# Keithley 2651A High Power System SourceMeter Instrument # Keithley 2651A High Power System SourceMeter Instrument ## Key Features At A Glance - Source or sink 2,000 W of pulsed power (±40 V, ±50 A) and 200 W of DC power - Four-quadrant voltage and current source/load with precision voltage and current meters - 1 µs per point (1 MHz) continuous 18-bit digitizing sampling for transient characterization - 1 pA measurement resolution for precise low-level leakage current measurements - Pulse width programmable from 100 µs to DC with 1% to 100% duty cycle - Two units combinable via TSP-Link for ±100 A parallel or ±80 V series operation - LAN (LXI Class C), GPIB (IEEE-488), RS-232, USB host, and 14-bit Digital I/O for ATE integration - Includes TSP Express characterization software, LabVIEW driver, and Test Script Builder The Keithley 2651A is a High Power System SourceMeter Instrument in the Series 2600A family, designed specifically to characterize and test high power electronics. As a single instrument it combines a four-quadrant voltage and current source/load with precision voltage and current meters, allowing it to function as a semiconductor characterization instrument, a V or I waveform generator, a V or I pulse generator, a precision power supply, a true current source, a digital multimeter with 5½-digit resolution, and a precision electronic load. Applications listed for the 2651A include power semiconductor, HBLED, and optical device characterization and testing; characterization of GaN, SiC, and other compound materials and devices; semiconductor junction temperature characterization; high speed, high precision digitization; electromigration studies; and high current, high power device testing. The instrument is positioned to improve productivity in applications across the R&D, reliability, and production spectrums, including high brightness LEDs, power semiconductors, DC-DC converters, batteries, and other high power materials, components, modules, and subassemblies. ValueTronics has been a trusted source for new and pre-owned test and measurement equipment since 1992, operating from a 20,000 square foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Every instrument we sell — including high-power source-measure units like the 2651A — is processed, inspected, and tested at our own facility before it ships. That hands-on workflow is what distinguishes ValueTronics from drop-shippers and pass-through brokers: when a high-power SMU leaves our dock, our team has confirmed it is ready for the lab bench it is going to. ## Brand Heritage Keithley Instruments was founded in Cleveland, Ohio in 1946 and became a recognized authority in low-level precision measurement and source-measure instrumentation. Keithley was acquired by Danaher Corporation in 2010 and, following Danaher's 2016 separation of its industrial test and measurement businesses, is now part of Fortive Corporation alongside Tektronix. Keithley-branded SourceMeter instruments continue to be developed and supported under the Keithley name within the Fortive group. ## Accessories Supplied - 2651A-KIT-1A: Low Impedance Cable Assembly (1m) - CS-1592-2: High Current Phoenix Connector (male) - CS-1626-2: High Current Phoenix Connector (female) - CA-557-1: Sense Line Cable Assembly (1m) - 7709-308A: Digital I/O Connector - CA-180-3A: TSP-Link/Ethernet Cable - Documentation CD - Software Tools and Drivers CD ## Product Core & Specifications Category Specification Value Power Maximum Output Power (Pulse) 2,000 W (±40 V, ±50 A) Power Maximum Output Power (DC) 202 W maximum Power DC Voltage/Current Limits ±10.1 V @ ±20.0 A; ±20.2 V @ ±10.0 A; ±40.4 V @ ±5.0 A Power DC Current/Voltage Limits ±5.05 A @ ±40 V; ±10.1 A @ ±20 V; ±20.2 A @ ±10 V Power Operation Four-quadrant source or sink operation Pulse Minimum Programmable Pulse Width 100 µs Pulse Pulse Width Programming Resolution 1 µs Pulse Duty Cycle 1% – 100% Pulse Minimum Pulse Rise Time (50 A, 0.05 Ω) 25 µs (typical) Pulse Minimum Pulse Rise Time (50 A, 0.2 Ω) 57 µs (typical) Pulse Minimum Pulse Rise Time (50 A, 0.4 Ω) 85 µs (typical) Pulse Minimum Pulse Rise Time (20 A, 0.5 Ω) 90 µs (typical) Pulse Minimum Pulse Rise Time (50 A, 0.8 Ω) 120 µs (typical) Pulse Minimum Pulse Rise Time (20 A, 1 Ω) 180 µs (typical) Pulse Minimum Pulse Rise Time (10 A, 2 Ω) 330 µs (typical) Pulse Minimum Pulse Rise Time (5 A, 8.2 Ω) 400 µs (typical) Voltage Accuracy 100.000 mV Range Source Accuracy ±(0.02% rdg. + 500 µV); Programming Resolution 5 µV Voltage Accuracy 1.00000 V Range Source Accuracy ±(0.02% rdg. + 500 µV); Programming Resolution 50 µV Voltage Accuracy 10.0000 V Range Source Accuracy ±(0.02% rdg. + 5 mV); Programming Resolution 500 µV Voltage Accuracy 20.0000 V Range Source Accuracy ±(0.02% rdg. + 5 mV); Programming Resolution 500 µV Voltage Accuracy 40.0000 V Range Source Accuracy ±(0.02% rdg. + 12 mV); Programming Resolution 500 µV Voltage Accuracy Integrating ADC Accuracy (100 mV / 1 V) ±(0.015% rdg. + 300 µV) Voltage Accuracy Integrating ADC Accuracy (10 V / 20 V) ±(0.015% rdg. + 3 mV) Voltage Accuracy Integrating ADC Accuracy (40 V) ±(0.015% rdg. + 8 mV) Voltage Accuracy High Speed ADC Accuracy (100 mV / 1 V) ±(0.015% rdg. + 600 µV) Voltage Accuracy High Speed ADC Accuracy (10 V / 20 V) ±(0.015% rdg. + 8 mV) Voltage Accuracy High Speed ADC Accuracy (40 V) ±(0.015% rdg. + 15 mV) Current Accuracy 100.000 nA Range Source Accuracy ±(0.1% rdg. + 500 pA); Programming Resolution 2 pA Current Accuracy 1.00000 µA Range Source Accuracy ±(0.1% rdg. + 2 nA); Programming Resolution 20 pA Current Accuracy 10.0000 µA Range Source Accuracy ±(0.1% rdg. + 10 nA); Programming Resolution 200 pA Current Accuracy 100.000 µA Range Source Accuracy ±(0.03% rdg. + 60 nA); Programming Resolution 2 nA Current Accuracy 1.00000 mA Range Source Accuracy ±(0.03% rdg. + 300 nA); Programming Resolution 20 nA Current Accuracy 10.0000 mA Range Source Accuracy ±(0.03% rdg. + 6 µA); Programming Resolution 200 nA Current Accuracy 100.000 mA Range Source Accuracy ±(0.03% rdg. + 30 µA); Programming Resolution 2 µA Current Accuracy 1.00000 A Range Source Accuracy ±(0.08% rdg. + 3.5 mA); Programming Resolution 200 µA Current Accuracy 5.00000 A Range Source Accuracy ±(0.08% rdg. + 3.5 mA); Programming Resolution 200 µA Current Accuracy 10.0000 A Range Source Accuracy ±(0.08% rdg. + 6 mA); Programming Resolution 200 µA Current Accuracy 20.0000 A Range Source Accuracy ±(0.08% rdg. + 8 mA); Programming Resolution 500 µA Current Accuracy 50.0000 A Range Source Accuracy ±(0.08% rdg. + 50 mA); Programming Resolution 2 mA Source Noise (10 Hz – 20 MHz) <100 mV peak-peak (typical), <30 mV RMS (typical) Source Voltage Overshoot <±(0.1% + 10 mV) (typical) Source Current Overshoot <±0.1% (typical) Source Remote Sense Operating Range Max voltage between HI and SENSE HI = 3 V; Max voltage between LO and SENSE LO = 3 V Source Voltage Source Output Settling Time <50 µs best range Source Current Source Output Settling Time <80 µs best range Meter Maximum Load Impedance (Normal Mode) 10 nF (typical), 3 µH (typical) Meter Maximum Load Impedance (High Capacitance Mode) 50 µF (typical), 3 µH (typical) Meter Measure Input Impedance \>10 GΩ Meter Common Mode Voltage 250 VDC Meter Contact Check Built-in; 1 ms minimum measurement time; 5% basic accuracy Measurement Speed High Speed ADC Burst Rate Up to 1,000,000 readings/second (1 µs/point) Measurement Speed Minimum Measurement Range Change 143 µs Measurement Speed Minimum Source Range Change 2.5 ms Measurement Speed Minimum Source Function Range Change 1.0 ms Triggering Trigger In to Trigger Out 0.5 µs, typical Triggering Synchronization (single- or multi-node source change) <0.5 µs, typical General USB USB 2.1 Host Controller, supports external data storage General PC Interface IEEE-488.1 and .2; LXI Class C Ethernet; RS-232 General Digital I/O Interface 14 open drain I/O bits; 5.25 V max General Power Supply 100 V to 250 VAC, 50 Hz – 60 Hz (auto sensing), 550 VA max General Cooling Forced air; Side and top intake and rear exhaust General EMC Conforms to European Union EMC Directive **Important:** Active load operation caution: using the 2651A in combination with another System SourceMeter instrument or any other active load requires that the 2651A has the output off mode set to OUTPUT\_ACTIVE\_LOAD. See the 2651A Reference Manual for additional details.**Important:** Active Load Operation: Using the Model 2651A in combination with another System SourceMeter instrument or any other active load requires that the Model 2651A has the output off mode set to 'OUTPUT\_ACTIVE\_LOAD'. See the 2651A Reference Manual for additional details.**Important:** Current and Voltage Range Expansion: Two Model 2651A units can be combined in series or parallel to expand the operating ranges and power performance for some applications. Refer to www.keithley.com for the necessary application notes.Recommended pairing: combine two 2651A units via TSP-Link to expand the current range to ±100 A (parallel) or the voltage range to ±80 V (series), as described in the datasheet's expansion capabilities section. **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.** ## Details - **Price:** 31900.0 USD - **Vendor:** Keithley - **Type:** Sourcemeter - **Tags:** Keithley, Manufacturers, Meters & DAQ, product_manual_group_1, Product_new, Sourcemeter ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 31900.00 USD | In stock | ## Images - Keithley 2651A High Power System SourceMeter Instrument --- > Source: [ValueTronics](https://valuetronics.com/products/2651a-keithley-sourcemeter-new) > Updated: 2026-05-30