Product Overview
Ceramic Disc Capacitor - 220pF, 1000V DC, marked 221 1KV
Condition
New old stock, unused. The photo shows a representative unit from our stock: a blue lens-shaped disc printed 221 over 1KV, on two straight bright leads running roughly 28 mm against the millimetre scale in the frame. No manufacturer mark is visible in these photos. Same or next business day shipping from our Idaho warehouse. Honest pricing, no nonsense. Online since 1999. We are here for our customers, with a no-hassle satisfaction guarantee.
Product Overview
This is a high-voltage leaded ceramic disc capacitor: 220 picofarads at 1000 volts DC, in the small blue disc body that has been the standard cheap 1 kV part in tube audio, ignition, snubber and high-voltage supply work for decades. The value is printed as the EIA three-digit code 221, which is 22 followed by one zero, so 220 pF and not 221 pF. We have 80 of these on the shelf, sold each.
Key Features
- Capacitance: 220 pF (0.00022 uF), read from the printed EIA code 221
- Rated voltage: 1000 V DC, printed on the body as 1KV
- Body: ceramic disc, blue coating, roughly 5 mm across the disc measured against the in-frame millimetre scale
- Leads: two straight radial leads, roughly 28 mm long as photographed, bright in color
- Mounting: through-hole, radial
- Tolerance, dielectric class and temperature range: not printed on the body and not established - we do not publish figures we cannot support
- No manufacturer, series or ordering number is visible in these photos, so there is no datasheet to point you at. Order against the marking itself: 221 over 1KV.
Applications
- Coupling and snubbing in tube audio and guitar amplifier circuits
- High-voltage supply filtering where a small picofarad value is wanted
- Timing and tank circuits that need headroom well above the working voltage
- Repair and restoration where the original part was a 1 kV disc of this size
Frequently Asked Questions
How many should I order? Order the count your build needs plus a couple for the bench, since these are small enough to lose and cheap enough to keep spares of. There are 80 on the shelf, so a repair quantity or a small production run are both covered from stock today. Shipping is $8 flat rate and free on orders over $28, so small parts like this ship smartest as part of a larger order.
Is 221 the same as 221 pF? No, and it is the most common mistake with this marking. 221 is the EIA three-digit code: the first two digits are the significant figures and the third is the number of zeros, so 221 is 22 followed by one zero, or 220 pF. A part actually rated 221 pF would be an odd value and would normally be printed as 221J or similar with a tolerance letter. Nothing else is visible on the photographed face beyond 221 and 1KV.
A 5 mm blue disc with 28 mm of lead on it is mostly lead, which is exactly what you want when it has to stand off a 1 kV node.
