MMBTRC103SS

Overview

The MMBTRC103SS is a single NPN digital transistor manufactured by Diotec Semiconductor, housed in an SOT-23 (TO-236) surface-mount package. It integrates bias resistors to simplify circuit design and reduce component count. The device features a maximum collector-emitter voltage of 50 V and a continuous collector current of 100 mA, with a total power dissipation rating of 200 mW at 25°C ambient temperature on a PCB with 3 mm² copper pads per terminal. The junction temperature range spans from -55°C to +150°C. Electrical characteristics include a typical DC current gain of 70 at 5 V and 10 mA, a transition frequency of 200 MHz, and built-in base and emitter resistors of 22 kΩ each.

Feature Summary

• Integrates dual bias resistors to minimize board space and simplify drive circuitry
• Designed for cost-effective digital switching and signal processing applications
• Compliant with RoHS directives and REACH regulations without exemptions

Applications

• Digital control circuits
• Switching applications
• Signal processing interfaces

Procurement Notes

Verify the specific suffix configuration when ordering, as standard versions differ from automotive-grade variants. Confirm that the intended application falls within commercial or industrial grade reliability standards. Ensure thermal management aligns with the specified power dissipation limits on appropriate PCB copper pad areas. Check for AEC-Q101 compliance requirements if the deployment involves automotive environments.

Selection Notes

Select this component when a compact NPN switch with integrated biasing is required. The 22 kΩ resistor combination suits moderate drive currents. Verify input voltage ranges against the datasheet specifications to ensure proper saturation and cutoff behavior. Consider the 200 MHz transition frequency for high-speed digital signals compared to slower discrete alternatives.

Part Context

This part belongs to the MMBTRC10x series of surface mount digital transistors. The series offers various resistor combinations to accommodate different logic levels and drive requirements. All members share the same SOT-23 footprint and electrical ratings, differing primarily in internal resistance values and marking codes.

Replacement Considerations

Cross-reference with other manufacturers' NPN digital transistors in SOT-23 packages. Verify pinout compatibility and equivalent resistor ratios. Ensure replacement parts meet the 50 V voltage and 100 mA current ratings.