---
title: High-Voltage Reed Relays in Pre-Charge Circuits
---

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## Enabling Safe and Efficient High-Voltage Electrical Systems: High-Voltage Reed Relays in Pre-Charge Circuits

Test & Measurement

![detect-landing-page-s-block-mask-precharge-circuit](https://pages.standexelectronics.com/hs-fs/hubfs/Detect/detect-landing-page-s-block-mask-precharge-circuit.png?width=812&height=544&name=detect-landing-page-s-block-mask-precharge-circuit.png "detect-landing-page-s-block-mask-precharge-circuit")

![25-08_Application_Precharge Circuits_Page_1](https://pages.standexelectronics.com/hs-fs/hubfs/Detect/25-08_Application_Precharge%20Circuits_Page_1.jpg?width=500&height=647&name=25-08_Application_Precharge%20Circuits_Page_1.jpg "25-08_Application_Precharge Circuits_Page_1")

### Application

### Avoid the Spark—Power Up Safely! Design Smarter. Safer. More Efficient Pre-Charge Circuits.

High-voltage systems in EVs, Renewable Energy, and Energy Storage Systems demand more than just power—they require precision and protection. Without a proper pre-charge circuit, inrush currents can damage sensitive components and shorten system life.  
   
Discover how Standex’s KT Series Reed Relays offer a compact, fast-switching, and reliable solution to safely energize high-voltage systems. This application note dives into the problem—and delivers the solution.

Download our latest application note to learn how to design smarter, safer, and more efficient pre-charge circuits.

- Proven method to prevent costly damage during power-uplasting
- Key design considerations for selecting resistor and capacitor values
- Timing strategies to optimize charge duration and safety
- Technology comparison
- Real-world applications

Read the full application note to learn how to optimize your switching architecture.

 

Download the Application