Product Overview
Pilkor WK9611 Class X2 Safety Capacitor, 1uF at 275V AC, for Mains EMI Filtering
Condition
New and unused. The photographed piece is a blue molded box case with the marking still crisp on one narrow end: 1u M 275V~ X2 on the upper line and PILKOR WK9611 below it. The case carries light cosmetic marks from handling and shelf time - faint dark scuff lines and a little lint on the broad faces, and light grey rub marks along one long edge. Both radial leads are full length, straight, and bright, with no solder, flux, or trim marks on them. Against the ruler in the last photo the body measures roughly 32 mm wide by 24 mm tall, with the leads on a wide radial spacing of about 27 mm. Sold each; the piece shown is representative of stock, and markings and surface marks vary slightly from one to the next.
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Product Overview
The Pilkor WK9611 is a Class X2 safety capacitor built for across-the-line EMI and RFI suppression on AC mains. X2 is the safety class defined under IEC 60384-14 for capacitors connected line to line, where the part is expected to fail open rather than short if it is stressed past its limit - that is the whole reason a filter capacitor gets a class marking instead of just a voltage. This piece is the 1uF value at 275V AC with an M tolerance code, read directly off the case, in a molded rectangular box with long radial leads for through-hole mounting. It is the shape and pitch that appliance boards and switching supply inlets were laid out around, and it is the part people go hunting for when an original blue box capacitor in an old chassis has aged out.
Key Features
- Marked value: 1uF (case reads 1u)
- Tolerance code: M
- Voltage rating: 275V AC (case reads 275V~)
- Safety class: X2, the across-the-line class of IEC 60384-14
- Manufacturer marking: PILKOR WK9611
- Construction: molded blue box case, film type
- Leads: two radial leads, full length, untrimmed
- Body approximately 32 mm wide by 24 mm tall against the ruler; lead spacing approximately 27 mm
- Dielectric material, temperature range, climatic category, and agency approvals: not confirmed - verify against the datasheet before use
Applications
- Appliance repair tech replacing an aged across-the-line suppression capacitor in a washer or dryer control board
- Power supply builder filtering conducted noise at a switch-mode inlet stage
- Vintage audio restorer swapping out a tired mains filter capacitor on a line inlet, matching the X2 class rather than substituting a general-purpose film part
- Industrial maintenance electrician rebuilding an RFI filter block on legacy machine control gear
Frequently Asked Questions
What exactly is printed on this capacitor?
Two lines on one narrow end of the case: 1u, an M tolerance code, 275V~ and X2 on the top line, and PILKOR WK9611 underneath. The third photo shows that face straight on so you can read it yourself before you buy.
Can I use it to replace a failed X2 in a mains filter?
That is the class it was built for - X2 capacitors go line to line on AC mains. Match the capacitance, the AC voltage rating, and the class to whatever came out, and check the lead pitch and body size against your board before you order. Anything the case does not state is not confirmed here.
Why does this listing not repeat the dielectric type and agency approvals?
Because we cannot see them. The older copy carried a family spec block - a capacitance range, a climatic category, a temperature range, and VDE, UL and CSA marks - that none of these photos support and that we cannot confirm on the piece in hand. We took it out rather than leave a spec we could not stand behind. What the case says is what we say.
Are the leads really unused?
They are. Both leads run full length, straight, and bright, with no solder, flux, or trim marks anywhere on them, and you can see that in the first, second, and fourth photos - the angled view, the flat face view, and the ruler shot. The third photo is an end-on close-up of the marked face, so no lead is in that frame. The only marks on the part are cosmetic ones on the plastic case. An earlier version of this listing was graded used; that was a mistake in our own records, and it has been corrected to new and unused.
It is new but sold untested - what am I actually getting?
One Pilkor WK9611 capacitor, sold each, in the new and unused condition described above. We do not test capacitance, dissipation, or insulation resistance here, so the photos and the case marking are the spec: 1uF, M tolerance, 275V~, Class X2. Unused is not the same as measured, and a film capacitor that has been on a shelf for years deserves the courtesy of a meter, so confirm the value before it goes into a live circuit across the mains, and never substitute a lower class. What you get in exchange for taking that on is a specific, photographed piece whose markings you can read before you buy, rather than an unmarked salvage part with the leads already cut short. Shipping is $8 flat rate and free once your order passes $28, and orders leave our Idaho warehouse the same or next business day.
An X2 spends its whole working life across the mains, quietly swallowing the noise nobody wants to hear about, and the only thanks it gets is being replaced. Match the 1u and the 275V~ stamped on this blue case, and it will go back to doing exactly that in your chassis.
