TPSMB15CA

Overview

The TPSMB15CA is a surface-mount transient voltage suppressor (TVS) diode from the TPSMB series, designed to protect sensitive electronic components from voltage transients and electrostatic discharge (ESD). This device features a uni-directional configuration with a 15V breakdown voltage, making it suitable for DC circuit protection. As part of the industry-standard SMA (DO-214AC) package, the TPSMB15CA offers a compact footprint for space-constrained applications while maintaining robust protection capabilities. Its primary function is to clamp transient voltages to safe levels, diverting excess current away from protected components.

Structure and Working Principle

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The TPSMB15CA consists of a silicon avalanche diode structure housed in a surface-mount SMA package. When the voltage across the device exceeds its breakdown voltage (15V), it enters avalanche conduction, effectively clamping the voltage to a safe level. The diode's fast response time (typically in picoseconds) ensures immediate reaction to transient events. Its low clamping voltage characteristic helps maintain protected circuit voltages well below damaging levels. The uni-directional design means it's specifically for DC circuit protection where the polarity is known and constant.

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Key Features

The TPSMB15CA offers several notable features including a peak pulse power dissipation of 600W (10/1000μs waveform), low leakage current (typically <1μA at working voltage), and an operating temperature range of -55°C to +150°C. Its compact SMA package measures just 4.6mm × 2.6mm × 2.1mm, making it suitable for high-density PCB designs. The device meets various industry standards including IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT) protection requirements, ensuring reliable performance in harsh electrical environments.

Application Areas

Common applications for the TPSMB15CA include protection of power supply lines, data/communication interfaces, and I/O ports in various electronic systems. It's particularly useful in automotive electronics (protecting CAN bus, LIN bus), industrial control systems, and telecommunications equipment. The device is also employed in consumer electronics for USB port protection, as well as in medical equipment where reliable transient protection is critical. Its 15V rating makes it suitable for protecting circuits operating at 5V, 12V, and similar low-voltage DC systems.

Maintenance and Precautions

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When using the TPSMB15CA, proper PCB layout is crucial - place the device as close as possible to the protected line's entry point. Ensure adequate trace width to handle surge currents, and consider using multiple devices in parallel for higher power applications. Avoid exposing the device to voltages exceeding its maximum ratings, and observe proper ESD handling procedures during installation. For optimal protection, combine with other protection components (like fuses or resistors) when designing protection circuits for sensitive equipment.

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B2B Procurement Guide

When procuring TPSMB15CA TVS diodes in bulk, verify the manufacturer's certification (common manufacturers include Vishay, STMicroelectronics, and ON Semiconductor). Check for RoHS compliance and request material certificates if required for your industry. Consider ordering samples first to verify performance in your specific application. For volume purchases, negotiate pricing based on quantity breaks - prices typically decrease significantly for orders above 1,000 pieces. Lead times can vary from 4-12 weeks depending on market demand, so plan procurement accordingly.