DTC143ZET1G

Overview

The DTC143ZET1G is an NPN Bias Resistor Transistor (BRT) from onsemi, featuring a monolithic bias network with R1 = 4.7 kΩ and R2 = 47 kΩ. It replaces discrete transistors and external resistors in surface mount applications. Key electrical ratings include a collector-emitter voltage of 50 Vdc, continuous collector current of 100 mAdc, and input forward voltage of 30 Vdc. The device operates within a junction temperature range of -55°C to +150°C. Packaged in the SC-75 (CASE 463) format, it offers simplified circuit design and reduced board space.

Feature Summary

• Integrates a single NPN transistor with a monolithic bias network consisting of series base and base-emitter resistors.
• Eliminates individual discrete components to reduce system cost and board space requirements.
• Supports wave or reflow soldering processes using modified gull-wing leads that absorb thermal stress.

Applications

• General-purpose switching circuits requiring integrated biasing.
• Interface logic level translation between microcontrollers and peripheral devices.
• Driver stages for low-power loads where component count reduction is prioritized.

Procurement Notes

Verify the specific ordering suffix 'ET1G' corresponds to the SC-75 package and 3000-unit tape and reel shipping configuration. Confirm compliance with RoHS standards and Pb-free/Halogen-free material declarations as specified in the official datasheet documentation before finalizing procurement specifications.

Selection Notes

Select this component when a fixed resistor ratio of approximately 0.1 (R1/R2) is required for NPN switching applications. Ensure the operating voltage does not exceed 50 Vdc and the continuous current remains within 100 mA limits. Consider the SC-75 footprint dimensions against available PCB real estate constraints during the layout phase.

Part Context

This part belongs to the DTC143ZE family of digital transistors manufactured by onsemi. It shares functional similarities with MUN2233 and MMUN2233L variants but differs in packaging and specific resistor values. The product line is designed to streamline BJT bias networks for standard signal processing tasks.

Replacement Considerations

Direct substitutes include MUN2233T1G (SC-59 package) and MMUN2233LT1G (SOT-23 package). Verify pinout compatibility and thermal dissipation characteristics when swapping packages, as power handling capabilities vary significantly across different case styles.

FAQ

What are the internal resistor values for the DTC143ZET1G?

The device contains a series base resistor (R1) of 4.7 kΩ and a base-emitter resistor (R2) of 47 kΩ.

Is the DTC143ZET1G qualified for automotive applications?

Yes, parts with the S or NSV prefix are AEC-Q101 qualified and PPAP capable. Standard versions should be verified against specific site control requirements.

What is the maximum collector-emitter voltage rating?

The maximum collector-emitter voltage (VCEO) is rated at 50 Vdc under standard conditions.