MUN2233T1

Overview

The MUN2233T1 is an NPN Bias Resistor Transistor (BRT) from the MUN2211T1 series, manufactured by onsemi. It integrates a single transistor with a monolithic bias network consisting of a series base resistor (R1 = 4.7 kΩ) and a base-emitter resistor (R2 = 47 kΩ). The device is housed in an SC-59 package designed for low power surface mount applications. Key electrical ratings include a collector-emitter voltage (VCEO) of 50 Vdc and a continuous collector current (IC) of 100 mAdc at 25°C. The operating temperature range spans from -55°C to +150°C.

Feature Summary

• Integrates a single NPN transistor with a monolithic bias network containing two resistors to replace individual discrete components.
• Designed to simplify circuit design while reducing board space and component count.
• Features modified gull-winged leads in the SC-59 package to absorb thermal stress during wave or reflow soldering.

Applications

• Level shifting between 12 or 24 volt circuits and logic levels
• Open collector inverter configurations for signal inversion
• Unregulated current source implementations

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm lead-free status and shipping format. Confirm that the SC-59 package dimensions align with the target PCB footprint requirements. Ensure the selected variant matches the required R1 and R2 resistance values for the intended bias network application.

Selection Notes

Select this component when a compact solution is needed to drive an NPN switch without external biasing resistors. Verify that the 4.7 kΩ input resistance and 47 kΩ emitter resistance meet the specific circuit impedance requirements. Ensure the 50 V collector-emitter voltage rating provides sufficient margin for the maximum operating voltage in the target application.

Part Context

This part belongs to the MUN2211T1 series of NPN Silicon Surface Mount Transistors with Monolithic Bias Resistor Networks. The series includes various combinations of internal resistors to suit different biasing needs. The manufacturer identifies these as preferred devices recommended for future use and best overall value within their discrete semiconductor portfolio.

Replacement Considerations

Direct substitutes within the same series include MUN2233T1G, which denotes a lead-free package variant. Other compatible parts in the series share the same SC-59 package and general electrical characteristics but differ in internal resistor values.