which a protect clear is required to resume operation.

Important: The N6791A and N6792A Electronic Load Modules are not supported on the previous N6700B, N6701A, N6702A, N6705A, and N6705B mainframes. Arbitrary waveform generation, scope view, and the related oscilloscope measurement capabilities apply only when the power modules are installed in an N6705 DC Power Analyzer.

Important: New modules N6753A and N6754A require mainframe firmware version C.02.00 or greater (available at www.agilent.com/find/N6700firmware). If you add modules with model numbers N673xA, N673xB, N674xA, N674xB, N6753A, N6754A, or N677xA to an N672xA, you will not be able to access the Agilent 662x command set for any installed modules; only SCPI commands will be accepted.

Important: Published current/power ratings for Models N6751A and N6752A differ between the datasheet's specification table (page 16: N6751A 50 V/5 A/50 W, N6752A 50 V/10 A/100 W) and the ordering tables (pages 19 and 21: both listed as 50 V/1.5 A/50 W); confirm the installed module's rating from the instrument before relying on maximum output.

Important: This data sheet does not include a comprehensive list of all power module specifications; complete performance specifications and supplemental characteristics for all power modules are in the Agilent/Keysight N6700 Modular Power System Family Specifications Guide, part number N6700-90001. Performance specifications for the N6780 Series 2-quadrant SMU modules (N6781A, N6782A) are in the separate N6780 Series Source/Measure Units (SMUs) Data Sheet, literature number 5990-5829EN.

Recommended pairing: the Agilent 14585A Control and Analysis Software controls the family's DC power and electronic load modules installed in up to four N6705 mainframes — as many as 16 modules — from a single PC, adding enhanced data visualization and management.

About this Pre-Owned unit

This pre-owned unit is inspected and functionally verified in-house before it ships and is backed by our pre-owned warranty. To confirm its exact condition, firmware revision, installed options, or included accessories for your application before ordering, contact our Test Architects.

• 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).

ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.

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.