CD143A-SR05: High-Performance TVS Diode by Bourns Inc. Ultimate Circuit Protection Solution

In the realm of circuit protection, the CD143A-SR05 stands as a pinnacle of engineering excellence by Bourns Inc.. This transient voltage suppression (TVS) diode delivers unmatched performance in safeguarding sensitive electronics against voltage spikes, ESD, and surge events. Whether you're designing Ethernet infrastructure, industrial controls, or consumer electronics, this component offers robust protection with minimal signal distortion. Below, we dissect its specifications, applications, and competitive advantages to help engineers make informed decisions.

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In-Depth Product Analysis

Manufacturer Credibility

Bourns Inc., a global leader in electronic components, brings decades of expertise to the CD143A-SR05. Renowned for reliability, their TVS diodes are trusted in mission-critical applications worldwide.

Technical Specifications

• Voltage Ratings: 5V reverse standoff, 6V breakdown, and 20V clamping voltage at 30A.
• Current Handling: 30A peak pulse current (8/20 s) and 500W peak power dissipation.
• Low Capacitance: Just 10pF at 1MHz ensures compatibility with high-speed data lines (e.g., USB 3.0, Ethernet).
• Package: Compact SOT-143 (TO-253-4) surface-mount package for space-constrained PCBs.
• Temperature Range: Operates from -55 C to +150 C, suitable for harsh environments.

Applications

Designed for Ethernet ports, power lines, and telecom equipment, the CD143A-SR05 mitigates risks from:

• Lightning-induced surges
• Electrostatic discharge (ESD)
• Inductive load switching

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Competitive Advantages

1. Superior Surge Protection

With a 500W peak pulse power rating, this diode outperforms standard TVS devices in handling high-energy transients.

2. Signal Integrity Preservation

Ultra-low 10pF capacitance minimizes insertion loss, critical for high-frequency applications like 5G and IoT.

3. Space-Efficient Design

The SOT-143 package (3.1mm x 1.7mm) enables high-density PCB layouts without compromising thermal performance.

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Why Engineers Prefer CD143A-SR05

Compared to generic TVS diodes, the CD143A-SR05 offers:

• Higher Reliability: Bourns' stringent quality controls ensure <1% failure rates.
• Faster Response Time: Reacts to transients in picoseconds, clamping voltages before damage occurs.
• Industry Compliance: Meets IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) standards.

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Purchasing & Integration Tips

For optimal performance:

1. Place the diode as close as possible to the protected line's entry point.
2. Use short, wide traces to minimize parasitic inductance.
3. Pair with Bourns' CDSOT23-SM712 for multi-line protection in Ethernet PHYs.

Where to Buy: Available through authorized distributors like Digi-Key, Mouser, and Bourns' e-store. Check stock levels for SOT-143 (CD143A-SR05) variants.

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Conclusion

The CD143A-SR05 redefines circuit protection with its blend of high surge capacity, low capacitance, and compact form factor. For engineers designing next-gen electronics, this Bourns TVS diode is an indispensable asset against an increasingly volatile electrical landscape.

Call to Action: Upgrade your designs today click here to request samples or purchase the CD143A-SR05.