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Product Detailed Parameters
- Description：TRANS PNP 45V 0.1A SOT-23-3
- Series：-
- Mfr：Comchip Technology
- Package：Tape & Reel (TR)
- 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)：-
- DC Current Gain (hFE) (Min) @ Ic, Vce：125 @ 2.2mA, 5V
- Power - Max：250 mW
- Frequency - Transition：100MHz
- Operating Temperature：-65°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3
- Grade：-
- Qualification：-
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Overview
The BC857B-HF is a PNP silicon general-purpose bipolar junction transistor manufactured by Comchip Technology. It is designed for switching and amplifier applications in surface-mount configurations. The device features a collector-base voltage of 50 V, an emitter-base voltage of 5 V, and a continuous collector current of 100 mA. Power dissipation is rated at 200 mW. The component operates within a temperature range of -65°C to +150°C and utilizes the SOT-323-3 package.
Feature Summary
- PNP polarity configuration suitable for general-purpose switching and amplification tasks
- Automotive-grade qualification ensuring reliability under varying environmental conditions
- Low noise performance characteristics optimized for signal processing applications
Applications
- General purpose switching circuits
- Amplifier stages in audio or signal processing equipment
- Automotive electronic control modules
Procurement Notes
Verify the specific suffix 'HF' indicates halogen-free compliance as per manufacturer standards. Confirm RoHS status through official documentation before integration. Ensure the SOT-323-3 footprint matches the target PCB design. Validate that the automotive grade designation meets specific project reliability requirements. Cross-reference datasheet revisions to ensure parameter consistency.
Selection Notes
Select this component when a PNP transistor with 50V collector-base voltage and 100mA continuous current capability is required. The SOT-323-3 package offers space efficiency for compact designs. Consider the -65°C to +150°C operating range for harsh environments. Verify that the 200mW power dissipation rating aligns with thermal management strategies. Compare against standard BC857 variants if automotive certification is not mandatory.
Part Context
This part belongs to the BC857 series of small-signal PNP transistors. It serves as a complement to NPN counterparts like the BC847 series. The automotive variant ensures higher reliability standards compared to commercial grades. It is widely used in consumer electronics and industrial control systems requiring low-power switching.
FAQ
What is the maximum collector-base voltage for the BC857B-HF?
The maximum collector-base voltage (VCBO) is 50 V.
Is the BC857B-HF suitable for high-frequency applications?
Yes, it is designed for switching and amplifier applications, though specific frequency limits depend on the circuit configuration.
What packaging does the BC857B-HF use?
It uses the SOT-323-3 surface-mount package.
