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Product Detailed Parameters
- Description：TRANS NPN 30V 0.1A SOT-23-3
- Series：-
- Mfr：Fairchild Semiconductor
- Package：Bulk
- Transistor Type：NPN
- Current - Collector (Ic) (Max)：100 mA
- Voltage - Collector Emitter Breakdown (Max)：30 V
- Vce Saturation (Max) @ Ib, Ic：600mV @ 5mA, 100mA
- Current - Collector Cutoff (Max)：15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce：420 @ 2mA, 5V
- Power - Max：310 mW
- Frequency - Transition：300MHz
- Operating Temperature：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 BC849CMTF is a small signal NPN epitaxial silicon transistor manufactured by Fairchild Semiconductor. It is housed in a lead-free SOT-23 surface-mount package with three terminals. The device supports a maximum collector current of 0.1 A and a collector-emitter voltage rating of 45 V. It features a minimum DC current gain (hFE) of 200, ensuring high amplification capability for general-purpose applications.
Feature Summary
- NPN epitaxial silicon planar design
- Lead-free construction compliant with EU RoHS directives
- High DC current gain for amplifier applications
Applications
- General purpose amplifier circuits
- Switching applications
- Signal processing stages
Procurement Notes
Verify the manufacturer designation on the component marking to confirm Fairchild Semiconductor origin. Ensure the part number suffix matches the specific tape-and-reel configuration required for automated assembly processes. Confirm lead-free status and RoHS compliance documentation aligns with project regulatory requirements before finalizing procurement orders.
Selection Notes
Select this component when a low-voltage NPN transistor with moderate current handling is required. The SOT-23 package offers space efficiency for compact designs. Consider the minimum hFE specification to ensure adequate gain margins in amplifier topologies. Verify thermal dissipation limits relative to the expected operating conditions within the target circuit environment.
Part Context
This component belongs to the BC849 series of general-purpose NPN transistors. It shares the same physical footprint and basic electrical ratings as other variants in the family, such as BC847 and BC848, but differs in its specific DC current gain classification. The series is widely used in consumer electronics and industrial control systems requiring reliable switching or amplification functions.
Replacement Considerations
Equivalent parts include the BC849CW from Panasonic and the BC849DWT1G from ON Semiconductor. These alternatives share identical pinouts and core specifications. Verify that the substitute meets the same lead-free and RoHS standards required for the original assembly process.
