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Fairchild BC517 NPN Darlington Transistor User Guide

Summary

The BC517 is a high-performance NPN Darlington Transistor engineered for applications demanding exceptionally high current gain up to 1.0A. This datasheet provides circuit designers and engineers with comprehensive technical specifications, including absolute maximum ratings, detailed electrical characteristics, and crucial thermal handling data. Use this guide to ensure reliable integration into your power control circuits and switching designs.

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517 N PN arlington Transistor

January 2005

BC517 NPN Darlington Transistor This device is designed for applications requiring extremely high current gain at currents to 1.0A. Sourced from process 05.

TO-921

1. Collector 2. Base 3. Emitter

Absolute Maximum Ratings * Ta = 25°C unless otherwise noted Symbol Parameter Value Units VCEO Collector-Emitter Voltage

VCBO Collector-Base Voltage

VEBO Emitter-Base Voltage

IC Collector Current - Continuous 1.2

TJ, TSTG Operating and Storage Junction Temperature Range -55 ~ 150 °C

* These ratings are limiting values above which the serviceability of any semiconductor device may impaired.

NOTES: 1. These ratings are based on a maximum junction temperature of 150 degrees C.

2. These are steady state limits. The factory should be consulted on applications involving pulsed or low duty cycle operations.

Electrical Characteristics Ta = 25°C unless otherwise noted Symbol Parameter Conditions Min. Max Units Off Characteristics V(BR)CEO Collector-Emitter Breakdown Voltage * IC = 2.0m A, IB = 0 V(BR)CBO Collector-Base Breakdown Voltage IC = 10µA, IE = 0

V(BR)EBO Emitter-Base Breakdown Voltage IE = 100n A, IC = 0

ICBO Collector Cut-off Current VCB = 30V, IE = 0 n A

On Characteristics * h FE DC Current Gain VCE = 2.0V, IC = 20m A 30,000

VCE(sat) Collector-Emitter Saturation Voltage IC = 100m A, IB = 0.1m A

VBE(on) Base-Emitter On Voltage IC = 10m A, VCE = 5.0V 1.4

Thermal Characteristics Ta = 25°C unless otherwise noted Symbol Parameter Value Units PD Total Device Dissipation m W

Derate above 25°C 5.0 m W/°C

RθJC Thermal Resistance, Junction to Case 83.3 °C/W

RθJA Thermal Resistance, Junction to Ambient °C/W

©2005 Fairchild Semiconductor Corporation www.fairchildsemi.com BC517 Rev. A

Page Summary Contents For Fairchild BC517 NPN Darlington Transistor User Guide

Page 1 517 N PN arlington Transistor January 2005 BC517 NPN Darlington Transistor This device is designed for applications requiring extremely high current gain at currents to 1.0A. Sourced from process 05. ...
Page 2 517 N PN arlington Transistor Mechanical Dimensions TO-92 1.27TYP 1.27TYP 0.38 Dimensions in Millimeters www.fairchildsemi.com BC517 Rev. A
Page 3 TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. ACEx™ FAST...

Manual Details

Brand Fairchild
Pages 3
File Size 27.41 KB
Published May 31, 2026
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Frequently Asked Questions

Can this transistor be used in life support devices or systems?

No. It is not authorized for use as a critical component in life-support devices unless you receive express written approval from Fairchild Semiconductor Corporation.

What does the maximum junction temperature range allow?

The operating and storage junction temperature range is specified as -55 to 150 °C.

Are the provided ratings safe for pulsed operations?

No, these are steady-state limits. For applications involving pulsed or low duty cycle operations, you must consult the factory.