BC548B DATASHEET PDF

Note: Complete Technical Details can be found at the BC transistor datasheet give at the end of this page. BC is a NPN transistor so the collector and emitter will be left open Reverse biased when the base pin is held at ground and will be closed Forward biased when a signal is provided to base pin. BC has a gain value of to , this value determines the amplification capacity of the transistor. The maximum amount of current that could flow through the Collector pin is mA, hence we cannot connect loads that consume more than mA using this transistor. To bias a transistor we have to supply current to base pin, this current I B should be limited to 5mA.

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It is notably often the first type of bipolar transistor hobbyists encounter and is often featured in designs in hobby electronics magazines where a general-purpose transistor is required. The BC is supplied in a standard TO 3-pin package. The assignment of transistor elements b,c,e to leads, i. As viewed in the top-right image, going from left to right, the pinout is as follows:.

Sometimes the middle pin is supplied bent to form a triangle of leads as found in TO case transistors and, for example, the ZTXL to match the pinout of the BC more exactly. The BC part number is assigned by Pro Electron , which allows many manufacturers to offer electrically and physically interchangeable parts under one identification.

Devices registered to this Pro Electron number must have the following minimum performance characteristics: [9]. This group of NPN transistors share many specifications and characteristic curves, but differ in voltage ratings - the BC and BC are essentially the same as the BC but selected with higher breakdown voltages , while the BC is a low noise version, and the BC is both high-voltage and low-noise.

See the BC family for a table of these differences, and comparisons with predecessor types. Some manufacturers specify their parts with higher ratings, for example the Fairchild datasheet ABC, Rev B for the BC, sourced from Process 10 gave mA as the maximum collector current, while their datasheets dated have dropped the current rating to the standard mA. There is lot of variation in the ft-transition maximum frequency from manufacturer to manufacturer.

The type number of any of the devices in this "family" may be followed by a letter, "A" to "C", indicating devices that have been selected that fall within a narrow range of gain h FE. The same letters are used for this purpose in several other European transistors, and is similar in principle to the "Yellow", "Blue" and so on gain groupings in Japanese transistors, but should not be confused with the "A" suffix used with some American JEDEC devices, such as the 2NA, to indicate a variety of differences or enhancements over the base type.

So a BC might have a current gain anywhere between and , but the gain of a BCA would be within the range of to Notes: Some manufacturers place slightly different limits on the gain groups, for example the "B" group has been quoted as in a Philips datasheet.

From Wikipedia, the free encyclopedia. This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Braga Electronics For Dummies. Digital Designs. Retrieved 28 June On Semiconductor. Retrieved 8 March Retrieved 28 March Fairchild Semiconductor. Categories : Commercial transistors Bipolar transistors.

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