BF451 replacement

[Wawavoun]

Hello there

Any idea for an easy to find replacement for BF451 transistor ?

Case TO92
PNP
Ic 25 mA
VCE - VBE 40 V
Hfe 30-90
F 350 MHz

Thanks.
Philippe

[strawberry]

ft 320MHz Vce 45V BC557B https://www.digikey.com/en/products/detail/onsemi/BC557BTF/975577

[Wawavoun]

Thank you !

I even think I have that in the workshop... 

[Jacon]

It depends - BF451 was a HF transistor - it has Ccb = 0.32pF typ.
BC5XY are universal transistors, with Ccb almost 20x larger !!!

So - what is the use case for it?

[Wawavoun]

It is for mixing sync pulses and video signal.
BF451 for sync pulses and 2N2219 for video signal.

[mariush]

If the voltages are under 30v , NTE2401 maybe ? https://www.digikey.com/en/products/detail/nte-electronics-inc/NTE2401/11652069

Not to-92, but soldering 3 copper leads to the terminals would not be hard.

[strawberry]

used in many TV sets KSA1015 Cob 2pF https://eu.mouser.com/ProductDetail/onsemi-Fairchild/KSA1015YTA?qs=ljbEvF4DwOP4wK7PS53%252BtA%3D%3D