2017年5月15日 · A BC107 was an old ordinary little transistor in a metal case. Its max Vceo is 45V, its max current is only 100mA and its hFE is from 125 to 500 at 2mA. A BC547 has the same chip but in a modern epoxy case and its allowed thermal power is double the BC107. I have used 2N3904 little transistors to replace BC547 in circuits for many years.

2021年10月25日 · Good morning all. Wonder if anyone could help in advising 2 equivalent transistors to replace a NPN BC107A package type TO-18 and PNP BC327B package type TO-92. I have been using these devices for a while but going more and more surfaces mount and these are probably the last components I need to...

2011年7月30日 · Philips invented the BC107 in a metal case then made the BC547 in a plastic case. Fairchild simply copies it. The max emitter-base voltage is 7V because it is a reverse voltage. Transistors usually have the base-emitter with a forward voltage, not a reverse voltage.

2013年10月4日 · Unfortunately I think I blew the temp control circuit, thinking it was just 2 wires to the heater I bunged 60 v up it, but its made from bc107's and a bfy51 so shouldnt be hard to sort. Attachments Oven.jpg

2013年5月20日 · I know these all transistors has different hFE: 547 547A 547B 547C And this different hFE may affect the bias on critical circuitry. I have few transistors but can't read its value correctly which is confusing me!

2022年7月9日 · I know there is a great deal of poor schematics available but I have been doing a good deal of research before i settled on this one to build from. So I found a 12 year old article from EEWeb showcasing a D2D switch using a popular (They say) ORP12 LDR. I do not have that LDR. what I have is a...

2012年11月21日 · I put the current sense resistor in the low side, from the - of the load to true ground, connected the sense resistor to the current limit trans within the chip, and paralled this with the bc107 limit led trans, the collector of the bc107 goes through a resistor and led to the supply as you suggested.

2009年10月20日 · It also depends on how much specific this transistor is to your circuit requirement.BC148 is used for small signal general purpose amplification.There are a lot with same configuration .You may go for 2n222,bc107 etc...

2016年7月7日 · Hello I am thinking of building the below circuit but i am short on components. I have all the others except SL100 transistor and BT44 triac which i can't seem to find in any local store. If anyone can tell me what alternative components i can use for these two then please let me know i would...

2020年3月11日 · hello, first of all sorry if i did post my problem in the wrong place..im trying to repair an old german rc radio the grundig varioprop 12S ( yellow one) i have already opened the radio and replaced the transistor t101 the one wich is connected to the 27mhz cristal quartz because when i bought it that transistor was missing i put 2N2222 instead .