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Product Detailed Parameters
- Description：TRANS PREBIAS PNP 50V TO92-3
- Series：-
- Mfr：Fairchild Semiconductor
- Package：Bulk
- Resistors Included：R1 and R2
- Transistor Type：PNP - Pre-Biased
- Current - Collector (Ic) (Max)：100 mA
- Voltage - Collector Emitter Breakdown (Max)：50 V
- Resistor - Base (R1)：4.7 kOhms
- Resistor - Emitter Base (R2)：47 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce：68 @ 5mA, 5V
- Vce Saturation (Max) @ Ib, Ic：300mV @ 500µA, 10mA
- Current - Collector Cutoff (Max)：100nA (ICBO)
- Frequency - Transition：200 MHz
- Power - Max：300 mW
- Grade：-
- Qualification：-
- Mounting Type：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA)
- Supplier Device Package：TO-92-3
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Overview
The FJN4314RBU is a pre-biased NPN bipolar transistor manufactured by Fairchild Semiconductor. It integrates bias resistors within a single TO-92 package to simplify circuit design. The device supports a maximum collector-emitter voltage of 50 V and a continuous collector current of 100 mA. Internal resistor values are typically 4.7 kΩ for the base resistor and 10 kΩ for the emitter resistor, establishing a built-in bias ratio of approximately 2.13. This configuration reduces component count and board space in switching and interface applications.
Feature Summary
- Integrated dual bias resistors eliminate external components
- Single NPN epitaxial silicon transistor structure
- TO-92 through-hole packaging for standard mounting
Applications
- Switching circuits
- Inverter applications
- Interface circuits
- Driver circuits
Procurement Notes
Verify the specific internal resistor ratio during procurement, as suffixes may indicate variations in resistance values or tolerance levels. Confirm RoHS compliance status with the supplier, as manufacturing sources may vary. Ensure the TO-92 package dimensions match the target PCB footprint requirements before finalizing orders.
Selection Notes
Select this component when a compact NPN switching solution with fixed biasing is required. The integrated 4.7kΩ/10kΩ resistor network suits applications needing stable turn-on characteristics without external bias networks. Compare against complementary PNP models if push-pull configurations are necessary for the specific load drive requirements.
Part Context
This part belongs to Fairchild's family of Bias Resistor Built-In (BRBI) transistors. These devices combine an NPN transistor with two resistors to form a complete biasing network. The series is designed to replace discrete transistor-resistor combinations, offering improved consistency and reduced assembly time in consumer and industrial electronics.
Replacement Considerations
The FJN4305RBU is a documented similar device within the same manufacturer portfolio, featuring identical TO-92 packaging and comparable 50V/100mA ratings. Verify the internal resistor ratios between these parts to ensure functional equivalence in existing designs.
