2N3739 Transistor Derating Curves

2N3739 Temperature-Power Derating Curve
NPN Silicon Power Transistor. Package, TO-66 metal Can.
2N3739 Applications;

2N3739 Temperature-Power Derating Curve
2N3739 Transistor Operational DC Power Derating Curve

Use the Graph to determine how much to derate power [wattage] based on operating case temperature. To function above the curves attach the TO-66 metal can to a heat sink. Refer to Transistor Derating Curves for other BJT types and derating definitions.
Temperature derating is a standard design practice for electrical engineers, but the chart should only be used as a guideline or recommendation. Note, many data sheets use ambient temperature while the graph relates to case temperature [Tc].
Use thermal grease and or a metal washer to enhance heat conduction. Data Sheet Equation; Derate linearly 0.114 W/0C for Tc above 250C

Refer to MIL-PRF-19500/402; Semiconductor Device, Transistor, NPN, Silicon, Power, Type 2N3739, JAN, JANTX, and JANTXV, [TO-66], similar case style TO-213AA.

2N3739 Maximum Ratings:
Collector Emitter Voltage = 300 volts dc [VCEO]
Collector Base Voltage = 325 volts dc [VCBO]
Emitter Base Voltage = 6 volts dc [VEBO]
Base Current = 0.5 amps dc [IB]
Collector Current = 1.0 amps dc [IC]
Power Dissipation = 20 Watt [Case; 250C]
Operating Temperature TJ= -55 to +2000C
Storage Temperature TSTG= -55 to +2000C

TO-66 Pin Out: Lead 1 = Emitter, lead 2 = Base, Case = Collector.

TO-66 Transistor Package
TO-66 metal Can

Related Vendors;
Transistor Manufacturers

Related Data:
Unit Test Acronyms
DUT Definition

Component Derating Guide

Semiconductor Devices, General Spec.

PC motherboard

Distributor rolodex Electronic Components Electronic Equipment EDA CDROM Software Engineering Standards, BOB card Cabled Computer Bus Electronic Engineering Design Table Conversion DB9-to-DB25.
DistributorsComponents Equipment Software Standards Buses Design Reference
Modified 1/15/12
Copyright © 1998 - 2016 All rights reserved Larry Davis