2N3441 Transistor Derating Guideline

2N3441 Temperature-Power Derating Curve
NPN Medium Power Transistor. Package, TO-66.
2N3441 Applications; General purpose Switching and linear amplifiers

2N3441 temperature-power derating graph
2N3441 Temperature Derating Curve

Use the Graph to determine the maximum power dissipation based on ambient temperature. The maximum wattage of 3 Watts occurs at 250C and begins to fall off above 300C. The 2N3441 may be derated by this formula above 25C; 0.142W/0C. Both the derating curves and the equation apply to the TO-66 package in free-air.
Attach the TO-66 metal package to a metal surface or heat sink when possible to operate at higher temperatures with higher power dissipations.

Refer to MIL-PRF-19500/369; Semiconductor Device, Transistor, NPN, Silicon, Power, Type 2N3441, JAN, JANTX, and JANTXV components, [TO-66]

2N3441 Maximum Operation Ratings:
Collector Emitter Voltage = 140 volts dc [VCEO]
Collector Base Voltage = 160 volts dc [VCBO]
Emitter Base Voltage = 7.0 volts dc [VEBO]
Base Current = 2 Amps dc [IB]
Collector Current = 3 Amps dc [IB]
Power Dissipation = 3.0 Watts 250C, Ambient
Power Dissipation = 25 Watts 250C, Case
Thermal Resistance = 70C/W
Operating Temperature [TJ] = -65 to +2000C
Storage Temperature [TSTG] = -65 to +2000C

Pin-out note; Terminal 1 Emitter, Terminal 2 Base, Case Collector.
Refer to the vendors data sheet for additional device parameters.

Use the graph by selecting a junction temperature for the 2N3441. Draw a line from the selected temperature, parallel to one of the curves. The line intersecting 110C is the most desirable operating point, do not exceed the operating line terminating at 200C.

Editor note; it may be that Mospec is still producing this component, at least they still supply their data sheet, and that document does not indicate that the part has been discontinued. Other manufacturers may still be producing this part, or vendors with stock.

TO-66 graph providing lead identification
TO-66 Package

Related Topics:
Transistor Derating Curves
TO-66 package, Flange Mount
NPN Transistor Derating Curves
Transistor Manufacturers

Related Data:
Unit Test Acronyms
DUT Definition

Component Derating Guide

Engineering terminology:
TO-66 Thermal data
NPN Transistor reliability
Military Qualified transistor

PC motherboard

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Modified 1/15/12
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