Stäubli Electrical Connectors MC4 PV-AZS4 E - Abzweigstecker (32.0197)

Solar installers wiring parallel strings on commercial rooftops often need a reliable way to split DC power without adding junction boxes. The Stäubli MC4 PV-AZS4 E branch connector solves this by merging two PV module strings into a single output directly at the array, using proven MULTILAM contact technology for low resistance and long-term stability under harsh outdoor conditions.

Key specifications

• Connector type: MC4 branch connector (Y-type), 2 inputs to 1 output
• Polarity: Female (socket) contacts
• Rated voltage: 1500 V DC (IEC)
• Rated current: 39 A (with 4 mm² / 12 AWG cable)
• Contact technology: MULTILAM, tin-plated copper
• Insulation material: PA / PC, flammability UL94-V0
• Protection degree: IP67 / IP68 (mated, 1 m, 1 h), IP2X unmated
• Ambient temperature range: -40 °C to +85 °C, max operating 105 °C
• Safety class II, overvoltage category III
• Locking system: snap-in, mating cycles ≥ 100
• Certifications: TÜV Rheinland, UL, JET, CQC

Why choose it

This branch connector eliminates the need for separate combiner boxes in many string-level parallel connections, reducing installation time and potential failure points. The MULTILAM contact system ensures consistently low contact resistance even after thermal cycling, while the IP68 rating protects against dust and temporary immersion. Its wide temperature range and UV-stable housing make it suitable for extreme climates from deserts to alpine sites.

Ideal use cases

• Parallel connection of two PV strings on residential or commercial rooftops
• Ground-mounted solar farms where string combiners are not required
• Retrofit projects needing a compact, certified branch solution
• Solar carports and floating PV systems with high humidity exposure

Good to know

The connector is supplied as a loose component; mating MC4 plugs and appropriate cable glands must be ordered separately. For 1500 V systems, ensure all connected components are rated accordingly. The snap-in locking provides an audible click for secure mating, and the connector can be unmated using standard MC4 tools. It is not suitable for direct burial without additional enclosure.