Import Bcp51 — Buy in Bulk from Supplier in China

The Bcp51 from Walsoon Group Ltd. is a PNP bipolar junction transistor manufactured to Fairchild Semiconductor's original design, housed in a surface-mount SOT-223 package that suits compact PCB layouts. It carries a maximum collector-emitter voltage of 45 V and continuous collector current of 1 A, with minimum DC current gain specified at 100 when I_C = 150 mA. The device is RoHS compliant, meaning its construction excludes lead, mercury, cadmium, and other restricted substances per EU directive 2011/65/EU. Walsoon Group Ltd., based in Shenzhen, lists this part with an imported supplier tier and harbor trust designation, indicating they source through established trade channels rather than holding direct manufacturing accreditation.

The transistor uses silicon epitaxial construction with a PNP polarity, making it suitable for sourcing current from positive rails in switching and linear applications. Typical transition frequency f_T for this family sits around 100 MHz, adequate for audio-frequency amplification and moderate-speed switching. Thermal resistance from junction to ambient in the SOT-223 package is approximately 62.5 K/W with minimal copper area, so designers must account for heatsinking at sustained currents above 500 mA. The part is available in tape-and-reel packaging, standard for automated assembly, though the exact reel quantity and moisture sensitivity level should be confirmed before placing an order. Alternative equivalent parts include the BCP51-16 with tighter gain grouping if your application demands binning consistency.

Target buyers include OEMs in consumer electronics, telecommunications infrastructure, and automotive module production where through-hole replacement with surface-mount parts reduces assembly cost. The Bcp51 serves in push-pull audio output stages, low-dropout regulator pass elements, and general-purpose switching where a PNP device simplifies topology. Buyers should verify whether Walsoon Group Ltd. stocks this as active production inventory or brokered allocation, given the zero percent response rate recorded on their profile. Request the date code and factory of origin, as Fairchild's original line has transferred to ON Semiconductor, and counterfeits circulate in the open market. Confirm packing details, Incoterms, and whether the quoted parts come with full traceability documentation.

Walsoon Group Ltd. maintains registered offices in Room 1508, Suite A, China Electronics Tech, Shenzhen 518031, Guangdong Province, placing them in one of China's principal electronics component trading hubs with direct access to both manufacturing and logistics networks. Their supplier tier is marked as imported, and their trust tier is harbor, which signals they operate as a trading entity rather than a factory-authorized distributor with direct manufacturer representation. The response rate of 0.00 percent and average response time of zero hours suggest either a newly activated account or a listing that has not generated measurable inquiry traffic, so buyers should treat initial contact as unproven.

The company profile does not state factory audits, ISO certification, or exclusive distribution agreements, nor does it list employee count, annual revenue, or specific client references. What is known is their geographic concentration in Shenzhen's electronics corridor, where sourcing agents and independent distributors aggregate inventory from multiple upstream channels. Buyers engaging Walsoon Group Ltd. should verify whether they hold stock in Shenzhen warehouses or broker orders against overseas availability, and whether they can provide original manufacturer certificates of conformance. The absence of response data means due diligence falls entirely to the buyer; request company registration documents, VAT number, and prior transaction references before committing funds.