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Precision Switching
For A High Voltage World

Global Manufacturer of High Voltage Reed Relays, Mercury Relays, and EV Contactors. Delivering Safety and Reliability to the World’s Leading Engineers.

20kV Isolation Voltage
IATF 16949 Certified
100M+ Units Produced
50+ Countries Served

The MiRelay Advantage

Why do Tier 1 Automotive and Test & Measurement companies choose us over the competition?

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Vertical Integration

We control the entire process. From Automatic Coil Winding to Vacuum Sealing and Dynamic Testing. This ensures consistent quality and faster lead times than competitors.

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Custom R&D

Need a special pinout? Higher voltage? Custom coil resistance? Our engineering team provides Custom Design Services to match your specific PCB requirements.

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Quality Certified

We operate under strict ISO 9001 and IATF 16949 automotive standards. Every relay undergoes 100% dynamic contact resistance testing before shipment.

ESM Series 1500V Contactor
New Arrival
For EV & Solar

ESM Series: 1500V Ceramic Contactor

The safest solution for next-generation Solar Inverters and EV Pre-charge circuits. Our Ceramic Brazing technology ensures zero arc leakage in a compact footprint.

  • Switching Voltage: 1500V DC Max
  • Compact Size: Low Noise Structure
  • High Insulation: 1000 MΩ @ 1000V
View ESM Datasheet
Mercury Wetted Relay
Specialty Tech

Mercury Wetted Relays: Zero Bounce

Essential for Semiconductor ATE and High Speed Pulse generation. Our Mercury contacts provide a self-healing interface that eliminates signal chatter entirely.

  • Zero Contact Bounce (Perfect Signal)
  • 100A Pulse Current Capability
  • Billions of Operations Life Cycle
View Mercury Series
20kV High Voltage Relay
Best Seller

HVR Series: 20kV Isolation

The backbone of Cable Testers and Hipot Safety equipment. We offer industry-leading isolation voltages up to 20,000V with Tungsten contacts.

  • 10kV Switching / 20kV Isolation
  • Tungsten Contacts for High Load Switching
  • Drop-in Replacement for Standex/Pickering
View HVR Datasheet

Powering Key Industries

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Electric Vehicles

BMS & Charging Piles 🔬

Semiconductor ATE

Wafer Probing & Testing 🩺

Medical Devices

Defibrillators & RF Ablation ☀️

Renewable Energy

Solar Inverters & ESS

State-of-the-Art Manufacturing

Located in Shanghai, our automated facility sets the standard for relay production.

▶ Watch Factory Tour

Using Standex, Coto, or Pickering?

Send us their part number. We will provide a Cross-Reference Specification and a competitive quote within 24 hours.

Request Cross Reference