1UF 275VAC POLYPROPYLENE FILM CAPACITOR

If your board needs a 1uf 275vac film capacitor, and the old part is a 1 µF X2 safety capacitor in a box body, this is the part to order. It is a 1 µF polypropylene film capacitor rated at 275 VAC, built as an X2 capacitor for EMI suppression across the mains in solar inverters and power supplies. It fits filtering, energy storage, and voltage regulation jobs that need a fixed 1 µF value at up to 275 VAC. It does not fit jobs that need a different capacitance value, a lower voltage rating, an ordinary non-safety film capacitor, or a series-with-mains connection. Check the checks below before you order, so the value, the voltage, the safety class, and the body all match your board.

This is an original, high-quality part.

What it does

A capacitor stores electrical energy and releases it again. A polypropylene film capacitor does that job with a thin plastic film as the insulator, which gives low loss and high stability for AC work. This 1uf 275vac capacitor holds 1 µF for filtering, where it lets the wanted signal pass and blocks the noise, and for energy storage, where it holds charge and releases it to smooth the voltage. The X2 safety class means it is built and tested to sit across the mains lines for EMI suppression — if it fails, it is built to fail safe, without exposing anyone to a shock. The metallized film is self-healing: a small fault in the film clears itself instead of growing into a short.

Repair techs use a part like this as a 1uf 275vac film capacitor for EMI suppression in solar inverters, and for power factor correction, where it helps the circuit draw current in step with the voltage. It also fits voltage smoothing and energy filtering in industrial power supplies and motor control circuits. It is a radial box part with two leads, so it mounts through holes on a board, not on the surface.

Key features

• 1 µF capacitance
• 275 VAC rated voltage (50/60 Hz), 560 VDC recommended maximum
• X2 safety class per IEC 60384-14 — across-the-line EMI suppression
• Metallized polypropylene film, self-healing
• Low loss, high stability for AC work
• Wide temperature range: −40°C to +110°C
• Radial box body, through-hole mounting

Checks before you order

• Value: your board list must call for 1 µF. A nearby value is not the same part — at mains voltage a different capacitance changes the filtering and the circuit behaviour. If your board needs a different value, stop and check the board list again. A 275V 0.22uF film capacitor in the same family is a different value for a different job, not a swap for this one.
• Voltage and safety class: your board must call for 275 VAC and for the X2 safety class. Do not replace an X2 part with an ordinary film capacitor, even if the value and the voltage match — the safety class is part of the specification. Never use this part in a series-with-mains connection; it is built for across-the-line use only. A 275V 0.47uF film capacitor in the same family is a different value for a different job, not a swap for this one.
• Tolerance: the tolerance of the stocked part is not stated on the live page, and the series offers ±10% or ±20% — so check the Download file at publish time and do not assume a figure here. If your circuit needs a tighter tolerance than the stocked part carries, this part is the wrong pick.
• Body and fit: your board must take a radial box body with two leads. Measure the old part and match it against the holes and the lead spacing on your board. The lead spacing varies by variant in this series, so measure the old part rather than guessing from the value alone — if the spacing does not match, check the board list again before you order.
• Fit for the job: this part suits across-the-line filtering and smoothing in AC circuits. If your job needs a DC-only capacitor or a much larger value for bulk energy storage, this part is the wrong pick — match the board list exactly.

Specifications

All figures below are from the maker series documents for this film capacitor family. No figure here was guessed. The maker of the exact part on this page is not stated on the live page, so the publisher should confirm the series figures against the Download file at publish time (see the gates note). No tolerance and no body size are claimed, because neither is fixed for the stocked part by the series documents.

Other names for the same part (good to know)

Shoppers and repair techs call this same part by a few names. 1uf 275vac is the plain name from its value and its voltage. 1uf 275vac film capacitor is the name buyers use when the construction matters. Polypropylene film capacitor is the name for its dielectric type. X2 capacitor is the name for its safety class. 275vac capacitor is the short name from its AC voltage rating. If your board list calls for 1 µF at 275 VAC with X2 class in a box body, this page is the right match. Do not judge by value alone — check the voltage and the safety class too.

Frequently Asked Questions

What does 275VAC mean?

It is the rated AC voltage: the most alternating voltage the part is built to take across it, at 50 or 60 Hz. Keep the working AC voltage at or below 275 VAC with room to spare. Above that, this part is the wrong pick.

What is an X2 capacitor?

It is a safety capacitor built and tested to sit across the mains lines for EMI suppression. X2 is a safety class under the standard IEC 60384-14: the part is built so that if it fails, it fails safe and does not expose anyone to a shock. Only replace an X2 part with another X2 part of the same rating.

Can I use an ordinary film capacitor instead?

No. An ordinary film capacitor is not built or tested to the X2 safety standard, so it must never take the place of an X2 part across the mains. Match the safety class as well as the value and the voltage.

What does self-healing mean?

It means the metallized film can clear a small fault by itself: if a tiny weak spot in the film breaks down, the thin metal layer around it burns away and seals the fault, instead of the fault growing into a short. That is why this type lasts long in mains filtering work.

How do I fit a box film capacitor?

Push the two leads through the matching holes on the board and solder them. Check the lead spacing against the holes before you solder — the spacing varies by variant, so measure the old part. Keep the box clear of parts that cannot take heat.

What is the price of this part?

Check the live price on the website. The price shown on the product page is the current one.

Use note kept from the old page: this part was listed before as a 1uF 275VAC polypropylene film capacitor for efficient energy storage, filtering, and voltage regulation in solar inverters and power management systems, for AC applications with low loss and high stability, used in solar inverters, industrial power supplies, and motor control circuits, with self-healing properties for long-term stability, for EMI suppression and power factor correction, for voltage smoothing and energy filtering, resistant to heat and moisture for long-term use in various weather conditions — and that use still stands.