Pinout

SS8050D331 PDF – 25V, 1500mA, NPN Transistor

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Part Number: SS8050D331

Function: 25V, 1500mA, NPN Transistor

Package: TO-92 Type

Manufacturer: YS Semicondcutor

Images:SS8050D331 pdf pinout

Description

SS8050D331 is 25V, 1.5A, NPN Transistor. This is a general-purpose NPN bipolar junction transistor (BJT) designed for medium-current amplification and switching applications. With a relatively high collector current capability for a TO-92 package, it is widely used in driver stages, low-power switching, and signal amplification circuits.

Features

  • NPN silicon transistor
  • High collector current capability (up to 1.5A)
  • Low saturation voltage (VCE(sat))
  • Good DC current gain (hFE) characteristics
  • Compact TO-92 package
  • Suitable for switching and amplification

SS8050D331 datasheet transistor

Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage: Vcbo = 40 V

2. Collector to Emitter Voltage: Vceo = 25 V

3. Emitter to Base Voltage: Vebo = 5 V

4. Collector Current: Ic = 1500 mA

5. Collector Dissipation : Pc = 1 W

6. Junction Temperature: Tj = 150°C

7. Storage Temperature: Tsg = -55 ~ +150°C

Typical Circuit Usage

  • Low-side switch (relay, LED, buzzer)
  • Signal amplification stage
  • Driver transistor for MOSFET or higher power stage
  • Audio pre-amplifier (low power)

How to Choose This Part

  • Use when moderate current (<1A practical) is required in a compact package
  • Good choice for cost-sensitive designs
  • Prefer TO-220 devices if continuous current >1A is required
  • Consider MOSFET alternatives for higher efficiency switching

Applications

  • Consumer electronics
  • Power switching circuits
  • Relay drivers
  • Embedded control systems
  • General-purpose amplification

Alternative / Equivalent Products

  • S8050 / SS8050 (generic variants)
  • 2N2222 (lower current alternative)
  • PN2222A
  • BC337
  • BD139 (higher power alternative, TO-126)

SS8050D331 PDF Datasheet

SS8050D331 pdf

SS8050 Similar features and reference parts

SS8050 PDF 

STR-A6251 Datasheet – Flyback Switching Regulator

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Part Number: STR-A6251

Function: PWM-topology off-line secondary-feedback switching regulator IC

Package: DIP 8 Pin Type

Manufacturer: Allegro MicroSystems, Sanken

Images:

STR-A6251 datasheet

 

Description

The STR-A6251 and STR-A6252 are 50 kHz PWM topology (with ±5% frequency jittering for minimum EMI) regulators specifically designed to satisfy the requirements for increased integration and reliability in flyback converters. They incorporate a primary control and drive circuit with avalanche-rated power MOSFETs.

The STR-A6252 features higher allowable switching current and lower on-resistance.
The STRA6251 is also available for 67 kHz operation. Covering the power range from below 21 watts or 24 watts for a 230 VAC input, or to 15 or 20 watts for a universal (85 to 264 VAC) input, these devices can be used in a wide range of applications, from DVD players and VCR player/recorders to ac adapters for cellular phones and digital cameras. An auto-burst standby function reduces power consumption at light load, while multiple protections, including the avalanche-energy guaranteed MOSFET, provide high reliability of system design.

Pinouts

STR-A6251 pinout

 

 

Features

1. Start-up circuit

Thanks to the proprietary 900V BCD process, the built-in startup circuit connected to the internal MOSFET drain reduces both the discrete component count and the power consumption.

2. PWM operational frequency jittering

The frequency jittering function suppresses EMI noise and consequently reduces the EMI noise filter cost The center frequency of PWM operation is set to 50 KHz, and the frequency jittering provides variation of Δf= 5KHz (typ), which is adjustable by the external capacitor.

3. Over Load Protection (OLP) with a built-in timer (Auto restart)

Built-in delay timer circuit to trip the overload protection requires no external OLP capacitor, which allows cost reduction and space-saving.

Preview

STR-A6251 pinout datasheet

 

Applications

1.Standby power supply

2.Battery charger

3.Small power S.M.P.S

STR-A6251 Datasheet PDF

STR-A6251 pdf