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Product Detailed Parameters
- Description：TRANS PNP 22V 4A TO-126-3
- Series：-
- Mfr：Fairchild Semiconductor
- Package：Tube
- Transistor Type：PNP
- Current - Collector (Ic) (Max)：4:00 AM
- Voltage - Collector Emitter Breakdown (Max)：22 V
- Vce Saturation (Max) @ Ib, Ic：500mV @ 200mA, 2A
- Current - Collector Cutoff (Max)：100µA
- DC Current Gain (hFE) (Min) @ Ic, Vce：40 @ 10mA, 5V
- 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 BD434STU is a complementary PNP silicon epitaxial-base power transistor manufactured by Fairchild Semiconductor. It belongs to the BD43x series, which includes NPN counterparts such as the BD433 and BD435. The device is housed in a Jedec SOT-32 plastic package. It is designed for medium power linear and switching applications, with specific suitability for car-radio output stages.
Feature Summary
- Complementary PNP configuration within the BD43x family
- Silicon epitaxial-base construction
- Jedec SOT-32 plastic packaging
Applications
- Medium power linear applications
- Switching applications
- Car-radio output stages
Procurement Notes
Verify the manufacturer status carefully, as source data indicates this component may be obsolete or restricted to existing customer support. Confirm the exact package designation matches the required SOT-32 form factor. Ensure the part number corresponds to the PNP variant rather than the NPN equivalents like the BD433. Cross-reference with ON Semiconductor documentation if Fairchild sources are unavailable.
Selection Notes
Select this component when a PNP power transistor is required for medium power linear or switching circuits. It serves as the complementary pair to the BD433 NPN transistor. Consider its specific suitability for automotive audio output stages. Verify that the SOT-32 package fits the board layout constraints. Check current availability status due to potential obsolescence.
Part Context
The BD434STU is part of the BD43x series of complementary silicon power transistors. This series includes NPN types (BD433, BD435, BD437) and their corresponding PNP complements (BD434, BD436, BD438). All devices share similar construction and application profiles, intended for medium power uses. The series is noted for compatibility in push-pull configurations.
Replacement Considerations
Public confirmed substitute part numbers include BD436, BD438, and BD433 (as complementary NPN). Verify electrical parameters match requirements when substituting.
