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BC857BLT1G

PNP BJT, 45V, 100mA, hFE 220, 300mW, SOT-23-3, AEC-Q101, 100MHz fT

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Manufacturer Part：

BC857BLT1G

Package：

SOT-23-3 (TO-236) 2.9 x 1.3 x 1.0 mm

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Description

Product Overview

The onsemi BC857BLT1G is a PNP general-purpose bipolar junction transistor (BJT) housed in a SOT-23-3 surface-mount package. Designed for amplifier and switching applications, it offers a collector-emitter voltage of 45 V, a continuous collector current of 100 mA, and a transition frequency of 100 MHz. The device is AEC-Q101 qualified, making it suitable for automotive applications.

Key Specifications

Transistor Type PNP
VCEO (Collector-Emitter Voltage) -45 V
VCBO (Collector-Base Voltage) -50 V
VEBO (Emitter-Base Voltage) -5.0 V
IC (Collector Current) -100 mA
VCE(sat) (Max) -650 mV @ 5 mA, 100 mA
hFE (Min) 220 @ 2 mA, 5 V
Power Dissipation 300 mW
Transition Frequency (fT) 100 MHz
Operating Temperature -55°C to +150°C (TJ)
Package SOT-23-3 (TO-236)

Features

  • AEC-Q101 qualified and PPAP capable for automotive applications
  • Low collector-emitter saturation voltage of 650 mV max
  • High DC current gain (hFE min 220) for reliable amplification
  • Wide operating temperature range from -55°C to +150°C
  • Pb-Free, Halogen Free/BFR Free, RoHS compliant
  • Compact SOT-23-3 package for high-density PCB designs

Applications

  • General-purpose amplifier circuits
  • Switching circuits in automotive electronics
  • Signal processing and conditioning
  • Current mirror and current source configurations
  • Portable and battery-powered devices

The onsemi BC857BLT1G is a PNP silicon general-purpose bipolar junction transistor designed for amplifier and switching applications. Housed in the compact SOT-23-3 surface-mount package, this device offers a maximum collector-emitter voltage of 45 V and a continuous collector current of 100 mA. With a minimum DC current gain of 220 at 2 mA and a transition frequency of 100 MHz, it is well-suited for small-signal amplification and high-speed switching. The BC857BLT1G is AEC-Q101 qualified, ensuring reliability in automotive environments. It features a low collector-emitter saturation voltage of 650 mV maximum, contributing to efficient switching performance. The device is Pb-Free, Halogen Free/BFR Free, and RoHS compliant.

The BC857BLT1G operates as a PNP bipolar junction transistor. In active mode, current flows from emitter to collector when the base is biased negative relative to the emitter. A small base current controls a larger collector current, with the gain factor hFE determining the amplification ratio (minimum 220 at 2 mA). The transistor enters saturation when both junctions are forward-biased, resulting in a low VCE(sat) of 650 mV max, making it efficient for switching applications. In cutoff mode, both junctions are reverse-biased and only minimal leakage current flows. The Schmitt-trigger-like hysteresis of the PN junctions provides inherent noise immunity.

Pin Name Type Function
1 Base Input Base terminal — controls transistor conduction
2 Emitter Power Emitter terminal — current source in PNP operation
3 Collector Output Collector terminal — current sink in active mode
  • General-purpose audio and signal amplification in consumer electronics
  • Low-power switching circuits in portable devices
  • Automotive control modules requiring AEC-Q101 qualification
  • Current mirror and differential pair configurations in analog front-ends
  • Load switching and driver circuits in industrial control systems
Manufacturer Part Number Package Notes
Taiwan Semiconductor BC857B RFG SOT-23-3 Pin-to-pin compatible
Nexperia BC857B,215 SOT-23 Equivalent specifications
Infineon BC857B E6327 SOT-23 Pin-to-pin compatible
ROHM BC857BRA SOT-23-3 Equivalent function
onsemi BC857BLT3G SOT-23-3 Tape & Reel alternate packaging
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

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We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

Shipping & Payment

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

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5. Local Pickup in Shenzhen

Local pickup service is available for customers in Shenzhen and surrounding areas:
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Contact Information

Email: info@ic-vendor.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

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  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

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We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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