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.