NXP Semiconductors MRF101AN-VHF

Overview

MRF101AN-VHF from NXP Semiconductors is a high-ruggedness, 50 V, N-channel enhancement-mode LDMOS RF power transistor optimized for broadband VHF operation from 136–174 MHz. It delivers 104 W CW output power with 21.2 dB power gain and 76.5% drain efficiency at 155 MHz under 50 Vdc bias and 100 mA quiescent drain current - enabling robust final-stage amplification in broadcast transmitters and industrial RF heating systems.

For engineers reviewing the MRF101AN-VHF datasheet, MRF101AN-VHF pinout, MRF101AN-VHF application, or MRF101AN-VHF equivalent, this page provides verified VHF-band performance data, validated reference circuit impedance values (e.g., Z_source = 5.3 + j10.8 Ω / Z_load = 10.2 + j6.2 Ω at 155 MHz), ruggedness test results (>65:1 VSWR tolerance), and TO-220-3L package integration guidance.

Technical Context

This device operates as a common-source RF power amplifier stage with gate-controlled transconductance (g_fs = 7.1 S typical) and integrated ESD protection (HBM Class 1B, CDM Class C3). Its lateral LDMOS structure supports linear and Class C operation across 136–174 MHz using fixed 50 Vdc drain supply and adjustable gate bias (V_GS(Q) = 2.5 V typical).

Thermal design relies on low junction-to-case thermal resistance (R_θJC = 1.1 °C/W for CW, Z_θJC = 0.37 °C/W for pulsed operation), with maximum junction temperature rated to +175 °C and case temperature to +150 °C - enabling high-reliability deployment in air-cooled broadcast and ISM equipment.

Key Specifications

Pinout & Package

TO-220-3L package with exposed backside tab serving as source terminal. Mounting surface must be electrically isolated and thermally coupled to heatsink.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF power transistor applications.

Compared with MRF101BN-VHF, the MRF101AN-VHF offers identical RF performance but simplified single-ended layout; versus MRFE6VP61K25H, it provides lower-cost, space-constrained VHF amplification without over-specifying voltage or power capability.

Availability

MRF101AN-VHF is available at Aetrix Electronics and suitable for FM broadcast transmitters, industrial plasma generators, VHF medical diathermy systems, and land mobile radio base stations requiring stable component supply across multi-year production cycles.

Supply support for MRF101AN-VHF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and communications markets.

The MRF101AN-VHF belongs to NXP's RF Power LDMOS transistor family, engineered for rugged, high-efficiency amplification in HF/VHF industrial, broadcast, and aerospace systems - with emphasis on reliability under mismatched loads and long-term supply assurance.

FAQ

What is the maximum continuous drain current rating for the MRF101AN-VHF?

The MRF101AN-VHF does not specify a maximum continuous drain current (I_D) rating directly; instead, its safe operating area is defined by maximum drain-source voltage (V_DSS = +133 V), total device dissipation (P_D = 182 W at T_C = 25 °C), and thermal resistance (R_θJC = 1.1 °C/W). At 50 Vdc operation and 104 W output, typical I_D remains within limits set by these parameters - confirmed in NXP's 136–174 MHz reference circuit testing.

Does the MRF101AN-VHF require external gate protection diodes?

No, the MRF101AN-VHF incorporates integrated ESD protection rated to HBM Class 1B (1000 V) and CDM Class C3 (1200 V), eliminating the need for external gate protection diodes in standard RF amplifier layouts. This is explicitly documented in Table 3 of the official NXP datasheet and validated in production reference designs.

What is the recommended gate bias voltage for linear operation of the MRF101AN-VHF?

The recommended quiescent gate-source voltage (V_GS(Q)) for linear operation of the MRF101AN-VHF is 2.5 Vdc (typical), established at V_DD = 50 Vdc and I_DQ = 100 mA - as specified in Table 4 of the NXP datasheet and used across all validated reference circuits including the MRF101AN-VHF 136–174 MHz design.

Can the MRF101AN-VHF be used in Class C amplifier configurations?

Yes, the MRF101AN-VHF supports Class C operation due to its extended negative gate-source voltage range (V_GS = –6.0 V) and integrated ESD protection - features explicitly cited in the "Features" section of the NXP datasheet as enabling improved Class C performance in industrial RF heating and broadcast applications.

Is the MRF101AN-VHF pin-compatible with the standard MRF101AN part number?

Yes, the MRF101AN-VHF shares identical TO-220-3L packaging and pinout (Pin 1: Gate, Pin 2: Source, Pin 3: Drain) with the base MRF101AN, differing only in its characterization and validation for the 136–174 MHz VHF band - as confirmed in Table 7 ("Ordering Information - Reference Circuits") where MRF101AN-VHF is explicitly designated as the 136–174 MHz reference circuit variant.