Enclosed DC Switch IP67 Nema 4X 2 Pole 1 String 48A 600VDC Lockable Rotary Handle (SI40-PEL64R-2)
Product Name
Enclosed DC Switch IP67 NEMA 4X, 2 Pole, 1 String, 48A, 600VDC, Lockable Rotary Handle (SI40-PEL64R-2)
Overview
The SI40-PEL64R-2 is a TRUE DC solar isolator designed for photovoltaic (PV) systems. This enclosed DC switch offers high reliability, safety, and performance for isolating a single PV string. The unit features an IP67 / NEMA 4X outdoor-rated enclosure, lockable rotary handle, fast arc suppression, and operator-independent switching action.
Model Identification
Series: SI Series DC Solar Isolator
Model: SI40-PEL64R-2
Poles: 2 Pole
String Support: Single String
Electrical Ratings
Rated Operational Current: 48 A
UL Current Rating: 40.0 A
Rated Operational Voltage: 600 VDC
Rated Insulation Voltage (Ui): 1500 VDC
Utilisation Categories: DC-PV1, DC-PV2, DC-21A, DC-21B, DC-22B
Switching Performance
TRUE DC knife-edge rotary contacts with double break per pole.
Independent spring-assisted switching mechanism ensures rapid contact separation, reducing arcing and increasing safety.
Guaranteed fast arc suppression (typically ≤ 3 milliseconds).
High short-circuit withstand capacity (product dependent, typically up to 2400 A).
Handle & Locking
Handle Type: Lockable Rotary Handle
Lockable OFF Position: Yes (compliant with IEC 60947-1)
Enclosure access is only possible when the switch is in OFF, preventing inadvertent access under live conditions.
Environmental & Mechanical Protection
Enclosure Protection: IP67 (dust tight, protection against immersion)
NEMA Rating: NEMA 4X (weatherproof, corrosion resistance)
Operating Temperature Range: -40°C to +45°C
Outdoor-rated and suitable for harsh environmental conditions, including solar arrays exposed to sun, rain, and dust.
Cable Connection Details
Cable Size (Metric): 2.5 – 25 mm²
Cable Size (AWG): 16 – 10 AWG
Terminals designed for secure clamping and reliable DC connection at full rated current.
Safety Features
Polarity independent — no specific wiring direction required for DC input.
Rotary handle with locking ensures secure maintenance isolation.
Self-cleaning contact mechanism helps maintain contact integrity over long service life.
Certifications & Compliance
UL Certifications: UL 508I (PV disconnect switches), UL 60947-1, UL 60947-4-1
International Standards: IEC/EN 60947-1, IEC/EN 60947-3
Australia / New Zealand Approval: Energy Safe Victoria (ESV) Level 3 to AS 60947.3 with RCM marking
Other Marks: CE, UKCA, RCM, RoHS
Materials are rated for flame retardance (enclosure UL 94 V-0, handle UL 94 V-2).
Typical Applications
Residential and commercial solar PV installations
String-level DC isolation between PV array and inverter
Outdoor solar combiner boxes and DC isolation panels
Industrial PV systems requiring robust, lockable DC disconnects
Key Advantages
Specifically designed for DC solar applications (not modified AC switches)
High safety with fast arc extinction and independent switching action
Superior environmental protection (IP67 / NEMA 4X)
Lockable OFF rotary handle for secure maintenance isolation
Wide temperature range and high short-circuit withstand
Downloads
UL North America Selection Guide
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