Series:	--
Part Status:	Active
Triac Type:	Alternistor - Snubberless
Voltage - Off State:	600V
Current - On State (It (RMS)) (Max):	25A
Voltage - Gate Trigger (Vgt) (Max):	1.3V
Current - Non Rep. Surge 50, 60Hz (Itsm):	208A, 250A
Current - Gate Trigger (Igt) (Max):	80mA
Current - Hold (Ih) (Max):	100mA
Configuration:	Single
Operating Temperature:	-40°C ~ 150°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-220-3 Isolated Tab
Supplier Device Package:	ITO-220AB

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Thyristors - TRIACs

Introduction

Thyristors are a type of semiconductor device which are notable for their ability to control the switching of electrical current. Thyristors are three-terminal devices, usually operating as either a switch, or a controlled rectifier. Thyristors are available in a wide range of packaging options and designed for various applications. Of particular interest in this article is one specific type of thyristor, a device known as the TRIAC (Triode for Alternating Current).

What is a TRIAC?

A TRIAC is a three-terminal semiconductor switch which, when triggered, can switch Current in either direction. The device is non-polarized, meaning it doesn’t matter what polarity is applied to the terminals and the current can be switched from either direction. TRIACs are popularly used for controlling and switching AC circuits.

QJ6025LH6TP

The QJ6025LH6TP is a Thyristor designed and manufactured by China-based Jiaxing Qi Quan Electronics Co., Ltd. The device is marketed as an industrial grade device with superior performance, making it particularly suitable for use in high-reliability and mission-critical applications. The device comes in an industry standard T0-222SM package and is rated for a high working voltage, making it suitable for use in a number of demanding applications.

QJ6025LH6TP Application Field and Working Principle

The QJ6025LH6TP is primarily intended for use in lighting dimming and motor speed control applications, being designed and built with economical, safe and reliable performance in mind. The device is able to operate in a temperature range of -40°C to +125°C and can carry a current in the region of 0.6A.

Operation

The device utilises an all-silicon, low leakage gate structure which is able to provide consistent on/off switching performance. When the gate voltage exceed the specified switching threshold, the device is triggered, allowing current to flow in either direction depending on the polarity of the applied voltage. The switching of the current can then be rapidly terminated by reducing or reversing the polarity across the gate terminals.

Semiconductor Structure

The QJ6025LH6TP consists of three PN junctions, connected in series between the Gate and Main terminals. Initially all three junctions are reverse-biased (cut-off).When the Gate voltage is increased above the specified switching threshold, junction 2 becomes forward-biased, enabling current to flow from the Gate to the Main terminals. This process can be repeated for currents flowing in either direction, ensuring remanence and dv/dt immunity in both directions of current flow.

Summary

The QJ6025LH6TP is a three terminal semiconductor device designed and manufactured by Jiaxing Qi Quan Electronics Co. The device is suitable for a wide range of applications, most notably lighting dimming and motor speed control. The device is built using low leakage gate technology and is able to switch currents in either direction, providing a reliable and cost-effective device for industrial applications.

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