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MRF500 Series

MRF5812-APT, MRF553-MOT, MRF581A-APT, MRF571 Transistor, MRF5943G-APT Transistor, apt, MRF5812-MOT Ic, surface mount motorola, MRF555-APT Transistor, apt, MRF557-MOT NPN Silicon RF Low Power Transistor, 12.5 V, 870 MHz, 1.5 W, Motorola, MRF557-APT RF and Microwave Discrete Low Power Transistor, 12.5 V, 870 MHz, 1.5 W, APT, MRF555-MOT Transistor, 12 volt, , MRF515 NPN Silicon High Frequency Transistor, 12.5 V, 470 MHz, 0.75 W, Motorola
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MRF581A Microsemi RF and Microwave Discrete Low Power Transistor (NOS)
MRF581A Microsemi RF and Microwave Discrete Low Power Transistor (NOS)

In Stock

$4.91

Designed for high current, low power, low noise, amplifiers up to 1.0 GHz.



  • Low Noise - 2.5 dB @ 500 MHZ

  • High Gain, Gain at Optimum Noise Figure = 15.5 dB @ 500 MHz

  • Ftau - 5.0 GHz @ 10v, 75mA

  • Cost Effective MacroX Package


New Old Stock * No longer available for export
MFR: Microsemi
SKU: MRF581A-MSC

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MRF517 Microsemi NPN Silicon RF and Microwave Discrete Low Power Transistor
MRF517 Microsemi NPN Silicon RF and Microwave Discrete Low Power Transistor

In Stock

$7.91

MRF517 NPN Silicon RF and Microwave Discrete Low Power Transistor


New Old Stock
MFR: Microsemi
SKU: MRF517-MSC


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MRF544 APT NPN Silicon RF and Microwave Discrete Low Power Transistor (NOS)
MRF544 APT NPN Silicon RF and Microwave Discrete Low Power Transistor (NOS)

In Stock

Designed primarily for use in high frequency and medium and high resolution color video display monitors as well as other applications requiring high breakdown characteristics.



  • Silicon NPN, high Frequency, high breakdown Transistor

  • Maximum Unilateral Gain = 13.5 dB (typ) @ f = 200 MHz

  • High Collector Base Breakdown Voltage - BVCBO = 100 V (min)

  • High FT - 1400 MHz


New Old Stock * No longer available for export
MFR: APT

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MRF545 APT RF and Microwave Discrete Low Power Transistor (NOS)
MRF545 APT RF and Microwave Discrete Low Power Transistor (NOS)

In Stock

$4.91

Designed primarily for use in high frequency and medium and high resolution color video display monitors as well as other applications requiring high breakdown characteristics.



  • Silicon PNP, high Frequency, high breakdown, Transistor

  • Maximum Unilateral Gain = 14 dB (typ) @ f = 200 MHz

  • High Collector Base Breakdown Voltage - BVCBO = 100 V (min)

  • High FT - 1400 MHz


New Old Stock * No longer available for export
MFR: Advanced Power Technology RF
SKU: MRF545-APT

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MRF545 Microsemi RF and Microwave Discrete Low Power Transistor (NOS)
MRF545 Microsemi RF and Microwave Discrete Low Power Transistor (NOS)

In Stock

Designed primarily for use in high frequency and medium and high resolution color video display monitors as well as other applications requiring high breakdown characteristics.



  • Silicon PNP, high Frequency, high breakdown, Transistor

  • Maximum Unilateral Gain = 14 dB (typ) @ f = 200 MHz

  • High Collector Base Breakdown Voltage - BVCBO = 100 V (min)

  • High FT - 1400 MHz


No longer manufactured
New Old Stock * No longer available for export
MFR: Microsemi
SKU: MRF545-MSC

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MRF553 Microsemi RF and Microwave Discrete Low Power Transistor 1.5 W 175 MHz 12.5 V (NOS)
MRF553 Microsemi RF and Microwave Discrete Low Power Transistor 1.5 W 175 MHz 12.5 V (NOS)

In Stock

Designed primarily for wideband large signal stages in the VHF frequency range.



  • Specified @ 12.5 V, 175 MHz Characteristics: Output Power = 1.5 W, Minimum Gain = 11.5 dB, Efficiency 60% (Typ)

  • Cost Effective PowerMacro Package

  • Electroless Tin Plated Leads for Improved Solderability


No longer manufactured
New Old Stock * No longer available for export
MFR: Microsemi
MFR: MRF553-MSC

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MRF557 APT RF and Microwave Discrete Low Power Transistor 12.5 V 870 MHz 1.5 W (NOS)
MRF557 APT RF and Microwave Discrete Low Power Transistor 12.5 V 870 MHz 1.5 W (NOS)

In Stock

Designed primarily for wideband large signal stages in the UHF frequency range.



  • Specified @ 12.5 V, 870 MHz Characteristics: Output Power = 1.5 W, Minimum Gain = 8 dB, Efficiency 60% (Typ)

  • Cost Effective PowerMacro Packa

  • Electroless Tin Plated Leads for Improved Solderability


New Old Stock * No longer available for export
MRF: APT
SKU: MRF557-APT

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MRF557 Microsemi RF and Microwave Discrete Low Power Transistor (NOS)
MRF557 Microsemi RF and Microwave Discrete Low Power Transistor (NOS)

In Stock

Designed for high current, low power, low noise, amplifiers up to 1.0 GHz.



  • Low Noise - 2.5 dB @ 500 MHZ

  • Gain at Optimum Noise Figure = 15.5 dB @ 500 MHz

  • Ftau - 5.0 GHz @ 10v, 75mA

  • Cost Effective MacroX Package


New Old Stock * No longer available for export
MFR: Microsemi
SKU: MRF557-MSC

Add to Cart
MRF559 Microsemi RF and Microwave Discrete Low Power Transistor 0.5W 870 MHz 12V (NOS)
MRF559 Microsemi RF and Microwave Discrete Low Power Transistor 0.5W 870 MHz 12V (NOS)

In Stock

$4.91

Designed primarily for wideband large signal stages in the UHF frequency range.



  • Specified @ 12.5 V, 870 MHz Characteristics: Output Power = .5 W, Minimum Gain = 8.0 dB, Efficiency 50%

  • Cost Effective Macro X Package

  • Electroless Tin Plated Leads for Improved Solderability


New Old Stock * No longer available for export
MFR: Microsemi
SKU: MRF559-MSC

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MRF581G Microsemi Transistor (NOS)
MRF581G Microsemi Transistor (NOS)

In Stock

$3.91


  • Transistor Type: NPN

  • Voltage - Collector Emitter Breakdown (Max): 18V

  • Frequency - Transition: 5GHz

  • Noise Figure (dB Typ @ f): 3dB ~ 3.5dB @ 500MHz

  • Gain: 13dB ~ 15.5dB

  • Power - Max: 1.25W

  • DC Current Gain (hFE) (Min) @ Ic, Vce: 50 @ 50mA, 5V

  • Current - Collector (Ic) (Max): 200mA

  • Operating Temperature: 150°C (TJ)

  • Mounting Type: Surface Mount


No longer manufactured
New Old Stock * No longer available for export
MFR: Microsemi
SKU: MRF581G-MSC

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