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Product Detailed Parameters
- Description：TRANS PNP 45V 0.1A SOT23-3
- Series：-
- Mfr：onsemi
- 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：300 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 BC857ALT1G is a PNP silicon general-purpose transistor manufactured by onsemi. It operates within the BC856ALT1G series and utilizes an SOT-23 (TO-236) plastic surface-mount package. The device features a collector-emitter voltage rating of -45 V, a continuous collector current of -100 mA, and a peak collector current of -200 mA. Thermal characteristics include a total device dissipation of 225 mW on an FR-5 board at 25°C ambient temperature. The component is Pb-Free, Halogen Free/BFR Free, and RoHS compliant.
Feature Summary
- AEC-Q101 qualified for automotive applications requiring unique site and control change requirements
- PPAP capable manufacturing process
- Pb-Free, Halogen Free, and BFR Free construction
Applications
- General purpose switching
- Amplifier applications
- Automotive electronics systems
Procurement Notes
Verify the specific ordering suffix to confirm the prefix designation, as 'S' or 'NSV' prefixes indicate AEC-Q101 qualification and PPAP capability distinct from standard commercial versions. Confirm the package style pinout configuration matches the circuit design requirements before procurement. Ensure compliance with RoHS directives if required by the final assembly specifications.
Selection Notes
Select this component when a PNP small-signal transistor with a -45 V collector-emitter voltage rating is required. The BC857 variant offers a DC current gain range suitable for general amplification tasks. Consider the SOT-23 package dimensions for PCB layout constraints. Verify thermal management needs against the specified junction-to-ambient resistance values for the intended operating environment.
Part Context
This part belongs to the BC856ALT1G series, which includes complementary NPN devices such as the BC846ALT1G. The series provides standardized general-purpose transistors for low-current applications. The BC857 specifically denotes the -45 V breakdown voltage variant within the family, distinguishing it from the -65 V BC856 and -30 V BC858 models.
Replacement Considerations
Direct substitutes include other manufacturers' BC857 variants in SOT-23 packages, such as those from Nexperia or Diodes Incorporated. Verify that replacement parts meet the same -45 V VCEO and -100 mA IC ratings. Check for identical pinout configurations to ensure compatibility without circuit modification.
