MUN2232T1

Overview

The onsemi MUN2232T1 is an NPN silicon Bias Resistor Transistor (BRT) 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 and a base-emitter resistor. The device features a collector-emitter voltage rating of 50 Vdc, a continuous collector current of 100 mAdc, and a minimum DC current gain (hFE) of 15 at VCE = 10 V and IC = 5.0 mA. Typical internal resistance values are R1 = 4.7 kOhms and R2 = 4.7 kOhms. Total power dissipation reaches 338 mW on a 1.0 x 1.0 inch FR-4 pad, with an operating temperature range from -55°C to +150°C.

Feature Summary

• Integrates a single NPN transistor with a monolithic bias network containing a series base resistor and a base-emitter resistor.
• Designed to replace individual discrete devices and external resistor bias networks to reduce system cost and board space.
• Housed in the SC-59 package with modified gull-wing leads that absorb thermal stress during wave or reflow soldering.

Applications

• Level shifting circuits connecting 12V or 24V logic to lower voltage systems
• Open collector inverter configurations for signal inversion
• Unregulated current source implementations

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and environmental compliance. Confirm the manufacturer's part number matches the required electrical characteristics before procurement. Ensure the component meets the intended application's thermal and voltage requirements based on the datasheet specifications.

Selection Notes

Select this component when a compact solution is needed to drive NPN switching applications without external biasing resistors. Verify that the integrated 4.7 kOhm input resistance aligns with the driving circuit's output capabilities. Ensure the 50 V collector-emitter voltage rating exceeds the maximum expected load voltage in the target design.

Part Context

This component belongs to the MUN2211T1 Series of preferred digital transistors manufactured by onsemi. The series provides various combinations of integrated bias resistors to suit different logic interface requirements while maintaining a standardized SC-59 footprint for consistent board layout practices.

Replacement Considerations

MUN2232T1G serves as the lead-free equivalent within the same series. Cross-referencing with other manufacturers requires verifying identical pinout assignments, voltage ratings, and internal resistance values to ensure functional compatibility.