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Product Detailed Parameters
- Description：TRANS NPN 45V 100MA SOT23
- Series：*
- Mfr：onsemi
- Package：Cut Tape (CT),Bulk
- Transistor Type：-
- Current - Collector (Ic) (Max)：-
- Voltage - Collector Emitter Breakdown (Max)：-
- Vce Saturation (Max) @ Ib, Ic：-
- Current - Collector Cutoff (Max)：-
- DC Current Gain (hFE) (Min) @ Ic, Vce：-
- Power - Max：-
- Frequency - Transition：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
Download product information
Overview
The onsemi BC847ALT1 is an NPN silicon general-purpose transistor housed in a SOT-23 (TO-236) surface-mount package. It features a collector-emitter voltage of 45 V and a continuous collector current rating of 100 mA. The device offers a minimum DC current gain of 200 at 2 mA and a transition frequency of 100 MHz. Thermal dissipation reaches 225 mW on FR-5 boards, with an operating junction temperature range from -55°C to +150°C.
Feature Summary
- NPN silicon construction for general-purpose switching and amplification
- High DC current gain selection for low base drive requirements
- Robust electrostatic discharge protection exceeding 4000 V via Human Body Model
- Lead-free packaging compliant with environmental directives
Applications
- General-purpose signal switching circuits
- Low-frequency amplifier stages
- Driver interfaces for logic families
- Biasing networks in analog signal processing
Procurement Notes
Verify the specific suffix 'ALT1' against the manufacturer's ordering guide to confirm the exact hFE binning and tape-and-reel quantity. Ensure the component marking matches the datasheet diagram to distinguish it from other gain variants within the same series. Confirm RoHS compliance status if required by assembly specifications.
Selection Notes
Select this component when a moderate voltage rating of 45 V is sufficient for the application. The high current gain minimizes base current requirements compared to lower-gain alternatives. Consider the SOT-23 footprint constraints and thermal resistance characteristics during PCB layout to ensure reliable operation under maximum load conditions.
Part Context
This part belongs to the BC846/BC847/BC848 family of preferred devices from onsemi. These transistors are designed as complementary or alternative solutions for standard small-signal applications. The BC847 variant specifically targets applications requiring higher breakdown voltage than the BC846 while maintaining similar physical dimensions and pinout configurations.
Replacement Considerations
Direct substitutes include BC847BLT1G and BC847CLT1G, provided their respective gain ranges align with circuit requirements. Verify that replacement parts maintain the same SOT-23 package outline and electrical ratings to ensure mechanical and functional compatibility without redesign.
