Infineon Technologies PTFA212401E V4

Overview

PTFA212401E from Infineon is a thermally-enhanced 240 W LDMOS RF power transistor designed for single- and two-carrier WCDMA base station power amplifiers in the 2110–2170 MHz band. It delivers 49 dBm average output power (single-carrier), 15.8 dB linear gain, 34% drain efficiency at 30 V, and –33 dBc adjacent channel power ratio under 3GPP signal conditions with PAR = 8.5 dB.

For engineers reviewing the PTFA212401E datasheet, PTFA212401E pinout, PTFA212401E application, or PTFA212401E equivalent, key selection criteria include broadband internal matching (2080–2200 MHz), 5:1 VSWR ruggedness at 240 W CW, 0.23 °C/W thermal resistance, and H-36260-2 slotted flange package compatibility with high-power RF PA layouts.

Technical Context

This device operates as a Class AB RF power amplifier stage in macrocell and remote radio head (RRH) transmitter chains. Its LDMOS structure enables stable operation at 30 V supply with 1.6 A quiescent drain current, integrated ESD protection (HBM Class 2), and low HCI drift for long-term linearity retention in multi-carrier WCDMA environments.

The PTFA212401E features broadband 50 Ω input/output matching optimized for 2140 MHz center frequency, supporting both 10 MHz carrier spacing (two-carrier) and full 3.84 MHz bandwidth (single-carrier) 3GPP signals. Its thermal design targets case temperatures up to 70°C under 50 W average WCDMA load, with junction temperature rated to 200°C.

Key Specifications

Pinout & Package

PTFA212401E uses the H-36260-2 thermally-enhanced slotted flange package: ceramic/metal construction with solderable flange, 3-terminal configuration (Drain, Gate, Source), and optimized thermal path through the flange to heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PTFA212401F, the PTFA212401E offers identical RF performance but enables mechanical differentiation via slotted flange for torque-controlled mounting; versus PD57018-E, it delivers +3 dB output power and +3% efficiency at same bias, reducing downstream thermal management burden.

Availability

PTFA212401E is available at Aetrix Electronics and suitable for macrocell base stations, remote radio heads, dual-carrier WCDMA transmitters, and 3GPP-compliant test equipment requiring stable component supply and long-lifecycle support.

Supply support for PTFA212401E 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, RF, and automotive ICs, with leadership in high-reliability RF power transistors for wireless infrastructure.

The PTFA series belongs to Infineon's thermally-optimized LDMOS portfolio targeting 3G/4G base station PAs, engineered for broadband matching, VSWR ruggedness, and long-term reliability in outdoor telecom environments.

FAQ

What is the recommended gate bias voltage for linear WCDMA operation?

The PTFA212401E requires a nominal gate voltage of 2.5 V (range 2.0–3.0 V) to achieve 1.6 A quiescent drain current at 30 V supply. This bias point ensures optimal linearity and efficiency trade-off for 3GPP WCDMA signals with 8.5 dB PAR, as verified in Infineon's production test fixtures.

Can PTFA212401E be operated safely at junction temperatures above 150°C?

Yes - the device is rated for 200°C maximum junction temperature. However, sustained operation above 150°C accelerates HCI degradation; Infineon specifies derating above 25°C at 4.35 W/°C, and recommends maintaining TCASE ≤70°C for 50 W average WCDMA loads to ensure 10-year reliability.

Is external input/output matching required for 2140 MHz operation?

No - the PTFA212401E integrates broadband 50 Ω input and output matching networks optimized for 2080–2200 MHz. The reference circuit shows only DC blocking and bias network components; no external RF matching elements are needed for standard 2140 MHz WCDMA PA designs.

How does the slotted flange (H-36260-2) improve thermal performance vs. standard packages?

The H-36260-2 slotted flange provides direct metal-to-heatsink contact with controlled torque (1.2 N·m), achieving 0.23 °C/W junction-to-case thermal resistance - 18% lower than non-slotted equivalents. Slots allow uniform compression across the flange surface, eliminating air gaps that increase thermal impedance in high-power RF applications.