MC4 EVO 2 Splitter (Stäubli) – set male + female

The Stäubli MC4 EVO 2 splitter set is the reliable way to connect two identical PV strings in parallel with original MC4 quality. The set consists of a male Y-splitter and female Y-splitter (PV-AZS4-EVO 2-UR & PV-AZB4-EVO 2-UR) and is suitable for 1500 V DC systems with H1Z2Z2-K PV cable 4-6 mm². Compact, low loss, IP68 (paired) and “Do not disconnect under load” clearly marked.

When to use this splitter?

• Parallel connection of 2 strings of equal voltage (same number of panels/same type).

• Near the panels or in the cable route to bring two branches together to one MPP input.

• Do not use to connect in series or disconnect under load.

Important for design & safety (installer)

• Voltage equality: strings you put in parallel should have the same open terminal voltage (Voc) and MPP voltage.

• Current limits: current = sum of both strings. Check the max input current of the inverter/MPPT as well as the max module fuse value.

• Fuses: for more than 2 strings in parallel, string fuses are almost always required. For exactly 2 strings: check the permissible “series fuse rating” of the panel (backfeed).

• Cable cross-section: use 4-6 mm² PV cable with correct MC4 pliers; tensile test and mount torsion-free.

• Sealing: connect/disconnect only dry and tension-free; allow couplings to engage fully (tensile test).

Positive points

• Original Stäubli MC4 EVO 2 quality (low contact resistance, powerline technology)

• IP68 (coupled), UV-resistant, -40…+85 °C

• Compact design: length approx. 55 mm, Ø connections ~4 mm (pin size MC4)

• Suitable for 1.5 kV-DC PV installations

• Set is supplied as male Y + female Y → immediately complete

Specifications (in brief)

• Type: PV-AZS4-EVO 2-UR (male Y) + PV-AZB4-EVO 2-UR (female Y)

• Rated voltage: 1500 V DC

• Rated current: up to 30-35 A (depending on cable section/temperature)

• Cable diameter: 4-6 mm² PV cable (H1Z2Z2-K)

• Protection: IP68 (linked), UV/ozone-resistant

• Operating temperature: -40…+85 °C

• Mounting: snap connection; do not loosen under load

Set contents

• 1× MC4 EVO 2 Y-splitter male (PV-AZS4-EVO 2-UR)

• 1× MC4 EVO 2 Y-splitter female (PV-AZB4-EVO 2-UR)