Overview
The SMAJ40CA/TR7 is a Transient Voltage Suppressor (TVS) produced by YAGEO, designed for surface-mounted applications to optimize board space. This component is part of the SMAJ series, which offers robust protection against voltage transients and electrostatic discharges. The SMAJ40CA/TR7 is particularly suited for applications requiring high reliability and efficient clamping of voltage spikes.
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 | 40.0 | V |
| Breakdown Voltage @ IT | VBR | 44.40~49.10 | V |
| Maximum Clamping Voltage @ IPP | VC | 64.5 | V |
| Reverse Leakage @ VRWM | IR | 1 | μA |
Key Features
- For surface-mounted applications to optimize board space
- Low profile package (JEDEC DO-214AC)
- 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/TR7?
The peak pulse power dissipation is a minimum of 400 Watts at a 10/1000μs waveform.
- What is the operating junction and storage temperature range for this component?
The operating junction and storage temperature range is -55 to +150 ℃.
- What is the typical thermal resistance junction to ambient for the SMAJ40CA/TR7?
The typical thermal resistance junction to ambient is 120 ℃/W.
- What are the key features of the SMAJ40CA/TR7 package?
The package features a low profile design, glass passivated junction, low inductance, and excellent clamping capability.
- What safety certifications does the SMAJ40CA/TR7 meet?
The component meets UL safety certification and IEC61000-4-2 ESD 30KV Air, 30KV contact compliance.
- What is the reverse stand-off voltage for the SMAJ40CA/TR7?
The reverse stand-off voltage is 40.0 V.
- What is the maximum clamping voltage at peak pulse current for the SMAJ40CA/TR7?
The maximum clamping voltage at peak pulse current is 64.5 V.
- What are the typical soldering conditions for the SMAJ40CA/TR7?
The recommended soldering conditions include a peak temperature of 260℃ for 20-40 seconds and a ramp-up rate of 3℃/second max.
- What is the weight of the SMAJ40CA/TR7 component?
The weight of the component is approximately 0.07g.
- What are the common applications for the SMAJ40CA/TR7?
Common applications include I/O interface protection, AC/DC power supply protection, and low frequency signal transmission lines.
- How is the polarity indicated on the SMAJ40CA/TR7?
The polarity is indicated by a color band that denotes the cathode, except for bi-directional models.
