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SMAJ28A from TAIWANSEMICO

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SMAJ28A

Manufacturer: TAIWANSEMICO, TAIWAN SEMICONDUCTOR, MICROSEMI, ON, VISHAY, FAIRCHILD, CONCORD

SURFACE MOUNT UNIDIRECTIONAL AND BIDIRECTIONAL TRANSIENT VOLTAGE SUPPRESSORS
Partnumber Manufacturer Quantity Availability
SMAJ28A TAIWANSEMICO, TAIWAN SEMICONDUCTOR, MICROSEMI, ON, VISHAY, FAIRCHILD, CONCORD 131800 In Stock

Description and Introduction

SURFACE MOUNT UNIDIRECTIONAL AND BIDIRECTIONAL TRANSIENT VOLTAGE SUPPRESSORS The SMAJ28A is a unidirectional TVS (Transient Voltage Suppressor) diode manufactured by CONCORD. Below are its specifications, descriptions, and features based on factual data from Ic-phoenix technical data files:  

### **Specifications:**  
- **Working Peak Reverse Voltage (VRWM):** 28V  
- **Breakdown Voltage (VBR):** 31.1V (min) to 34.4V (max)  
- **Clamping Voltage (VC):** 45.4V at 10A (IPP)  
- **Peak Pulse Current (IPP):** 10A (8/20μs waveform)  
- **Maximum Reverse Leakage Current (IR):** 1μA at VRWM  
- **Junction Capacitance (CJ):** 500pF (typical) at 0V, 1MHz  
- **Operating Temperature Range:** -55°C to +150°C  
- **Package:** DO-214AC (SMA)  

### **Descriptions:**  
- The SMAJ28A is designed to protect sensitive electronics from voltage transients, including ESD, lightning, and inductive load switching.  
- It is a unidirectional TVS diode, meaning it clamps positive transients only.  
- The device meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (Surge) standards.  

### **Features:**  
- **Fast Response Time:** Typically less than 1ps.  
- **High Surge Capability:** Handles up to 10A (8/20μs).  
- **Low Clamping Voltage:** Ensures protection for downstream components.  
- **RoHS Compliant:** Lead-free and environmentally friendly.  
- **Reliable Performance:** Robust construction for industrial and automotive applications.  

For exact application guidelines, refer to the manufacturer’s datasheet.

Application Scenarios & Design Considerations

SURFACE MOUNT UNIDIRECTIONAL AND BIDIRECTIONAL TRANSIENT VOLTAGE SUPPRESSORS

Alternative Part Number

  • P4SMA30A --: Same SMA package unidirectional TVS with comparable 28V standoff class and 400W peak pulse rating, widely available from a major supplier.
  • SMBJ28A --: Unidirectional 28V standoff TVS in SMB package with higher 600W surge rating, a common drop-in upgrade when board space allows.
  • 1SMA28AT3G --: SMA-packaged 28V unidirectional TVS diode with similar clamping characteristics, offered by a well-established manufacturer.
  • P4SMAJ28A --: Same SMA package unidirectional 400W TVS with 28V standoff voltage, direct electrical equivalent from a major supplier.
  • SMAJ28A-E3/61 --: Vishay's SMAJ series 400W TVS diode with matching 28V standoff and clamping characteristics, widely available and reliable.
  • 1SMA30AT3G --: SMA-package unidirectional TVS with 30V standoff and similar peak pulse power, suitable drop-in style replacement for 28V rail protection.
  • P6SMB28A --: Same 28V standoff unidirectional TVS in SMB package with comparable 400W peak pulse rating; widely available and pin-compatible.
  • 1SMB28AT3G --: SMB 28V unidirectional TVS diode with similar clamping voltage and surge rating, suitable alternative from a major supplier.
  • TPSMA30A --: SMA-package unidirectional TVS diode with 30V standoff and comparable surge rating, offering a different series as a cross-reference option.

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