DTC123JUAT106

Overview

The DTC123JUAT106 is a single NPN digital transistor manufactured by ROHM Semiconductor, housed in a SOT-323 (UMT3) surface-mount package. It integrates internal bias resistors with typical values of R1 = 2.2 kΩ and R2 = 47 kΩ. Key electrical parameters include a collector-emitter voltage (VCEO) of 50 V, a continuous collector current (Ic) of 100 mA, and a power dissipation (Pd) of 200 mW. The device features a minimum DC current gain (hFE) of 80 at Ic = 10 mA and Vce = 5 V, with a transition frequency (fT) of 250 MHz. It operates within a temperature range of -55°C to +150°C.

Feature Summary

• Integrates NPN bipolar junction transistor with built-in base and emitter bias resistors for simplified circuit design.
• Provides high-speed switching capability with a transition frequency of 250 MHz.
• Offers low saturation voltage characteristics to minimize power loss during conduction.
• Designed for surface-mount assembly in compact SOT-323 packages.

Applications

• General-purpose switching circuits in consumer electronics.
• Driver stages for relays, solenoids, and small motors.
• Logic level shifting and buffer applications in digital systems.
• Interface circuits between microcontrollers and peripheral devices.

Procurement Notes

Verify the specific ordering suffix 'AT106' to confirm the tape-and-reel packaging configuration and quantity per reel. Ensure compliance with RoHS directives if required by the target application. Check for end-of-life or not-recommended-for-new-designs status, as availability may be limited for legacy components. Confirm lead times with authorized distributors due to potential supply chain variations.

Selection Notes

Select this component when a compact NPN digital transistor with a 50V rating and 100mA current capacity is required. The integrated resistor ratio of approximately 21:1 suits applications needing moderate base drive. Compare against alternatives like DTC123JUA or DTC123EUAT106 if different resistor values or package types are needed. Ensure the operating temperature range meets the system's thermal requirements.

Part Context

This part belongs to the ROHM DTC123 series of pre-biased transistors. The 'J' indicates the resistor combination (R1=2.2kΩ, R2=47kΩ), while 'U' denotes the SOT-323 package. The 'A' typically refers to the pin configuration or variant within the UMT3 family. The 'T106' suffix specifies the reel packing method. This series is widely used in portable devices due to its small footprint and ease of use.

Replacement Considerations

DTC123JU3 is a recommended replacement with identical specifications and pinout. DTC123JU3HZGT106 is another compatible option with similar performance. Verify that any substitute maintains the same VCEO, Ic, and resistor values to ensure circuit compatibility.