Description
Chroma 63203A-150-300 DC Load Repair and Calibration
The Chroma 63203A-150-300 is a high-power programmable DC electronic load — a 150 V / 300 A high-current load (63200A high-power series) for testing power supplies, batteries, fuel cells, and EV components in CC, CV, CR, and CP modes. Its character is high-current sinking, so faults concentrate in the load (sink) power modules, mode control, and measurement — not the hipot/HV faults its category label implies.
June Company repairs and calibrates the Chroma 63203A-150-300 for high-power and EV test teams.
Common Chroma 63203A-150-300 problems we fix
- Won’t sink rated current/power — load power-module failure, repaired so it sinks full rated load.
- A mode (CC/CV/CR/CP) not working — mode-control faults, repaired.
- Dynamic/transient response off — the fast-slew circuitry, restored.
- Readback inaccurate — measurement drift, recalibrated.
- Cooling, programming, or protection faults.
FAQs
My high-power load won’t pull full current — fixable? Yes. Load power-module faults are repairable, then verified so it sinks full rated current and power in every mode, with a NIST-traceable certificate.
Are all modes verified? Yes — CC, CV, CR, and CP are checked against our standards.
Every repair includes NIST-traceable calibration and a 90-day parts-and-labor warranty. Email us or submit a service request.
Related Chroma repairs
We service 245 Chroma instruments. See all Hipot Tester Repair.




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