Reliable DC Isolator Switch China Manufacturer and Supplier
TYPLE PV DC isolator switches provide safe manual disconnection for solar PV and energy-storage DC circuits. This page covers our full DC isolator switch range — voltage and current ratings, pole options, and enclosure types — to help EPC contractors and distributors specify the right disconnector for each installation.
Features of DC Isolator Switch
- Manual DC Isolation: Disconnect PV circuits for maintenance.
- Electrical Ratings: Up to 1200V DC and 32A.
- Pole Options: Available in 2-pole and 4-pole configurations.
- Weatherproof Enclosure: IP66 protection for outdoor use.
- Flexible Wiring: 1-in-1-out and 2-in-2-out options.
- Wide Temperature Range: −40°C to +85°C.
TYPLE DC Isolator Switch Series
A DC isolator switch — also called a DC isolating switch or DC disconnector — is a manually operated switch that safely connects or disconnects a solar PV DC circuit under load. It provides visible, positive isolation so a system can be de-energised for maintenance, fault-finding, or emergency shutdown, and is built to align with IEC/EN 60947-3. Unlike a fuse or a DC circuit breaker, a DC isolator switch does not provide overcurrent protection — its role is disconnection, not fault interruption. In solar systems it is typically installed at the inverter DC input, at combiner-box outputs, or at key sectionalizing points in the array, and is a standard requirement in many national installation codes. For a full comparison of the two devices, see the difference between a DC MCB and a DC isolator.
Why Choose TYPLE As Your DC Isolator Switch Supplier
TYPLE is a Wenzhou-based manufacturer of PV combiner boxes and DC protection components for solar and energy-storage systems, with 10+ years in low-voltage electrical manufacturing (founded 2015) in the Liushi electrical hub. We support OEM and ODM orders with short lead times.
send your model or project requirements; our engineering team replies with a tailored quotation and confirmed lead time within 24 hours.
Why Choose TYPLE As Your DC Isolator Switch Supplier
TYPLE is a Wenzhou-based manufacturer of PV combiner boxes and DC protection components for solar and energy-storage systems, with 10+ years in low-voltage electrical manufacturing (founded 2015) in the Liushi electrical hub. We support OEM and ODM orders with short lead times.
send your model or project requirements; our engineering team replies with a tailored quotation and confirmed lead time within 24 hours.
Solar DC Isolator Switch Applications
- Residential rooftop solar — main DC disconnect between the array and inverter, letting home systems be safely isolated for service.
- Commercial & industrial PV — string and sub-array isolation in rooftop, carport, and ground-mount systems, with 2-in-2-out and 4-pole options for multi-string layouts.
- Off-grid & energy storage (ESS) — manual DC disconnection on array and feeder circuits where a sealed, weatherproof isolator is required.
DC Isolator Switch Specifications and Options
- DC 1200V · 32A · 2P / 4P
- IP66 polycarbonate enclosure, –40°C to +85°C
- 1-in-1-out, 2-in-2-out, and DIY 1/2-string configurations
- Engineered to align with IEC/EN 60947-3
How to Choose the Right DC Isolator Switch
| Parameter | Why It Matters | TYPLE Coverage |
|---|---|---|
| Rated voltage (Ue) | Must match the system’s maximum DC voltage | Up to DC 1200V |
| Rated current (In) | Sized to the string or branch current | 32A (other ratings on request) |
| Poles | Sets how many DC circuits are switched at once | 2-pole / 4-pole |
| Enclosure rating | Outdoor sites need ingress and impact protection | IP66 waterproof (enclosed models) |
| Configuration | Matches string count and wiring layout | 1-in-1-out, 2-in-2-out, DIY 1/2-string |
| Reference standard | Confirms the design basis for disconnection | IEC/EN 60947-3 |
DC Isolator Switch Installation Locations
DC isolator switches provide manual disconnection points in solar PV systems. Installation locations depend on the circuit layout, equipment requirements, and applicable installation rules.
At the Inverter DC Input
Installed between the PV array and inverter, a solar DC isolator switch disconnects the incoming DC supply for servicing. Whether an external switch is needed depends on the inverter’s built-in isolation and installation requirements.
At Solar Combiner Box Outputs
A DC isolator switch at the output of a solar combiner box disconnects the combined supply from downstream equipment. Its voltage and current ratings must suit the combined output circuit.
At PV Strings or Array Sections
Separate switches allow individual strings or array sections to be isolated. DC isolator boxes can house multiple switches for independent circuit disconnection.
Frequent Asked Questions
A DC isolator switch manually connects or disconnects a solar DC circuit so it can be safely worked on, for example during maintenance or an emergency shutdown. It provides visible isolation but does not protect against overcurrent.
It is usually installed at the inverter DC input, at combiner-box outputs, or at key sectionalizing points in the array. The goal is to give a safe, accessible disconnection point for the DC side.
No. A DC isolator switch (IEC/EN 60947-3) only disconnects the circuit; it does not trip on overload or short-circuit. Overcurrent protection is handled by a DC fuse or a DC circuit breaker.
TYPLE DC isolator switches are rated up to DC 1200V and 32A, in 2-pole and 4-pole configurations, with other ratings available on request. Enclosed models carry an IP66 rating for outdoor use.
TYPLE DC isolator switches are engineered to align with IEC/EN 60947-3, and are built with components from certified supply-chain partners.
