SM8S33A-E3/2D

Current - Peak Pulse (10/1000µs):	124A
Base Part Number:	SM8S
Supplier Device Package:	DO-218AB
Package / Case:	DO-218AB
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 175°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	6600W (6.6kW)
Series:	PAR®
Voltage - Clamping (Max) @ Ipp:	53.3V
Voltage - Breakdown (Min):	36.7V
Voltage - Reverse Standoff (Typ):	33V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

The SM8S33A-E3/2D is a high-performance transient voltage suppression (TVS) diode designed for two-line protection of high-voltage transceiver and data lines from overvoltages caused by electrical overstress (EOS). It has a low capacitance clamp and low on-state resistance. This document describes the application field and working principle of this TVS diode.

Application Field

The SM8S33A-E3/2D is designed for two-line protection of high-voltage transceiver and data lines. It can protect power, control, and signal lines from voltage transients caused by electrostatic discharge (ESD), as well as from induced electrical fast transients (EFT, class B). It can also protect lines from overvoltage transients caused by inductive switching, such as motor starting or relay coil switching. The device is suitable for use in automotive systems, bridges, HID lighting, appliances, and industrial electronics.

Working Principle

The SM8S33A-E3/2D is designed to protect two-line systems from transient voltage stresses. The device consists of an anode line, connected to one of the lines to be protected, and a cathode line, connected to a ground potential. When an overvoltage transient is applied to the anode line, the TVS diode will conduct current and clamp the line’s voltage to a safe level. The device can handle fast transients with a peak current up to 8 A.In addition, the device has a low capacitance and low on-state resistance. This means it has a low forward voltage drop, which helps keep power losses to a minimum. The device is rated for operating temperatures from -55°C to +125°C, making it suitable for harsh industrial and automotive environments.

Conclusion

The SM8S33A-E3/2D is a high-performance TVS diode, designed for two-line protection of high-voltage transceiver and data lines. It has a low capacitance clamp and low on-state resistance, which helps keep power losses to a minimum. It can handle fast transients up to 8 A and is rated for temperatures from -55°C to +125°C, making it suitable for automotive and industrial applications.

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