1 Features

? Undirectional surge protection against 1.7 kV, 42 Ω

IEC 61000-4-5 surge test for industrial signal lines

? Robust surge protection:

– IEC61000-4-5 (8/20 μs): 41 A

? Low clamping voltage of 50 V at 25 A for 8/20 μs

surge current protects downstream components

? 36 V working voltage for protecting signals on 24-V

systems

? Low leakage current of 1 μA

? Low dynamic resistance of 0.5 Ω

? Integrated level 4 IEC 61000-4-2 ESD protection

? 30-kV ESD protection (IEC 61000-4-2)

? SOT-23 (DBZ) small, standard, common footprint

? Leaded package used for automatic optical

inspection (AOI)

2 Applications

? Industrial sensors

? IO link

? PLC I/O modules

? 24-V power lines or digital input or output lines

? 4/20-mA loops

? Appliances

? Medical equipment

? Motor drivers

3 Description

The TSM36A is a part of TI's surge protection device

family. The TSM36A robustly shunts up to 41 A of

IEC 61000-4-5 fault current to protect systems from

high power transients or lightning strikes. The device

offers a solution to the common industrial signal

line EMC requirement to survive up to 1.7 kV IEC

61000-4-5 open circuit voltage coupled through a 42

Ω impedance. The TSM36A clamps during a surge

event, assuring system exposure below 50 V at I PP =

25 A.

Additionally, the TSM36A is available in a small

leaded SOT-23 (DBZ) package which is reduced in

size by approximately 50 percent compared to the

industry standard SMA package. The extremely low

device leakage and capacitance ensures a minimal

effect on the protected line.

For more information on the other devices in the

surge family, see the products at this link.