The Keysight 41420A is a high-power Source/Monitor Module (SMU) designed for semiconductor device testing within the 4142B Modular DC Source/Monitor Mainframe. This dual-slot module delivers precise voltage and current sourcing with simultaneous monitoring, supporting both DC and pulsed operation across demanding test applications. The 41420A sources ±200 V or ±1 A at maximum 14 W power, with measurement resolution down to 40 µV and 20 fA. Its fast pulse capability (100 µs minimum width) minimizes thermal drift effects, while Kelvin connections enable accurate low-resistance characterization. Compliance limiting and high measurement accuracy (0.05% voltage, 0.2% current) make it ideal for high-throughput DC semiconductor testers requiring reliable, repeatable performance.
## Technical Specifications
• **Source Voltage Range:** ±200 V
• **Source Current Range:** ±1 A
• **Maximum Power:** 14 W (DC or pulsed)
• **Voltage Measurement Resolution:** 40 µV
• **Current Measurement Resolution:** 20 fA
• **Voltage Accuracy:** Typically 0.05%
• **Current Accuracy:** Typically 0.2%
• **Minimum Pulse Width:** 100 µs
## Key Features
• Dual-slot architecture optimized for high-power semiconductor characterization
• Voltage sourcing with current monitoring or current sourcing with voltage monitoring
• Fast pulsed testing capability to reduce thermal drift in high-current applications
• Compliance limiting on output voltage and current
• Kelvin connections for remote sensing and elimination of lead resistance effects
• Triaxial and Kelvin triaxial cable support for low-leakage-current measurements
## Typical Applications
• High-power device characterization and parameter extraction
• Power transistor and MOSFET testing
• Diode and rectifier evaluation
• Thermal transient analysis via pulsed operation
• Low-resistance and leakage current measurement
## Compatibility & Integration
The 41420A integrates into the Keysight 4142B mainframe via dedicated module slots. The 4142B provides HP-IB interface for system control and data transfer. The 41420A can be combined with other 4142B-compatible modules—such as the 41422A HCU (±10 A) and 41423A HVU (±1000 V)—to extend measurement range to 20 A and 2000 V.
