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Product Attributes

Introduction

The TVS1801 device shunts fault currents up to 30A per IEC 61000-4-5 to protect systems against high-power transients or lightning strikes. The device withstands 1kV IEC 61000-4-5 open-circuit voltage coupled through a 42Ω impedance, meeting common EMC requirements for industrial signal lines. The TVS1801 employs a feedback mechanism to ensure precise, smooth clamping during fault events, keeping the system contact voltage consistently lower than that of conventional TVS diodes. Precise voltage regulation allows designers to confidently select system components with tighter voltage tolerances, reducing system cost and complexity without compromising reliability. The TVS1801 offers a ±18V operating range, enabling operation in systems that require protection against reverse-wiring conditions.

In addition, the TVS1801 is housed in a compact SON package designed for space-constrained applications, offering a significantly reduced footprint compared to standard SMA and SMB packages. Low device leakage current and capacitance ensure minimal impact on the protected line. To verify reliable protection throughout the product's entire service life, the TVS1801 was subjected to 5000 repetitive surge impulse tests at 125°C with no change in device performance.

Features

• Protection against 1kV, 42Ω IEC 61000-4-5 surge testing on industrial signal lines
• Bidirectional polarity protection for bipolar signal transmission or miswiring conditions
• Clamp voltage of 27.4V at 30A 8/20μs surge current
• Standoff voltage: ±18V
• Compact 3mm × 3mm SON package
• Withstands over 5,000 repetitive 30A 8/20μs surge current strikes at 125℃
• Robust surge protection
  • IEC61000-4-5 (8/20μs): 30A
  • IEC61643-321 (10/1000μs): 4.5A
• Low leakage current
  • 0.4nA (typical) at 27℃
  • 280nA maximum at 85℃
• Low capacitance: 65pF
• Integrated Level 4 IEC 61000-4-2 ESD protection

Applications

• Industrial sensor I/O
• PLC I/O modules
• Solid-state drives
• Appliances
• Medical equipment
• 12V power lines