PRODUCTS
DC ISOLATOR SWITCH
Product Category
High-Reliability DC Isolator Switches for Solar & Industrial Projects
In any DC power system, safe isolation is non-negotiable. From utility-scale solar plants to industrial DC distribution networks, DC isolator switches play a critical role in ensuring personnel safety and protecting high-value equipment. Dvolt Electric supplies a comprehensive range of DC isolator switches and DC disconnect solutions engineered for renewable energy, industrial, and infrastructure projects worldwide.
Our isolator solutions are built for front-line operation—supporting EPC contractors, system integrators, and industrial panel builders who require dependable, standards-compliant DC disconnection for maintenance, emergency shutdowns, and system commissioning.
What Is a DC Isolator Switch and Why Is It Critical?
A DC isolator switch is a manually operated safety device designed to physically disconnect direct current power between a DC source—such as a photovoltaic string or battery bank—and downstream equipment like inverters or DC distribution panels.
Unlike AC systems, DC arcs do not naturally extinguish, making DC disconnection inherently more dangerous. Using an AC-rated switch in a DC application can result in welded contacts, equipment damage, or fire hazards.
Our DC isolator switches are purpose-built for DC loads, incorporating arc-extinguishing chambers and rapid switching mechanisms that safely break the circuit—even under load. In simple terms, the DC isolator is the primary “off-switch” that makes a site safe for human intervention.
Key Features & Technical Characteristics
Our DC isolator portfolio is engineered to perform reliably across a wide range of operating environments and system designs.
Technical Performance
- Voltage Ratings: 500VDC to 1500VDC
- Current Ratings: 16A up to 125A+
- Arc Suppression: Advanced magnetic and mechanical arc-extinguishing technology
- Switching Capability: Load-break rated for emergency disconnection
- Environmental Endurance: High-IP outdoor ratings for harsh and dusty environments
Compliance & International Standards
Safety is only as strong as the standards behind it. All DC isolator switches supplied by Dvolt Electric comply with globally recognized electrical standards, including:
- IEC 60947-3 – International standard for low-voltage switchgear and disconnectors
- PV installation and renewable energy safety codes applicable across global markets
This ensures suitability for commercial, industrial, and utility-scale projects worldwide.
DC Isolator Product Range Overview
We maintain a broad inventory of DC isolator switch solutions to support diverse system architectures and installation requirements.
Solar DC Isolator Switches
Designed for photovoltaic strings, combiner boxes, and inverter inputs, these isolators prevent back-feed from batteries or adjacent strings during servicing.
- Ideal for rooftop, commercial, and utility-scale solar systems
- Available in multiple voltage and current ratings
Request technical datasheets or bulk EPC pricing.
Industrial DC Disconnect Switches
Built for industrial DC power systems, automation panels, and DC bus applications requiring robust mechanical isolation.
- Suitable for continuous-duty industrial environments
- Panel-mounted and DIN-rail options available
Available for industrial panel builds and bulk procurement.
Weatherproof & Enclosed DC Isolators
Engineered for outdoor and exposed installations, these isolators feature UV-resistant enclosures and lockable handles for added safety.
- IP65 / IP66 / IP67 ratings
- Ideal for solar farms, energy hubs, and outdoor DC panels
Request pricing for outdoor-rated isolator solutions.
Applications & Industry Use Cases
Our DC isolator switches are deployed across a wide range of critical sectors:
- Solar PV Systems: Safe isolation of strings, combiner boxes, and inverters
- Battery Energy Storage Systems (BESS): Disconnecting high-voltage battery racks during maintenance
- EV Charging Infrastructure: Local isolation for DC fast-charging stations
- Telecom & Data Centers: 48V DC systems and high-voltage DC power plants
- Industrial Automation: DC control panels and power distribution
Specifications & Available Ratings
| Parameter | Options Available | Engineering Notes |
|---|---|---|
| Voltage | 500V, 1000V, 1200V, 1500V | Critical for PV string design |
| Current | 16A – 125A+ | Load-dependent selection |
| Poles | 1P, 2P, 4P | Standard DC layouts |
| IP Rating | IP65, IP66, IP67 | Required for outdoor installations |
| Mounting | DIN-rail, Panel, Enclosed | Based on panel architecture |
Why Choose Dvolt Electric?
Procurement teams and engineers choose Dvolt Electric because downtime is costly and safety is non-negotiable.
Request Pricing or Browse DC Isolator Switches
Explore the DC isolator switches listed below to review specifications and ratings.
For bulk pricing, EPC quotations, or technical assistance, contact our engineering team for a tailored solution.
When safety and reliability matter, choose DC isolator switches engineered for real-world conditions and scalable projects.
Frequently Asked Questions
Is a DC isolator mandatory for solar PV installations?
Yes. International electrical standards and PV installation guidelines require dedicated DC isolators to safely disconnect solar arrays from inverters during maintenance and emergencies.
Can these switches interrupt current under load?
Yes. Our DC isolator switches are load-break rated, allowing safe interruption of current while the system is energized in emergency situations.
Do you offer project pricing for large installations?
Absolutely. We support bulk orders, EPC contracts, and long-term supply agreements for commercial and utility-scale projects.
