Microtest DC Bias Current Source (6210-6243H)

The Microtest 6210-6243H DC Bias Current Source series provides standalone, stackable DC bias modules for inductor and magnetic component characterization under real-world current loading conditions. Individual modules span current levels from 10 A to high-current configurations, and the stackable architecture allows engineers to combine multiple units for DC bias testing up to 640 A, covering everything from small signal inductors to high-current power inductors used in automotive DC-DC converters, server power supplies, and industrial motor drives.

Module Range

Model Series	Current Range	Typical Application
6210 / 6215	10 A – 40 A	Signal inductors, low-power magnetics
6220 / 6225	40 A – 100 A	Power supply inductors, telecom magnetics
6230 / 6235	100 A – 200 A	Automotive DC-DC converter inductors
6240 / 6243H	200 A – 640 A	EV traction inverter chokes, high-current bus bars

Stackable Architecture

Operating across 100 Hz to 10 MHz, these modules pair with Microtest LCR meters and impedance analyzers to measure inductance roll-off (saturation curves) as DC bias current increases. This characterization is essential for power inductor selection and validation: an inductor that meets its nominal inductance value at zero current may lose 30-50% of its inductance at rated current. The stackable design means a single investment scales with evolving test requirements, start with one module and add capacity as product current ratings increase.

Applications

Power inductor manufacturers, automotive magnetics suppliers, server power supply designers, and EV charger component producers all rely on DC bias characterization to verify inductor performance under load. The modular approach allows test laboratories to configure exactly the current capacity their application requires, without investing in a fixed high-current system from the start.

Watch the Microtest DC Bias Current Source (6210-6243H) on YouTube

GSAS Micro Systems provides the full Microtest DC Bias Current Source range to power electronics manufacturers, inductor producers, and automotive component suppliers across India with INR invoicing and application support. Engineers in Bengaluru, Hyderabad, Chennai, Pune, Mumbai, and Delhi NCR assist with module selection, stacking configurations, and integration with existing LCR measurement setups.