Keysight (Agilent) 42843A Bias Current Cable

The Keysight (Agilent) 42843A Bias Current Cable is a shielded interconnect designed to apply DC bias current to a device under test during impedance analysis. It enables characterization of inductors, capacitors, and power components under realistic operating conditions by delivering controlled DC bias while impedance parameters are measured. The cable integrates into multi-component bias systems capable of supplying up to 40 A of DC bias current, making it essential for accurate L and C measurements on biased DUTs.

Technical Specifications

• Supported DC bias current: Up to 40 A


• Cable length: Approximately 960 mm


• Weight: Approximately 1200 g


• Operating temperature: 0 °C to 55 °C


• Shielding: Provides shielded connection to minimize interference and crosstalk

Key Features

• Shielded construction minimizes RF and electromagnetic interference during measurements


• Designed as a component within a larger bias measurement system, not a standalone instrument


• Electrical length compensation required when integrated into test fixtures


• Typical applications involve two 42841A bias sources, a 42842B fixture, and 16048A test leads connected to compatible LCR meters

Typical Applications

• DC-biased inductance measurements on power inductors


• Characterization of film and ceramic capacitors under bias conditions


• Impedance analysis of magnetic components requiring up to 40 A DC bias


• Component parameter extraction in realistic operating bias scenarios

Compatibility & Integration

• LCR meter compatibility: E4980A (Option E4980A-002), 4284A (Option 4284A-002), 4285A (Option 4285A-002)


• Bias source: Keysight (Agilent) 42841A


• Test fixtures: Keysight (Agilent) 42842A / 42842B


• Test leads: Keysight (Agilent) 16048A