MCH4021-TL-H

Overview

The MCH4021-TL-H is an NPN single RF transistor manufactured by onsemi, designed for high-frequency applications. It features a collector-to-emitter voltage (VCEO) of 8 V and a maximum collector current (IC) of 150 mA. The device achieves a typical gain-bandwidth product (fT) of 16 GHz at VCE=5V and IC=50mA. Forward transfer gain |S21e|^2 reaches 17.5 dB typically at 1 GHz with VCE=5V and IC=50mA. Noise figure (NF) is specified as 1.2 dB typically at f=1 GHz under VCE=1V and IC=10mA conditions. The component utilizes the MCPH4 surface-mount package.

Feature Summary

• High cut-off frequency capability reaching 16 GHz
• Low-noise performance suitable for sensitive signal processing
• High forward transfer gain for efficient amplification

Applications

• RF amplifier circuits requiring low noise figures
• High-frequency signal processing systems
• Communication equipment operating in the microwave range

Procurement Notes

Verify the exact ordering suffix against official manufacturer documentation to ensure correct packaging and handling specifications. Confirm that the MCPH4 package dimensions align with your PCB footprint requirements. Check for static sensitivity warnings during assembly due to the high-frequency process adopted. Ensure compliance with RoHS directives if applicable to your manufacturing standards.

Selection Notes

Select this component when designing circuits that require an NPN RF transistor with an 8 V collector-to-emitter rating and high-speed operation up to 16 GHz. Consider the MCPH4 package size for space-constrained designs. Evaluate the noise figure and gain characteristics at your specific operating bias points using the provided S-parameter tables. Ensure thermal management supports the 400 mW dissipation limit.

Part Context

This part belongs to the MCH series of RF transistors from onsemi, specifically engineered for high-frequency analog and RF applications. The MCPH4 package provides a compact form factor suitable for surface-mount technology. The device is distinct from power MOSFETs or logic-level transistors, focusing instead on RF performance metrics like gain-bandwidth product and noise figure.

Replacement Considerations

Consult onsemi's official replacement guide or distributor databases for direct cross-references. Verify pinout compatibility and electrical parameters such as VCEO, IC, and fT before substitution. Ensure any alternative component meets the same MCPH4 package constraints and RF performance requirements.