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Product Detailed Parameters
- Description：TRANS PNP 45V 0.1A SOT23-3
- Series：-
- Mfr：Diotec Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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：-
- Qualification：-
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Overview
The Diotec Semiconductor BC857A is a general-purpose PNP small-signal transistor housed in an SOT-23 surface-mount package. It features a maximum collector-emitter voltage (VCEO) of 45 V and a collector-base voltage (VCBO) of 50 V. The device supports a continuous DC collector current of -100 mA with a peak collector current rating of 200 mA. Power dissipation reaches 300 mW when mounted on a PCB with the minimum recommended pad layout. The component operates within a junction temperature range of -55°C to +150°C. Current gain groups are defined by hFE ranges, with Group A specified at 125 to 250.
Feature Summary
- Designed for universal application in signal processing, switching, and amplification circuits.
- Available in three distinct DC current gain groups to accommodate varying circuit requirements.
- Compliant with RoHS directives without exemptions and adheres to REACH regulations.
Applications
- Signal processing
- Switching applications
- Amplification
Procurement Notes
Verify the specific ordering suffix against the manufacturer's documentation to confirm the exact performance grade. Standard versions without suffixes represent industrial grade components. Suffixes such as -Q or -AQ indicate compliance or qualification under automotive standards like AEC-Q101. Confirm that the required current gain group matches the design specifications before procurement.
Selection Notes
Select this component based on the required voltage ratings and thermal management capabilities. Ensure the operating environment stays within the specified -55°C to +150°C junction temperature limits. Consider the power dissipation constraints relative to the PCB copper pad area. Verify that the selected current gain group aligns with the necessary amplification factors for the intended application.
Part Context
This component belongs to the BC856...BC860 series of SMD general-purpose PNP transistors manufactured by Diotec Semiconductor. The series includes complementary NPN transistors and variants with different voltage ratings and gain characteristics. These devices are widely used in standard commercial and industrial electronic designs requiring reliable small-signal handling.
Replacement Considerations
Check datasheets for other manufacturers offering identical pinouts and electrical parameters. Verify that replacement parts meet the same voltage, current, and thermal ratings. Ensure compatibility with existing PCB layouts and assembly processes.
FAQ
What is the maximum collector-emitter voltage for the BC857A?
The maximum collector-emitter voltage (VCEO) is 45 V.
How many current gain groups are available for this transistor?
There are three current gain groups: Group A, Group B, and Group C.
What is the typical thermal resistance from junction to ambient?
The typical thermal resistance is 417 K/W when mounted on a PCB with the minimum recommended pad layout.
