Overview
The SD15C is a classic 15V bidirectional TVS diode widely used in applications such as mobile phones, portable devices, and computer peripherals to provide ESD and transient overvoltage protection for sensitive electronic components. Thanks to its compact SOD-323 package, low leakage current, and robust ESD protection capabilities, the SD15C has become a standard protection component in many designs.
Semiware’s SE3D35B15A utilizes the same SOD-323 package and closely matches the SD15C in key electrical parameters, making it a reliable alternative to the SD15C.
I. SE3D35B15A Key Features
The SE3D35B15A is a single-channel, bidirectional ESD protection device. It employs a proven TVS avalanche structure to provide rapid response to transient voltage surges, effectively protecting downstream ICs and sensitive electronic components.
Key Features:
- 350W Peak Pulse Power (tp=8/20μs)
- Low Clamping Voltage
- Low Leakage Current
- Bidirectional Protection
- Compact SOD-323 Package
- Fast Response Time (nanosecond range)
- RoHS Compliant
II. SE3D35B15A vs SD15C Key Parameters Comparison
| Parameter | Semiware SE3D35B15A | Diodes SD15C | Semtech SD15C |
| Device Type | Bidirectional TVS Diode | Bidirectional TVS Diode | Bidirectional TVS Diode |
| Package | SOD-323 | SOD-323 | SOD-323 |
| Reverse Stand-off Voltage (VRWM) | 15V | 15V | 15V |
| Breakdown Voltage (VBR) Min | 16.7V | 16.7V | 16.7V |
| Peak Pulse Power (PPP) | 350W | 320W | 350W |
| Peak Pulse Current (IPP) | 10A | 12A | 12A |
| Clamping Voltage (VC) | 38V @10A max | 27V @12A max | 29V @12A max |
| Reverse Leakage Current (IR) Max | 0.2μA | 1μA | 1μA |
| Junction Capacitance (CJ) | 45pF typ | 44pF typ | 75pF max |
III. Can the SE3D35A Replace the SD15C?
The parameter comparison above demonstrates a high level of compatibility between the SE3D35B15A and the SD15C.
- Package Compatibility
Both utilize the standard SOD-323 package; replacement can be achieved with minimal or no changes to the PCB layout.
- Comparable Surge Protection Capability
350W peak pulse power; 10A peak pulse current capability.
Capable of meeting ESD and transient surge protection requirements for major applications.
- Lower Leakage Current for Reduced Power Loss
The SE3D35B15A features a maximum leakage current of only 0.2μA, helping to reduce standby power consumption and improve long-term system reliability.
IV. SE3D35B15A (SD15C) Recommended Applications
- Smartphones & Portable Electronics
- Smart Home Devices
- Industrial Controllers
- Sensors
- Set-top Boxes
- Consumer Electronics
Conclusion
For engineers evaluating alternatives to the SD15C, the Semiware SE3D35B15A offers a reliable second-source option that helps mitigate supply chain risks while maintaining design consistency.
Semiware provides flexible procurement solutions and professional technical support, helping customers enhance product reliability, shorten development cycles, and achieve more efficient product lifecycle management.
Looking for a reliable TVS diode alternative for your existing design?
Contact Semiware to discuss your requirements and obtain samples for evaluation and technical support.
