KSR1101MTF

Overview

The KSR1101MTF is a single NPN digital transistor manufactured by Fairchild Semiconductor, now part of onsemi. It integrates an NPN epitaxial silicon transistor with built-in bias resistors in a compact SOT-23-3 surface-mount package. Key electrical specifications include a collector-emitter voltage (VCEO) of 50 V and a continuous collector current of 100 mA. The device features a typical input resistance of 1 kOhm and a minimum DC current gain (hFE) of 68. It operates within a temperature range of -55°C to +150°C.

Feature Summary

• Integrates NPN transistor with built-in bias resistors for simplified circuit design
• Compact SOT-23-3 surface-mount package suitable for space-constrained applications
• High thermal stability with extended operating temperature range up to 150°C

Applications

• General-purpose switching circuits
• Driver stages for low-power loads
• Logic level translation interfaces

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm lot traceability and RoHS compliance status prior to procurement. Ensure storage conditions meet moisture sensitivity level requirements to prevent package damage during soldering processes.

Selection Notes

Select this component when a single NPN switch with integrated base biasing is required. Verify that the 50 V VCEO rating exceeds the maximum circuit voltage. Ensure the 100 mA collector current capability meets load requirements. Compare input resistance values against driving source capabilities to ensure proper logic level interfacing.

Part Context

This component belongs to the KSR series of digital transistors from Fairchild Semiconductor. These devices combine bipolar junction transistors with internal resistor networks to reduce external component count. The series offers various resistance ratios and configurations for different switching applications.

Replacement Considerations

Check for pin-compatible alternatives within the same KSR series or equivalent NPN digital transistors from other manufacturers. Verify matching VCEO, IC ratings, and hFE characteristics. Ensure the replacement maintains the same SOT-23-3 package footprint and thermal performance.