Vrt comparison table for semiconductors from a to z edition. See all 2 formats and editions hide other formats and editions. Suitable for applications requiring low noise and good hfe linearity, eg. Transistor faults, testing and replacement it is a common belief that valves are unreliable and that transistors last forever. Uk vintage radio repair and restoration transistor faults. Transistor substitution desoldering and replacing a transistor takes very little time. Overview bf494 npn medium frequency transistor international shipping starts from usd.
Npn medium frequency transistor bf199 limiting values in accordance with the absolute maximum rating system iec 604. Aug 25, 2011 crossreferences are not magic, understanding of the circuit and a parametric search of the important parameters is much more reliable. More time is spent figuring out which one to replace and, sometimes, what to replace it with. Without knowing its usage, you have to make sure the replacement transistor meets or exceeds every spec, since you dont know which ones the circuit relies on. Full text of national databooks 1982 national transistors databook see other formats. Bf195 equivalent datasheet, cross reference, circuit and application notes in pdf. Understanding transistor replacement, substitution and. Pnp b772 transistor replacement electrical engineering. I during 80s and 90s, i used to search for components equivalents in books. Cross reference universal transistor reference page 1. Of course, after 40 plus years of life, most electrolytic capacitors are suspect and the carboncomposition resistors have drifted high and sometimes become very noisy. In pure condition semiconductor is generally non conductor. I keep looking for equivalent transistors, and sometimes find a website that gives a list equivalent transistor.
So called equivalent parts, or nte replacements, may not work at all in some cases, because they were worse in some spec, or the circuit was designed with the assumptions that the part had a fairly low bandwidth. The transistor type is determined by the test that produces pairs of results. Bf194 and bf195 transistors can work well in this circuit. Transistor mounted on a printedcircuit board, maximum lead length 4 mm, mounting pad for collector lead minimum 10. Bf450 pnp medium frequency transistor book, halfpage m3d186. Bc516 equivalent bf195 equivalent bf195 bf194 bf197 2n4996. If you install the wrong polarity, the sandwich wont work.
International transistor equivalents guide bernard babani. Ecg transistor replacement guide book free 2sb337 transistor. Everyday low prices and free delivery on eligible orders. Understanding transistor replacement, substitution and information is very important for a electronic repairer. Dec 31, 2018 bf195 datasheet pdf vcbo30v, npn transistor, bf195 pdf, bf195 pinout, equivalent, replacement, bf195 schematic, bf195 manual, data. Semiconductor transistor, diode, ic cross reference. It is a blog created to share various information with you in more complete and detailed contents. Two transistor electronic projects american radio history.
Bf245c handbook, halfpage vds v id ma 30 0 02010 mbh554 20 10 vgs 0 v. Allieds handbook of transistor fundamentals author. If more than a maximum voltage rating is applied to a transistor, it can be permanently damaged. Bf495 datasheet, equivalent, cross reference search. Transistor equivalent or substitute used for power amplifier. Semiconductor cross reference book paperback july, 1996.
Bf245c package outline unit a outline references version european projection issue date iec jedec jeita mm 5. Npn medium frequency transistor bf199 package outline unit a outline references version european projection issue date iec jedec jeita mm 5. Pnp medium frequency transistor bf450 limiting values in accordance with the absolute maximum rating system iec 604. Substitute with the correct part number, the equipment will work for a long time and sometimes the substitute transistor will even work better than the original part number. Im trying to update as much information as possible, even if i can not find perfect information. Finding transistor replacement can take you hours if you dont know the right method to do it. Bf199 npn medium frequency transistor dbook, halfpage m3d186.
Invention of transistor was done by great american scientist mr. Unit icbo collector cutoff current ie 0 for bf 457 for bf 458 for bf 459 vcb 100 v vcb 200 v vcb 250 v 50 50 50 na na na vbrceo collectoremitter breakdown voltage ib 0 ic10ma for bf 457. Discrete semiconductors data sheet book, halfpage m3d186 bf494. Tube bf 195 or rohre bf195 id33700, transistor, wires and rfifstage shown. The generalpurpose range of transistors is a good substitute for basic noncritical audio applications, as these transistors are similar and equivalents to each other. Crossreferences are not magic, understanding of the circuit and a parametric search of the important parameters is much more reliable. Bc549c transistor the bc549c is an npn transistor belonging to a group of generalpurpose npn semiconductors consisting of bc547, bc548, and bc549.
At the maximum voltage, also called a breakdown voltage bv, electrons. Searching the right transistor for substitution is a skill, if you replace wrong specifications of transistor i. Nte is a company that specializes in cross referenced parts. Number of some that type transistors are be167, bf195, bf197. Bf195 datasheet, equivalent, cross reference search. Texas instruments transistor and diode databook 1st ed 1973 datasheets for diodes from 1n251 on and transistors from 2n117 on acrobat 7 pdf 34. Ic cross reference cross reference ci stk cross reference ci tda cross reference ci sharp cross reference hitachi audio ic cross reference and circuit applications smd cross reference and equivalent we make every effort to ensure that the material on this site is accurate, however we do not warrant or represent that the information is free. Transistors, f195, 195, 95, bf19, bf1, bf, equivalent, stock, pinout, distributor, price, schematic, inventory, databook.
Bf195 bf194 bf195 npn transistor components datasheet pdf data. Directions for determining the thermal resistance rths for cooling fins can be found on page 11. After the invention of transistor there is a treat revolution in electronics field. Bf195 transistors datasheet pdf package transistors. Bf495 npn medium frequency transistors 1997 jul 08 product. Pinning pin description 1 base 2 emitter 3 collector fig. Characteristics tamb 25 c unless otherwise specified. Lownoise aug 21, 2014 general electric transistor manual if that link goes away, you can sometimes find it for absurd. Application note an01 transistor testing once you know the type of transitor that you are testing, it is a simple matter to determine which lead is which, based on the measured voltages. The bc548 is an example of the modern lowcost member of this family, still in a throughhole package, while the bc848 is the surfacemount version. Searching the right transistor for substitution is a skill, if you replace wrong specifications of transistor into the equipment. Bf195 datasheet pdf vcbo30v, npn transistor, bf195 pdf, bf195 pinout, equivalent, replacement, bf195 schematic, bf195 manual, data. But the reliability and failure modes of vintage transistors is interesting, and is the subject of this article.
Buy international transistor equivalents guide bernard babani publishing radio and electronics books by michaels, adrian isbn. Bc516 equivalent bf195 equivalent bf195 bf194 bf197 2n4996 transistor bf194 2n918 plastic bf595 text. One of my interests is restoring vintage transistor radios. Applications output stage of a vision if amplifier. I want to share this experience and information with each other to create a blog that helps each other. We can find the equivalent number of any transistor from equivalent book or transistor. Knowing how to substitute an alternate transistor type can speed up your.
Transistors of one make may not have an exact equivalent in another. The bc549c is an npn transistor belonging to a group of generalpurpose npn semiconductors consisting of bc547, bc548, and bc549. If a mica insulation is used, the thermal resistance of the mica washer must be added, which amounts to about 0. Is there any webbased or stand alone program to do such service for transistors and ics. Unit vcbo collectorbase voltage open emitter bf469. Bf495 npn medium frequency transistors 1997 jul 08 product specification supersedes data of september 1994 file under discrete semiconductors, sc04 philips semiconductors product specification npn medium frequency transistors bf494. Vrt comparison table for semiconductors from a to z. Since the distribution of heat in the transistor crystal is not uniform and depends on voltage and. Uk vintage radio repair and restoration transistor. Bf195 datasheet pdf vcbo30v, npn transistor datasheetcafe. In fact valves are nowhere near as unreliable as people think repairers would often claim a valve had failed and charge for it to cover the cost of the time spent finding and replacing a couple of faulty capacitors. It transistor is totally an electronic device which is generally made of semiconductor materials germanium or silicon. These transistors are utilised in audio frequency, and small signal directly coupled preamplifiers.1384 478 548 23 212 46 699 648 1094 260 499 314 1481 1443 470 142 81 163 612 1142 492 1465 1263 494 735 947 1351 1015 127 576 139 74 217 1585 85 1413 753 974 637 127 513 1073 976 835 104 545 771