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Product Detailed Parameters
- Description：RF TRANS NPN 20V 1.5GHZ EMT3
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- Transistor Type：NPN
- Voltage - Collector Emitter Breakdown (Max)：20V
- Frequency - Transition：1.5GHz
- Noise Figure (dB Typ @ f)：4.5dB @ 200MHz
- Gain：-
- Power - Max：150mW
- DC Current Gain (hFE) (Min) @ Ic, Vce：82 @ 10mA, 10V
- Current - Collector (Ic) (Max)：50mA
- Operating Temperature：150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SC-75, SOT-416
- Supplier Device Package：EMT3
- Grade：-
- Qualification：-
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Overview
The 2SC4725TLP is a high-frequency NPN silicon bipolar junction transistor manufactured by ROHM Semiconductor. It operates with a collector-emitter voltage of 20V and a maximum collector current of 50mA, housed in an EMT3 (SOT-416) surface-mount package. The device features a typical transition frequency of 1.5GHz and a low collector-base time constant of 6ps. Electrical characteristics include a DC current gain ranging from 82 to 180 at IC=1mA, output capacitance of 0.9pF, and a noise figure of 4.5dB at 200MHz.
Feature Summary
- High transition frequency for UHF band amplification
- Small collector-base time constant enabling high gain
- Low noise figure suitable for sensitive signal processing
Applications
- UHF band amplifier circuits
- High-frequency small signal amplification
- General-purpose audio visual equipment
- Communication devices
Procurement Notes
Verify the specific ordering suffix against official documentation to confirm packaging details. Confirm RoHS compliance status directly with the manufacturer or authorized distributors before procurement. Ensure design margins account for absolute maximum ratings under varying thermal conditions.
Selection Notes
Select this component for applications requiring high-speed switching or amplification in the UHF range. Evaluate the trade-off between the 20V breakdown voltage and the 50mA current limit against circuit requirements. Consider the SOT-416 footprint constraints during PCB layout planning.
Part Context
This part belongs to a family of high-frequency transistors including the 2SC5661, 2SC4082, and 2SC3837K. While sharing similar electrical performance profiles, each variant utilizes a distinct package type such as VMT3, UMT3, or SMT3. The 2SC4725 specifically utilizes the EMT3 package configuration.
Replacement Considerations
Direct substitutes within the same package are not explicitly listed in the provided datasheet. Cross-reference the 2SC5661, 2SC4082, or 2SC3837K only if package compatibility adjustments are permissible in the target design.
FAQ
What is the typical transition frequency of the 2SC4725?
The typical transition frequency (fT) is 1.5GHz.
What is the maximum collector power dissipation?
The maximum collector power dissipation is 0.15W at an ambient temperature of 25°C.
What is the minimum DC current transfer ratio (hFE)?
The minimum hFE is 82 when measured at IC = 1mA and VCE = 10V.
