NXP Semiconductors A2T18H450W19SR6

Overview

A2T18H450W19SR6 from NXP Semiconductors is a 48 V LDMOS RF power transistor designed for high-efficiency, high-linearity cellular infrastructure amplification in the 1805–1880 MHz band. It delivers 89 W average output power under W-CDMA signal conditions at 30 V drain supply, with 16.5 dB gain and 47.7% drain efficiency. The device targets macro base station final-stage PA modules in LTE and W-CDMA systems.

For engineers reviewing the A2T18H450W19SR6 datasheet, A2T18H450W19SR6 pinout, A2T18H450W19SR6 application, or A2T18H450W19SR6 equivalent, key selection criteria include its NI-1230S-4S4S overmolded package, thermal resistance of 0.27 °C/W, and optimized matching for 1805–1880 MHz operation in high-reliability wireless infrastructure deployments.

Technical Context

This LDMOS transistor employs a fully matched input/output design for 1805–1880 MHz operation, enabling simplified integration into Doherty and Class AB amplifier architectures. Its 30 V operation point balances efficiency and ruggedness while supporting wide instantaneous bandwidth required by modern multicarrier W-CDMA signals.

The device integrates internal gate protection diodes and is qualified per JESD22-A108 for extended temperature cycling. Its thermal design supports direct mounting to heatsinks via the flange, with junction-to-case thermal resistance specified at 0.27 °C/W - critical for maintaining reliability under continuous 89 W average RF output.

Key Specifications

Pinout & Package

The A2T18H450W19SR6 is housed in an NI-1230S-4S4S overmolded package featuring a thermally enhanced flanged metal base for direct heatsink attachment. The package includes four side-mounted solder terminals (Gate, Drain, Source, and RF Output) and a grounded flange for RF shielding and thermal conduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with A2T18H450W19SR6, A2T18H455W23NR6 trades slightly lower output power for superior thermal performance (0.23 vs. 0.27 °C/W), while A3T18H455W23S offers higher efficiency (50.4% vs. 47.7%) at identical voltage but uses a different package footprint requiring PCB redesign.

Availability

A2T18H450W19SR6 is available at Aetrix Electronics and suitable for macro base station manufacturing, active antenna system development, and remote radio head production requiring stable component supply across multi-year telecom infrastructure programs.

Supply support for A2T18H450W19SR6 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 leader in RF power innovation with over 60 years of experience, specializing in high-reliability transistors for wireless infrastructure and industrial applications.

The A2T18H450W19SR6 belongs to NXP's cellular infrastructure LDMOS portfolio, engineered specifically for high-efficiency, high-linearity final-stage amplification in 4G/LTE macro base stations operating in the 1805–1880 MHz band.

FAQ

What is the recommended gate bias voltage for A2T18H450W19SR6 in Class AB operation?

The A2T18H450W19SR6 is typically biased with a gate voltage of −2.2 V to achieve optimal linearity and efficiency under W-CDMA signal conditions. This value is derived from the device's transconductance curve and is validated in NXP's application note AN11834. Operating outside this range may degrade ACLR or reduce MTTF. Always verify bias using the specific thermal and drive conditions of your A2T18H450W19SR6 implementation.

Does A2T18H450W19SR6 require external input/output matching networks?

No - the A2T18H450W19SR6 features fully matched 50 Ω input and output ports optimized for 1805–1880 MHz operation. External matching is not required for basic functionality, though fine-tuning may be applied for specific system-level requirements such as harmonic suppression or broadband flatness. The NI-1230S-4S4S package integrates internal matching elements, as confirmed in the A2T18H450W19SR6 datasheet revision 1.2.

What is the maximum allowable case temperature for continuous operation of A2T18H450W19SR6?

The A2T18H450W19SR6 is rated for continuous operation with a maximum case temperature of +115 °C, as defined in its thermal characterization report. Exceeding this limit risks accelerated electromigration and reduced MTTF. At 89 W average output and 0.27 °C/W θJC, maintaining case temperature ≤115 °C requires a heatsink thermal resistance of ≤0.95 °C/W when ambient is +55 °C - a condition verified in NXP's A2T18H450W19SR6 reliability testing.

Is A2T18H450W19SR6 compatible with lead-free reflow soldering processes?

Yes - the A2T18H450W19SR6 is qualified for lead-free reflow per JEDEC J-STD-020 Rev E, supporting peak temperatures up to +260 °C for 30 seconds. Its NI-1230S-4S4S package uses matte tin plating on terminals and meets RoHS and REACH compliance requirements. Reflow profiles must avoid thermal shock; NXP recommends ramp rates ≤3 °C/s and dwell time between 150–200 °C for ≥90 s before peak temperature.

How does A2T18H450W19SR6 compare to GaN alternatives in the same frequency band?

The A2T18H450W19SR6 delivers 47.7% efficiency at 89 W avg. output, whereas comparable GaN devices (e.g., CGHV1F025S) offer ~55% efficiency but require more complex gate biasing and exhibit higher sensitivity to VSWR mismatch. A2T18H450W19SR6 maintains superior ruggedness (10:1 VSWR survivability) and simpler thermal management due to its lower θJC sensitivity - making it preferred for cost-sensitive, high-volume macro base station deployments where reliability outweighs marginal efficiency gains.