Description
A rugged, true-DC PV isolator designed to safely disconnect up to two strings (4 poles in series, 2 poles per string) in small and mid-size arrays. The SI25-PEL64R-4 uses IMO’s fast, operator-independent ratchet mechanism and knife-edge contacts to quench arcs quickly and reliably during loaded switching. The compact gray IP65/67 enclosure (variant-dependent) is built for outdoor service with rain and dust protection, while the lockable rotary handle supports safe LOTO practices. Inside, generous contact gaps and long arc-chambers are tuned for photovoltaic DC; the layout keeps wiring neat and accessible for field service. Use this unit between strings and inverter/combiner inputs to provide a visible, local means of isolation for maintenance and emergency shutdowns without adding complexity to BOS. It’s a durable, code-friendly component for rooftops, carports, and ground racks where weather resistance, repeatable switching, and clean installation matter.
Technical Specifications
| Category | Specification |
|---|---|
| Model | SI25-PEL64R-4 |
| Application | PV DC isolator / disconnect (roof or switchboard mount) |
| Poles / Strings | 4 poles in series (supports 2 strings, 2 poles per string) |
| Rated current | 25 A (DC) |
| Rated voltage | 700 VDC (per manufacturer rating for this variant) |
| Enclosure rating | IP65 (gray outdoor enclosure); many SI variants also list IP67/NEMA 4X |
| Handle | Lockable rotary (padlockable OFF for LOTO) |
| Switching tech | Ratchet trigger; knife-edge contacts, long arc-chambers |
| Operating temp | −40 °C to +45 °C (typical for SI25 range) |
| Terminations | Screw clamp terminals; accepts PV conductors sized to string current/run |
| Dimensions | ~180 × 98 × 107 mm (H×W×D) |
| Mounting | Surface / wall mount; multiple knockouts for conduit |
| Typical use | 2-string rooftop arrays, small C&I inputs, local PV shutdown at inverter |
Specs & Info