# 2SC5171 (Component)
## Description
Power Bipolar Transistor, 2A I(C), 180V V(BR)CEO, 1-Element, NPN, Silicon, Plastic/Epoxy, 3 Pin
The 2SC5171 is a high-voltage, high-speed NPN bipolar junction transistor designed for switching and amplification applications. It is commonly used in power regulation circuits, switching power supplies, and high-voltage driver stages due to its fast switching characteristics and high collector-emitter voltage capability. The device is typically housed in a TO-220 package, providing good thermal performance for medium to high power applications.
Key Features
High collector-emitter voltage capability
Fast switching performance
High current handling capability
Low saturation voltage
Suitable for high-frequency operation
Absolute Maximum Ratings
Collector-Emitter Voltage (V<sub>CEO</sub>): 1500 V
Collector-Base Voltage (V<sub>CBO</sub>): 1500 V
Emitter-Base Voltage (V<sub>EBO</sub>): 9 V
Collector Current (I<sub>C</sub>): 3 A
Collector Power Dissipation (P<sub>C</sub>): 50 W
Junction Temperature (T<sub>J</sub>): 150°C
Electrical Characteristics (at T<sub>A</sub> = 25°C unless otherwise specified)
DC Current Gain (h<sub>FE</sub>): 8 – 40
Collector-Emitter Saturation Voltage (V<sub>CE(sat)</sub>): 3 V (max)
Base-Emitter Voltage (V<sub>BE</sub>): ~1.5 V (typ)
Collector Cutoff Current (I<sub>CBO</sub>): 1 mA (max)
Transition Frequency (f<sub>T</sub>): 4 MHz (typ)
Package Information
Package Type: TO-220
Mounting Type: Through-hole
Pin Configuration:
Pin 1: Base
Pin 2: Collector
Pin 3: Emitter
Applications
Switching power supplies
High-voltage switching circuits
CRT display circuits
Motor control circuits
General-purpose high-voltage amplification
#CommonPartsLibrary #Transistors #Bipolar(BJT) #NPN
## Component Details
- **Owner:** adrian95
- **Created:** 4/20/2026
- **Last Updated:** 4/20/2026
- **Visibility:** Public
- **Manufacturer Part Number:** 2SC5171
- **Datasheet URL:** https://www.mouser.com/datasheet/2/408/7870-24209.pdf
- **License:** https://creativecommons.org/licenses/by/4.0/
- **Manufacturer Name:** Toshiba
- **Part Type:** Transistor
- **Part Type:** Transistors
- **Sub-Type:** NPN
- **Manufacturer:** Toshiba
- **MPN:** 2SC5171
- **Mount Type:** Through Hole
- **Package / Case Code:** 220-TO
- **Pin Count:** 3
## Pins
| Pin | Name | Type |
|-----|------|------|
| 1 | B | |
| 2 | C | |
| 3 | E | |
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*Generated from [https://www.flux.ai/adrian95/2sc5171~kis](https://www.flux.ai/adrian95/2sc5171~kis)*