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SM4T27A from ST,ST Microelectronics

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SM4T27A

Manufacturer: ST

TRANSIL

Partnumber Manufacturer Quantity Availability
SM4T27A ST 10 In Stock

Description and Introduction

TRANSIL The SM4T27A is a Transil™ diode manufactured by STMicroelectronics, designed for surge protection in sensitive electronic equipment.  

### **Specifications:**  
- **Type:** Uni-directional Transil™ (TVS diode)  
- **Breakdown Voltage (VBR):** 28.9V (min) to 32V (max) at 1mA  
- **Peak Pulse Power (PPP):** 400W (8/20µs pulse)  
- **Clamping Voltage (VC):** 43.6V (max) at 1A  
- **Standoff Voltage (VRWM):** 27V  
- **Leakage Current (IR):** 1µA (max) at VRWM  
- **Operating Temperature Range:** -55°C to +150°C  
- **Package:** DO-214AC (SMA)  

### **Descriptions and Features:**  
- Provides protection against overvoltage transients (ESD, lightning, inductive switching).  
- Low clamping voltage for effective circuit protection.  
- Fast response time (picoseconds range).  
- RoHS-compliant and halogen-free.  
- Suitable for applications like telecom, industrial, and automotive systems.  

For detailed datasheet information, refer to STMicroelectronics' official documentation.

Application Scenarios & Design Considerations

TRANSIL

Alternative Part Number

  • SMAJ27A --: Same SMA package unidirectional TVS diode with 27V standoff and similar clamping, widely available drop-in replacement.
  • P4SMA27A --: SMA-packaged 400W unidirectional TVS with 27V standoff, close electrical match to the SM4T27A.
  • SMBJ27A --: SMB package 600W unidirectional TVS at 27V standoff; higher surge rating and slightly larger footprint but electrically compatible.

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