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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 DDTC122LU-7-F is an obsolete NPN pre-biased surface mount transistor manufactured by Diodes Incorporated. It features built-in biasing resistors with nominal values of R1 = 0.22 kΩ and R2 = 10 kΩ. The device operates within a supply voltage range up to 50 V and supports a continuous collector current of 100 mA. Power dissipation is rated at 200 mW, with a thermal resistance (RθJA) of 625 °C/W. The component utilizes SOT-323 packaging and functions across an operating temperature range of -55°C to +150°C.
Feature Summary
- Epitaxial planar die construction for reliable performance
- Integrated biasing resistors simplify circuit design
- Totally lead-free and fully RoHS compliant
- Halogen and antimony free "Green" device
Applications
- General-purpose switching applications
- Driver circuits for low-power loads
- Logic level translation interfaces
Procurement Notes
This component is officially marked as obsolete and discontinued by the manufacturer. Verification of availability requires direct contact with Diodes Incorporated or authorized representatives. Standard distribution channels do not list active stock. Engineering teams should initiate replacement strategies immediately due to the confirmed end-of-life status.
Selection Notes
Select this part only if legacy compatibility is strictly required. Verify that the 0.22 kΩ base resistor and 10 kΩ emitter resistor match the target circuit requirements. Confirm that the SOT-323 package dimensions fit the PCB layout constraints. Ensure the 100 mA current rating satisfies the load demands without exceeding the 200 mW power dissipation limit under worst-case thermal conditions.
Part Context
The DDTC122LU-7-F belongs to the DDTC series of NPN pre-biased transistors from Diodes Incorporated. It is functionally complementary to the DDTA series PNP types. The specific suffix 'LU' denotes the 0.22 kΩ / 10 kΩ resistor configuration in the SOT-323 package. This series is designed to replace discrete resistor-transistor networks in space-constrained designs.
Replacement Considerations
Public datasheets confirm the DDTA122LU-7-F as the complementary PNP type. No other direct substitutes are explicitly listed in the provided documentation. Engineers must evaluate alternative pre-biased transistors from other manufacturers or redesign using discrete components.
