NXP Semiconductors MHT1108NT1

Overview

MHT1108NT1 from NXP Semiconductors is a 12.5 W CW RF power LDMOS transistor in DFN 4 × 6 package, operating at 2450 MHz ISM band with 18.6 dB power gain, 56.3% PAE, and 28 Vdc drain supply. It serves as the final-stage power amplifier driver in microwave oven magnetron control circuits under continuous-wave operation.

For engineers reviewing the MHT1108NT1 datasheet, MHT1108NT1 pinout, MHT1108NT1 application, or MHT1108NT1 equivalent, key selection criteria include ruggedness under >10:1 VSWR load mismatch at 2450 MHz, 150°C case temperature capability, integrated ESD protection per JESD22-A114 Class 1C, and qualification for 32 Vdc operation.

Technical Context

This N-channel enhancement-mode lateral MOSFET uses silicon-based LDMOS technology optimized for high-efficiency RF power amplification in consumer and commercial cooking systems. Its design incorporates series-equivalent large-signal impedance characterization and common-source S-parameters validated at 2450 MHz with 28 Vdc bias and 110 mA quiescent drain current.

The device features an exposed backside source terminal and 16-pin DFN package with eight parallel gate terminals and four parallel drain terminals. Thermal resistance from junction to case is 3.8 °C/W at 12.6 W CW output, enabling stable operation up to 150°C case temperature without derating.

Key Specifications

Pinout & Package

Package: DFN 4 × 6 mm plastic package with exposed backside source terminal. Thermal pad on underside provides primary heat path to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MHT1108NT1, MRF101AN offers higher output but requires more thermal headroom and lacks MSL-3 compliance, while PD57018-E delivers greater power at the cost of full PCB redesign and increased gate drive demand.

Availability

MHT1108NT1 is available at Aetrix Electronics and suitable for consumer microwave ovens, commercial cooking systems, and ISM-band magnetron driver modules requiring stable component supply across multi-year production cycles.

Supply support for MHT1108NT1 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer markets.

The MHT1108NT1 belongs to NXP's RF Power LDMOS transistor product line, engineered specifically for high-reliability, high-efficiency 2450 MHz ISM-band applications in cooking appliances where ruggedness and thermal resilience are critical.

FAQ

What is the maximum drain supply voltage rating for MHT1108NT1?

MHT1108NT1 is qualified for operation at 32 Vdc, with absolute maximum drain-source voltage rated from –0.5 V to +65 Vdc. The device is characterized and guaranteed for stable performance at 28 Vdc under typical 12.5 W CW conditions, and its ruggedness testing confirms reliable operation at 32 Vdc with 3 dB overdrive into severe load mismatches.

Does MHT1108NT1 require external ESD protection on the gate terminals?

No, MHT1108NT1 integrates ESD protection qualified to JESD22-A114 Class 1C (1000 V HBM) and JESD22-C101 Class C3 (1000 V CDM). This eliminates the need for external gate protection components in properly designed PCB layouts, reducing bill-of-materials count and improving reliability in high-volume cooking appliance manufacturing.

What is the thermal resistance from junction to case for MHT1108NT1?

The thermal resistance from junction to case (R_θJC) for MHT1108NT1 is 3.8 °C/W, measured at 97°C case temperature, 12.6 W CW output, 28 Vdc drain supply, 110 mA quiescent current, and 2450 MHz frequency. This value enables direct thermal coupling to aluminum chassis or dedicated heatsinks without thermal interface material in many consumer oven implementations.

Is MHT1108NT1 compatible with standard reflow soldering processes?

Yes, MHT1108NT1 is rated MSL Level 3 per J-STD-020 and qualified for peak reflow temperatures up to 260°C. Its DFN 4 × 6 package supports standard lead-free reflow profiles, and NXP application note AN1907 provides validated solder reflow attach methodology for high-power RF devices in over-molded plastic packages.

How does MHT1108NT1 handle load mismatch during magnetron arcing?

MHT1108NT1 is tested and guaranteed to survive >10:1 VSWR at all phase angles under CW conditions at 2450 MHz with 32 Vdc supply and 3 dB overdrive input. This ruggedness ensures no device degradation occurs during real-world magnetron arcing events, a critical requirement for long-term reliability in both consumer and commercial microwave cooking systems.