MUN2132T1

Overview

The MUN2132T1 is a PNP Bias Resistor Transistor (BRT) from the MUN2111T1 series, manufactured by onsemi. 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). Both resistors are typically 4.7 kOhms, resulting in a resistor ratio of 1. The device is housed in an SC-59 surface mount package designed for low power applications. Key electrical ratings include a collector-emitter voltage (VCEO) of 50 Vdc, a continuous collector current (IC) of 100 mAdc, and a total device dissipation (PD) of 230 mW at 25°C, extending to 338 mW on larger pads. The junction temperature range is -55°C to +150°C.

Feature Summary

• Integrates a PNP transistor with a monolithic bias network containing a series base resistor and a base-emitter resistor to replace discrete components.
• Designed to simplify circuit design, reduce board space, and lower component count in surface mount applications.
• Features modified gull-winged leads in the SC-59 package to absorb thermal stress during wave or reflow soldering.

Applications

• General-purpose digital switching circuits requiring integrated biasing.
• Low power surface mount applications where board space is limited.
• Circuits replacing individual transistors and external resistor networks.

Procurement Notes

Verify the specific part number suffix against official manufacturer documentation to confirm availability and exact specifications. The MUN2132T1 is listed as obsolete in some distributor records; check for active equivalents like the MUN2132T1G if long-term supply is required. Confirm moisture sensitivity level and RoHS compliance status directly from the latest datasheet revision before procurement.

Selection Notes

Select this component when a PNP digital transistor with equal base and emitter bias resistors (4.7 kOhms each) is needed. Ensure the application operates within the 50 V collector-emitter voltage limit and 100 mA current rating. Consider the SC-59 package dimensions and thermal dissipation characteristics relative to the PCB pad size, as power handling varies between minimum and maximum footprint configurations.

Part Context

The MUN2132T1 belongs to the MUN2111T1 series of Bias Resistor Transistors. This series is designed to consolidate discrete transistor and resistor functions into a single surface-mount device. The 'MUN' prefix indicates a PNP configuration, while the '2132' designation specifies the internal resistor values. These devices are intended to streamline design processes by reducing the number of components required for biasing networks.

Replacement Considerations

The MUN2132T1 is marked as obsolete. The MUN2132T1G is a recommended alternative from onsemi using the same SC-59 package and electrical characteristics. Verify pinout compatibility and resistor values when substituting.