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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)：15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce：-
- 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 BC857C-HF is a PNP silicon general-purpose bipolar junction transistor manufactured by Comchip Technology. It is housed in an SOT-323 surface-mount package and rated for a collector-emitter voltage of 45V, with a continuous collector current of 100mA and power dissipation of 200mW. The device features a DC current gain (hFE) range of 420 to 800 and a transition frequency of 250MHz. Operating temperatures span from -65°C to +150°C.
Feature Summary
- High DC current gain ranging from 420 to 800 for effective signal amplification
- Transition frequency of 250MHz suitable for general-purpose switching applications
- Automotive-grade qualification ensuring reliability under varying thermal conditions
Applications
- General-purpose switching circuits
- Signal amplification stages
- Automotive electronic control modules
Procurement Notes
Verify the specific suffix 'HF' indicates halogen-free compliance as per manufacturer documentation. Confirm the automotive grade designation aligns with project requirements. Check for RoHS certification status directly from the datasheet. Ensure the SOT-323 footprint matches the PCB layout constraints before finalizing procurement.
Selection Notes
Select this component when a high-gain PNP transistor is required in a compact SOT-323 package. The 420-800 hFE range provides flexibility for various biasing configurations. Consider the 250MHz transition frequency for moderate-speed switching needs. Verify that the 200mW power dissipation rating meets the thermal management requirements of the target application environment.
Part Context
This part belongs to the BC857 series of PNP transistors, widely used in consumer and industrial electronics. The 'C' suffix typically denotes the high-gain binning category. The 'HF' suffix specifies halogen-free manufacturing. It serves as a standard replacement for legacy small-signal PNP transistors in space-constrained designs requiring reliable performance.
Replacement Considerations
- BC857CW-G
- BC857C
FAQ
What is the maximum DC current gain for the BC857C-HF?
The maximum DC current gain (hFE) is 800.
Is the BC857C-HF qualified for automotive applications?
Yes, the product description explicitly identifies it as an automotive-grade transistor.
What is the transition frequency (fT) of this transistor?
The transition frequency is specified as 250 MHz.
