Overview
The SMAJ40CA-TR, produced by STMicroelectronics, is a Transient Voltage Suppressor (TVS) diode designed to protect sensitive electronic equipment from voltage transients and electrostatic discharges. This device is part of the SMAJ series, which is known for its high reliability and stability in high-end circuits. The SMAJ40CA-TR is specifically engineered to handle surges below 600 W (10/1000 μs) and complies with various international standards such as IEC 61000-4-2 and MIL STD 883, method 3015.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Peak Pulse Power Dissipation (10/1000 μs) | 400 | W |
| Peak Pulse Power Dissipation (8/20 μs) | 2.3 kW | W |
| Stand-off Voltage Range | 5 V to 188 V | V |
| Reverse Stand-off Voltage (VR) | 40 V | V |
| Breakdown Voltage (VBR) | 44.4 V | V |
| Maximum Clamping Voltage (VC) | 64.5 V | V |
| Maximum Peak Pulse Current (Ipp) | 6.2 A | A |
| Reverse Leakage Current (IR) | 0.2 µA at 25 °C, 1 µA at 85 °C | µA |
| Operating Junction Temperature Range | -55 °C to 150 °C | °C |
| Directionality | Bidirectional |
Key Features
- High Peak Pulse Power Dissipation: Capable of handling 400 W (10/1000 μs) and 2.3 kW (8/20 μs) peak pulse power.
- Low Leakage Current: Typically 0.2 µA at 25 °C and 1 µA at 85 °C.
- High Junction Temperature: Operating junction temperature up to 150 °C.
- ESD Protection: Compliant with IEC 61000-4-2 for ESD protection up to 30 kV (Air) and 30 kV (Contact).
- EFT Protection: Compliant with IEC 61000-4-4 for electrical fast transient (EFT) protection.
- Fast Response Time: Typically less than 1.0 ps from 0 V to VBR min.
- High Temperature Soldering: Guaranteed to withstand reflow soldering up to 260 °C for 30 seconds).
- RoHS Compliant: Halogen-free and RoHS compliant, with a Pb-free terminal finish).
Applications
The SMAJ40CA-TR is ideal for protecting sensitive electronic equipment in various applications, including:
- Telecom: Protection of I/O interfaces and VCC bus in telecommunications equipment).
- Computer Systems: Protection of vulnerable circuits in computer hardware).
- Industrial Electronics: Protection against voltage transients and ESD in industrial control systems).
- Consumer Electronics: Protection of electronic circuits in consumer devices).
Q & A
- What is the peak pulse power dissipation of the SMAJ40CA-TR?
The SMAJ40CA-TR can handle up to 400 W of peak pulse power dissipation at a 10/1000 μs waveform).
- What are the operating junction temperature limits for the SMAJ40CA-TR?
The operating junction temperature range is from -55 °C to 150 °C).
- Is the SMAJ40CA-TR ESD compliant?
Yes, it complies with IEC 61000-4-2 for ESD protection up to 30 kV (Air) and 30 kV (Contact)).
- What is the reverse leakage current of the SMAJ40CA-TR?
The reverse leakage current is typically 0.2 µA at 25 °C and 1 µA at 85 °C).
- Is the SMAJ40CA-TR RoHS compliant?
Yes, it is halogen-free and RoHS compliant with a Pb-free terminal finish).
- What is the maximum clamping voltage of the SMAJ40CA-TR?
The maximum clamping voltage is 64.5 V).
- What are the typical applications of the SMAJ40CA-TR?
It is used in telecom, computer systems, industrial electronics, and consumer electronics for protecting sensitive circuits).
- What is the directionality of the SMAJ40CA-TR?
The SMAJ40CA-TR is bidirectional).
- Can the SMAJ40CA-TR withstand high temperature soldering?
Yes, it can withstand reflow soldering up to 260 °C for 30 seconds).
- What is the typical thermal resistance junction to ambient of the SMAJ40CA-TR?
The typical thermal resistance junction to ambient is 120 °C/W).
