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Product Detailed Parameters
- Description：TRANS PNP 45V 4A TO-126
- Series：-
- Mfr：MCC (Micro Commercial Components)
- Package：Bulk
- Transistor Type：PNP
- Current - Collector (Ic) (Max)：4:00 AM
- Voltage - Collector Emitter Breakdown (Max)：45 V
- Vce Saturation (Max) @ Ib, Ic：600mV @ 200mA, 2A
- Current - Collector Cutoff (Max)：100µA
- DC Current Gain (hFE) (Min) @ Ic, Vce：40 @ 2A, 1V
- Power - Max：1.25 W
- Frequency - Transition：3MHz
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-225AA, TO-126-3
- Supplier Device Package：TO-126
- Grade：-
- Qualification：-
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Overview
The BD438-BP is a PNP silicon epitaxial-base power transistor manufactured by Micro Commercial Components. It is housed in a SOT-32 plastic package and designed for medium-power linear and switching applications. The device features a maximum collector-emitter voltage of 45V, a maximum collector current of 4A, and a maximum power dissipation of 36W. It operates within a junction temperature range of -55°C to 150°C.
Feature Summary
- Complementary PNP counterpart to the BD437 NPN series
- Epitaxial-base silicon construction for reliable performance
- Suitable for car-radio output stages and general medium-power applications
Applications
- Car-radio output stages
- Medium power linear circuits
- Switching applications
Procurement Notes
Verify the specific datasheet version for the BD438-BP variant, as official documentation often groups it with the BD433/BD435/BD437 NPN series. Confirm RoHS compliance status directly from the manufacturer's declaration. Ensure the SOT-32 package dimensions match your PCB footprint requirements before finalizing procurement.
Selection Notes
Select this component when a PNP transistor with 4A continuous current capability and 45V breakdown voltage is required. It serves as the complementary pair to the BD437 NPN transistor. Consider the 36W power dissipation limit and thermal management needs for high-current linear operations. Verify that the SOT-32 package is compatible with the intended assembly process.
Part Context
The BD438-BP belongs to a family of complementary silicon power transistors produced by STMicroelectronics and licensed or distributed under various brands like MCC. These devices are engineered for robustness in audio and power supply circuits. The 'BP' suffix typically denotes a specific packaging or compliance variant within the MCC product line.
Replacement Considerations
Official substitutes include the BD436 (MCC) and BD438 (STMicroelectronics). Verify pinout compatibility and thermal characteristics when replacing. Ensure the replacement part meets the same 4A current and 45V voltage ratings.
