BC557 Transistor Explained / Description: BC557 is a widely used PNP bipolar junction transistor manufactured in small TO-92 package. << BC557 transistor is a PNP bipolar junction general-purpose transistor that is used as a switch or amplifier in electronic circuits. /Resources 26 0 R 12 0 obj /Type /Page /CropBox [0.0 0.0 612.36 792.432] BC157, BC558, 2N3906, 2SA1943, BD140, S8550, TIP127, TIP42, BC557 is a PNP transistor hence the collector and emitter will be closed (Forward biased) when the base pin is held at ground and will be opened (Reverse biased) when a signal is provided to base pin. /Contents 35 0 R /Contents 50 0 R When uses as an Amplifier the DC current gain of the Transistor can be calculated by using the below formulae, DC Current Gain = Collector Current (IC) / Base Current (IB), Your Rating 9 0 obj >> /Pages 2 0 R 2020-09-22T10:22:28+02:00 BC557 transistor has also good collector to emitter (VCE) value that is -45V, therefore you can easily use it in circuits using 40 to 45 volts DC. endobj 16 0 obj /Contents 31 0 R /S /D >> Some of the configurations used in amplifier circuits are, Of the above types common emitter type is the popular and mostly used configuration. BC 557 is an NPN transistor so its Complementary is BC547. >> When this transistor is fully biased then it can allow a maximum of 100mA to flow across the collector and emitter. /Contents 27 0 R /Parent 2 0 R /CropBox [0.0 0.0 612.36 792.432] uuid:64793dd7-38b0-49a8-a4fc-395127c3e8d0 << endobj Average /CropBox [0.0 0.0 612.36 792.432] >> Rate… << /Resources 36 0 R /Rotate 0 The temperature should be under -65 to +150 Centigrade, and always check the pinout of the transistor before placing it in By chance wrongly placed, then check the transistor again before placing it in the circuit because wrong input can weak its performance. Required fields are marked *. To bias a transistor we have to supply current to base pin, this current (IB) should be limited to 5mA. Ref. /Rotate 0 %PDF-1.4 /Contents 29 0 R /Type /Catalog endobj Keep in min the output pins of some equivalents are different So please see pinout details of the equivalent transistor before replacing in the circuit. When a transistor is used as a switch it is operated in the Saturation and Cut-Off Region as explained above. endobj All Rights Reserved. %���� 5 0 obj /Subtype /XML Where, the value of VBE should be 5V for BC557 and the Base current (IB depends on the Collector current (IC). Acrobat Distiller 7.0.5 (Windows) February 3, 2020 /MediaBox [0.0 0.0 612.36 792.432] /Kids [6 0 R 7 0 R 8 0 R 9 0 R 10 0 R 11 0 R 12 0 R 13 0 R 14 0 R] Please fill our short form and one of our friendly team members will contact you back. If you continue to use this site we will assume that you are happy with it. Anything more than 5mA will kill the Transistor; hence a resistor is always added in series with base pin. << /Contents 33 0 R /Resources 32 0 R /Rotate 0 It has 125 to 800 HFE ratings which make it an ideal transistor to use as a … /ModDate (D:20200922102228+02'00') BC557: Silicon PNP transistor in a TO-92(R) Plastic Package: Diotec Semiconductor: BC557: General Purpose PNP Transistors: First Silicon Co., Ltd: BC557: TRANSISTOR (PNP) Semtech Corporation: BC557: PNP Silicon Epitaxial Planar Transistor …

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