18-V bidirectional flat-clamp surge protection device

The TVS1801 device shunts up to 30 A

of IEC 61000-4-5 fault current to protect systems from high-power transients or

lightning strikes. The device survives the common industrial signal line EMC

requirement of 1-kV IEC 61000-4-5 open circuit voltage coupled through a 42-Ω

impedance. The TVS1801 uses a feedback mechanism to ensure precise flat clamping

during a fault, keeping system exposure lower than traditional TVS diodes. The tight

voltage regulation allows designers to confidently select system components with a

lower voltage tolerance, lowering system costs and complexity without sacrificing

robustness. The TVS1801 has a ±18-V operating range to enable operation in systems

that require protection against reverse wiring conditions.

In addition, the TVS1801 is available

in a small SON footprint designed for space constrained applications, offering a

significant size reduction compared to standard SMA and SMB packages. 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 TVS1801 against

5000 repetitive surge strikes at 125°C with no shift in device performance.

The TVS1801 is part of TI’s Flat-Clamp

family of surge devices. For a deeper look at the Flat-Clamp family, refer to the

Flat-Clamp Surge Protection Technology for Efficient System

Protection

white paper.