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BLF888B
BLF888B
| Part Number | BLF888B |
|---|---|
| Manufacturer | Ampleon (Formerly NXP Semiconductors) |
| Category | Discrete Semiconductor Products / Transistors > RF FETs, MOSFETs |
| Description | 650W LDMOS Power Transistor, 470 MHz to 860 MHz UHF Band, 50V Supply, SOT‑539A Flange Ceramic Package. |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
BLF888B is Ampleon’s N‑channel LDMOS RF power transistor for 470‑860 MHz UHF broadcast and industrial RF applications. Rated for 50 V supply, it delivers 650 W peak power with high gain and excellent linearity for DVB‑T / ATSC digital TV systems. It adopts SOT‑539A ceramic flange package with built‑in input matching for stable continuous‑wave high‑power operation.
Core Advantages
UHF Broadcast Band Optimized
Tuned for 470‑860 MHz, low IMD for analog and digital TV transmitters.
High Power & Efficiency
650 W peak output, high drain efficiency to reduce power consumption and cooling requirements.
Built‑in Input Matching
Integrated matching network cuts external components and simplifies PCB design.
High‑Ruggedness Package
SOT‑539A flange package, supports 10:1 VSWR tolerance with reliable thermal dissipation for CW operation.
Key Specifications
| Brand | Ampleon (Formerly NXP Semiconductors) |
|---|---|
| RoHS Status | RoHS Compliant / Lead‑Free |
| EDA / CAD | PCB Footprint & 3D Model Available upon Request |
| Warranty | 1‑Year Standard Quality Warranty |
| Package / Case | SOT‑539A / Flanged Ceramic Package (with mounting lugs) |
| Mounting Type | Chassis Mount / Bolt‑Down Flange Mount |
| Surface Marking / Silkscreen | BLF888B / Ampleon Logo |
| Transistor Technology | LDMOS (N‑Channel Enhancement‑Mode) |
| Operating Frequency Range | 470 MHz to 860 MHz (UHF Band) |
| Peak Output Power (P1dB / Peak) | 650 W |
| Power Gain (Gps) | > 20 dB (Typical at 860 MHz) |
| Drain Efficiency (ηD) | > 50% (Typical) |
| Drain‑Source Voltage (VDSS) | 104 V (Max Rating), 50V (Nominal Operating) |
| Gate‑Source Voltage (VGS) | -0.5 V to +11 V |
| VSWR Ruggedness | Up to 10:1 Load Mismatch Tolerance |
| Operating Junction Temperature (Tj) | Up to +200°C |
| Storage Temperature Range | ‑65°C ~ +150°C |
| Thermal Resistance (Rth(j‑c)) | 0.15 K/W (Junction to Case) |
Typical Applications
- Digital UHF TV Transmitters (DVB‑T, DVB‑T2, ATSC, ISDB‑T)
- Analog TV Broadcasting Power Amplifiers
- Industrial, Scientific, and Medical (ISM) RF Generators
- UHF Band High‑Power Communications Infrastructure
- Linear Power Amplifiers for Communication and Broadcast Systems
- Doherty architecture main amplifier design
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, sample requests, stock check, or bulk pricing, please use the Quick Inquiry form. We will reply within 24 hours.
Frequently Asked Questions
Q1: What is the operating frequency of BLF888B?
A: It targets UHF band 470 MHz‑860 MHz for broadcast applications.
Q2: What is peak output power for BLF888B?
A: 650 W peak power under 50 V nominal supply voltage.
Q3: Difference among BLF888A, BLF888B, BLF888AS, BLF888BS?
A: Pin‑to‑pin mechanically compatible. A/AS:600W; B/BS:650W. S suffix = ear‑less flat‑flange package. BLF888A/B:SOT‑539A(with lugs); BLF888AS/BS:SOT‑539B(earless). Electrical parameters differ, circuit retuning is mandatory before replacement.
Q4: Installation notes for SOT‑539A package?
A: Mount flange tightly onto flat high‑efficiency heatsink with quality thermal grease for CW high‑power heat dissipation.
Q5: Temperature limits for BLF888B?
A: Max junction Tj up to +200°C; storage temperature ‑65°C ~ +150°C. Avoid long‑term operation near maximum junction temperature.
Q6: Can BLF888A replace BLF888B directly?
A: Mechanically pin‑compatible, but BLF888A only 600W. Gain and linearity differ. Direct swap without circuit re‑testing is not allowed.
Q7: How to get datasheet and bulk quotation?
A: Submit quick inquiry for datasheet, reference circuit, stock status and volume price.
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