Enclosed DC Switch IP67 Nema 4X 4 Pole 2 String 16A 900VDC Lockable Rotary Handle

Enclosed DC Switch – IP67 / NEMA 4X

4 Pole • 2 String • 16A • 900 VDC
Model: SI16-PEL64R-4

The SI16-PEL64R-4 Enclosed DC Switch is a robust, purpose-built DC isolator
designed for photovoltaic (PV) applications requiring safe and reliable
disconnection of two independent DC strings. Rated at
16A at 900 VDC, this model is ideally suited to modern solar installations
where multiple strings must be isolated within a single enclosure.

Featuring a 4-pole configuration, the SI16-PEL64R-4 enables simultaneous
isolation of two PV strings, reducing enclosure count, installation time, and overall
system complexity.

Unlike AC-modified devices, this switch employs true DC switching technology
to deliver controlled arc extinction and reliable performance under load, improving safety
and extending the operational life of the isolator.

The unit is housed in a rugged IP67 / NEMA 4X enclosure, offering excellent
protection against dust, water ingress, corrosion, and UV exposure. This makes it suitable
for both indoor and outdoor installations, including rooftop and exposed environments.

Key Product Benefits

• 4-pole DC isolator for isolation of two PV strings
• Rated at 16A with a maximum operating voltage of 900 VDC
• IP67 and NEMA 4X enclosure for harsh outdoor environments
• Lockable rotary handle supporting lockout/tagout safety procedures
• True DC switching technology (not AC-modified)
• High-performance DC arc suppression
• Clear and positive ON/OFF position indication
• UV-resistant, corrosion-resistant enclosure materials
• Long mechanical and electrical service life

Safety & Installation

The lockable rotary handle allows the switch to be secured in the OFF position, helping to
protect installers and maintenance personnel during servicing. Clear switch indication and
labeling support fast inspection and approval by Authorities Having Jurisdiction (AHJs).

The enclosed design provides generous internal wiring space, simplifying cable termination
for dual-string configurations and reducing installation errors.

Typical Applications

• Commercial and industrial solar PV installations
• Dual-string rooftop PV systems
• DC string and combiner isolation
• Inverter input isolation for two DC strings
• Utility and authority-approved solar projects