Application challenge
- Portable defibrillators require low standby power and reliable high-voltage charging-path control.
- Electrosurgical equipment combines high voltage, current and RF energy, raising insulation and patient-safety requirements.
- The switch must be compact but still maintain isolation and predictable timing.
Design approach
- Use the relay only within the medical equipment safety architecture; it is not a substitute for system-level isolation, monitoring or compliance testing.
- For electrosurgical circuits, evaluate RF behavior, heating and creepage distance in addition to DC voltage rating.
- For defibrillator charging paths, validate standby power, operate/release timing and high-voltage endurance over the expected maintenance life.
- Document relay lot, test conditions and derating in the medical device design history file.
Engineering caution: catalog ratings are component-level references. For high-voltage, medical, EV, PV or ATE systems, verify creepage, clearance, leakage, thermal rise, EMC and lifetime in the finished equipment.
Related MiRelay series
HVR high-voltage reed relays are referenced for defibrillator and electrosurgical high-voltage switching paths, with final selection by voltage, current, package and regulatory validation.
Series mentioned: HVR high-voltage reed relays