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Product Detailed Parameters
- Description：TRANS PREBIAS NPN 50V 0.1A SMT3
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- Resistors Included：R1 Only
- Transistor Type：NPN - 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)：-
- DC Current Gain (hFE) (Min) @ Ic, Vce：100 @ 1mA, 5V
- Vce Saturation (Max) @ Ib, Ic：150mV @ 250µA, 5mA
- Current - Collector Cutoff (Max)：500nA (ICBO)
- Frequency - Transition：250 MHz
- Power - Max：200 mW
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SMT3
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Overview
The DTC143TKAT146 is a single NPN digital transistor manufactured by ROHM Semiconductor, featuring an integrated base resistor (R1) of 4.7 kOhms. It operates with a collector-emitter voltage (VCEO) of 50 V and supports a continuous collector current of 100 mA. The device exhibits a minimum DC current gain (hFE) of 100 at 1 mA and 5 V, with a transition frequency of 250 MHz. Power dissipation is rated at 200 mW, and the saturation voltage is 150 mV at 250 µA base current and 5 mA collector current. It is housed in an SMT3 (SOT-23-3) surface-mount package.
Feature Summary
- Integrates a 4.7 kOhm bias resistor to simplify circuit design
- Provides high-speed switching capability with 250 MHz transition frequency
- Delivers low saturation voltage for efficient power handling
Applications
- General-purpose logic level shifting and inversion circuits
- Driver stages for small-signal loads in consumer electronics
- Interface circuits between microcontrollers and peripheral devices
Procurement Notes
Verify the specific suffix AT146 to confirm the SMT3 tape-and-reel packaging configuration. Ensure compatibility with RoHS3 standards if required by the target assembly process. Cross-reference the manufacturer's datasheet for precise marking codes and reliability test data before finalizing component selection.
Selection Notes
Select this component when a compact NPN switch with built-in biasing is required. The 4.7 kOhm internal resistor eliminates external components, reducing board space. Verify that the 100 mA current rating and 50 V voltage limit meet the load requirements. Consider the 200 mW power dissipation limit for thermal management in dense layouts.
Part Context
This part belongs to the DTC143 series of pre-biased transistors from ROHM Semiconductor. It shares the same electrical characteristics as the DTC143EKAT146 but differs in packaging and potentially internal resistor configurations. The SMT3 package offers a smaller footprint compared to larger transistor packages, suitable for modern surface-mount applications.
Replacement Considerations
The DTC143EKAT146 is a related variant within the same family. Verify pinout compatibility and exact resistance values before substitution. Other manufacturers offer equivalent NPN digital transistors, but direct pin-to-pin replacements require careful verification of hFE and saturation voltage parameters.
