MMUN2237LT1G

Overview

The MMUN2237LT1G is a Bias Resistor Transistor (BRT) featuring an NPN transistor integrated with a monolithic bias resistor network. It replaces discrete components to reduce board space and system cost. The device operates with a collector-emitter voltage of 50 Vdc and continuous collector current of 100 mAdc. Internal resistors consist of R1 at 47 kOhms and R2 at 22 kOhms, yielding a typical ratio of 2.1. Packaged in SOT-23, it dissipates 246 mW at 25°C and functions within a junction temperature range of -55°C to +150°C.

Feature Summary

• Integrates a single NPN transistor with two internal resistors to eliminate external bias networks
• Reduces printed circuit board area and component count for simplified design
• Complies with RoHS standards and utilizes lead-free packaging

Applications

• General-purpose switching circuits requiring compact form factors
• Driver stages for logic interfaces replacing discrete resistor networks
• Power management applications utilizing low-voltage control signals

Procurement Notes

Verify the specific part number against official manufacturer documentation to confirm availability status. Check for any recent product discontinuation notices or lifecycle changes directly from onsemi before finalizing procurement plans. Ensure compatibility with existing supply chain requirements.

Selection Notes

Select this component when a compact NPN digital transistor solution is required with a 47 kOhm base resistor. Confirm that the 50 V collector-emitter rating and 100 mA current capacity meet the circuit demands. Verify that the SOT-23 package dimensions fit the designated footprint on the layout.

Part Context

This component belongs to the MUN2237 series of digital transistors manufactured by onsemi. It shares electrical characteristics with other variants in the family but differs in physical packaging. The LT1G suffix specifically denotes the SOT-23 surface-mount configuration.

Replacement Considerations

NSVMMUN2237LT1G serves as a verified alternative within the same series offering identical electrical specifications.