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Product Detailed Parameters
- Description：TRANS PNP 80V 4A TO-126-3
- Series：-
- Mfr：Fairchild Semiconductor
- Package：Bulk
- Transistor Type：PNP
- Current - Collector (Ic) (Max)：4:00 AM
- Voltage - Collector Emitter Breakdown (Max)：80 V
- Vce Saturation (Max) @ Ib, Ic：800mV @ 200mA, 2A
- Current - Collector Cutoff (Max)：100µA
- DC Current Gain (hFE) (Min) @ Ic, Vce：40 @ 500mA, 1V
- Power - Max：36 W
- Frequency - Transition：3MHz
- Operating Temperature：150°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-225AA, TO-126-3
- Supplier Device Package：TO-126-3
- Grade：-
- Qualification：-
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Overview
The BD442STU is a PNP silicon epitaxial planar power transistor manufactured by onsemi, formerly Fairchild Semiconductor. It utilizes a "Base Island" layout to achieve high gain and low saturation voltage. The device is housed in a TO-126-3 (TO-220 variant) through-hole package. Key electrical ratings include a maximum collector current of 4 A, a collector-emitter voltage of 80 V, and a collector-base voltage of 80 V. Power dissipation is rated at 36 W, with an operating temperature range from -65°C to +150°C.
Feature Summary
- PNP polarity configuration for power switching applications
- Epitaxial planar technology construction
- "Base Island" layout design for enhanced performance
Applications
- Linear amplifier circuits
- Switching regulator designs
- Power driver stages
Procurement Notes
Verify the manufacturer designation carefully, as the component is produced by onsemi following the acquisition of Fairchild's discrete semiconductor business. Confirm the specific suffix STU corresponds to the TO-126-3 package style required for your board layout. Check current availability status as this part may be subject to obsolescence or lifecycle changes.
Selection Notes
Select this component when a PNP power transistor with 80 V breakdown and 4 A continuous current capability is required. Ensure the thermal management system can handle the 36 W dissipation rating in the TO-126-3 package. Compare against complementary NPN types like the BD441 if push-pull configurations are needed.
Part Context
This device belongs to the BD44x series of medium-power transistors. The NPN counterpart is the BD441. These components are designed for general-purpose power amplification and switching tasks where moderate current handling and voltage ratings are sufficient.
Replacement Considerations
Direct substitutes include the BD441 for NPN requirements. Verify pinout compatibility with TO-126 packages. Cross-reference with other 80V PNP power transistors from different manufacturers if sourcing constraints exist.
