MCR100-8

Overview

The MCR100-8 is a sensitive gate silicon controlled rectifier (SCR) manufactured by Diodes Incorporated, designed for high-volume line-powered consumer applications. It features a peak repetitive off-state voltage of 600V and an on-state RMS current rating of 0.25A at +80°C. The device offers a high surge current capability of 9A and includes minimum and maximum values for gate trigger current, gate trigger voltage, and holding current to facilitate design. It provides immunity to dv/dt with a minimum rating of 20V/µs at TJ = +110°C. The component utilizes a glass-passivated surface for reliability and uniformity, ensuring compliance with RoHS directives.

Feature Summary

• Sensitive gate architecture enables direct triggering by microcontrollers and logic circuits
• Glass-passivated surface construction ensures reliability and uniformity
• High surge current capability supports demanding transient loads
• Defined minimum and maximum electrical parameters simplify circuit design

Applications

• Relay drivers
• Lamp drivers
• Small motor controls
• Gate drivers for larger thyristors
• Sensing and detection circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and packing quantity. Confirm that the selected variant meets all applicable regulatory requirements for your target market. Ensure proper handling procedures are followed during storage and assembly to maintain moisture sensitivity level ratings.

Selection Notes

Select this component when low gate trigger current is required for logic-level interfacing. Verify that the 0.25A RMS current rating and 600V blocking voltage meet the application's steady-state and transient requirements. Consider the SOT-23 package dimensions and thermal resistance characteristics for PCB layout and heat dissipation planning.

Part Context

This SCR belongs to the MCR100 series of sensitive gate thyristors from Diodes Incorporated. The series is engineered for cost-effective, high-volume production in consumer electronics. The MCR100-8 specifically denotes the 600V voltage rating variant within this family, sharing common packaging and feature sets with other voltage-rated versions.

Replacement Considerations

Cross-reference with other manufacturers' sensitive gate SCRs offering similar 600V blocking voltage and 0.25A RMS current ratings. Ensure pinout compatibility and matching electrical characteristics such as gate trigger current and holding current before substitution.

FAQ

What is the maximum gate trigger current specified for the MCR100-8?

The maximum gate trigger current (IGT) is specified as 50 µA under standard test conditions.

How does junction temperature affect the holding current?

The holding current increases with temperature; it is specified as a maximum of 5 mA at +25°C and 10 mA at -40°C.

What is the critical rate of rise of off-state voltage (dv/dt)?

The device has a minimum critical rate of rise of off-state voltage of 20 V/µs at a junction temperature of +110°C.