1SMC15AT3 – MOTOROLA

Overview

The onsemi 1SMC15AT3 is a robust unidirectional Transient Voltage Suppressor (TVS) diode designed for critical ESD protection. Its primary function is to safeguard sensitive semiconductor components from damaging voltage transients, with a key operational characteristic being its rapid response time to clamp overvoltage events. A crucial design consideration when implementing this device is the trade-off between its 15V working voltage and the potential for nuisance tripping in systems with marginal voltage margins, necessitating careful circuit analysis to ensure optimal protection without compromising normal operation. This diode offers substantial peak pulse power dissipation, making it suitable for demanding industrial and automotive applications.

Key Features

• Working Voltage: 15 V
• Clamping Voltage: 24.4 V @ 100A
• Peak Pulse Power Dissipation (Pppm): 1.5 kW
• Breakdown Voltage: 16.7 V
• Operating Temperature Range: -65°C to +150°C
• Package: DO-214AB-2 (SMD/SMT)

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• Protection of high-speed data interfaces (e.g., USB, Ethernet)
• Transient suppression in automotive electronic control units (ECUs)
• ESD mitigation for industrial automation equipment
• Overvoltage clamping in power supply input stages