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SMAJ78A from ON,ON Semiconductor

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SMAJ78A

Manufacturer: ON, FAIRCHILD, MICROSEMI, VISHAY, CONCORD

SURFACE MOUNT UNIDIRECTIONAL AND BIDIRECTIONAL TRANSIENT VOLTAGE SUPPRESSORS
Partnumber Manufacturer Quantity Availability
SMAJ78A ON, FAIRCHILD, MICROSEMI, VISHAY, CONCORD 119800 In Stock

Description and Introduction

SURFACE MOUNT UNIDIRECTIONAL AND BIDIRECTIONAL TRANSIENT VOLTAGE SUPPRESSORS The **SMAJ78A** is a transient voltage suppressor (TVS) diode manufactured by **Fairchild Semiconductor**. Here are its specifications, descriptions, and features:

### **Specifications:**
- **Voltage - Reverse Standoff (V₃₀):** 78V  
- **Voltage - Breakdown (Min):** 86.7V  
- **Voltage - Clamping (Max) @ Ipp:** 125V  
- **Current - Peak Pulse (10/1000µs):** 15.3A  
- **Power - Peak Pulse:** 1500W  
- **Operating Temperature:** -55°C to +150°C  
- **Package / Case:** DO-214AC (SMA)  

### **Descriptions:**
- Designed to protect sensitive electronics from high-voltage transients.  
- Provides bidirectional protection (avalanche breakdown).  
- Low clamping voltage for effective surge suppression.  

### **Features:**
- **High Surge Capability:** Handles large transient currents.  
- **Fast Response Time:** Reacts quickly to overvoltage events.  
- **RoHS Compliant:** Meets environmental standards.  
- **Low Leakage Current:** Minimizes power loss in normal operation.  

This diode is commonly used in **power supplies, communication systems, and automotive applications** for ESD and surge protection.  

(Note: Always refer to the official datasheet for precise details.)

Application Scenarios & Design Considerations

SURFACE MOUNT UNIDIRECTIONAL AND BIDIRECTIONAL TRANSIENT VOLTAGE SUPPRESSORS

Alternative Part Number

  • P6SMB78A --: Same 78V standoff unidirectional TVS in SMB package with comparable 600W peak pulse rating, widely available and pin-compatible.
  • SMBJ78A --: Direct SMB-package 78V unidirectional TVS with 600W surge capability, matching the SMAJ78A electrical role and footprint.
  • 1SMB78AT3G --: Same manufacturer family equivalent 78V unidirectional SMB TVS with 600W rating, ensuring consistent process and reliability.
  • P6SMB91A --: Same SMB (DO-214AA) package unidirectional TVS with comparable 91V standoff and 400W/600W peak pulse rating, widely available and pin-compatible.
  • SMBJ85A --: SMB-package unidirectional TVS diode with comparable clamping performance and widely available as a cross-series alternative.
  • 1SMB90AT3G --: SMB unidirectional TVS with similar standoff and surge rating, from a different series and manufacturer for second-source flexibility.

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