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Product Detailed Parameters
- Description：TRANS PREBIAS NPN 200MW SOT323
- Series：*
- Mfr：Diodes Incorporated
- Package：Cut Tape (CT)
- Resistors Included：-
- Transistor Type：-
- Current - Collector (Ic) (Max)：-
- Voltage - Collector Emitter Breakdown (Max)：-
- Resistor - Base (R1)：-
- Resistor - Emitter Base (R2)：-
- DC Current Gain (hFE) (Min) @ Ic, Vce：-
- Vce Saturation (Max) @ Ib, Ic：-
- Current - Collector Cutoff (Max)：-
- Frequency - Transition：-
- Power - Max：-
- Grade：-
- Qualification：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
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Overview
The DDTC143FUA-7-F is a 50V NPN pre-biased transistor in an SOT323 package. It integrates built-in biasing resistors with nominal values of R1=4.7kΩ and R2=22kΩ. The device supports a maximum collector current of 100mA and dissipates up to 200mW. Key electrical characteristics include a DC current gain (hFE) of 68 at VOUT=5V, IOUT=10mA, and a typical input voltage of 1.3V when driving 3mA output. The junction-to-ambient thermal resistance is 625°C/W, operating within a temperature range of -55°C to +150°C.
Feature Summary
- Epitaxial planar die construction for reliable performance
- Integrated biasing resistors simplify circuit design
- Surface mount package optimized for automated assembly
Applications
- General-purpose switching applications
- Driver circuits for low-power loads
- Logic interface buffering
Procurement Notes
Verify the complete part number suffix against official documentation to ensure correct packaging and compliance status. Confirm that the specific ordering code matches the required reel size and tape width specifications before finalizing procurement orders.
Selection Notes
Select this component when a compact NPN solution with fixed internal biasing is required. Ensure the 4.7kΩ base resistor and 22kΩ emitter resistor values align with the target drive current and logic level requirements of the application circuit.
Part Context
This component belongs to the DDTC series of pre-biased transistors from Diodes Incorporated. These devices combine an NPN transistor with internal resistors to reduce board space and assembly steps compared to discrete resistor-transistor combinations.
Replacement Considerations
Direct replacements must match the SOT323 package, 50V rating, 100mA current limit, and identical resistor ratios (R1=4.7kΩ, R2=22kΩ). Verify pinout compatibility and thermal characteristics before substitution.
FAQ
What are the nominal values of the built-in resistors?
The nominal resistor values are R1 = 4.7kΩ and R2 = 22kΩ.
What is the maximum power dissipation?
The maximum power dissipation is 200mW at an ambient temperature of +25°C.
What is the minimum DC current gain?
The minimum DC current gain (hFE) is 68, measured at VOUT = 5V and IOUT = 10mA.
