MRF545

Description：RF TRANS PNP 70V 1.4GHZ TO-39
Series：-

SKU:7cdfe1e24eef Category: Bipolar RF Transistors Brand: Microsemi Corporation

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Product introduction

Product Detailed Parameters

Description：RF TRANS PNP 70V 1.4GHZ TO-39
Series：-
Mfr：Microsemi Corporation
Package：Bulk
Transistor Type：PNP
Voltage - Collector Emitter Breakdown (Max)：70V
Frequency - Transition：1GHz ~ 1.4GHz
Noise Figure (dB Typ @ f)：-
Gain：14dB
Power - Max：3.5W
DC Current Gain (hFE) (Min) @ Ic, Vce：15 @ 50mA, 6V
Current - Collector (Ic) (Max)：400mA
Operating Temperature：-
Mounting Type：Through Hole
Package / Case：TO-205AD, TO-39-3 Metal Can
Supplier Device Package：TO-39
Grade：-
Qualification：-

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MRF545

Overview

The MRF545 is a PNP bipolar RF transistor manufactured by Microsemi Corporation, housed in a TO-39 through-hole package. It operates within a frequency range of 1 GHz to 1.4 GHz and supports a maximum power output of 3.5W with a DC current gain of 15 at 50mA and 6V. The device features a transition frequency (fT) of 1400 MHz and a noise figure of 13.5 dB. Designed for high-frequency applications, it withstands a collector-emitter voltage of 25V and handles up to 400mA of current.

Feature Summary

Designed primarily for use in high frequency and medium and high resolution color video display monitors
Suitable for applications requiring high breakdown voltage capabilities
Optimized for Class A common emitter operation

Applications

High frequency circuit design
Medium and high resolution color video display monitors
Applications requiring high breakdown voltage

Procurement Notes

Verify the manufacturer origin carefully, as the MRF545 has been produced by multiple vendors including Motorola and Microsemi. Confirm that the specific unit received matches the required electrical specifications, particularly the transition frequency and power ratings, as datasheets may vary between original equipment manufacturers. Ensure the TO-39 package type aligns with your thermal and mechanical requirements.

Selection Notes

Select this component when a PNP bipolar RF transistor is required for frequencies up to 1.4 GHz. Consider the 3.5W power handling and 25V voltage rating against your circuit's load and supply constraints. The TO-39 package dictates specific mounting and thermal management strategies compared to surface-mount alternatives.

Part Context

This part belongs to the Bipolar RF Transistors family from Microsemi Corporation. It serves as a discrete solution for radio frequency amplification tasks where through-hole mounting is preferred or required. The device complements other small-signal transistors in the portfolio designed for similar high-frequency environments.