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AFT18S230SR3
AFT18S230SR3
| Part Number | AFT18S230SR3 |
|---|---|
| Manufacturer | NXP Semiconductors / Freescale |
| Category | Discrete Semiconductor Products / Transistors > RF FETs, MOSFETs |
| Description | Airfast N‑Channel Enhancement‑Mode LDMOS RF Power Transistor,1805‑1880MHz,50W Average Output Power,SOT‑1799 SMT Surface‑Mount Package, EOL Discontinued, Stock Only. |
| Stock Status | In Stock (Official Discontinued EOL) |
| Origin | Original Factory |
Product Overview
AFT18S230SR3 is NXP Airfast N‑channel LDMOS RF power transistor for 1805‑1880 MHz DCS cellular base‑station. Operates at 28 V, delivers 50 W average W‑CDMA output power. Officially EOL discontinued, stock‑only. SOT‑1799 SMT surface‑mount package with internal matching for RF amplifier design.
Core Advantages
Excellent RF Performance
1805‑1880MHz working band, 50W average output power, typical gain 18.9‑19.1dB, well‑balanced efficiency and linearity for base‑station application.
Optimized For Doherty & DPD
Tuned for Doherty amplifier and DPD digital pre‑distortion system, fits GSM/W‑CDMA/LTE wireless infrastructure.
Built‑in Matching Network
Integrated input and output matching circuit, fewer external components, shorten amplifier development cycle.
High Ruggedness
Supports 20:1 VSWR load mismatch tolerance, keeps stable under multi‑carrier modulated signal.
SMT Volume Production
SR3 tape‑and‑reel package for automatic assembly. This device is EOL discontinued, supply depends on existing stock.
Key Specifications
| Brand | NXP Semiconductors / Freescale |
|---|---|
| RoHS Status | RoHS Compliant / Lead‑Free |
| EDA / CAD | PCB Footprint & 3D Model Available upon Request |
| Warranty | 1‑Year Standard Quality Warranty |
| Package / Case | SOT‑1799 (NI‑780S‑6 SMT variant) |
| Mounting Type | Surface‑Mount SMT (No bolt‑down flange) |
| Surface Marking / Silkscreen | AFT18S230S / NXP Logo |
| Transistor Type | LDMOS (N‑Channel Enhancement‑Mode) |
| Operating Frequency Range | 1805 MHz to 1880 MHz |
| Average Output Power(Pout, W‑CDMA PAR9.9dB) | 50 W (Typical) |
| Power Gain (Gps) | 18.9 ~ 19.1 dB (Typical) |
| Drain Efficiency (ηD) | 32% Typical(W‑CDMA Modulated Signal); 45% Typical(CW Doherty) |
| Drain‑Source Voltage (VDSS) | 65 V (Absolute Maximum Rating),28V(Nominal Operating) |
| Quiescent Drain Current(IDQ) | 1.4 A (Typical Spec);1.8A for performance test condition only |
| VSWR Ruggedness | 20:1 Load Mismatch Tolerance |
| Operating Junction Temperature (Tj) | ‑40℃ ~ +200℃(Long‑term working);+225℃ Absolute Maximum Destruction Limit |
| Device Status | EOL Discontinued, Only Stock Available |
Typical Applications
- GSM, W‑CDMA, LTE Cellular Base Station Power Amplifiers (PA)
- Macrocell & Microcell Wireless Infrastructure Transmitters
- Doherty Power Amplifier & DPD Digital Pre‑Distortion System
- Wireless Repeater Systems, Remote Radio Heads (RRH)
- 1800MHz Band RF High‑Power Amplifier for Communication Equipment
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Shipping Time | Shipped within 1‑2 business days |
| Delivery Time | 3‑7 working days worldwide |
| Shipping Methods | DHL, UPS, FedEx, EMS |
| Payment Methods | T/T (Bank Transfer), PayPal, Credit Card, Western Union |
Technical Support
For datasheet, S‑parameter file, sample requests, stock check, or bulk pricing, please use the Quick Inquiry form. We will reply within 24 hours.
Frequently Asked Questions
Q1: What operating frequency range is supported by the AFT18S230SR3?
A: It covers cellular DCS‑1800 band: 1805 MHz‑1880 MHz.
Q2: What is difference between AFT18S230S, AFT18S230SR5 and AFT18S230SR3? Can they replace each other directly?
A: RF die parameters are identical.
• AFT18S230S：NI‑780S‑6 ceramic flange, bulk cut‑tape.
• AFT18S230SR5：Same flange device with tape‑and‑reel packaging. S and SR5 are pin‑to‑pin direct‑replaceable.
• AFT18S230SR3：SOT‑1799 flange‑free SMT package. Different PCB footprint, cannot swap with S/SR5; PCB layout and thermal design must be modified.
Q3: Why IDQ shows 1.8A on third‑party sites while datasheet typical value is 1.4A?
A: 1.4A is official typical quiescent current. 1.8A is only test‑bench bias setting for performance measurement. Do not use 1.8A for long‑term operation to avoid overheating.
Q4: Two drain‑efficiency figures 32% and 45%, how to understand?
A: 32% is under W‑CDMA modulated signal; 45% is CW test under Doherty architecture. Results differ by test signal condition.
Q5: Is AFT18S230SR3 still in production? Are there compatible alternative parts?
A: Officially EOL discontinued, stock‑only. Alternatives: AFT18S140SR3(lower power), AFT18HW355SR3(higher power). Retune RF matching circuit when replacing.
Q6: Junction‑temperature rating reaches +225℃, can it run continuously at this temperature?
A: +225℃ is absolute destruction limit. Long‑term working junction temperature should not exceed +200℃, reserve thermal safety margin in real hardware design.
Q7: How to get datasheet, S‑parameter file or bulk quotation?
A: Request datasheets, S‑parameter files, stock and volume pricing via the Quick Inquiry form.
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