MMUN2211LT1G

Overview

The MMUN2211LT1G is a single NPN digital transistor (BRT) manufactured by onsemi, housed in an SOT-23-3 surface-mount package. It integrates a built-in bias resistor network with a typical ratio of 1, featuring a base resistor (R1) and emitter resistor (R2) both typically valued at 10 kOhms. The device supports a maximum collector-emitter voltage (VCEO) of 50 V and a continuous collector current of 100 mA. Power dissipation is rated at 246 mW, with an operating temperature range spanning from -55°C to +150°C. Minimum DC current gain (hFE) specifications are listed as 35 and 60 under defined test conditions.

Feature Summary

• Integrates dual bias resistors with a fixed 1:1 ratio to simplify circuit design and reduce component count.
• Provides high-density switching capability within a compact SOT-23-3 footprint for space-constrained applications.
• Engineered for robust operation across extended industrial temperature ranges up to 150°C.

Applications

• General-purpose switching circuits requiring pre-biased logic interfaces.
• Driver stages for low-current loads in consumer electronics.
• Level shifting and buffer applications in digital logic systems.

Procurement Notes

Verify the specific datasheet revision and electrical characteristics against the manufacturer's official documentation prior to integration. Confirm that the SOT-23-3 package dimensions and pinout align with the target PCB layout requirements. Ensure compliance with relevant environmental directives such as RoHS standards applicable to the manufacturing region.

Selection Notes

Select this component when a single NPN switch with integrated biasing is required. The 10 kOhm resistor values offer a balance between drive current and power consumption. Consider the 50 V voltage rating and 100 mA current limit to ensure adequate headroom for the intended load. Verify thermal management capabilities given the 246 mW power dissipation limit in the small outline package.

Part Context

This part belongs to the MMUN2211L series of digital transistors from onsemi. It serves as the NPN variant within a family that includes complementary PNP types like the MMUN2112LT1G. The 'LT1G' suffix indicates the specific tape-and-reel packaging and lead-free composition standard used by the manufacturer for this product line.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult the manufacturer's official cross-reference guides or equivalent digital transistor families for verified alternatives.