MASMCGLCE18A Circuit Protection

Voltage - Clamping (Max) @ Ipp:	29.2V
Supplier Device Package:	SMCG (DO-215AB)
Package / Case:	DO-215AB, SMC Gull Wing
Mounting Type:	Surface Mount
Operating Temperature:	-65°C ~ 150°C (TJ)
Capacitance @ Frequency:	100pF @ 1MHz
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	1500W (1.5kW)
Current - Peak Pulse (10/1000µs):	51A
Series:	Military, MIL-PRF-19500
Voltage - Breakdown (Min):	20V
Voltage - Reverse Standoff (Typ):	18V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

MASMCGLCE18A is a type of TVS (Transient Voltage Suppressor) diode designed and manufactured by International Rectifier, a company specialized in designing and manufacturing analog and mixed-signal integrated circuits. This device operates as a clamping circuit that limits the voltage between two nodes, or between a node and ground, to a set voltage. MASMCGLCE18A is an ideal choice for applications where high reliability and protection against electrical transients is needed. This article will discuss the application field and working principle of MASMCGLCE18A.

Application Field of MASMCGLCE18A

MASMCGLCE18A is ideal for applications which require transient voltage protection against power line surges, lightning strikes and other transient voltage events. It is designed for applications which operate between -55 °C and +150 °C and supply voltages up to 15 V for industrial and automotive applications. The device is commonly used in telecommunications, cable/broadband, computers, consumer electronics, automotive, and industrial control/instrumentation systems. Additionally, it has the capability to protect against lightning-induced voltage transients. It can be used in voltage-sensing circuitry, signal-switching circuits, and over-voltage protection circuits.

Working Principle of MASMCGLCE18A

The working principle of MASMCGLCE18A is relatively simple. The device consists of two N-channel MOSFETs connected back-to-back. One MOSFET conducts current in one direction and the other conducts current in the opposite direction. When a voltage transient greater than the breakdown voltage of the device is applied, the two MOSFETs conduct current simultaneously. This draws current through the parasitic diode associated with the MOSFETs and clamps the voltage to the breakdown voltage of the device.When a voltage transient less than the breakdown voltage of the device is applied, the two MOSFETs are turned off; however, the parasitic diode associated with the MOSFETs is still conducting current, thus providing a path for the transient voltage to the ground. This ensures that the transient voltage does not reach the protected device, thus providing protection.The MASMCGLCE18A also features a low clamping voltage, low leakage current, and a low IV characteristic. This ensures that the device provides a relatively low voltage drop and that the device does not act as a series voltage regulator.

Conclusion

MASMCGLCE18A is a type of TVS (Transient Voltage Suppressor) diode ideal for applications which require transient voltage protection against power line surges, lightning strikes and other transient voltage events. It is designed for applications which operate between -55 °C and +150 °C and supply voltages up to 15 V for industrial and automotive applications. The device works by using two N-channel MOSFETs connected back-to-back with a parasitic diode for clamping and protecting against voltage transients. It also features a low clamping voltage, low leakage current, and a low IV characteristic.

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