p4sma24ca-e3/61

Overview

The P4SMA24CA-E3/61 is a surface-mount TVS diode belonging to the SMA/DO-214AC package family. It's designed to provide robust protection against transient voltage spikes in electronic circuits. As part of Littelfuse's P4SMA series, this component offers reliable performance for a wide range of applications. TVS diodes like the P4SMA24CA-E3/61 are essential for protecting sensitive electronics from damage caused by electrostatic discharge (ESD), lightning-induced surges, and other transient voltage events. The device responds to overvoltage conditions within nanoseconds, diverting excess current away from protected components.

Structure and Working Principle

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The P4SMA24CA-E3/61 features a silicon avalanche diode structure housed in a compact surface-mount package. When the voltage across the diode exceeds its breakdown voltage (24V in this case), it begins to conduct heavily, effectively clamping the voltage to a safe level. The device operates bidirectionally, providing protection against both positive and negative voltage transients. This makes it suitable for AC circuits or applications where polarity might reverse. The diode's fast response time (typically less than 1 picosecond) ensures immediate protection when voltage spikes occur.

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Key Features

This TVS diode offers several important characteristics: a 24V working voltage, low clamping voltage, and high surge current capability (up to 43.6A for an 8/20μs pulse). The surface-mount design (SMA package) makes it suitable for automated PCB assembly processes. Additional features include excellent ESD protection (meets IEC 61000-4-2 Level 4 standards), low leakage current, and high reliability. The device's compact size (4.45mm × 2.40mm) allows for space-efficient PCB layouts while still providing robust protection.

Application Areas

The P4SMA24CA-E3/61 finds use in numerous electronic systems requiring transient voltage protection. Common applications include power supply inputs, data lines, communication ports, and industrial control systems. It's particularly valuable in automotive electronics where ISO 7637-2 compliance is often required. Other typical applications include consumer electronics (USB ports, HDMI interfaces), telecommunications equipment, and medical devices. The component's versatility makes it suitable for both low-voltage digital circuits and higher-voltage industrial applications.

Maintenance and Precautions

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While TVS diodes are generally maintenance-free, proper installation is crucial for optimal performance. Ensure correct polarity orientation during PCB assembly, and follow recommended soldering profiles to prevent thermal damage to the component. PCB layout considerations include keeping trace lengths short between the protected circuit and the TVS diode, and providing adequate thermal relief. After electrical overstress events, it's advisable to check the diode's functionality as repeated surges may degrade its performance over time.

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B2B Procurement Guide

When sourcing the P4SMA24CA-E3/61, verify the manufacturer's authenticity to avoid counterfeit components. Consider purchasing from authorized distributors of Littelfuse or other reputable suppliers. Volume pricing typically becomes competitive at order quantities above 1,000 pieces. Lead times can vary depending on market demand, so plan procurement accordingly for production schedules. Some suppliers offer reel packaging options (typically 3,000 pieces per reel) which is ideal for automated assembly lines. Always check for the latest RoHS compliance documentation.