MUN5233T1G

Overview

The MUN5233T1G is an NPN Bias Resistor Transistor (BRT) from onsemi, integrating a single transistor with a monolithic bias network consisting of a series base resistor and a base-emitter resistor. It operates with a maximum collector-emitter voltage of 50 Vdc and continuous collector current of 100 mAdc. The device features a typical input resistance (R1) of 4.7 kOhms and a resistor ratio (R1/R2) of 0.1. Packaged in SC-70/SOT-323 (CASE 419), it supports surface mount installation with a power dissipation of 202 mW at 25°C. The junction temperature range spans from -55°C to +150°C.

Feature Summary

• Integrates a single NPN transistor with a monolithic bias resistor network to replace discrete components.
• Reduces board space and component count by eliminating external bias resistors.
• Simplifies circuit design through built-in biasing functionality.

Applications

• Replacing single devices and external resistor bias networks in digital logic circuits.
• Applications requiring reduced system cost and minimized printed circuit board area.
• General-purpose switching and amplification where simplified biasing is required.

Procurement Notes

Verify the specific ordering suffix and package style against the manufacturer's official documentation before procurement. Confirm that the selected variant meets all environmental compliance requirements, including RoHS and halogen-free standards, for the intended application environment. Ensure compatibility with automated assembly processes regarding tape and reel specifications.

Selection Notes

Select this component when a compact NPN solution with integrated biasing is required. The fixed resistor ratio of 0.1 suits applications needing standard base drive characteristics. Consider the thermal derating curves for high-temperature environments. Verify pinout compatibility if replacing legacy parts from other manufacturers within the same family.

Part Context

This part belongs to the MUN5233 series of digital transistors manufactured by onsemi. It is functionally equivalent to other BRTs in the DTC143Z family, sharing identical electrical characteristics and internal resistor values. The series is designed to streamline the design process for NPN switching applications by consolidating multiple passive and active components into a single surface-mount package.

Replacement Considerations

Direct functional equivalents include DTC143ZE and NSBC143ZF3, which share the same R1=4.7kΩ and R2=47kΩ configuration. When substituting, verify package dimensions and pin assignments, as alternatives may utilize SOT-723 or SC-75 footprints instead of SC-70.