1SMA5928BT3 Zener Diode: High-Performance Voltage Regulator by onsemi
1SMA5928BT3 Zener Diode: High-Performance Voltage Regulation by onsemi
The 1SMA5928BT3 is a precision-engineered Zener diode from onsemi, a global leader in semiconductor solutions. Designed for engineers and hobbyists seeking reliable voltage regulation, this 13V Zener diode delivers exceptional stability and efficiency in a compact SMA package. Below, we explore its technical specifications, applications, and why it remains a top choice despite its obsolete status.
Detailed Product Specifications
Voltage and Tolerance
- Zener Voltage (Vz): 13V 5%
- Test Current (Izt): 49mA
This tight tolerance ensures consistent performance in precision circuits like voltage references and analog signal conditioning.
Power and Thermal Performance
- Power Dissipation (Pd): 1.5W
- Thermal Resistance (R JA): 75 C/W
The 1.5W rating makes it suitable for medium-power applications, while its thermal design minimizes overheating risks.
Electrical Characteristics
- Dynamic Impedance (Zzt): 7 (typical)
- Reverse Leakage Current (Ir): 500nA @ 9.9V
- Forward Voltage (Vf): 1.5V @ 200mA
Low leakage and impedance enhance efficiency, reducing energy waste in voltage-clamping scenarios.
Advanced Features
Robust Construction
The DO-214AC (SMA) package offers:
- Surface-mount compatibility for automated PCB assembly
- Superior thermal conductivity for heat dissipation
- Compact dimensions (4.3mm x 2.6mm) for space-constrained designs
Environmental Resilience
- Operating Temperature Range: -65 C to +150 C
- RoHS-compliant construction
Ideal for automotive, industrial, and outdoor electronics exposed to extreme conditions.
Applications
Primary Use Cases
- Voltage Regulation: Maintains stable 13V output in DC power supplies
- Overvoltage Protection: Safeguards sensitive ICs in telecom and computing systems
- Signal Clamping: Limits voltage spikes in data communication lines
- Voltage Reference: Provides accurate bias points for analog circuits
Industry-Specific Implementations
- Automotive: ECU power management
- Industrial: PLC I/O protection
- Consumer Electronics: Smartphone charging circuits
Technical Comparisons
Against Competing Zener Diodes
| Parameter | 1SMA5928BT3 | Competitor A |
|---|---|---|
| Voltage Tolerance | 5% | 10% |
| Power Rating | 1.5W | 1W |
| Package Size | SMA | SMB (larger) |
Design Considerations
Circuit Implementation Tips
- Always include current-limiting resistors to maintain Izt near 49mA
- For parallel configurations, account for thermal derating above 25 C ambient
- Use PCB thermal relief patterns to enhance heat dissipation
Failure Mode Analysis
Common issues and solutions:
- Overcurrent Damage: Implement fuse protection
- Thermal Runaway: Ensure adequate airflow or heatsinking
Purchasing Information
Why Choose Our Stock?
- Batch Testing Reports: Available upon request
- Bulk Discounts: For orders >100 units
- Same-Day Shipping: On orders placed before 3PM EST
Alternative Options
For projects requiring different specifications, consider:
- Higher Voltage: 1SMA5930BT3 (15V)
- Tighter Tolerance: BZX84C13 (2%)
Conclusion
The 1SMA5928BT3 remains a benchmark for reliable voltage regulation, combining onsemi's quality with versatile performance. Its 13V clamping capability, robust SMA package, and wide temperature range make it indispensable for both prototyping and production. While officially obsolete, its proven design continues to support legacy systems and new developments alike.
Call to Action: Search for "1SMA5928BT3 in stock" to find our competitively priced inventory. For datasheets and design support, contact our technical team today!