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Product Detailed Parameters
- Description：TRANS NPN 65V 0.1A SOT-23
- Series：SOT-23
- Mfr：Fairchild Semiconductor
- Package：Bulk
- Transistor Type：NPN
- Current - Collector (Ic) (Max)：100 mA
- Voltage - Collector Emitter Breakdown (Max)：65 V
- Vce Saturation (Max) @ Ib, Ic：500mV @ 5mA, 100mA
- Current - Collector Cutoff (Max)：100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce：110 @ 2mA, 5V
- Power - Max：200 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
- Grade：-
- Qualification：-
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Overview
The Fairchild Semiconductor BC846A is a general-purpose NPN silicon small-signal bipolar junction transistor (BJT). It features a maximum collector current of 100 mA and a collector-emitter breakdown voltage of 65 V. The device offers a high DC current gain, with the 'A' suffix typically denoting a specific gain bin (e.g., hFE 200-450), though exact ranges depend on the specific datasheet revision. It operates within a temperature range of -55°C to +150°C and is available in surface-mount packages such as SOT-23.
Feature Summary
- General-purpose NPN silicon construction for standard switching and amplification tasks
- High DC current gain characteristics suitable for low-level signal processing
- Robust thermal performance with a maximum junction temperature of 150°C
- Compact surface-mount packaging options for automated assembly
Applications
- General-purpose amplifier circuits
- Switching applications in consumer electronics
- Driver stages for low-power loads
- Audio pre-amplifier input stages
Procurement Notes
Verify the specific manufacturer source, as Fairchild Semiconductor's discrete component portfolio was acquired by ON Semiconductor. Ensure the part number corresponds to legacy Fairchild stock or current ON Semiconductor equivalents. Confirm RoHS compliance status and check for any PCN (Product Change Notification) regarding package or material changes associated with the acquisition transition.
Selection Notes
Select this component for designs requiring a standard NPN transistor with moderate voltage ratings and high gain. Compare the specific hFE binning requirements against the application's base drive capabilities. Consider alternative packages like SOT-23 or SC-70 based on PCB space constraints. Verify that the 100 mA continuous collector current meets the load requirements without exceeding thermal limits.
Part Context
The BC846 series is a widely used family of NPN transistors known for their versatility in low-power applications. The BC846A variant specifically targets applications requiring higher current gain compared to lower-bin variants. This component serves as a fundamental building block in analog and digital logic interfaces, often replacing older through-hole devices in modern compact electronic designs.
Replacement Considerations
Legacy Fairchild parts may now be sourced under ON Semiconductor branding. Check for direct pin-compatible replacements from other manufacturers such as Nexperia or Diotec if supply chain adjustments are necessary.
