MS1337

Overview

The MS1337 is a high-gain NPN bipolar RF transistor designed for mobile VHF applications. It features an M113 chassis-mount package with an 18V collector-emitter breakdown voltage and a maximum collector current of 8A. The device supports a transition frequency of 175MHz and delivers a maximum power output of 70W, making it suitable for RF amplifiers, oscillators, and switch-mode circuits.

Feature Summary

• High-gain NPN configuration optimized for RF signal processing
• Chassis-mount construction for efficient thermal dissipation in high-power scenarios
• Robust electrical ratings supporting up to 8A collector current and 70W power handling

Applications

• RF amplifiers
• Oscillators
• Switch-mode circuits
• Mobile VHF radio transmitters

Procurement Notes

Verify component authenticity due to obsolete status and potential availability as New Old Stock. Confirm manufacturer lineage from Microsemi Corporation or subsequent acquirer Microchip Technology. Ensure the M113 package variant matches system requirements. Check for export restrictions on NOS inventory before procurement.

Selection Notes

Select this component for high-power VHF RF applications requiring robust thermal management via chassis mounting. Evaluate the 175MHz transition frequency against specific circuit bandwidth needs. Consider the 8A current rating for load compatibility. Verify supply chain availability given the component's discontinued status.

Part Context

The MS1337 belongs to the M113 series of high-power RF transistors. It was originally manufactured by Microsemi Corporation, which has since been acquired by Microchip Technology. This part represents a legacy solution for VHF mobile communications infrastructure.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, direct replacements may require design modifications or alternative sourcing strategies.