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BLX15
BLX15
| Part Number | BLX15 PHILIPS |
|---|---|
| Manufacturer | Philips Semiconductors (NXP Semiconductors) |
| Category | Discrete Semiconductor Products > Transistors > Bipolar (BJT) > RF Power Transistors |
| Description | 150W HF NPN Silicon RF Power Transistor, 50V, up to 30MHz Frequency Range, Hermetic Flanged Ceramic SOT121B Package. |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
The BLX15 is a 150W NPN silicon planar epitaxial RF power transistor from Philips Semiconductors. Designed for HF broadcast transmitters, commercial radio and industrial RF generators, it operates 1.6‑30 MHz under Class‑A/B‑C with 50V supply. Built‑in emitter ballasting delivers high ruggedness against VSWR mismatch. Housed in hermetic 4‑lead SOT121B flanged ceramic package for reliable RF power amplification.
Core Advantages
150W High Power & Linearity
Delivers up to 150W PEP/CW across 1.6‑30 MHz, offering high gain and low intermodulation distortion.
Built‑in Emitter Ballasting
Ensures even current distribution, prevents thermal runaway and withstands severe VSWR mismatch up to 30:1.
50V Operating Design
Optimized for 50V supply rails, reduces peak current loss and simplifies output matching network design.
Hermetic SOT121B Package
Military‑grade flanged ceramic housing for low thermal resistance, high mechanical strength and long‑term environmental protection.
Key Specifications
| Brand | Philips Semiconductors |
|---|---|
| RoHS Status | Non‑RoHS / Leaded (Standard Hermetic Ceramic Package) |
| EDA/CAD | Symbol, Footprint & 3D Model Available |
| Warranty | 1‑Year Standard Quality Warranty |
| Package / Case | SOT121B / Flanged Ceramic Hermetic Package |
| Mounting Type | Chassis Mount / Screw‑Flange Heat Sink Mount |
| Surface Marking / Silkscreen | BLX15,Marking |
| Transistor Polarity | NPN Silicon |
| Frequency Range | 1.6 MHz to 30 MHz (HF Band) |
| Output Power (Pout) | 150 W (PEP / CW) |
| Collector‑Emitter Breakdown Voltage (VCER) | 110 V Max |
| Collector‑Emitter Voltage (VCEO) | 53 V |
| Collector‑Base Voltage (VCBO) | 110 V |
| Maximum Collector Current (IC) | 6.5 A |
| DC Current Gain (hFE) | Min 15 (IC=2A, VCE=12V) |
| Collector Supply Voltage (VCE) | 50 V DC Nominal |
| Power Gain (Gp) | Typ. 13 dB to 15 dB (at 30 MHz) |
| Collector Efficiency | Typ. 60% or higher |
| Operating Junction Temperature (Tj) | Up to +200°C |
| Storage Temperature | -55°C ~ +200°C |
| Power Dissipation (PD) | 150W (Tc=25°C) |
| Packaging Format | Individual Anti‑Static Protective Box / Tray |
Typical Applications
- Commercial HF SSB marine, aviation, and tactical military communications transmitters
- High‑power Amateur Radio (Ham Radio) HF linear power amplifiers
- Industrial RF heating, plasma generators, and medical RF treatment units
- AM and FM broadcast transmitter driver and power output stages
- Broadband HF linear power amplifier modules (1.6 MHz to 30 MHz)
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: Is BLX15 an original NXP part?
A1: BLX15 was originally produced by Philips Semiconductors. Though its semiconductor division was acquired by NXP, genuine units only carry Philips marking, no NXP logo.
Q2: What supply voltage is recommended for BLX15?
A2: Optimized for 50V DC nominal collector supply for best linearity, efficiency and gain performance.
Q3: Are there pin‑to‑pin drop‑in replacements for BLX15?
A3: No genuine OEM direct equivalent. Aftermarket BL‑X15 shares SOT121B footprint, but electrical specs differ. Matching network re‑tuning is mandatory.
Q4: What is the difference between original BLX15 and aftermarket BL‑X15?
A4: Original Philips BLX15 is rated 150W CW. Aftermarket BL‑X15 may claim higher dissipation, yet its gain, thermal stability and VSWR ruggedness fall short of original specs.
Q5: Can BLX15 be used for VHF projects?
A5: Designed only for 1.6‑30 MHz HF band. Gain drops sharply above 30 MHz, not fit for VHF / UHF applications.
Q6: How to mount BLX15 for good thermal performance?
A6: Fasten SOT121B flange firmly to flat smooth heat sink. Apply thermal grease to reduce thermal resistance.
Q7: Can other‑brand HF RF transistors substitute BLX15?
A7: Some 150W‑class HF devices have similar power rating, but differ in pinout, breakdown voltage and gain. Circuit modification and re‑tuning are required.
Q8: How to get datasheet, photos or bulk quotation?
A8: Submit your request via Quick Inquiry form. We will return datasheet, product photos, stock status and price within 24 hours.
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