1 Features

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

Surge Test for Industrial Signal Lines

• Max Clamping Voltage of 24.7 V at 40 A of 8/20

μs Surge Current

• Standoff Voltage: 18 V

• Tiny 4 mm2 Footprint

• Survives Over 5,000 Repetitive Strikes of 35 A

8/20 μs Surge Current at 125°C

• Robust Surge Protection:

– IEC 61000-4-5 (8/20 μs): 40 A

– IEC 61643-321 (10/1000 μs): 6 A

• Low Leakage Current

– 1.2 nA Typical at 27°C

– 9 nA Typical at 85°C

• Low Capacitance: 116 pF

• Integrated Level 4 IEC 61000-4-2 ESD Protection

2 Applications

• Industrial Sensor I/O

• Solid State Drives

• PLC I/O Modules

• Medical Equipment

• 12 V Power Lines

• 15 V Analog Signal Inputs

• Appliances

3 Description

The TVS1800 robustly shunts up to 40 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 kV IEC 61000-

4-5 open circuit voltage coupled through a 42 Ω

impedance. The TVS1800 uses a unique feedback

mechanism to ensure precise flat clamping during a

fault, assuring system exposure below 25 V. The tight

voltage regulation allows designers to confidently

select system components with a lower voltage

tolerance, lowering system costs and complexity

without sacrificing robustness.

In addition, the TVS1800 is available in a small 2 mm

× 2 mm SON footprint which is ideal for space

constrained applications, offering a 70 percent

reduction in size compared to industry standard SMA

and SMB packages. The extremely low device

leakage and capacitance ensure a minimal effect on

the protected line. To ensure robust protection over

the lifetime of the product, TI tests the TVS1800

against 5,000 repetitive surge strikes at high

temperature with no shift in device performance.

The TVS1800 is part of TI's Flat-Clamp family of

surge devices. For more information on the other

devices in the family, see the Device Comparison

Table.