SMBJ8.5A TVS Diode: High-Performance Circuit Protection for Voltage Spikes
SMBJ8.5A TVS Diode: Ultimate Protection Against Voltage Spikes
The SMBJ8.5A from SMC Diode Solutions is a premium transient voltage suppression (TVS) diode engineered to shield sensitive electronic circuits from damaging voltage transients caused by lightning, electrostatic discharge (ESD), and inductive load switching. This high-performance diode is a must-have for engineers and designers seeking reliable overvoltage protection in a compact, surface-mount package.
In-Depth Technical Specifications
Manufacturer and Product Details
- Manufacturer: SMC Diode Solutions a trusted global leader in semiconductor solutions
- Part Number: SMBJ8.5A
- Product Status: Active and available for immediate shipment
Electrical Performance Characteristics
- Device Type: Zener-based TVS diode with unidirectional operation
- Standoff Voltage: 8.5V (typical) maintains circuit integrity during normal operation
- Breakdown Voltage: Minimum 9.44V precise triggering for protection
- Clamping Voltage: Maximum 14.4V at peak pulse current excellent suppression capability
- Peak Pulse Current: 41.7A (8/20 s waveform) handles severe transient events
- Peak Power Dissipation: 600W robust energy absorption
Physical and Environmental Specifications
- Package Type: DO-214AA (SMB) industry-standard surface-mount package
- Mounting Style: Surface Mount Technology (SMT) compatible
- Operating Temperature Range: -55 C to +150 C (junction temperature) suitable for harsh environments
- RoHS Compliance: Yes environmentally friendly construction
Advanced Protection Features
The SMBJ8.5A incorporates several cutting-edge protection mechanisms:
- Fast Response Time: Reacts to transients in picoseconds, far faster than most competing solutions
- Low Clamping Ratio: Maintains protected circuits well below damaging voltage levels
- High Surge Capacity: Withstands repeated surge events without degradation
- Excellent Thermal Performance: SMB package provides efficient heat dissipation
Comprehensive Application Guide
Primary Applications
- Consumer Electronics: Protection for USB ports, HDMI interfaces, and audio/video inputs
- Industrial Controls: Safeguarding PLCs, sensors, and communication buses
- Automotive Systems: ECU protection against load dump and switching transients
- Telecommunications: Protecting sensitive RF circuits and base station equipment
- Power Supplies: Secondary protection for DC/DC converters and voltage regulators
Design Considerations
When implementing the SMBJ8.5A in your design:
- Place the diode as close as possible to the protected circuit node
- Ensure low-inductance PCB traces for optimal performance
- Consider using multiple diodes in parallel for higher current applications
- Verify system-level ESD protection requirements meet relevant standards
Comparative Advantages
The SMBJ8.5A offers significant benefits over alternative protection devices:
| Feature | SMBJ8.5A | Competitor Devices |
|---|---|---|
| Clamping Voltage | 14.4V max | Typically 15-18V |
| Response Time | Picoseconds | Nanoseconds |
| Package Size | Compact SMB | Often larger SMA |
| Surge Current | 41.7A | Typically 30-35A |
Purchasing and Availability
The SMBJ8.5A is available through authorized distributors worldwide. For volume purchases, SMC Diode Solutions offers:
- Competitive pricing tiers
- Custom reel packaging options
- Technical support for design-in assistance
- Reliable supply chain with short lead times
Frequently Asked Questions
Q: Can the SMBJ8.5A be used for bidirectional protection?
A: No, this is a unidirectional device. For bidirectional protection, consider the SMBJ8.5CA variant.
Q: What is the typical lifespan of this TVS diode?
A: When operated within specifications, the SMBJ8.5A can withstand thousands of surge events without degradation.
Q: Is this diode suitable for automotive applications?
A: Yes, when qualified to the appropriate automotive standards for your specific application.
Conclusion
The SMBJ8.5A TVS diode represents the pinnacle of transient voltage protection technology, combining superior electrical performance with robust physical construction. Its ability to clamp dangerous voltage spikes while maintaining circuit integrity makes it an essential component in modern electronic designs across industries. Whether you're protecting sensitive microcontrollers, communication interfaces, or power supply rails, the SMBJ8.5A delivers reliable, high-performance protection in a compact, cost-effective package.
For design engineers seeking uncompromising circuit protection, the SMBJ8.5A from SMC Diode Solutions stands as the optimal choice, offering peace of mind and enhanced product reliability in the face of unpredictable electrical transients.