MX1.5KE39CAE3 Circuit Protection

Voltage - Clamping (Max) @ Ipp:	53.9V
Supplier Device Package:	CASE-1
Package / Case:	DO-201AA, DO-27, Axial
Mounting Type:	Through Hole
Operating Temperature:	-65°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	1500W (1.5kW)
Current - Peak Pulse (10/1000µs):	28A
Series:	Military, MIL-PRF-19500
Voltage - Breakdown (Min):	37.1V
Voltage - Reverse Standoff (Typ):	33.3V
Bidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

The MX1.5KE39CAE3 is a bidirectional, silicon-based transient voltage suppressor (TVS) diode, exclusively designed for high-speed automotive systems. This small form-factor component is capable of withstanding extremely low surge current and voltages levels, making it ideal for use in automotive, military, and industrial systems. The MX1.5KE39CAE3 is compliant with the automotive Requirement Specification Electronics Standard Release, and meets the Common Mode Working Capacity voltage requirements of the automotive industry.

Application Field

The MX1.5KE39CAE3 is designed for application in automotive systems, such as airbag controllers, powertrains, safety systems, and braking systems. Due to its compact size, the device is suitable for replacing larger, traditional components in many scenarios. This makes the device an attractive choice for designers of automotive systems, who need to save space and money. Moreover, the device is highly reliable and provides rock-solid ESD protection and transient voltage protection.

Working Principle

The MX1.5KE39CAE3 operates in a two-step response profile. Initially, when a transient overvoltage occurs, the TVS diode begins to absorb current, and rapidly lowers the voltage. This is known as the Clamping Voltage, and is the maximum voltage that can be sustained by the diode. Subsequently, the device releases the stored-up energy as heat, due to its leakage current. As a result, the voltage decreases to its nominal level. The MX1.5KE39CAE3 is also configured with the Avalanche Voltage Breakdown. During this process, a high voltage is applied to the device until it breaks down at the avalanche voltage. This voltage is typically two to four times higher than the clamping voltage, and is dependent on the particular design of the device. As the voltage decreases, the device dissipates heat until it reaches the junction breakdown voltage.

Conclusion

In conclusion, the MX1.5KE39CAE3 is an excellent device for automotive systems, due to its extremely low surge current and voltage protection, as well as its compact size. The device operates with a two-step response profile, involving the clamping voltage and the avalanche breakdown voltage. Combined, these aspects make the MX1.5KE39CAE3 an attractive choice for cost-sensitive and space-focused automotive systems.

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