Short answer: A counterfeit breaker rarely looks wrong, because the housing is the cheapest part to copy and the expensive parts are inside — the arc chute, the contact material, the bimetallic strip and its calibration. So you do not detect one by looking at the plastic. You detect it by matching four things that a counterfeiter usually cannot keep consistent: the ordering code on the device, the code on the carton, the code on the certificate, and the code on the invoice — and then checking that the certificate exists in the issuing body’s registry rather than only as a PDF in someone’s email.
We are an independent trading company — not a manufacturer, and not an appointed distributor of any brand. Brand protection is not our business; getting you a device that trips at the current printed on it is.
Why the eye test fails
Miniature circuit breakers are simple objects made of hard-to-fake materials. The moulding is easy: a copy of a housing costs a fraction of a tool and looks identical under fluorescent light. What is expensive is everything a buyer cannot see — the grading of the contacts, the geometry of the arc chute that splits and cools the arc, the bimetallic element and, above all, the calibration that makes the thermal trip land inside the band the standard allows.
That asymmetry explains the economics of counterfeiting in this category. The visible 80 per cent is cheap; the invisible 20 per cent is where the cost and the safety live. A counterfeit usually works exactly as designed — at normal load, in a residential panel, for years. It fails at the one moment it exists for: the fault current it was never built to interrupt, or the sustained overload it was never calibrated to catch.
The failure modes follow the same split. A device with a copied housing and a real mechanism but a lower breaking capacity will clear a modest short circuit and destroy itself on a large one, sometimes with the arc escaping the case. A device with a copied mechanism and a cheaper bimetallic strip will either fail to trip on overload or nuisance-trip, and nuisance tripping is what pushes people to uprate a breaker, which removes the protection entirely.
Start with the marking, because the standard defines it
IEC 60898-1 does not leave marking to the manufacturer’s taste. A compliant miniature breaker carries a defined set of printed data, and each item is checkable against the certificate. This is the fastest screening test available and it needs no tools.
| Marking item | What it tells you | Sign of trouble |
|---|---|---|
| Manufacturer name or mark | Who is accountable for the device | No name, or a name that does not match the certificate holder |
| Rated current (In) | The current the thermal element is calibrated to | In printed on the front but absent from the side marking, or inconsistent between them |
| Rated voltage (Ue) | The system voltage the device is built for | A 230/400 V device offered for a 127 V system, or a voltage string that does not appear on the certificate |
| Breaking capacity (Icn) | The short-circuit current it can interrupt and still be usable | The number is the first thing a counterfeiter upgrades; verify it against the certificate, not the box |
| Trip curve letter | B, C or D — the magnetic band | Curve letter printed but no curve table anywhere in the documentation |
| Standard reference | IEC 60898-1 for household MCBs, IEC 60947-2 for industrial breakers | A device claiming both without explaining which rating applies to which standard |
| Pole schematic and connection diagram | Which terminals are line, load and neutral | Diagram inconsistent with the physical terminal layout |
Two traps hide in that table. The first is the standard reference: IEC 60898-1 ratings and IEC 60947-2 ratings are different quantities with different test regimes, and a family that is certified under one is not automatically certified under the other. The second is the breaking capacity, because the same frame is often sold at two levels — a standard version and a higher-rated version — and the difference is not visible from outside. Reading the marking is covered in more depth in how to read MCB marking, and the two standards are compared in IEC 60898 vs 60947.
Match the code across four places
Counterfeiters reproduce objects, not document sets. The ordering code is where the two diverge, so the test is a four-way match.
| Location | What must match | How it fails in practice |
|---|---|---|
| Device | The full ordering code, including pole count, curve and rating suffix | Device carries a generic family name with no suffix |
| Carton and inner box | The same string, plus quantity per box | Carton reprinted with a higher rating than the device inside |
| Certificate or test report | The exact code, the declaring entity, the standard and the ratings tested | Certificate covers the family but not the variant; ratings on the certificate do not appear on the device |
| Commercial invoice and packing list | The same code, quantity and description | Invoice describes “electrical parts” generically, so customs cannot cross-check anything |
When those four disagree, the disagreement itself is the finding — you do not need to prove the goods are counterfeit to refuse them. When they agree, you have established document consistency, which is necessary but not sufficient: the certificate still has to be real.
Check the registry, not the PDF
A certificate is a file; a registration is a record held by an authority. Counterfeiters supply files. Every regulated market in this category maintains a lookup that the file cannot fake.
| Market | What to look up | Why it catches copies |
|---|---|---|
| United Arab Emirates | The product conformity database published by the industry ministry, searched by brand and model | A certificate number that does not resolve to a product record is a copied number |
| Saudi Arabia | The SABER record behind the product certificate | Registration is tied to a Saudi commercial registration, so a PDF alone cannot exist outside it |
| Russia and the EAEU | The EAC registry entry behind the certificate number | The registry holds the applicant and the code; a borrowed certificate shows a different holder |
| Chile | The QR code on the SEC approval mark | A physical mark that resolves to nothing is the clearest counterfeit signal in the category |
| Philippines | The import commodity clearance sticker against the bureau’s verification tool | The authority has publicly warned about copied clearance stickers |
| Indonesia | The SNI certificate and the local holder named on it | Spot checks in the market have found panels containing falsely marked breakers |
The general rule is worth stating plainly: a certificate that exists only as a PDF is a claim; a certificate that resolves in the issuing body’s registry is evidence. Both are different from a certificate that names a holder you have never heard of, which is the classic borrowed-certificate pattern — several sellers quoting the same registration, none of them the party the registration was issued to. That pattern is not counterfeiting of the device, but it produces the same outcome when the market supervision authority arrives.
Two related traps are worth knowing. A certificate for a family does not certify every variant inside it, which is why the code has to match. And a China-market compulsory mark is not an export credential — it says something about the domestic market the device was approved for, not about the destination you are shipping to.
Five questions that separate a supplier from a reseller of unknowns
Ask these before the order, not after the carton is opened. The answers are checkable, and the way they are answered matters as much as the content.
First: which exact ordering codes are you quoting, and can I have the certificate set for those codes before I pay? A supplier who works from a family name rather than a code is guessing. Second: who is the certificate holder, and is it the plant that made this unit? Third: what is the breaking capacity of this specific code at my system voltage — not the family maximum? Fourth: which laboratory issued the underlying report, and to which edition of the standard? Fifth: what happens if the goods fail inspection at my end — who pays for the re-export?
The fourth question is the one that separates paperwork from product. Reports are issued against a named standard edition, and a report to an older edition is not a report to the current one; the ratings printed on the device should be the ratings that were tested. The genuine product page walks through the verification sequence, and the cross-reference is the right starting point when a customer specifies a brand you do not stock.
If you find one
Stop the shipment and document it — photographs of the device marking, the carton, and the certificate that was supplied with it, all in one frame if possible. The four-way mismatch is the evidence; without it, the conversation becomes a dispute about opinion. Then report it to the certificate holder named on the document and to the market surveillance authority in the destination country, because a copied certificate is usually copied many times and the authority can act on the registration.
For a buyer the practical conclusion is unglamorous. Counterfeit detection is a documentary discipline, not a visual one: match the code, resolve the registration, and keep the photographs. What you cannot check, you should not buy in volume.
Send the ordering codes you need and the destination market, and we come back with the certificate position per code, the ratings at your system voltage, and the registry entries you can verify yourself — the enquiry form is here. For how the goods are checked before the container is sealed, see pre-shipment inspection; for which certificate your market requires, start here.
FAQ
Q: How can I tell a counterfeit breaker from a genuine one?
A: Match the ordering code across the device, the carton, the certificate and the invoice, then resolve the certificate in the issuing body’s registry rather than accepting a PDF. Visual inspection cannot establish breaking capacity or calibration, which is where a counterfeit differs from the real device.
Q: Is a copied housing enough to identify a counterfeit?
A: No. The housing is the cheapest component to copy and often looks identical. The differences that matter are internal — contact material, arc chute geometry, the bimetallic element and its calibration — and they show up as a wrong breaking capacity or a wrong trip band, not as a moulding defect.
Q: What does the marking on a compliant MCB have to show?
A: Under IEC 60898-1, the manufacturer, rated current, rated voltage, breaking capacity, trip curve, standard reference, and the pole and connection diagram. Each item should be checkable against the certificate for that exact code.
Q: What is a borrowed certificate?
A: A registration held by one party that several sellers quote as if it were theirs. The device may be genuine, but the party named on the certificate is not the one shipping, which becomes a problem the moment market surveillance checks the consignment against the registration.
Q: Does a China-market compulsory mark mean the breaker is certified for export?
A: No. It indicates approval for the domestic market it was issued for. Certification for your destination is a separate question, answered per exact ordering code and per market programme.
Q: What should I do if the codes do not match?
A: Refuse the consignment and document it — device marking, carton and the supplied certificate in the same photograph. The mismatch is the evidence, and it is usually enough without any technical argument about the product itself.
Related: How to verify genuine product · How to read MCB marking · IEC 60898 vs 60947 · Pre-shipment inspection · Cross-reference · Which certificate your country requires · MCB range · 6 kA vs 10 kA