DDTD122JC-7-F

Overview

The DDTD122JC-7-F is an 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 = 4.7 kΩ. The device operates within a supply voltage range up to 50 V and supports a continuous collector current of 500 mA. Electrical characteristics include a DC current gain (hFE) minimum of 47, a collector-emitter saturation voltage of 0.3 V at 50 mA, and a gain-bandwidth product of 200 MHz. Thermal performance specifies a power dissipation of 250 mW and a junction-to-ambient thermal resistance of 500 °C/W. The component is housed in an SOT23 package.

Feature Summary

• Integrated dual biasing resistors simplify circuit design and reduce PCB footprint.
• Epitaxial planar die construction ensures stable switching performance.
• Totally lead-free and fully RoHS compliant for environmental safety.

Applications

• General-purpose switching applications
• Driver circuits for low-power loads
• Logic level translation interfaces

Procurement Notes

Verify the obsolete status of this specific part number before initiating any procurement activities. Confirm availability through authorized distributors or secondary market channels. Ensure that any replacement components meet the required electrical specifications and physical dimensions to maintain compatibility with existing designs.

Selection Notes

Select this component when a compact NPN solution with integrated base and emitter resistors is required. Verify that the 0.22 kΩ input resistor value aligns with the driving source impedance. Check that the 500 mA current rating and 50 V voltage limits exceed the maximum operational requirements of the target application.

Part Context

This component belongs to the DDTD series of pre-biased transistors from Diodes Incorporated. It serves as the NPN counterpart to the DDTB series PNP devices. The 'JC' suffix indicates specific internal resistor ratios compared to other variants in the family. It is designed for high-volume surface-mount assembly processes.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Engineering teams must evaluate alternative pre-biased transistors based on matching pin configurations, electrical ratings, and package dimensions.