2N3740U4 Temperature-Power Derating Curve
PNP Power Transistor. Package, U4 Surface Mount.
2N3740U4 Temperature Derating Curve
Use the Graph to determine how much to derate power [wattage] based on ambient operational temperature. Transistor Derating Curves
If required use larger copper pads on the PWB to dissipate more heat into the Printed Wiring Board [PWB].
Temperature derating is a common design practice for electrical engineers.
Refer to MIL-PRF-19500/441J; SEMICONDUCTOR DEVICE, TRANSISTOR, PNP, SILICON, POWER, Types 2N3740, 2N3740U4, 2N3741, and 2N3741U4, JAN, JANTX, JANTXV, JANS, JANHC, and JANKC, [U4 Surface Mount, TO-66 Metal Can]
Maximum Ratings:
Collector Emitter Voltage = 60 volts dc
Collector Base Voltage = 60 volts dc
Emitter Base Voltage = 7 volts dc
Collector Current = 4 Amps dc
Base Current = 2 Amps dc
Power Dissipation 250C = 25 Watts
Operating Temperature = -65 to +2000C
Transistor Pinout: Pad 1. Emitter. Pad 2. Base, Pad 3. Collector.
The component pad locations and orientations are shown in the graphic.
Listing of Transistor Manufacturers and BJT vendors
MIL-PRF-19500; Semiconductor Devices, General Specification
MIL-STD-750; Test Methods for Semiconductor Devices
How to Derate; Guideline for Derating Electronic Components
