BLF871

Ldmos, rf,100W, uhf,42V; Drain Source Voltage Vds:89V; Continuous Drain Current Id:3.7A; Power Dissipation:-; Operating Frequency Min:108Mhz; Operating Frequency Max:225Mhz; No. Of Pins:3Pins; Operating Temperature Max:200°C; Msl:- Rohs Compliant: Yes |Nxp BLF871

BLF871 – 100W UHF LDMOS RF Transistor – NXP Semiconductors
The NXP Semiconductors BLF871 is a high-power RF LDMOS transistor engineered for demanding UHF applications. Optimized for robust performance and thermal stability, this component delivers 100W output power at 42V operation, making it ideal for critical RF amplification stages. PCX supplies this industry-proven device with guaranteed authenticity, same-day shipping, and dedicated technical support.

Key Features

100W RF Power Output for high-intensity transmission
UHF Frequency Range: 108MHz to 225MHz
High Voltage Tolerance: 89V Drain-Source (Vds)
Continuous Drain Current: 3.7A (Id)
Extreme Thermal Resilience: Operates up to 200°C
3-Pin Configuration for simplified integration
RoHS Compliant design

Technical Details
This LDMOS (Laterally Diffused Metal Oxide Semiconductor) transistor utilizes advanced silicon technology to achieve high gain and efficiency in UHF bands. The 42V operating voltage enables superior power density, while the robust thermal design ensures reliability under continuous high-load conditions. Its 3-pin package (typically flange-mounted) facilitates efficient heat dissipation in amplifier assemblies.

Typical Applications

UHF broadcast transmitters and repeaters
Industrial RF heating and plasma generation systems
Land-mobile radio (LMR) base station amplifiers
Avionics and air-traffic communication equipment
Amateur radio (ham) high-power RF modules

About NXP Semiconductors
NXP Semiconductors is a global leader in high-performance mixed-signal electronics, renowned for innovation in RF power technology. With decades of expertise in LDMOS development, NXP sets industry benchmarks for power density, efficiency, and thermal management in critical communication infrastructure.
The company’s rigorous quality control and automotive-grade manufacturing standards ensure exceptional component reliability. NXP’s RF power transistors are trusted by top-tier telecom and industrial equipment manufacturers worldwide, making them a preferred choice for mission-critical applications where signal integrity and uptime are paramount.

About RF LDMOS Transistors
RF LDMOS transistors are specialized semiconductor devices designed for high-power radio frequency amplification. Their unique architecture combines high breakdown voltage with excellent thermal conductivity, enabling efficient signal boosting in frequencies from HF to UHF bands. Unlike conventional MOSFETs, LDMOS devices offer superior linearity and ruggedness under impedance mismatches.
These components form the core of modern RF power amplifiers in telecommunications, broadcasting, and industrial systems. Their ability to handle high VSWR (Voltage Standing Wave Ratio) conditions and deliver consistent power output makes them indispensable for critical transmission infrastructure, where component failure can cause significant operational disruption.

Packaging & Availability
Available in industry-standard packaging. Contact PCX for specific options including Tape & Reel (TR), Cut Tape, or bulk configurations tailored to your production requirements.

Frequently Asked Questions
Q: What heatsink requirements does the BLF871 have?
A: Due to its 100W power dissipation, a thermally optimized heatsink with low thermal resistance is mandatory. Refer to the NXP datasheet for thermal interface recommendations.

Q: Is this suitable for 200MHz FM broadcast amplifiers?
A: Yes, the 108-225MHz operating range covers FM broadcast bands. Its 100W output makes it ideal for medium-power transmitter designs.

Q: Does PCX provide samples for prototyping?
A: Yes, PCX offers sample requests for qualified engineering projects. Contact our support team for details.

Q: Are matching circuits required for this LDMOS transistor?
A: Impedance matching networks are essential for optimal power transfer and harmonic suppression. NXP’s application notes provide reference designs.

Q: Can it withstand VHF frequencies below 108MHz?
A: While functional at lower frequencies, performance characteristics like gain and efficiency may deviate from datasheet specifications.

Q: Is RoHS compliance verified?
A: Absolutely. All BLF871 transistors supplied by PCX are certified RoHS compliant per NXP’s manufacturing standards.

⚠️ Note: Product images are representational. Refer to datasheet for exact dimensions and pinouts.
Datasheet: Download BLF871 Datasheet (Hosted by PCX)

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