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Product Detailed Parameters
- Description：TRANS PNP 45V 0.1A SOT23-3
- Series：-
- Mfr：Diotec Semiconductor
- Package：Bulk
- Transistor Type：PNP
- Current - Collector (Ic) (Max)：100 mA
- Voltage - Collector Emitter Breakdown (Max)：45 V
- Vce Saturation (Max) @ Ib, Ic：650mV @ 5mA, 100mA
- Current - Collector Cutoff (Max)：15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce：125 @ 2mA, 5V
- Power - Max：250 mW
- Frequency - Transition：100MHz
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3 (TO-236)
- Grade：Automotive
- Qualification：AEC-Q101
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Overview
The BC857A-AQ is a PNP general-purpose small-signal transistor manufactured by Diotec Semiconductor. It operates in an SOT-23 (TO-236) surface-mount package and is qualified to the AEC-Q101 automotive standard. The device supports a maximum collector current of -100 mA and a power dissipation of 250 mW. Key electrical ratings include a collector-emitter voltage of -45 V, a collector-base voltage of -50 V, and an emitter-base voltage of -5 V. The DC current gain (hFE) for Group A ranges from 125 to 250 at IC = 2 mA. Transition frequency is specified at 100 MHz, with a junction temperature range of -55°C to +150°C.
Feature Summary
- Automotive-grade reliability through AEC-Q101 qualification
- Three distinct DC current gain groups for precise amplification control
- RoHS compliant and conflict minerals free construction
Applications
- Signal processing circuits
- General switching applications
- Amplification stages
Procurement Notes
Verify that the ordering suffix matches the required AEC-Q101 qualification level. Confirm the specific hFE group (A, B, or C) aligns with circuit design requirements. Ensure the SOT-23 footprint matches the target PCB layout. Check for RoHS compliance documentation if environmental regulations apply. Validate thermal resistance parameters against the intended operating environment.
Selection Notes
Select this component when automotive reliability standards are mandatory for PNP switching tasks. The AEC-Q101 qualification ensures suitability for harsh environments compared to commercial grades. Consider the specific hFE group needed for signal fidelity. Evaluate the SOT-23 package size constraints against available board space. Compare thermal performance metrics with alternative packages if higher power handling is required.
Part Context
This part belongs to the BC856...BC860 series of SMD universal PNP transistors. It serves as the industrial/automotive grade counterpart to commercial variants lacking the AQ suffix. The BC857 variant specifically offers a 45V rating, distinguishing it from the lower-voltage BC856 and BC860 models within the same family.
Replacement Considerations
Direct substitutes include other AEC-Q101 qualified PNP transistors in SOT-23 packages. Verify pinout compatibility and matching voltage/current ratings before substitution.
