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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 and R2
- 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)：47 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce：80 @ 10mA, 5V
- Vce Saturation (Max) @ Ib, Ic：300mV @ 250µA, 5mA
- Current - Collector Cutoff (Max)：500nA
- 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 DTC143ZKAT146 is a single NPN digital transistor manufactured by ROHM Semiconductor, designed for surface mount applications in the SOT-346-3 package. It features built-in bias resistors with a typical input resistance of 4.7 kOhms and a resistor ratio of 2.1. The device supports a collector continuous current of 100 mA and a maximum operating frequency of 250 MHz. Key electrical parameters include a DC collector/base gain (hfe) minimum of 30 at 10 mA and 5 V, a power dissipation of 200 mW, and a maximum operating temperature of +150 C. The emitter-base voltage (VEBO) is specified at 3 V.
Feature Summary
- Integrates built-in bias resistors to simplify digital circuit design
- Optimized for high-speed switching with a maximum operating frequency of 250 MHz
- Designed for compact surface mount installation in small packages
Applications
- Inverter circuits
- Interface logic drivers
- General-purpose driver applications
Procurement Notes
Verify the specific suffix 'AT146' to confirm the reel packaging configuration and marking code 'E23'. Ensure the SOT-346-3 footprint matches the PCB layout requirements. Cross-reference the datasheet for thermal derating curves relative to ambient temperature. Confirm RoHS compliance status through official manufacturer documentation before finalizing component selection.
Selection Notes
Select this component when a pre-biased NPN solution is required to reduce external resistor count. The 4.7 kOhm input resistance suits standard logic levels. Consider the 200 mW power dissipation limit for thermal management. The SOT-346-3 package offers space efficiency compared to larger discrete transistor arrangements.
Part Context
This part belongs to the DTC143EK series of digital transistors from ROHM Semiconductor. These devices combine an NPN bipolar transistor with internal biasing networks. The series is engineered for cost-effective integration in consumer electronics and industrial control systems where space and bill-of-materials reduction are critical priorities.
Replacement Considerations
Direct substitutes within the same family include DTC143EKA variants with compatible pinouts. Verify that alternative parts maintain the 4.7 kOhm input resistance and NPN polarity. Check package compatibility between SOT-346-3 and potential replacements.
