Overview
The 1SMA2C68 is a surface-mount transient voltage suppression (TVS) diode designed to protect sensitive electronic components from voltage spikes and transients. These diodes are commonly used in power supplies, communication equipment, and automotive electronics where voltage surges can occur. The 1SMA2C68 belongs to the SMA package family, making it suitable for automated PCB assembly processes. Its compact size and robust protection capabilities make it a popular choice for modern electronic designs where space is at a premium but protection is critical.
Structure and Working Principle
The 1SMA2C68 consists of a silicon PN junction designed to conduct current when the voltage exceeds its breakdown threshold. Under normal operating conditions, the diode presents high impedance, but when a voltage spike occurs, it rapidly switches to a low-impedance state to shunt the excess energy. The device's avalanche breakdown mechanism allows it to respond to transients in picoseconds, far faster than most other protection components. This swift response time is crucial for protecting modern semiconductor devices that can be damaged by very brief overvoltage events.
Key Features
With a standoff voltage of 5.8V and breakdown voltage between 6.45V and 7.14V, the 1SMA2C68 offers precise protection for low-voltage circuits. Its peak pulse power dissipation of 400W (for 8/20μs waveform) provides substantial protection capability relative to its small size. The diode exhibits extremely low leakage current (typically 1μA at working voltage) and maintains stable performance across a wide temperature range (-55°C to +150°C). These characteristics make it suitable for demanding applications where reliability is paramount.
Application Areas
Primary applications include USB port protection, HDMI interface protection, and safeguarding sensitive ICs in consumer electronics. The 1SMA2C68 is also widely used in automotive electronics for protecting CAN bus systems and infotainment components. In industrial settings, these diodes protect PLC inputs/outputs and sensor interfaces. Their fast response makes them particularly valuable for protecting high-speed data lines in networking equipment and telecommunications infrastructure.
Maintenance and Precautions
While TVS diodes are generally maintenance-free, proper installation is crucial. The 1SMA2C68 should be placed as close as possible to the protected circuit node with minimal lead length to ensure optimal performance. Designers should avoid exceeding the diode's maximum ratings and consider the cumulative effect of multiple transient events. Thermal management is rarely an issue for these components under normal use, but high-repetition applications may require additional heat dissipation considerations.
B2B Procurement Guide
When procuring 1SMA2C68 diodes in bulk, verify the manufacturer's certification and request samples for testing. Reputable brands include Vishay, Littelfuse, and ON Semiconductor. Consider purchasing from authorized distributors to avoid counterfeit components. Minimum order quantities typically range from 1,000 to 10,000 pieces, with price breaks at higher volumes. Lead times vary but generally range from 2-8 weeks for standard orders. Some suppliers offer tape-and-reel packaging suitable for automated assembly lines.
Related Manufacturers
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