1 Features

• Protection against 1 kV, 42 Ω IEC 61000-4-5

surges for automotive signal lines

• Robust surge protection:

– IEC 61000-4-5 (8/20 μs): 30 A

• Low clamping voltage of 40 V at 24 A for 8/20 μs

surge current protects downstream components

• Bidirectional polarity to support positive and

negative voltage swings and miswiring conditions

• ± 24 V working voltage for protecting signals on

12-V systems

• Low I/O Capacitance: 12 pF (typical)

• Low leakage current of 75 nA (max)

• Integrated IEC 61000-4-2 ESD protection

– ±30-kV contact discharge

– ±30-kV air-gap discharge

• Small SOT-23 leaded package to minimize board

space and allow for automatic optical inspection

(AOI)

2 Applications

• Automotive hybrid, electric, and power train

systems

• HEV/EV on-board charger

• EV battery charging communication

– CHAdeMO

– CCS

– GB/T

• Automotive in-vehicle networks

– Controller area network (CAN)

– Local interconnect network (LIN)

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

3 Description

The TSM24CA-Q1 is a low-capacitance TVS diode

and is part of TI's surge protection device family.

The TSM24CA-Q1 robustly shunts up to 30 A of IEC

61000-4-5 (8/20 μs) 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 kV

IEC 61000-4-5 open circuit voltage coupled through

a 42 Ω impedance, clamping that surge at 40 V

(I PP = 24 A). The TSM24CA-Q1 also has a very

low line capacitance of 12 pF which allows it to

protect common automotive communication networks

like CAN from surges in EV charging applications.

Additionally, the TSM24CA-Q1 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 provide a minimal

effect on the protected line.