The SMF40A-E3-08 is a surface-mount Transient Voltage Suppressor (TVS) diode manufactured by Vishay. It's designed to protect sensitive electronic components from voltage transients induced by lightning, inductive load switching, and Electrostatic Discharge (ESD). This device is part of the SMF series, known for its small size and high surge capability.

Applications:

• Protection of I/O Interfaces
• VCC bus protection
• Industrial control systems
• Telecom equipment
• Consumer electronics

Features:

• Unidirectional TVS diode
• Surface mount package
• Low profile package
• Excellent clamping capability
• Glass passivated junction
• High surge capability: 400W peak pulse power capability with a 10/1000 μs waveform
• Fast response time: typically less than 1.0 ps from 0 V to BV min
• Compliant to RoHS directive 2011/65/EU and in accordance to WEEE 2002/96/EC

Benefits:

• Protects sensitive electronics from voltage transients.
• Reduces downtime and maintenance costs associated with transient-related failures.
• Improves the reliability and lifespan of electronic products.
• Simplifies PCB layout due to its small size.
• Meets industry standard compliance requirements (RoHS and WEEE).

Additional Details:

The SMF40A-E3-08 has a standoff voltage of 40V, a breakdown voltage of 44.4V (minimum) to 49.1V (maximum), and a clamping voltage of 64.8V at a peak pulse current of 6.2A. Its operating junction temperature range is -55°C to +150°C. The device comes in an SMF (DO-219AB) package. The polarity is unidirectional, meaning it protects against positive voltage transients only.