Hi,
I am currently servicing a Wayne Kerr B605 LCR bridge (from the 80s or early 90s) I bought off ebay, and want to replace a couple of failing 10uF 25V axial capacitors with some very long life (5000h minimum) replacements. There seems to be very little choice when it comes to new electrolytics, eg Vishay AHT series which are expensive (£2 each including VAT).
I've read and seen Dave's video (eevblog #33) about modern multilayer ceramic caps which now go up to 10uF 25V and beyond. I guess these have extremely long life but I can't find a number. I see Mouser sell a wide range, but am now confused about which one to go for. For example TDK offer FG and FK series (about 40p to 50p each so much cheaper), but I don't know what the electrical pros and cons are between different series or brands., so please can anyone enlighten me? The application is filtering DC rails so should be little ripple current, so would any type with enough voltage headroom be fine?
Regards,
John
PS Just found Vishay RLL series, 5000h @ 85C and 200,000h @ 40C - and Arrow currently doing free shipping. Still interested in ceramic caps as I have no clue about them and welcome some comments.