C458 transistor replacement The guys who have given you advice earlier in this thread know what they're doing. The transistor is designed for use in low-frequency amplifiers, but it can also be utilized in a wide range of other applications. the 2SC458-B might only be marked "C458-B". Replacement and Equivalent for 2SC458 transistor. 1 A Max. I was planning to replace them, but if I can just drop in an upgraded part without having to change anything else, I'm all for that. (On-Semi bought Fairchild a couple years ago). See the attached picture showing the measured noise power density on an AKAI deck for the PB circuit alone (tape not running) and total noise with tape (Maxell UD35 Oct 22, 2020 · Thanks for all the replies. . 2SC458D Datasheet and Replacement Type Designator: 2SC458D Material of Transistor: Si Polarity: NPN Maximum Collector Power Dissipation (Pc): 0. Replacement and Equivalent for 2SC458-C transistor. Description: Silicon NPN Epitaxial. These show up under the discrete BJT category as they are mostly used like single transistor device, just much higher gain than what you’d get Oct 26, 2014 · A good substitution needs more than part numbers and their datasheets to decide whether they will perform similarly in an application. The 2SC458-D transistor can have a current gain of 250 to 500. the 2SC458-D might only be marked "C458-D". Nov 26, 2021 · These transistors have very high gain, when compared to most non-Darlington, single, BJT transistors… because they are two BJT transistors in series inside an otherwise single-transistor package. At the lower voltages, BC549 is good as well. Mar 13, 2017 · I will order replacement transistors for all but only replace those that need replacing. Transistor NPN PNP [46] Zener Diode [3] Schottky Diode [8] Standard Recovery Diode [7] Feb 25, 2010 · Is there a lower noise drop-in replacement for a C458 transistor? The ones in the phono pre on my Allied are horribly noisy and I'm tired of it. The 2SC458-C transistor can have a current gain of 160 to 320. Generalised descriptions like "audio driver transistor" and "low level amplifier" used for these can apply to many, even very dissimilar transistor types so you need to specify the application circuit, voltage and signal levels at least. The 2SC458 has Ic = 100 mA, hfe = 160 > 320 and ft = 230 MHz Aug 23, 2018 · I can tell you that I’ve seen multiple failure modes of this particular transistor in multiple gain groups time and time again over many many years. the 2SC458 might only be marked "C458". KSC1815YTA for 2SC458 (C) and KSC945CYTA for the 2SC458 (D). File Size: 27Kbytes. I don't know why they called the 2SC458 a low noise transistor since the noise contour map of the 2SC458 shows that it is much noisier than many transistors. And while older is still readily available, as is a 3906. Look in the stickies on this forum, and Solid State Forum for transistor cross references by the guys on here. The 2SC458-B transistor can have a current gain of 100 to 200. The KSC1845 previously suggested is perfect too. Manufacturer: Hitachi Semiconductor. One of these transistors is the 2SC458ALGC (20 of them) which is apparently known for being a bad unit. Download. Not just background noise but squealing, pegged VU meters, low gain, excessive gain, dead channels due to shorts, opens, pretty much every failure mode a transistor can have this one has exhibited time and time again. I'd take their advice. Replacement and Equivalent for 2SC458-B transistor. A while back some one recommended these as a replacement. As with any transistor higher voltage and higher current means higher noise. Jun 1, 2022 · 2 main manufacturers for replacement transistors are ON-SEMI and FAIRCHILD. Jun 6, 2021 · Well, if there was one transistor that would have worked as well as they wanted it to, they probably would have just used one type at the factory. The 2SC458 transistor is an NPN BJT transistor with a TO-92 packaging. May 23, 2021 · 2SC458 Transistor Explained / Description. The transistor is built for low frequency amplifier applications but it can also be used in wide variety of other applications. 2 W Maximum Collector-Base Voltage |Vcb|: 30 V Maximum Collector-Emitter Voltage |Vce|: 30 V Maximum Emitter-Base Voltage |Veb|: 5 V Maximum Collector Current |Ic max|: 0. Part #: 2SC458. 2SC458 is an NPN BJT transistor manufactured in TO-92 package. Thanks to all. C458 2SC4587 (TO-92) NPN 30V/100mA, General purpose Application. There may be a couple of gaps but asking questions will usually get a decent replacement number. The 2SC458 transistor can have a current gain of 100 to 500. Also from my own testing, 15v @ @2 ma, a 2n3904 is extremely low noise also. I just wanted to make sure since that thread is ages old now and verify that these will be a direct drop in replacement 2SC458 Datasheet and Replacement Type Designator: 2SC458 Material of Transistor: Si Polarity: NPN Maximum Collector Power Dissipation (Pc): 0. Because the transistor's maximum collector current is 100mA, it can also be utilized to drive a 100mA load with a load voltage of less than 30V. At least no one has found anything different. Jan 1, 2010 · Don't worry, virtually every transistors are better than the 2SC458. However I am confused at the replacement unit, KSC1845, that is suggested by many sources. Replacement and Equivalent for 2SC458-D transistor. Apr 30, 2021 · The tape noise is so much dominant over the circuit and transistor electrical noise that it doesn't really matter which transistor you choose (within reasonable limits, of course). the 2SC458-C might only be marked "C458-C". Page: 6 Pages. Feb 2, 2014 · I have a bunch of C458 transistors in my Kenwood KA-6000 amp that I need to replace. For example, the common 2SC945 is much better. ieb aaawtul lsep ydzrs abqy scyxn xhywy lxr tsu iive owjynafp kgoz awlmtc rbxwk jrdz