Overview
The SMCJ40A-TR is a Transient Voltage Suppressor (TVS) diode produced by STMicroelectronics. This component is designed to protect sensitive electronic equipment from electrostatic discharges and electrical overstress. It complies with various international standards, including IEC 61000-4-2, MIL STD 883 Method 3015, and IEC 61000-4-4 and 5. The SMCJ40A-TR is particularly suited for high-end equipment and Switch-Mode Power Supplies (SMPS) where low leakage current and high junction temperature are critical for reliability and stability.
Key Specifications
| Parameter | Value |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W |
| Peak Pulse Power (8/20 μs) | Up to 10 kW |
| Stand-off Voltage (VRM) | 40 V |
| Minimum Breakdown Voltage (VBR) | 44.4 V |
| Maximum Breakdown Voltage (VBR) | 49.1 V |
| Maximum Clamping Voltage (VC) | 64.5 V |
| Leakage Current at 25 °C | 0.2 µA |
| Operating Junction Temperature | -55 °C to 150 °C |
| Package Type | DO-214AB (SMC) |
| Directionality | Unidirectional |
Key Features
- Halogen-free and RoHS compliant.
- Low profile package with built-in strain relief.
- Glass passivated junction for high reliability.
- Low inductance and excellent clamping capability.
- Fast response time, typically less than 1 ps from 0 V to VBRmin.
- Low leakage current: 0.2 µA at 25 °C.
- High power capability at Tjmax: up to 1250 W (10/1000 µs).
- Lead finishing: matte tin plating.
Applications
The SMCJ40A-TR is suitable for various applications requiring protection against transient voltages and electrical overstress. These include:
- Switch-Mode Power Supplies (SMPS).
- High-end electronic equipment.
- Surface mount applications to optimize board space.
- Protection in systems exposed to electrostatic discharges and surges.
Q & A
- What is the peak pulse power of the SMCJ40A-TR?
The peak pulse power of the SMCJ40A-TR is 1500 W (10/1000 μs) and up to 10 kW (8/20 μs).
- What is the stand-off voltage of the SMCJ40A-TR?
The stand-off voltage (VRM) of the SMCJ40A-TR is 40 V.
- What is the operating junction temperature range of the SMCJ40A-TR?
The operating junction temperature range is -55 °C to 150 °C.
- Is the SMCJ40A-TR RoHS compliant?
- What type of package does the SMCJ40A-TR use?
The SMCJ40A-TR uses a DO-214AB (SMC) package.
- Is the SMCJ40A-TR unidirectional or bidirectional?
The SMCJ40A-TR is a unidirectional TVS diode.
- What is the leakage current of the SMCJ40A-TR at 25 °C?
The leakage current at 25 °C is 0.2 µA.
- What are the key features of the SMCJ40A-TR's package?
The package features a low profile, built-in strain relief, and is halogen-free and RoHS compliant).
- What are typical applications for the SMCJ40A-TR?
- How fast is the response time of the SMCJ40A-TR?
BRmin).
