NXP Semiconductors MRF300ANBN-88MHZ

Overview

MRF300ANBN-88MHZ from NXP Semiconductors is a high-ruggedness, 300 W CW, 50 V LDMOS RF power transistor optimized for HF/VHF broadband amplification up to 250 MHz. It delivers 325 W output at 81.36 MHz with 25.1 dB power gain and 77.5% drain efficiency under CW conditions, and supports pulse operation up to 330 W peak at 230 MHz. It is used in industrial plasma etching systems requiring stable high-power RF delivery.

For engineers reviewing the MRF300ANBN-88MHZ datasheet, MRF300ANBN-88MHZ pinout, MRF300ANBN-88MHZ application, or MRF300ANBN-88MHZ equivalent, key selection criteria include its TO-247-3L package, mirror-pinout compatibility with MRF300BN, 133 VDS breakdown rating, ESD-protected gate, and ruggedness against >65:1 VSWR load mismatches at 230 MHz.

Technical Context

This device is an enhancement-mode lateral MOSFET fabricated using NXP's high-voltage LDMOS process. It operates with a fixed 50 VDC drain supply and exhibits linear gain behavior across 13.56–230 MHz, validated via NXP reference circuits including dedicated 81.36 MHz (MRF300AN-81MHZ) and 230 MHz fixtures.

Its thermal design centers on low junction-to-case resistance (0.55 °C/W CW, 0.13 °C/W pulsed), enabling high-power dissipation at case temperatures up to +150 °C. Gate threshold voltage is tightly specified (1.7–2.7 V), and integrated ESD protection meets HBM Class 2 (2500 V) and CDM Class C3 (1200 V).

Key Specifications

Pinout & Package

TO-247-3L package with exposed metal backside acting as the source terminal. Mounting surface must be electrically connected to system ground and thermally coupled to heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF300BN and MRFE6VP6300H, the MRF300ANBN-88MHZ offers superior gain (25.1 dB) and efficiency (77.5%) specifically at 81.36 MHz, with mature, documented reference designs and guaranteed 15-year supply-making it optimal for industrial RF heating and plasma systems operating near that frequency.

Availability

MRF300ANBN-88MHZ is available at Aetrix Electronics and suitable for industrial plasma etching, medical MRI RF excitation, and VHF broadcast transmitter applications requiring stable component supply and long-term lifecycle assurance.

Supply support for MRF300ANBN-88MHZ 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 communication markets, with deep expertise in RF power technologies.

The MRF300ANBN-88MHZ belongs to NXP's high-ruggedness LDMOS RF power transistor family, engineered for mission-critical industrial, scientific, and medical (ISM) applications demanding reliability, efficiency, and long-term supply stability.

FAQ

What is the maximum continuous drain current rating for the MRF300ANBN-88MHZ?

The MRF300ANBN-88MHZ does not specify a maximum continuous drain current (I_D) rating directly; instead, it is characterized by total device dissipation (P_D = 272 W @ T_C = 25 °C) and thermal resistance (R_θJC = 0.55 °C/W). At 50 V_DD, its 300 W CW output implies average drain current of ~6 A, but actual I_D depends on duty cycle, matching, and thermal management. The MRF300ANBN-88MHZ datasheet defines safe operation via junction temperature limits (T_J ≤ +175 °C) rather than current alone.

Does the MRF300ANBN-88MHZ require external gate protection diodes?

No-the MRF300ANBN-88MHZ integrates ESD protection meeting Human Body Model Class 2 (2500 V) and Charge Device Model Class C3 (1200 V), eliminating the need for external gate protection diodes in standard designs. This is confirmed in Table 3 of the NXP datasheet. However, for systems exposed to extreme ESD events beyond these ratings-or where gate drive circuits lack current limiting-additional protection may still be prudent. The MRF300ANBN-88MHZ gate-source voltage limit remains ±6.0 V.

Can the MRF300ANBN-88MHZ be operated at 88 MHz even though no reference circuit is published for that exact frequency?

Yes-the MRF300ANBN-88MHZ is specified for 1.8–250 MHz operation, and performance data is provided at adjacent frequencies: 81.36 MHz (325 W, 25.1 dB, 77.5%) and 144 MHz (320 W, 23.0 dB, 73.0%). Interpolation confirms usable performance at 88 MHz, and its broadband matching networks (e.g., MRF300AN-81MHZ) can be retuned. The MRF300ANBN-88MHZ thermal and ruggedness specs remain fully valid at 88 MHz, as verified by its 230 MHz pulse test conditions.

What is the recommended gate bias voltage for linear operation of the MRF300ANBN-88MHZ?

The MRF300ANBN-88MHZ is typically biased at I_DQ = 100 mA for linear RF amplification, corresponding to a gate quiescent voltage (V_GS(Q)) of 2.5 V (typical) at V_DD = 50 V. This value is specified in Table 5 of the datasheet and used across all NXP reference circuits (e.g., 13.56 MHz, 40.68 MHz, 81.36 MHz). For improved linearity in AM/SSB applications, slight adjustment (±0.1–0.2 V) around 2.5 V may be performed while monitoring I_DQ; the MRF300ANBN-88MHZ gate threshold range is 1.7–2.7 V.

Is the MRF300ANBN-88MHZ pin-compatible with the older MRF300AN or MRF300BN variants?

The MRF300ANBN-88MHZ is a variant designation referencing the MRF300AN device configured for 88 MHz operation-its pinout matches the standard MRF300AN (Pin 1 = Gate, Pin 2 = Source, Pin 3 = Drain), not the mirrored MRF300BN. Therefore, it is pin-compatible with MRF300AN but not with MRF300BN. The "BN" suffix in MRF300ANBN-88MHZ denotes a specific ordering/bundling variant, not a pinout change; all electrical and mechanical specifications align with the MRF300AN datasheet Rev. 2 (06/2019).