Enclosed DC Switch IP67 Nema 4X 2 Pole 1 String 48A 600VDC Lockable Rotary Handle

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

DC Isolator Selection Guide

String Box Selection Guide

UL North America Selection Guide

Technical

Technical Datasheet