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Product Detailed Parameters
- Description：TRANS NPN 20V 0.3A SPT
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR)
- Transistor Type：NPN
- Current - Collector (Ic) (Max)：300 mA
- Voltage - Collector Emitter Breakdown (Max)：20 V
- Vce Saturation (Max) @ Ib, Ic：100mV @ 3mA, 30mA
- Current - Collector Cutoff (Max)：100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce：820 @ 4ma, 2V
- Power - Max：300 mW
- Frequency - Transition：35MHz
- Operating Temperature：150°C (TJ)
- Mounting Type：Through Hole
- Package / Case：SC-72 Formed Leads
- Supplier Device Package：SPT
- Grade：-
- Qualification：-
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Overview
The 2SD2705STP is an NPN silicon epitaxial planar transistor from the 2SD2704K series, designed for muting applications. It features a collector-emitter voltage of 20V and a continuous collector current of 300mA. The device offers a high DC current gain (hFE) ranging from 820 to 2700 at VCE=2V and IC=4mA. Key electrical characteristics include a minimum emitter-base breakdown voltage of 25V and a typical output on-resistance (Ron) of 0.7Ω. Packaged in the SMT3 (SC-59) surface-mount format with taping specifications.
Feature Summary
- High DC current gain suitable for sensitive switching applications
- High emitter-base voltage rating for robust protection
- Low output on-resistance for efficient signal routing
Applications
- Muting circuits in audio equipment
- Signal switching in consumer electronics
- General-purpose amplification in low-voltage systems
Procurement Notes
Verify the specific ordering suffix against the official ROHM datasheet to confirm package type and packaging quantity. Ensure the component meets RoHS compliance requirements for your target market. Cross-reference the manufacturer part number with authorized distributor listings to confirm availability and authenticity before finalizing procurement plans.
Selection Notes
Select this component when designing circuits requiring high gain and low on-resistance within a 20V collector-emitter limit. Consider the SMT3 package dimensions for PCB layout constraints. Evaluate the thermal dissipation capabilities relative to the expected operating temperature range and ambient conditions to ensure reliable performance under load.
Part Context
This transistor belongs to the 2SD2704K family, which includes variants like the 2SD2707T2LV. These components are engineered for general-use electronic equipment such as audio visual devices and office automation tools. They are not intended for radiation-tolerant or safety-critical applications involving direct threats to human life.
Replacement Considerations
Consult the official datasheet for confirmed substitute part numbers. Verify that any replacement maintains identical pinout configurations, voltage ratings, and current handling capabilities to ensure circuit compatibility without redesign.
