How to Record X and Y Class Entries in a Surplus Capacitor Enquiry

1. Retain the Exact Code and Observed Marking

Preserve the characters actually readable on the component and its pack, including any incomplete marking. Record a supported full manufacturer code separately from a shortened marking or internal purchasing reference. An interpretation should remain traceable to the original reading, so a reviewer can see whether the class description comes from the item or another record.

Describe the capacitor being supplied before assigning a class. Keep a loose component separate from a populated board, and retain the supported product construction where known. A film or ceramic description alone is insufficient to assign an X or Y entry. The identification record needs the exact manufacturer reference that supports the proposed classification.

Reconcile a pack code with the units it describes rather than assuming every item in a container carries that identity. If material was mixed, repacked or removed from equipment, disclose the known relationship between markings and records. Do not resolve missing characters by selecting a nearby catalogue code merely because its family name is familiar.

2. Match Identity to the Manufacturer's Class Table

Murata's Safety Certificates by Series table separates Series, Type, Part number and Class. Its GA3 entries illustrate why the series name is insufficient: Type GB has an X2 class entry, while Type GF has an X1/Y2 entry. These are examples from the manufacturer's table, not identifications of a seller's stock.

Match the actual supported code to the relevant type and part-number pattern before copying a class. Preserve the row reference and retrieval date alongside the interpretation. If the exact code cannot be reconciled with the pattern, record that mismatch instead of treating another type in the same series as a substitute identity.

A pattern containing wildcard characters describes the manufacturer's grouping; it is not the complete code of the offered component. Keep the actual identifier visible and retain whichever elements remain unreadable. A pattern match is a documentation step, rather than evidence that all physical items in a mixed container have been identified.

Retain the class text as a linked classification field instead of reducing the row to a generic safety-capacitor label. This enquiry does not define mains connection rules, supply voltage thresholds or use permissions for X and Y classes. Those questions require their own applicable product and application review beyond recording the table's identity information.

3. Keep Class Metadata Separate from Certificate and Lot Evidence

Distinguish three evidence questions: what the table says about a product, what a particular certificate file covers, and what is known about the offered lot. A manufacturer table can lead a reviewer to further documentation. Its class column should not be relabelled as a completed certificate review or an inspection result for surplus units.

If a certificate identifier or file is supplied, preserve its reference and whether anyone has actually examined it. State when coverage, revision or validity has not been reviewed. Do not infer a current conclusion from a filename, download link or agency logo, and do not borrow a certificate assertion from another type in the series.

Keep the source history and condition of the physical material independent from the class entry. An original label, purchase record or installation reference may support identity or provenance within its stated scope. It does not show that every component remains electrically suitable, nor does it establish the coverage of a certificate that has not been read.

Attach existing inspection or other lot records only to the groups they identify. Describe their date and scope without expanding a sample result to unrelated material. This guide reports no testing, provides no energising procedure and does not determine legal compliance. Its purpose is to prevent a classification field from carrying unsupported certificate or condition claims.

4. Submit the Narrow Classification with Unresolved Fields

Build the offer around the complete supported code, manufacturer type and separately referenced class entry. Keep unknown or unmatched groups distinguishable from identified material. Avoid an unexplained certified flag covering the entire list; it conceals whether the evidence is a table match, an unread document or an actual record for particular units.

For unresolved entries, identify the specific missing evidence: unreadable marking, incomplete code, unmatched type or unreviewed certificate. State which description is an owner declaration and which is supported by a manufacturer table. A focused classification question gives the reviewer a clear next step without converting uncertainty into a claim of approval.

For an ICULTRA capacitor enquiry, provide the exact available identifiers and narrow class reference together with the lot's observed condition and documentation gaps. Ask what material the recipient can assess and what additional review is required. Acceptance and commercial terms need confirmation for the actual groups; the table does not supply a completed buyback decision.

Sources and further reading

• Murata Ceramic Capacitor Safety Certificates by Series

Murata's Safety Certificates by Series table separates series, type, part-number pattern and class. This guide uses those identity fields only; the linked certificate files have not been reviewed for validity or coverage.