Overview
The SMAJ40CA/TR13, produced by YAGEO, is a Transient Voltage Suppressor (TVS) diode designed for surface-mounted applications. This component is part of the SMAJ series and is optimized to protect electronic circuits from voltage transients and spikes. The SMAJ40CA/TR13 is particularly suited for applications requiring high reliability and compact design.
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 (approximately 6.2A for SMAJ40CA) | 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 Standoff Voltage (Typical) | Vrwm | 40V | V |
| Breakdown Voltage (Minimum) | Vbr | 44.4V | V |
| Clamping Voltage (Maximum) @ Ipp | Vc | 64.5V | V |
| Package | - | DO-214AC (SMA) | - |
| Polarity | - | Bidirectional | - |
Key Features
- For surface mounted applications to optimize board space
- Low profile package
- Glass passivated junction
- Low inductance
- Excellent clamping capability
- 400W peak pulse power capability at 10/1000μs waveform
- Fast response time
- Typical IR less than 1μA above 10V
- High Temperature soldering: 260℃/10 seconds at terminals
- Plastic package has Underwriters Laboratory flammability 94V-0
- Meets MSL level 1, per J-STD-020
- Safety certification: UL, IEC61000-4-2 ESD 30KV Air, 30KV contact compliance
Applications
- I/O interface protection
- AC/DC power supply protection
- Low frequency signal transmission lines (e.g., RS232, RS485)
Q & A
- What is the peak pulse power dissipation of the SMAJ40CA/TR13?
The peak pulse power dissipation is a minimum of 400 Watts at a 10/1000μs waveform.
- What is the typical reverse standoff voltage for the SMAJ40CA/TR13?
The typical reverse standoff voltage (Vrwm) is 40V.
- What is the clamping voltage at the peak pulse current for the SMAJ40CA/TR13?
The clamping voltage (Vc) at the peak pulse current is approximately 64.5V.
- What is the operating junction and storage temperature range for the SMAJ40CA/TR13?
The operating junction and storage temperature range is -55 to +150℃.
- What is the package type of the SMAJ40CA/TR13?
The package type is DO-214AC (SMA).
- Is the SMAJ40CA/TR13 bidirectional or unidirectional?
The SMAJ40CA/TR13 is bidirectional.
- What are the typical thermal resistances for the SMAJ40CA/TR13?
The typical thermal resistance junction to lead (RθJL) is 30℃/W, and the typical thermal resistance junction to ambient (RθJA) is 120℃/W.
- What safety certifications does the SMAJ40CA/TR13 meet?
The SMAJ40CA/TR13 meets UL safety certification and IEC61000-4-2 ESD 30KV Air and 30KV contact compliance.
- What is the peak forward surge current for the SMAJ40CA/TR13?
The peak forward surge current (IFSM) is 40 Amps for an 8.3ms single half sine-wave.
- How is the SMAJ40CA/TR13 packaged?
The SMAJ40CA/TR13 is packaged in a 13-inch reel (TR13) with 12mm tape (EIA STD RS-481).
