Ceramic capacitors

[BurningTantalum]

I found a small bag of ceramic capacitors in one of my component drawers. I have no idea where they came from.
What would their application be, and how would they be mounted/connected? The circular ones are 1.3mm thick and measure around 1n2. The trapezoid ones are labelled as 1n.

[srb1954]

I found a small bag of ceramic capacitors in one of my component drawers. I have no idea where they came from.
What would their application be, and how would they be mounted/connected? The circular ones are 1.3mm thick and measure around 1n2. The trapezoid ones are labelled as 1n.

The trapezoidal ones are designed to be wedged into a slot in a PCB and blob soldered on each side so that there is zero effective lead length and practically zero ESL.

The round ones could also be mounted in the same way but I have also seen them soldered face down onto a PCB for a very low inductance bypass capacitor with other components air-wired to the top face.

[bidrohini]

I found a small bag of ceramic capacitors in one of my component drawers. I have no idea where they came from.
What would their application be, and how would they be mounted/connected? The circular ones are 1.3mm thick and measure around 1n2. The trapezoid ones are labelled as 1n.

The trapezoidal ones are designed to be wedged into a slot in a PCB and blob soldered on each side so that there is zero effective lead length and practically zero ESL.

The round ones could also be mounted in the same way but I have also seen them soldered face down onto a PCB for a very low inductance bypass capacitor with other components air-wired to the top face.

Could you please tell us how to solder these capacitors? I cannot see any legs like usual capacitors.

[BurningTantalum]

Thanks SRB, that makes perfect sense. I guess they will go back in the drawer they came from!

[srb1954]

I found a small bag of ceramic capacitors in one of my component drawers. I have no idea where they came from.
What would their application be, and how would they be mounted/connected? The circular ones are 1.3mm thick and measure around 1n2. The trapezoid ones are labelled as 1n.

The trapezoidal ones are designed to be wedged into a slot in a PCB and blob soldered on each side so that there is zero effective lead length and practically zero ESL.

The round ones could also be mounted in the same way but I have also seen them soldered face down onto a PCB for a very low inductance bypass capacitor with other components air-wired to the top face.

Could you please tell us how to solder these capacitors? I cannot see any legs like usual capacitors.

The slot in the PCB has Cu tracks right up to the edge of the slot. A blob of solder bridges from the Cu track to the side of the capacitor.

[Alex Eisenhut]

Wow, I think Tektronix used these in the 1960s in the 1S1 and 1S2 GHz samplers. Never seen them as loose parts.

[SiliconWizard]

Nice piece of history.