Radio & Amplifier Service Parts

• 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

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

RF Power Field Effect Transistor RF Mosfet 512 MHz 7.0W 7.5V
New Old Stock * No longer available for export
MFR: Motorola
SKU: MRF5007

NPN Silicon Power Transistor Stud Mount 60W 30 MHz 12.5 V
New Old Stock * No longer available for export
MFR: Motorola
SKU: MRF454A-MOT

Designed for power amplifier applications in industrial, commercial and amateur radio equipment to 30 MHz.  4 Transistors in a Matched Set.

• Specified 12.5 V, 30 MHz characteristics — Output power = 60 W, Minimum gain = 13 dB

MFR: M/A-COM
SKU: MRF455MQ-MA

Designed primarily for application as a high–power linear amplifier from 2.0 to 30 MHz.

• Specified 12.5 V, 30 MHz characteristics — Output power = 100 W (PEP), Minimum gain = 10 dB, Efficiency = 40%
• Intermodulation distortion @ 100 W (PEP) — IMD = –30 dB (min.)
• 100% tested for load mismatch at all phase angles with 30:1 VSWR

MRF: M/A-COM
SKU: MRF421MQ-MA

Designed primarily for applications as a high–power linear amplifier from 2.0 to 30 MHz.

• Specified 28 V, 30 MHz characteristics — Output power = 150 W (PEP), Minimum gain = 10 dB, Efficiency = 40%
• Intermodulation distortion @ 150 W (PEP) —IMD = –30 dB (min.)
• 100% tested for load mismatch at all phase angles with 30:1 VSWR
• Pulled from working equipment, scoped and tested.

Used * No longer available for export
MFR: Motorola
SKU: MRF422-MOT-P

Low Beta Version of MRF454
Pulled from working equipment. Scoped and tested to meet specifications

Used * No longer available for export
MFR: Motorola 
SKU: MRF458-P

Designed for power amplifier applications in industrial, commercial, and amateur radio equipment to 30 MHz.

• Specified 12.5 V, 30 MHz characteristics: Output power = 50 W, Minimum gain = 11 dB, Efficiency = 50% 

Used * No longer available for export
MFR: Motorola
SKU: MRF450-P