Overview
The SMAJ15A-TR is a transient voltage suppressor (TVS) diode from STMicroelectronics, designed to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. This component is part of the SMAJ series, which is known for its excellent clamping capability and high peak pulse power dissipation.
Key Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Peak Pulse Power Dissipation at TA=25°C by 10/1000µs Waveform | PPPM | 400 | W |
| Power Dissipation on Infinite Heat Sink at TL=50°C | PD | 3.3 | W |
| Peak Forward Surge Current, 8.3ms Single Half Sine Wave | IFSM | 60 | A |
| Maximum Instantaneous Forward Voltage at 25A for Unidirectional Only | VF | 3.5 | V |
| Operating Temperature Range | TJ | -65 to 150 | °C |
| Storage Temperature Range | TSTG | -65 to 175 | °C |
| Typical Thermal Resistance Junction to Lead | RθJL | 30 | °C/W |
| Typical Thermal Resistance Junction to Ambient | RθJA | 120 | °C/W |
| Reverse Stand-off Voltage (VR) | VR | 15.0 | V |
| Breakdown Voltage (VBR) @ IT | VBR | 16.70 - 18.50 | V |
| Maximum Clamping Voltage (VC) @ Ipp | VC | 24.4 | V |
| Maximum Peak Pulse Current (Ipp) | Ipp | 71 | A |
| Maximum Reverse Leakage Current (IR) @ VR | IR | 1 | µA |
Key Features
- 400W Peak Pulse Power capability at 10/1000µs waveform, repetition rate (duty cycle): 0.01%.
- Excellent clamping capability to protect against transient overvoltages.
- Surface mount footprint for compact PCB layout.
- Low profile package.
- Typical failure mode is short from over-specified voltage or current.
- ESD protection of data lines in accordance with IEC 61000-4-2 (30kV Air, 30kV Contact).
- EFT protection of data lines in accordance with IEC 61000-4-4.
- Fast response time: typically less than 1.0ps from 0 Volts to VBR min.
- Glass passivated junction.
- Low inductance.
- High temperature to reflow soldering guaranteed: 260°C/30sec.
- Plastic package is flammability rated V-0 per UL-94.
- Meet MSL level1, per J-STD-020, LF maximum peak of 260°C.
- Matte tin, lead–free plated, halogen free and RoHS compliant).
Applications
The SMAJ15A-TR TVS diode is ideal for the protection of I/O interfaces, VCC bus, and other vulnerable circuits used in various applications, including:
- Telecom equipment).
- Computer systems).
- Industrial electronics).
- Consumer electronics).
Q & A
- What is the peak pulse power dissipation of the SMAJ15A-TR?
The peak pulse power dissipation of the SMAJ15A-TR is 400W at 10/1000µs waveform).
- What is the maximum clamping voltage of the SMAJ15A-TR?
The maximum clamping voltage (VC) of the SMAJ15A-TR is 24.4V at the specified peak pulse current (Ipp)).
- What is the operating temperature range of the SMAJ15A-TR?
The operating temperature range of the SMAJ15A-TR is -65°C to 150°C).
- What is the storage temperature range of the SMAJ15A-TR?
The storage temperature range of the SMAJ15A-TR is -65°C to 175°C).
- Is the SMAJ15A-TR RoHS compliant?
Yes, the SMAJ15A-TR is halogen free and RoHS compliant).
- What is the typical thermal resistance junction to ambient of the SMAJ15A-TR?
The typical thermal resistance junction to ambient (RθJA) of the SMAJ15A-TR is 120°C/W).
- What are the ESD and EFT protection capabilities of the SMAJ15A-TR?
The SMAJ15A-TR provides ESD protection in accordance with IEC 61000-4-2 (30kV Air, 30kV Contact) and EFT protection in accordance with IEC 61000-4-4).
- What is the maximum forward surge current of the SMAJ15A-TR?
The maximum forward surge current (IFSM) of the SMAJ15A-TR is 60A for an 8.3ms single half sine wave).
- What is the reverse stand-off voltage (VR) of the SMAJ15A-TR?
The reverse stand-off voltage (VR) of the SMAJ15A-TR is 15.0V).
- What is the breakdown voltage (VBR) of the SMAJ15A-TR?
The breakdown voltage (VBR) of the SMAJ15A-TR is between 16.70V and 18.50V at the specified test current (IT)).
