DDTC144EKA-7-F

Overview

The DDTC144EKA-7-F is an NPN pre-biased small signal surface mount transistor manufactured by Diodes Incorporated. It features built-in biasing resistors where R1 equals R2, with a nominal resistance of 47 kOhms each. The device operates within a supply voltage range up to 50 V and supports a maximum collector current of 100 mA. It provides a minimum DC current gain (hFE) of 68 at 5V and 5mA. The component has a power dissipation rating of 200 mW and a transition frequency of 250 MHz. It is housed in an SC-59 package and complies with RoHS standards.

Feature Summary

• Epitaxial planar die construction for reliable performance
• Integrated biasing resistors with equal values (R1 = R2)
• Lead-free plating with matte tin finish over copper leadframe
• RoHS compliant and constructed with green molding compound

Applications

• General-purpose switching applications
• Driver circuits for low-power loads
• Logic interface level shifting

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging details. Confirm that the component meets required environmental standards such as RoHS compliance. Ensure the supplier provides valid traceability data for the manufacturing date code. Check for any product change notifications related to material composition or assembly processes before finalizing procurement.

Selection Notes

Select this component when a single NPN transistor with integrated base and emitter biasing resistors is required. The 47 kOhm resistor value suits standard logic interface applications. Consider the SC-59 package size for space-constrained designs. Verify that the 200 mW power dissipation rating aligns with the thermal management capabilities of the target PCB layout.

Part Context

This part belongs to the DDTC series of NPN pre-biased transistors from Diodes Incorporated. It is functionally complementary to the DDTA series, which offers PNP configurations. The 'KA' suffix indicates the SC-59 package type, while the 'E' denotes the specific resistor ratio configuration. This series is designed to simplify circuit design by reducing external component count.

Replacement Considerations

Direct substitutes include other DDTC144 variants with identical electrical characteristics but different packages, such as DDTC144ECA-7-F (SOT-23). Cross-reference with DDTA144 equivalents if a PNP polarity is needed instead. Ensure any replacement maintains the same R1/R2 ratio and hFE minimum requirements.