How should a charger model-numbering scheme be set up so certificates and variants stay traceable?

Main answer · Wecent Editorial Team

Short answer: Use a simple structure with a base model number for the electrical design, separate suffixes for plug type and colour and a clear rule for when a change needs a new number. Match the numbering to your certificates, labels and order documents, and keep a master table. Consistent numbers make certificate coverage and recalls much easier.

Why numbering matters

The model number is on the label, the certificate, the test report and the listing. If these do not match, retailers, labs and customs may question the product, and a recall cannot find the right units.

A simple structure

• Base model. Identifies the electrical design and housing, for example the power rating and platform.
• Variant suffix. Marks plug type, colour or packaging, which do not change the electrical design.
• Version. Shows a revision that changes the design in a way that matters for safety or performance.

Rules to write down

1. A change to safety-critical parts or ratings gets a new base model or version.
2. Colour and packaging changes use a suffix only.
3. Each certificate lists every model and variant it covers.
4. Models that are not electrically identical must not share a number.
5. Retired numbers are not reused.

Keep a master table

Record each number with the description, ratings, plug type, colour, certificate reference, first and last production dates and the factory. Share it with the factory, the lab and customer service.

Align the documents

Check that the label, the certificate, the test report, the packaging and the listing all show the same number. Differences are a common reason for rejected documents.

Keep the scheme simple

Avoid very long codes or codes with hidden meanings that only one person understands. Short, clear, documented codes work best.

Transition

When you change the scheme, map old numbers to new ones, and keep the map with the records.

Quick summary

Base model, variant suffix, version rules, a master table and matched documents.

A worked example

Imagine base model 65A for a 65-watt design, with suffix -US for a North American plug and -BK for black. The label would read 65A-US-BK. If the transformer changes in a way that matters for safety, the version moves from 65A to 65B, and the certificate must be updated. A clear pattern like this lets anyone read a code and know what it means.

Where this answer says to confirm with Wecent, the detail is not published on the product page and has to come from the datasheet or the factory. General facts come from the regulators, standards bodies or device makers named in the text.