Overview
The SMAJ28CA/TR13 is a transient voltage suppressor (TVS) diode produced by YAGEO, designed to protect electronic circuits from voltage spikes and electrical stress. This component is part of the SMAJ series, which is known for its high-performance and reliability in surface-mounted applications. The SMAJ28CA/TR13 is particularly suited for optimizing board space due to its low profile package and glass passivated junction.
Key Specifications
| Rating | Symbol | Value | Units |
|---|---|---|---|
| Peak pulse power dissipation at 10/1000μs waveform | PPPM | Minimum 400 | Watts |
| Peak pulse current at 10/1000μs waveform | IPPM | See Table | Amps |
| Steady state power dissipation at TA=50℃ | PM(AV) | 3.3 | Watts |
| Peak forward surge current, 8.3ms single half sine-wave | IFSM | 40 | Amps |
| Operating junction and Storage Temperature Range | TJ, TSTG | -55 to +150 | ℃ |
| Typical thermal resistance junction to lead | RθJL | 30 | ℃/W |
| Typical thermal resistance junction to ambient | RθJA | 120 | ℃/W |
| Reverse Stand-Off Voltage | VRWM | 28.0 | V |
| Breakdown Voltage @IT | VBR | 31.10~34.40 | V |
| Maximum Clamping Voltage @IPP | VC | 45.4 | V |
| Peak Pulse Current @IPP | IPP | 8.8 | A |
| Reverse Leakage @VRWM | IR | 1 | μA |
Key Features
- Low Profile Package: Optimized for surface-mounted applications to minimize board space.
- Glass Passivated Junction: Enhances the component's reliability and performance.
- Low Inductance: Reduces electromagnetic interference and improves signal integrity.
- Polarity Indication: Color band denotes the cathode, except for bi-directional models.
- Standard Packaging: Available in 12mm tape (EIA STD RS-481) with a weight of 0.07g.
- High Peak Pulse Power Dissipation: Minimum 400 Watts at 10/1000μs waveform.
- Wide Operating Temperature Range: -55 to +150℃ for junction and storage.
Applications
- I/O Interface Protection: Suitable for protecting input/output interfaces from voltage spikes.
- AC/DC Power Supply Protection: Effective in safeguarding AC/DC power supplies from transient voltages.
- Low Frequency Signal Transmission Lines: Ideal for protecting RS232, RS485, and other low frequency signal transmission lines.
Q & A
- What is the peak pulse power dissipation of the SMAJ28CA/TR13?
The peak pulse power dissipation is a minimum of 400 Watts at a 10/1000μs waveform.
- What is the reverse stand-off voltage for the SMAJ28CA/TR13?
The reverse stand-off voltage (VRWM) is 28.0 volts.
- What is the breakdown voltage range for the SMAJ28CA/TR13?
The breakdown voltage range is 31.10 to 34.40 volts at a test current of 1 mA.
- What is the maximum clamping voltage for the SMAJ28CA/TR13?
The maximum clamping voltage is 45.4 volts at peak pulse current.
- What is the operating temperature range for the SMAJ28CA/TR13?
The operating junction and storage temperature range is -55 to +150℃.
- What is the typical thermal resistance junction to ambient for the SMAJ28CA/TR13?
The typical thermal resistance junction to ambient is 120 ℃/W.
- How is the polarity indicated on the SMAJ28CA/TR13?
The polarity is indicated by a color band that denotes the cathode, except for bi-directional models.
- What are the recommended soldering conditions for the SMAJ28CA/TR13?
The recommended soldering conditions include a peak temperature of 260℃, with specific ramp-up and ramp-down rates, and preheat temperatures between 150℃ and 200℃.
- What are the common applications of the SMAJ28CA/TR13?
The SMAJ28CA/TR13 is commonly used for protecting I/O interfaces, AC/DC power supplies, and low frequency signal transmission lines such as RS232 and RS485.
- What is the packaging option for the SMAJ28CA/TR13?
The component is available in 7-inch and 13-inch reel packages, denoted by the suffixes /TR7 and /TR13, respectively.
- What is the weight of the SMAJ28CA/TR13?
The weight of the SMAJ28CA/TR13 is approximately 0.07 grams.
