Beware of MC4 connector's copies and of connectors advertised as compatible!
Copies of our MC4 connectors keep on appearing on the market. From the outside, they are hard to distinguish from the original, but technical comparisons often reveal serious deficiencies in the quality and safety of copies.
The lack of safety-relevant characteristics harbors potential risks and may result in damage of the installation and may even lead to fire.
People who are working on photovoltaic installations are the first who pay for the consequences of connection between connectors from different manufacturers. We record here a lot of injuries.
For safety reasons, Stäubli Electrical Connectors advises against using copied products and products which are sold with the mention compatible with our products.
Stäubli Electrical Connectors does neither recognize nor validate mating compatibility between Stäubli Electrical Connectors connectors and connectors from other manufacturers.
Rely on the Original!
GENERAL STATEMENT BY STAUBLI ELECTRICAL CONNECTORS ON THE ADVERTISED “COMPATIBILITY” BETWEEN STAUBLI ELECTRICAL CONNECTORS MC3/MC4 CONNECTORS AND CONNECTORS FROM OTHER MANUFACTURERS
Stäubli Electrical Connectors does not recognize a compatibility between Stäubli Electrical Connectors MC3/MC4 connectors and connectors from other manufacturers.
Stäubli Electrical Connectors has never authorized and does not authorize anybody to talk about a mating compatibility of their products with those of Stäubli Electrical Connectors.
The wrong connector or miss mating of different brands can result in premature failure and possibly fire.
Therefore Stäubli Electrical Connectors excludes any responsibility in case of damages in relation to connecting combinations with third-party plug connectors and certification of the connectors is lost.
Besides please note the statements of TÜV and UL concerning the non-existence of a compatibility between connectors from different manufacturers:
Statement TÜV Rheinland LGA Products GmbH, Cologne
We would like to elucidate the following circumstances concerning plugging of tested and certified PV-connectors of the MC4-series from the manufacturer Stäubli Electrical Connectors with mating PV-connectors from other manufacturers:
1. The current valid certificate for the MC4-connector-series is based on passed tests of these products with the relevant mating PV-connectors of MC4-series.
2. Compatibility can be confirmed “only for products of the same type family from the same manufacturer”. The current certificate for the MC4 connector family is based “on positive results of tests on products with corresponding mating parts of the MC4 family.”
3. Beside others, due to these insecure circumstances with combined PV-connectors from different manufacturers, inspectors of PV-plants are requested to reject such combinations.
In the UL File QIJQ2.E343181 belonging to the category “Connectors for Use in Photovoltaic Systems – Component” under the section Conditions of Acceptability you will find the following statement: “These devices have only been assessed for UL Recognition with specific types of mated connectors within their product family. They have not been assessed to operate with any other similar devices from any other manufacturer”
Due to the reasons mentioned above (technical differences, doubtful long term reliability and loss of certification) we consider that the compatibility declaration is misleading and we dissociate ourselves from this declaration