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Product Attributes

Introduction

The TVS1800 can reliably divert IEC 61000-4-5 fault currents of up to 40A to protect the system from high-power transient shocks or lightning strikes. This device provides a solution to meet the common EMC requirements of industrial signal lines and can withstand an IEC 61000-4-5 open-circuit voltage of up to ±1kV when coupled through a 42Ω impedance. The TVS1800 uses a unique feedback mechanism to ensure precise and smooth clamping capability during faults, keeping the system contact voltage below 25V. Precise voltage regulation allows designers to confidently select system components with lower voltage tolerances, reducing system cost and complexity without compromising reliability.

In addition, the TVS1800 comes in a small 2mm×2mm SON package, making it ideal for space-constrained applications. Compared with the industry-standard SMA and SMB packages, its size is reduced by 70%. The extremely low device leakage current and capacitance ensure minimal impact on the protected lines.

To ensure reliable protection throughout the product's lifespan, TI conducted 5,000 repeated surge tests on the TVS1800 in a high-temperature environment without any change in device performance.

Features

• Protection characteristics meet ±1kV, 42Ω IEC 61000-4-5 surge test requirements for industrial signal lines
• Maximum clamping voltage of 24.7V at 40A, 8/20μs surge current
• Off-state voltage: 18V
• Compact 4mm² package footprint
• Withstands over 5,000 repetitive 35A 8/20μs surge current strikes at 125°C
• Robust surge protection:
  • IEC 61000-4-5 (8/20μs): 40A
  • IEC 61643-321 (10/1000μs): 6A
• Low leakage current:
  • 1.2nA (typical) at 27°C
  • 9nA (typical) at 85°C
• Low capacitance: 116pF
• Integrated Level 4 IEC 61000-4-2 ESD protection

Applications

• Industrial sensor I/O
• Solid-state drives
• PLC I/O modules
• Medical devices
• 12V power lines
• 15V analog signal input devices