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ST4F12B. Female solar connector

Reference: 22000002

MC4 compatible female, socket solar connector. It is used to connect the different photovoltaic solar panels installed on the roof or in any other type of mount with different 4 to 6 mm² cross-section wires that are part of the installation. It has a locking system and is easy to assemble.

Key features of the new connectors for 2024:
Integrated safety device to prevent tampering that could compromise the safety of the solar installations.

  • TÜV certification. Recognised by one of the most prestiogious institutions in the sector, ensuring quality and reliability.
  • Ensayos exhaustivos en laboratorios de SGS. Hemos sometido nuestros conectores a:
    • Ensayos de calentamiento
    • Ensayos mecánicos
    • Ensayos de resistencia
    • Ensayos de compatibilidad con Stäubli Evo*, asegurando su compatibilidad en la gran mayoría de instalaciones.

This plug-in solar connector ST4F12B is sold in sets of two, together with the male solar connector.

* It is important to note that Stäubli Evo´s compatibility is essential for many panel and inverter suppliers, who demand testing and documentation of compatibility.




Rated current

30 A

Operating temperature

-40ºC / 85ºC


IP65/IP68 (1m,1h)

Application class


Cable/wire cross

4 mm / 6 mm

Security class



UL94 – V0

Insulating material

Copper, tinned

Connectors contact resistance

≤ 0.5mΩ

Salt mist spray test, degree of severity 6

IEC 600068-2-52

Voltage test

6KV (50Hz, 1min)

Upper limiting temperature


Wire range

2,5 – 4 – 6 mm2

Closing system

Snap lock with security system

Technical details

Download the Technical Factsheet of ST4F12B female solar connector.