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SMCJ51A from FAIRCHILD,Fairchild Semiconductor

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SMCJ51A

Manufacturer: FAIRCHILD, MICROSEMI, CONCORD, Littelfu..

TECHNICAL SPECIFICATIONS OF SURFACE MOUNT TRANSIENT VOLTAGE SUPPRESSOR

Partnumber Manufacturer Quantity Availability
SMCJ51A FAIRCHILD, MICROSEMI, CONCORD, Littelfu.. 209000 In Stock

Description and Introduction

TECHNICAL SPECIFICATIONS OF SURFACE MOUNT TRANSIENT VOLTAGE SUPPRESSOR The SMCJ51A is a transient voltage suppressor (TVS) diode manufactured by Microsemi (now part of Microchip Technology). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**
- **Peak Pulse Power (PPP):** 1500W (10/1000μs waveform)  
- **Standoff Voltage (VWM):** 51V  
- **Breakdown Voltage (VBR):** 56.7V (min), 62.7V (max)  
- **Clamping Voltage (VC):** 82.1V at 10A  
- **Maximum Reverse Leakage Current (IR):** 1μA at VWM  
- **Operating Temperature Range:** -55°C to +150°C  
- **Junction Capacitance (CJ):** 400pF (typical)  
- **Package:** DO-214AB (SMC)  

### **Descriptions:**
- The SMCJ51A is designed to protect sensitive electronics from high-voltage transients, including ESD, lightning, and inductive switching events.  
- It is a unidirectional TVS diode, meaning it clamps positive voltage transients only.  
- The device meets industry standards for surge protection (IEC 61000-4-2, 4-4, 4-5).  

### **Features:**
- **Fast Response Time:** Typically less than 1ps.  
- **Low Clamping Voltage:** Provides effective protection for downstream components.  
- **High Surge Capability:** Withstands large transient currents.  
- **RoHS Compliant:** Lead-free and environmentally friendly.  
- **Reliable Performance:** Robust construction for industrial and automotive applications.  

For exact details, refer to the official Microsemi/Microchip datasheet.

Application Scenarios & Design Considerations

TECHNICAL SPECIFICATIONS OF SURFACE MOUNT TRANSIENT VOLTAGE SUPPRESSOR

Alternative Part Number

  • 1SMC51AT3G --: Same 1500W unidirectional 51V standoff TVS in SMC package; ON Semiconductor is the successor to Fairchild, so it is the closest form-fit-function replacement.
  • SMCJ51A-E3/57T --: Direct equivalent 1500W 51V unidirectional TVS diode in SMC package from a major supplier, with matching clamping voltage and surge rating.
  • P6SMB51A --: 600W 51V unidirectional TVS in SMB package; usable as a lower-power alternative when board space or surge requirements allow, from a well-known protection device vendor.
  • SMAJ51A --: 400W SMA TVS with identical 51V standoff voltage, a compact lower-power alternative for less severe surge environments.

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