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SMAJ43A from MICROSEMI

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SMAJ43A

Manufacturer: MICROSEMI, CONCORD, FAIRCHILD

SURFACE MOUNT UNIDIRECTIONAL AND BIDIRECTIONAL TRANSIENT VOLTAGE SUPPRESSORS

Partnumber Manufacturer Quantity Availability
SMAJ43A MICROSEMI, CONCORD, FAIRCHILD 113000 In Stock

Description and Introduction

SURFACE MOUNT UNIDIRECTIONAL AND BIDIRECTIONAL TRANSIENT VOLTAGE SUPPRESSORS The **SMAJ43A** is a **Transient Voltage Suppressor (TVS) Diode** manufactured by **Microsemi** (now part of **Microchip Technology**). Below are its key specifications, descriptions, and features based on available data:

### **Specifications:**
- **Voltage - Reverse Standoff (V₃₀):** **43V**  
- **Voltage - Breakdown (Min):** **47.8V**  
- **Voltage - Clamping (Max) @ Iₚₚ:** **69.4V** (at **10A** peak pulse current)  
- **Peak Pulse Current (Iₚₚ):** **10A** (8/20µs waveform)  
- **Power - Peak Pulse:** **600W**  
- **Operating Temperature Range:** **-55°C to +150°C**  
- **Package / Case:** **DO-214AC (SMA)**  
- **Polarity:** **Unidirectional**  

### **Descriptions:**
- Designed for **transient overvoltage protection** in electronic circuits.  
- Provides **ESD (Electrostatic Discharge) and surge protection** for sensitive components.  
- Suitable for **high-speed data lines, power supplies, and communication interfaces**.  

### **Features:**
- **Low Clamping Voltage** for effective protection.  
- **Fast Response Time** (typically <1ps).  
- **High Surge Capability** (up to **10A** peak pulse).  
- **RoHS Compliant** (lead-free and environmentally friendly).  
- **Unidirectional Configuration** (protects against positive transients).  

This diode is commonly used in **automotive, industrial, and telecommunications applications** where transient voltage suppression is critical.  

*(Note: Always refer to the latest datasheet from Microchip for updated specifications.)*

Application Scenarios & Design Considerations

SURFACE MOUNT UNIDIRECTIONAL AND BIDIRECTIONAL TRANSIENT VOLTAGE SUPPRESSORS

Alternative Part Number

  • SMBJ43A --: Same 43V standoff unidirectional TVS in a larger SMB package, offering higher surge rating and a drop-in functional replacement.
  • P6SMB43A --: 600W unidirectional TVS with 43V standoff in SMB package, widely available and electrically compatible for most clamping applications.
  • 1SMA43AT3G --: 400W unidirectional TVS diode with 43V standoff in SMA package, matching the original package and voltage class.
  • P6SMB47A --: SMB-packaged unidirectional TVS with a comparable 43 V standoff class; widely available and a common drop-in substitute.
  • 1SMB43AT3G --: SMB unidirectional TVS with matching 43 V standoff and similar clamping performance; alternate series prefix for clear identification.

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