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SMCJ45A from FAIRCHILD,Fairchild Semiconductor

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SMCJ45A

Manufacturer: FAIRCHILD, CONCORD, Littelfu.., MICROSEMI

TECHNICAL SPECIFICATIONS OF SURFACE MOUNT TRANSIENT VOLTAGE SUPPRESSOR

Partnumber Manufacturer Quantity Availability
SMCJ45A FAIRCHILD, CONCORD, Littelfu.., MICROSEMI 209000 In Stock

Description and Introduction

TECHNICAL SPECIFICATIONS OF SURFACE MOUNT TRANSIENT VOLTAGE SUPPRESSOR The **SMCJ45A** is a **Transient Voltage Suppressor (TVS) Diode** manufactured by **Microsemi** (now part of **Microchip Technology**).  

### **Specifications:**  
- **Voltage - Reverse Standoff (V_RWM):** 38.9V  
- **Voltage - Breakdown (V_BR):** 43.3V (min)  
- **Voltage - Clamping (V_C):** 70.1V at 42.1A (peak pulse current)  
- **Peak Pulse Current (I_PP):** 42.1A (8/20μs waveform)  
- **Power - Peak Pulse (P_PP):** 3000W (typical)  
- **Operating Temperature Range:** -55°C to +150°C  
- **Package:** DO-214AB (SMC)  

### **Descriptions:**  
- Designed for **surge protection** in high-speed data lines and sensitive electronics.  
- Provides **ESD and transient overvoltage protection** for applications such as telecommunications, automotive, and industrial systems.  
- **Unidirectional** TVS diode, meaning it clamps positive transients only.  

### **Features:**  
- **Low Clamping Voltage** for effective transient suppression.  
- **Fast Response Time** (typically <1ns).  
- **High Surge Capability** (3000W peak pulse power).  
- **RoHS Compliant** and lead-free.  
- **Reliable Performance** under harsh environmental conditions.  

This diode is commonly used for protecting circuits from **lightning strikes, inductive load switching, and electrostatic discharge (ESD)**.

Application Scenarios & Design Considerations

TECHNICAL SPECIFICATIONS OF SURFACE MOUNT TRANSIENT VOLTAGE SUPPRESSOR

Alternative Part Number

  • 1SMC45AT3G --: Same 1500W unidirectional TVS in SMC package with 45V standoff, direct functional equivalent from a major supplier.
  • P6SMB45A --: 600W SMB unidirectional TVS with 45V standoff; lower power rating but suitable for many clamp applications where 1500W is not mandatory.
  • SMAJ45A --: 400W SMA unidirectional TVS with 45V standoff; smaller package alternative when lower surge capability is acceptable.

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