MUN2211T1

Overview

The MUN2211T1 is an NPN Silicon Bias Resistor Transistor (BRT) from onsemi, housed in the SC-59 surface-mount package. It integrates a single transistor with a monolithic bias network consisting of two resistors: a series base resistor (R1) and a base-emitter resistor (R2). The device features a collector-emitter voltage (VCEO) of 50 Vdc and a continuous collector current (IC) of 100 mAdc. Typical internal resistance values are 10 kOhms for both R1 and R2. Total device power dissipation is rated at 230 mW at 25°C on a minimum FR-4 pad, with a junction-to-ambient thermal resistance of 540 °C/W under these conditions.

Feature Summary

• Integrates a single NPN transistor with a monolithic bias network to replace discrete components
• Designed for low power surface mount applications using the SC-59 package
• Moisture Sensitivity Level 1 with ESD protection rated Class 1 Human Body Model

Applications

• Level shifting between 12 or 24 Volt circuits and logic levels
• Open collector inverter configurations
• Unregulated current source implementations

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm shipping quantities and lead times. Confirm RoHS compliance status if required by the target assembly process. Ensure the SC-59 footprint matches the design layout before finalizing procurement orders.

Selection Notes

Select this component when circuit design requires simplification through reduced board space and component count. The integrated bias network eliminates external resistors, streamlining the schematic. Verify that the 10 kOhm typical input resistance aligns with the driving logic requirements and desired switching thresholds.

Part Context

This part belongs to the MUN2211T1 Series of preferred devices designed to replace individual transistors and their external bias networks. The series includes variants with different resistor ratios and values, all sharing the same NPN silicon structure and SC-59 packaging format for consistent manufacturing integration.

Replacement Considerations

MUN2211T1G serves as the lead-free equivalent within the same series.