Product Introduction: Guangdong Jiaxun Electronics STR1550 High-Voltage Fast-Switching NPN Power Transistor

Jiaxun Electronics of Guangdong has launched the STR1550, a high‑performance, high‑voltage, fast‑switching NPN power transistor designed specifically for high‑reliability, high‑density circuit applications. With its outstanding electrical performance and compact package, this device demonstrates exceptional suitability for LED drivers, power management, and other fields.

Guangdong Jiaxun Electronics launched by (Jiaxun Electronics) STR1550 It is a high-performance, high-voltage, fast-switching device. NPN power transistor , specifically designed for high-reliability, high-density circuit applications. With its outstanding electrical performance and compact package, this product demonstrates exceptional suitability in areas such as LED driving and power management.

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Core Features

• High pressure, high speed : Adopt Diffused Collector Plane Technology , supports up to 500V The collector–emitter voltage ( VCEO ), while also enabling fast switching to meet the demands of high-frequency applications.
• Excellent linearity : Maintains a stable DC current gain (ℎ) within the 50 mA range. hFE ), ensuring that signal amplification is precise and reliable.
• Micro-package ： SOT-23 surface-mount package (Measuring only 2.75 × 3.04 mm), it is ideal for space-constrained PCB designs and supports automated surface-mount assembly.
• Wide-temperature operation It can operate reliably in harsh environments ranging from **–65°C to 150°C**, making it suitable for industrial‑grade applications.
• Complementary model : The complementary PNP-type product STR2550 is provided to facilitate the design of symmetrical circuits.

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Typical Applications

• LED driver circuit : Supports high-efficiency constant-current driving, suitable for LED lighting, backlight modules, and more.
• Switching power supply : used for Flyback converter 、 DC-DC module High-voltage switching scenarios.
• Industrial Control : Applications requiring rapid switching, such as motor drives and relay control.

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Key Performance Parameters

1. Electrical Limit Parameters

• Collector–emitter voltage ( VCEO ): 500V
• Collector peak current ( ICM ): 1A (pulse width < 5 ms)
• Maximum power consumption ( PTOT ): 500 mW (at an ambient temperature of 25°C)

 

1. Electrical Characteristics

• Collector cutoff current ( ICBO ): <10 μA (=500 VCB =500 V )
• Saturation voltage drop ( ( ) VCE ( sat )）：≤0.3V（ =50 IC =50 mA )
• DC current gain (ℎ) hFE ): 100~300 (=50 IC =50 mA )

 

1. Thermal management

• Thermal resistance ( ℎ Rth ): 250°C/W (based on a 1 cm² PCB thermal dissipation area)

 

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Mechanics and Packaging

• SOT-23 package : Complies with industry standards, features a compact footprint (typical dimensions: 2.75 × 3.04 mm), and supports high-density packaging.
• Recommended Pad Design : Provides an optimized pad layout (see Figure 10) to ensure soldering reliability and reduce thermal stress.

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Technological Advantages

• High reliability : By designing a planar edge‑terminal structure, the reverse‑bias safe operating area (RBSOA) is expanded, and impact‑tolerance is improved.
• Energy-saving and efficient : Low saturation voltage drop ( ( )<0 .3 VCE ( sat )< 0 .3V) Reduces conduction losses and optimizes system efficiency.
• Temperature adaptability : Maintains stable performance across the entire temperature range (-55°C to 150°C), making it suitable for harsh environments.

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About Jiaxun Electronics

Guangdong Jiaxun Electronics is dedicated to delivering high‑performance semiconductor solutions, with products spanning power devices and driver ICs, widely used in consumer electronics, industrial control, and the new energy sector. Thanks to its exceptional cost‑effectiveness and reliability, the STR1550 has become the preferred choice in the LED driver market.

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STR1550—Empowering high-performance design to help you master high-pressure challenges!