In an era where electronic systems face increasing threats from voltage surges and electrostatic discharge (ESD), the SM15T36CA-E3/9AT TVS diode from Vishay General Semiconductor emerges as a critical solution. This high-performance unidirectional diode offers a robust 49.9V clamping voltage and 30A peak pulse current, making it ideal for automotive, industrial, and telecom applications. With the growing demand for reliable circuit protection in compact designs, the SM15T36CA-E3/9AT combines power efficiency with Vishay’s trusted TransZorb technology. Read on to discover its key parameters, selection guidelines, and why it stands out in the market.
Product Overview
The SM15T36CA-E3/9AT is a surface-mount TVS diode in a DO-214AB (SMC) package, designed to protect sensitive electronics from transient voltage spikes. Key features include:
Clamping Voltage: 49.9V (64.3V max)
Peak Pulse Current (IPP): 30A (156A max)
Breakdown Voltage: 34.2V
Power Dissipation: 1.5kW (6.5W continuous)
Operating Temperature: -65°C to +150°C
Compliant with RoHS and REACH standards, this diode is part of Vishay’s SM15T series, renowned for reliability in harsh environments.
Core Parameters
| Parameter | Value | Source |
|---|---|---|
| Working Voltage (VWM) | 30.8V | Vishay Datasheet (SM15T Series) |
| Clamping Voltage (VC) | 64.3V max | |
| Peak Pulse Current (IPP) | 156A (8/20μs) | |
| Package | DO-214AB (SMC) | |
| Polarity | Unidirectional | |
| ESD Protection | IEC 61000-4-2 (Contact/Air Gap: N/A) |
Selection Guide
Follow these steps to determine if the SM15T36CA-E3/9AT fits your design:
Voltage Requirements: Ensure the working voltage (30.8V) exceeds your circuit’s normal operating voltage.
Transient Threat Level: Match the diode’s 1.5kW peak power to expected surge conditions.
Layout Constraints: The SMC package (DO-214AB) suits space-constrained PCBs.
Environmental Factors: Verify the -65°C to +150°C range aligns with your application.
Tip: For bidirectional protection, consider the SM15T36CA-E3 variant.
Application Cases
Automotive: Protects CAN bus lines from load-dump surges.
Industrial PLCs: Shields I/O ports in factory automation.
Telecom: Safeguards 5G base station power supplies.
Example: In solar inverters, the diode clamps voltage spikes from inductive loads, complying with IEC 61000-4-5 standards.
Market Analysis
According to MarketsandMarkets, the global TVS diode market is projected to grow at 6.2% CAGR (2023–2028), driven by:
Expanding EV infrastructure requiring robust circuit protection.
Rising adoption of IoT devices vulnerable to ESD.
The SM15T36CA-E3/9AT addresses these trends with its high-power handling and miniaturized footprint.
Future Trends
Emerging demands include:
Higher Integration: Multi-channel TVS arrays for compact designs.
Lower Clamping Voltages: To protect advanced CMOS nodes.
Vishay’s roadmap suggests continued innovation in the SM15T series to meet these needs.
Comparison with Similar Models
| Model | Clamping Voltage | Peak Current | Package | Best For |
|---|---|---|---|---|
| SM15T36CA-E3/9AT | 49.9V | 30A | DO-214AB | High-power industrial |
| P6KE36CA | 58.1V | 22.3A | DO-204AC | Cost-sensitive designs |
| 1.5KE36CA | 46.6V | 43.5A | DO-201 | Automotive |
Why choose SM15T36CA-E3/9AT? Superior power density (1.5kW) in an SMD package.
Frequently Asked Questions
Q1: Is the SM15T36CA-E3/9AT RoHS compliant?
Yes, it meets RoHS and REACH standards.
Q2: Can it protect against lightning surges?
Yes, for indirect strikes (IEC 61000-4-5 Level 3).
Q3: What’s the difference between unidirectional and bidirectional?
Unidirectional protects against positive surges; bidirectional handles both polarities.
Q4: How do I calculate power dissipation?
Use P = VC × IPP. Ensure it stays below 1.5kW.
Q5: Where can I buy bulk quantities?
Contact [email protected] for factory-pack (3,500 units).
Conclusion
The SM15T36CA-E3/9AT TVS diode delivers unmatched transient protection for demanding applications. With Vishay’s proven TransZorb technology and a compact SMC package, it’s a future-proof choice for engineers prioritizing reliability. For pricing or technical support, reach out to our team at [email protected].
