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Product Detailed Parameters
- Description：TRANS PREBIAS NPN 200MW SOT23-3
- 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 DDTC144WCA-7 is an NPN pre-biased small signal surface mount transistor manufactured by Diodes Incorporated. It features epitaxial planar die construction and includes built-in biasing resistors with nominal values of R1 = 47 kΩ and R2 = 22 kΩ. The device operates within a supply voltage range up to 50 V and supports a continuous collector current of 100 mA. It provides a minimum DC current gain (hFE) of 56 at 5 mA and achieves a transition frequency of 250 MHz. Power dissipation is rated at 200 mW, with an operating temperature range spanning from -55°C to +150°C. The component is housed in a compact SOT-23 package.
Feature Summary
- Integrates two internal biasing resistors (R1 ≠ R2) to reduce external component count and PCB footprint.
- Constructed using epitaxial planar die technology for reliable performance.
- Compliant with AEC-Q101 standards for high reliability applications.
Applications
- General-purpose switching circuits requiring integrated base drive.
- Driver stages for relays, solenoids, or LED loads.
- Logic level translation between microcontrollers and peripheral devices.
Procurement Notes
Verify the specific ordering suffix against official manufacturer documentation to confirm packaging details and compliance status. Confirm that the requested variant matches the required resistor ratio and electrical characteristics defined in the datasheet. Ensure compatibility with automated assembly processes by checking tape and reel specifications prior to procurement.
Selection Notes
Select this component when a single NPN transistor with unequal biasing resistors is required for space-constrained designs. Verify that the 47 kΩ input resistance and 22 kΩ emitter resistance align with the target logic interface voltages. Consider the 200 mW power dissipation limit and thermal resistance when designing for high ambient temperatures or dense board layouts.
Part Context
This part belongs to the DDTC144 series of pre-biased transistors from Diodes Incorporated. It shares the same physical package and general electrical profile as other members of the DDTC family but is distinguished by its specific internal resistor network configuration. The 'CA' suffix indicates the inclusion of built-in resistors, while the 'W' designation specifies the 47k/22k ratio.
Replacement Considerations
Direct replacements include other Diodes Incorporated parts with identical resistor ratios, such as DDTC144WCAQ-7-F for automotive-grade requirements. Cross-manufacturer equivalents must be verified for matching hFE, VCEO, and internal resistance values to ensure circuit functionality remains unchanged.
