Overview
The SM4T47CAY is a high-performance, automotive-grade Transient Voltage Suppressor (TVS) produced by STMicroelectronics. This component is designed to protect sensitive automotive circuits against surges and electrostatic discharges, adhering to stringent automotive standards such as ISO 7637-2 and ISO 10605. The SM4T47CAY is part of the SM4TxxAY/CAY series, which features a robust SMA package and utilizes Planar technology to ensure low leakage current and high junction temperature tolerance, making it suitable for high-end automotive applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Peak Pulse Power (10/1000 μs) | 400 | W |
| Peak Pulse Power (8/20 μs) | 2.3 kW | kW |
| Stand-off Voltage Range | 5 V to 70 V | V |
| Leakage Current at 25 °C | 0.2 µA | µA |
| Leakage Current at 85 °C | 1 µA | µA |
| Operating Junction Temperature Range | -55 to +150 °C | °C |
| Maximum Lead Temperature for Soldering | 260 °C | °C |
| ESD Protection (ISO 10605) | 30 kV (air and contact discharge) | kV |
| Surge Capability (ISO 7637-2) | Pulse 1: VS = -150 V, Pulse 2a: VS = +112 V, Pulse 3a: VS = -200 V, Pulse 3b: VS = +150 V | V |
| Package Type | SMA | - |
| Package Weight | 72 mg | mg |
| VBR at 25 °C (Nominal Value) | 40 V | V |
| VCL at 25 °C (Typical) | 64.5 V | V |
| IPP at 25 °C (Typical) | 2.49 A | A |
| Dynamic Resistance (RD) | 6.2 Ω | Ω |
Key Features
- AEC-Q101 Qualified: Meets the stringent requirements for automotive applications.
- High Surge Capability: Can handle peak pulse powers of up to 400 W (10/1000 μs) and 2.3 kW (8/20 μs).
- Low Leakage Current: Ensures minimal current leakage at both 25 °C and 85 °C.
- High Junction Temperature: Operates reliably up to 150 °C.
- ESD Protection: Compliant with ISO 10605, providing protection up to 30 kV for both air and contact discharges.
- Automotive Surge Protection: Compliant with ISO 7637-2, protecting against various surge pulses.
- Planar Technology: Enhances performance in high-end circuits with low leakage current and high junction temperature tolerance.
- SMA Package: Compact SMA footprint in accordance with IPC 7531 standard.
- ECOPACK Compliance: Available in environmentally friendly packages.
Applications
- Automotive Electronics: Protects sensitive circuits in automotive systems against electrical surges and ESD.
- High-Reliability Systems: Suitable for applications requiring long-term reliability and stability.
- Industrial Control Systems: Can be used in industrial environments where high surge protection is necessary.
- Consumer Electronics: Provides robust protection in consumer electronic devices exposed to potential surges.
Q & A
- What is the peak pulse power rating of the SM4T47CAY?
The SM4T47CAY has a peak pulse power rating of 400 W (10/1000 μs) and 2.3 kW (8/20 μs).
- What are the operating junction temperature limits for the SM4T47CAY?
The operating junction temperature range is -55 to +150 °C.
- Is the SM4T47CAY compliant with automotive surge standards?
Yes, it is compliant with ISO 7637-2 for automotive surge protection.
- What is the leakage current at 25 °C for the SM4T47CAY?
The leakage current at 25 °C is 0.2 µA.
- What package type does the SM4T47CAY use?
The SM4T47CAY is packaged in an SMA footprint.
- Is the SM4T47CAY AEC-Q101 qualified?
Yes, the SM4T47CAY is AEC-Q101 qualified, making it suitable for automotive applications.
- What is the ESD protection level of the SM4T47CAY?
The SM4T47CAY provides ESD protection up to 30 kV for both air and contact discharges according to ISO 10605.
- What is the dynamic resistance (RD) of the SM4T47CAY?
The dynamic resistance (RD) is 6.2 Ω.
- Can the SM4T47CAY be used in high-reliability systems?
Yes, it is suitable for high-reliability systems due to its low leakage current and high junction temperature tolerance.
- Is the SM4T47CAY available in environmentally friendly packages?
Yes, it is available in ECOPACK compliant packages.
