Product Overview
Motorola MRF559 NPN RF Transistor - 870 MHz UHF Amplifier, 0.5W, SMT-4 Macro-X Package, Unused NOS
Condition
Unused NOS. Genuine Motorola part sourced from an electronics distributor consolidating inventory. Four-lead Macro-X (SMT-4) package with clean leads and no corrosion. Date code V 5 G visible on cap. Stored on anti-static foam. No function testing performed - visual inspection confirms excellent physical condition. Covered by our no-hassle guarantee.
Ships same business day from Idaho. Packed carefully.
No hassle resolution if there is an issue. Serving customers since 1999.
Product Overview
Motorola MRF559, NPN silicon high-frequency transistor designed for UHF linear and large-signal amplifier applications. Specified at 870 MHz with 0.5W output power, 8.0 dB minimum gain, and 50% efficiency at 12.5 Vdc. S-parameter data available from 250 MHz to 1.5 GHz. Four-lead Macro-X (SMT-4) package. Recommended driver for Motorola MHW808 and MHW820 power modules.
Key Features
- Transistor type: NPN silicon
- Output power: 0.5W at 870 MHz
- Minimum gain: 8.0 dB
- Efficiency: 50%
- Operating voltage: 12.5 Vdc (specified performance)
- Collector-emitter voltage (VCEO): 16 Vdc maximum
- Collector current: 150 mAdc maximum
- Package: Macro-X (SMT-4), four-lead
Applications
- UHF RF power amplifier stages
- Radio transmitter driver circuits
- Driver for Motorola MHW808 and MHW820 power modules
- Signal booster and oscillator circuits in the UHF band
- Ham radio and experimental RF projects requiring a low-power UHF NPN driver
Frequently Asked Questions
What package type is this, and will it fit my board layout?
Macro-X (SMT-4) four-lead package. Verify your PCB footprint matches this package before ordering. The SMT-4 pinout is confirmed - check the MRF559 datasheet for exact pad dimensions.
Is this a genuine Motorola part?
Yes. Sourced from an electronics distributor consolidating inventory. The Motorola mark and date code V 5 G are visible on the cap. Leads are clean with only the light surface oxidation typical of stored NOS components.
Has this been function tested?
No. Visual inspection only. Physical condition is excellent - no damage, bends, or corrosion on the package or leads. Verify against your circuit requirements before use.
What supply voltage does this transistor require?
Specified performance is at 12.5 Vdc. Maximum collector-emitter voltage is 16 Vdc. Do not exceed maximum ratings.
The MRF559 has been sitting in NOS stock while the ham radio and RF hobbyist communities quietly kept its datasheet alive. Now it is ready for whatever UHF project you have been waiting to build.
