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SMCJ170A from MICROSEMI

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SMCJ170A

Manufacturer: MICROSEMI, CONCORD, FAIRCHILD

Surface mount transient voltage suppressor. 1500 watts peak power. Reverse stand-off voltage VRWM = 170 V. Test current IT = 1 mA.

Partnumber Manufacturer Quantity Availability
SMCJ170A MICROSEMI, CONCORD, FAIRCHILD 113000 In Stock

Description and Introduction

Surface mount transient voltage suppressor. 1500 watts peak power. Reverse stand-off voltage VRWM = 170 V. Test current IT = 1 mA. The **SMCJ170A** is a **Transient Voltage Suppressor (TVS) Diode** manufactured by **Fairchild Semiconductor** (now part of **ON Semiconductor**).  

### **Specifications:**  
- **Voltage - Reverse Standoff (V₃₀):** 170V  
- **Voltage - Breakdown (VBR):** 189V (min)  
- **Voltage - Clamping (Vc):** 274V (at 10A)  
- **Peak Pulse Current (Ipp):** 10A (8/20μs waveform)  
- **Power - Peak Pulse (Pppm):** 1500W  
- **Operating Temperature:** -55°C to +150°C  
- **Package:** DO-214AB (SMC)  

### **Description:**  
The **SMCJ170A** is designed to protect sensitive electronics from high-voltage transients, such as ESD, lightning, and inductive load switching. It provides fast response to transient overvoltage events.  

### **Features:**  
- **Low Clamping Voltage** for effective protection.  
- **High Surge Capability** (1500W peak pulse power).  
- **Fast Response Time** (typically <1ps).  
- **RoHS Compliant** (lead-free).  

This diode is commonly used in **telecommunications, industrial controls, and power supply protection circuits**.  

*(Note: Fairchild Semiconductor was acquired by ON Semiconductor in 2016, but legacy part numbers like SMCJ170A may still be referenced under the original manufacturer name.)*

Application Scenarios & Design Considerations

Surface mount transient voltage suppressor. 1500 watts peak power. Reverse stand-off voltage VRWM = 170 V. Test current IT = 1 mA.

Alternative Part Number

  • 1.5SMC170A --: Same 1500W peak pulse power and 170V standoff unidirectional TVS in the SMC (DO-214AB) package, widely available and a direct functional drop-in.
  • SMDJ170A --: 3000W SMC-package unidirectional TVS with 170V standoff; higher surge rating provides extra margin while keeping the same footprint and clamping behavior.
  • P6SMB170A --: 600W unidirectional TVS with 170V standoff in SMB package; suitable when lower surge capability is acceptable and a smaller footprint is preferred.
  • SMAJ170A --: 400W SMA unidirectional TVS with identical 170V standoff and clamping behavior; good compact alternative when board space is limited and surge energy is lower.
  • 1SMC170A --: Same 1500W unidirectional TVS with 170V standoff voltage, different series naming, widely available and electrically equivalent.

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