S8050


NPN transistor, 25V, 500mA, hFE 85-400, 150MHz, TO-92/SOT-23

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Manufacturer Part:

S8050

Package:

TO-92 (5.2 x 4.2 mm) / SOT-23 (2.9 x 1.3 mm)

Brand:
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Description

Product Overview

The S8050 is a general-purpose NPN silicon transistor rated at 25V VCEO and 500mA collector current with 150MHz transition frequency. Available in TO-92 and SOT-23 packages, it is widely used in low-power amplification and switching in consumer electronics, with complementary PNP type S8550.

Key Specifications

Transistor Type NPN
VCEO (Max) 25V
VCBO (Max) 40V
IC (Max) 500mA
hFE (Range) 85 ~ 400 (rank dependent)
VCE(sat) Max 0.6V @ 500mA, 50mA
fT 150MHz
Power Dissipation 625mW (TO-92) / 300mW (SOT-23)

Features

  • Complementary to S8550 (PNP)
  • 500mA collector current capability
  • Multiple hFE rank options (B, D, D3)
  • Available in TO-92 and SOT-23 packages
  • Low cost, widely sourced

Applications

  • Small-signal audio amplification
  • LED and buzzer driver circuits
  • Low-power switching in consumer electronics
  • Push-pull amplifier with S8550 complement
  • Motor and relay driver in toys and appliances

The S8050 is one of the most widely used general-purpose NPN transistors in consumer electronics, offering 25V collector-emitter voltage and 500mA continuous collector current. It is the complementary NPN pair to the S8550 PNP transistor, enabling push-pull and class-AB amplifier designs. Available in both through-hole TO-92 and surface-mount SOT-23 packages, the S8050 comes in multiple hFE ranks (B: 85-160, D: 160-300, D3: 300-400) to match application requirements. Its low cost and universal availability make it a go-to choice for low-power amplification and switching in toys, appliances, and consumer gadgets.

The S8050 is an NPN bipolar junction transistor using epitaxial planar silicon construction. Current flow from collector to emitter is controlled by the base current multiplied by the DC current gain (hFE). In the active region, the transistor amplifies signals with gain determined by the hFE rank (85-400). In saturation mode, VCE drops below 0.6V at 500mA, enabling efficient switching. The 150MHz transition frequency provides adequate bandwidth for audio and low-frequency RF applications. Paired with the complementary S8550 PNP transistor, it forms the basis for class-B and class-AB push-pull output stages.

Pin (TO-92) Pin (SOT-23) Name Type Function
1 1 Emitter Output Emitter terminal
2 2 Base Input Base control terminal
3 3 Collector Output Collector terminal
  • Small-signal audio preamplifier stages
  • LED, buzzer, and small relay driver
  • Push-pull audio output with S8550 complement
  • Toy and appliance motor speed control
  • General-purpose switching in consumer electronics
Manufacturer Part Number Package Notes
Various S8550 TO-92/SOT-23 Complementary PNP type
onsemi MMBT3904LT1G SOT-23 NPN, 40V, 200mA, 300MHz
Various 2N3904 TO-92 NPN, 40V, 200mA, through-hole
onsemi MMBTA05LT1G SOT-23 NPN, 60V, 500mA
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Quality Assurance

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.