7. Transient Voltage Suppressor (TVS)

Surface Mount Devices

Part Number

Package

(Stand-Off / Breakdown)
Voltage Range

Power Dissipation

SMF Series

SOD123FL

5.0V~170V (Stand-Off)

200W

SMAJ Series

SMA (DO-214AC)

5.0V~440V (Stand-Off)

400W

P4SMA Series

SMA (DO-214AC)

6.8V~200V (Breakdown)

400W

SMA6J Series

SMA (DO-214AC)

5.0V~188V (Stand-Off)

600W

SMBJ Series

SMB (DO-214AA)

5.0V~440V (Stand-Off)

600W

P6SMB Series

SMB (DO-214AA)

6.8V~540V (Breakdown)

600W

SMB10J Series

SMB (DO-214AA)

5.0V~40V (Stand-Off)

1000W

1.5SMC Series

SMB (DO-214AA)

6.8V~91V (Breakdown)

1500W

SMCJ Series

SMC (DO-214AB)

5.0V~440V (Stand-Off)

1500W

SMDJ Series

SMC (DO-214AB)

5.0V~440V (Stand-Off)

3000W

5.0SMDJ Series

SMC (DO-214AB)

11V~440V (Stand-Off)

5000W

Lead Devices

Part Number

Package

Breakdown Voltage Range

Power Dissipation

P4KE Series

DO-41

6.8V~440V

400W

P6KE Series

DO-15

6.8V~440V

600W

1.5KE Series

DO-201AE

6.8V~440V

1500W

5KP Series

R-6

5.0V~110V

5000W

Introduction of TVS:

Silicon transient voltage suppressors (TVSs) are clamping devices that limit voltage spikes by low impedance avalanche breakdown of a rugged silicon pn junction. They are used to protect sensitive components from electrical overstress such as that caused by induced lightning, inductive load switching and electrostatic discharge.

Lightning, inductive load switching, and electrostatic discharge (ESD) are the most common sources of electrical overstress which produce transient voltages. Transients are narrow spikes of voltage ranging from less than 100 nanoseconds in duration for ESD, to greater than a thousand microseconds for lightning and load switching transients. Transient voltage magnitudes range from tens of volts up to more than 10kV.

When a transient appears the TVS becomes active, clamping it to a harmless level. Its electrical parameters such as breakdown voltage (V(BR)), leakage current (ID), and capacitance should be “invisible” to the circuit and have no effect on performance.