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DC Isolator Switch

DC Isolator Switch for Off-gird Photovoltaic

DC Isolator Switch Manufacturer for Solar PV & ESS

LSP manufactures IEC/EN 60947-3 and AS 60947.3 compliant DC Isolator Switches designed for safe and reliable DC circuit isolation in solar PV, battery energy storage, and other high-voltage DC applications.

  • Factory Direct Supply
  • OEM & Private Label Available
  • Up to 1200V DC Isolation
  • IP66 Outdoor Protection

Why You Choose LSP DC Isolator Switch

LSP combines reliable engineering, standardized manufacturing management, responsive technical support, and proven global supply capabilities to ensure consistent DC Isolator Switch quality and help you build long-term partnerships with confidence.
  • Reliable DC Arc Extinguishing Design
  • Strictly Controlled Manufacturing Process
  • Technical Support Within 12 Hours
  • Exported to 35+ Countries
DC Isolator Switch Internal Structure
DC Isolator Switch for Solar Application

Professional DC Isolator Switch Manufacturing Expertise

LSP has specialized in DC Isolator Switch manufacturing for over 15 years, delivering products with an electrical service life of 300 cycles and a mechanical service life of 15,000 cycles. We strictly control every stage of production to ensure consistent quality and reliable performance for every DC Isolator Switch.

Our DC Isolator Switch Product Range

LSP DC disconnect switch features a flexible installation and wiring design. Depending on the model, they support various cable entry configurations, including top-bottom and left-right connections, which enables easy adaptation to different equipment structures, enclosure layouts, and installation space requirements.
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DC Isolator Switch
PV Arrary Solar DC Isolator Switch LDS-32-4
DC Isolator Switch LDS-32/4
The LDS-32/4 DC Isolator Switch features a DIN rail mounting design for fast and secure installation...
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PV Arrary Solar DC Isolator Switch LDS-32-4E
DC Isolator Switch LDS-32/4E
The LDS-32/4E DC Isolation Switch features a panel-mounted design and supports applications up to 1200...
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PV Arrary Solar DC Isolator Switch LDS-32-4ED
DC Isolator Switch LDS-32/4ED
The LDS-32/4ED DC Isolator Switch features an IP66-rated design for reliable outdoor applications, providing...
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PV Arrary Solar DC Isolator Switch LDS-32-4EQ
DC Isolator Switch LDS-32/4EQ
The LDS-32/4EQ DC Isolator Switch is rated up to 32 A and complies with IEC/EN 60947-3 standards, providing...
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PV Arrary Solar DC Isolator Switch LDS-32-4M
DC Isolator Switch LDS-32/4M
The LDS-32/4M Solar Isolator Switch features a top and bottom cable entry design, simplifying wiring...
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PV Arrary Solar DC Isolator Switch LDS-32-4MH
DC Isolator Switch LDS-32/4MH
The LDS-32/4MH DC Isolator Switch incorporates a left and right wiring configuration, simplifying cable...
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Built for Safer and Reliable DC Isolator Switch

From rapid arc extinguishing to fire-resistant materials and flexible installation design, LSP DC Isolator Switches are engineered to improve system safety, simplify installation, and deliver reliable performance throughout the product lifetime.

DC-PV1 / DC-PV2 Utilization Category

Certified for DC-PV1 and DC-PV2 applications, ensuring reliable isolation in photovoltaic systems.

Ultra-Fast Arc Extinguishing

Arcing time under 2 ms minimizes arc energy for safer DC circuit disconnection.

Flexible Non-Polarized Design

Supports bidirectional current flow, simplifying wiring and reducing installation constraints.

UL 94 V-0 Flame-Retardant Housing

High-performance flame-retardant material enhances fire safety and long-term reliability.

Reliable DC Isolator Switch for Outdoor Applications

LSP DC Isolator Switches are engineered with premium sealing materials and a precision sealing structure to achieve an IP66 protection rating, effectively preventing dust, rain, moisture, and water ingress from affecting critical internal electrical components.

The reinforced enclosure structure provides enhanced mechanical strength and environmental protection, helping maintain insulation performance and switching reliability even under challenging outdoor conditions.

DC Isolator Switch Precision Sealing Structure

Resource Center for DC Isolator Switch

Catalog
Certifications
Video

Professional Manufacturing Behind Every DC Isolator Switch

Every metal component used in LSP’s DC Isolator Switches undergoes appearance inspection, dimensional verification, and salt spray testing to ensure precise fit and long-term corrosion resistance. We are committed to delivering high-quality DC Isolator Switches with reliable performance and long-lasting durability for you.

Surge Protection Device SPD Manufacturing Mold Assembly
Surge Protection Device SPD Manufacturing Check Product Quantities

Reliable and Safe DC Isolator Switch Solutions

Isolator Switches are widely used in solar PV systems, energy storage systems, industrial automation, electrical distribution panels, motor control systems, commercial buildings, EV charging stations, HVAC equipment, and outdoor electrical installations.

Your Trusted Partner for DC Isolator Switch Solutions

Partner with LSP for dependable electrical protection solutions, flexible support, and reliable supply capabilities designed to meet your needs.

DC Isolator Switch: Specifications & Factory Overview

Explore detailed DC Isolator Switch parameters, product features, and factory capabilities to understand our engineering expertise and manufacturing quality.
Factory Gallery

Technical Parameters

Technical Data

LDS-32/4

LDS-32/4E

LDS-32/4ED

LDS-32/4EQ

LDS-32/4M(H/X)

Application

Solar PV / DC Systems

Rated Voltage (Ue)

300V / 600V / 800V / 1000V / 1200V DC

Rated Insulation Voltage (Ui)

1200V DC

Rated Thermal Current (Ith)

32A

Short-Time Withstand Current (Icw)

1kA/1s (4,4T,4B,4S); 1.7kA/1s (2H)

Impulse Withstand Voltage (Uimp)

8kV

Poles

4 Poles

Utilization Category

DC-PV1 / DC-PV2

Mechanical Life

15,000 cycles

Electrical Life

300 cycles

Arc Extinguishing Time

<2 ms

Protection Degree

IP20

IP66

Mounting Type

DIN Rail / Panel Mount

Panel Mount

 

Factory Gallery

Surge Protection Device SPD Manufacturing Mold Flow Analysis
Surge Protection Device SPD Manufacturing Electrical Discharge Machining
Surge Protection Device SPD Manufacturing Inspection
Surge Protection Device SPD Manufacturing Injection Molding Plastic Enclosure

What Customers Say About Our DC Isolator Switches

FAQ - DC Isolator Switch

Guess You Want to Know
Still Have Questions?

Can I get a sample before the bulk order?

Yes, we welcome sample orders to test and check the quality.

Is there any warranty for your item?

We provide 1 years limited warranty for the products. Please feel assured.

What are your payment terms?

We accept T/T and Paypal.

How's the delivery time?
It usually takes about 10-25 workdays to produce. Different products have different lead times.

Do you provide customized services?
Yes, we can customize it according to the client’s needs.

What is a DC Isolator Switch

DC Isolator Switch is also known as “direct current isolation switch” or “DC isolator”. It is an electrical device used to disconnect or connect DC circuits, mainly used to ensure that the circuit can be safely isolated from the power source during maintenance or inspection to prevent electric shock or equipment damage.

Main functions

Electrical isolation: In the off state, ensure complete isolation of the circuit with no current passing through.
Safety protection: Provide safety protection for maintenance personnel to avoid live operation.
Circuit control: Used for manual control of on/off in DC circuits.

Features:

Usually has high rated voltage and current to meet the requirements of DC systems.
Designed in compliance with safety standards to ensure reliable operation.

How does DC Isolator Switch

Working principle

Mechanical switch design

A DC isolation switch achieves circuit on/off through mechanical operation (manual or electric).
In the off state, the switch contacts are completely separated to ensure no current flows through the circuit.

Electrical isolation

When the switch is in the “off” position, the circuit is physically isolated to allow maintenance personnel to safely operate equipment.

This isolation prevents residual current or voltage in the circuit from posing a hazard to personnel or equipment.

Arc extinguishing design

In a DC circuit, current does not pass through zero (unlike AC), making it easy for an arc to form when disconnected.

DC isolation switches are typically equipped with arc extinguishing devices (such as magnetic blowout or insulation materials) to quickly extinguish arcs and protect switches and equipment.

How to Select the Right DC Isolator Switch?

Rated Voltage

Choose a voltage rating higher than the maximum system voltage.
Common ratings:

  • 600V DC

  • 1000V DC

  • 1200V DC

Rated Current

Select the correct current rating according to system requirements:

  • 16A

  • 25A

  • 32A

Number of Poles

Common options:

  • 2 Pole

  • 4 Pole

Protection Rating

For outdoor solar PV applications, it is recommended to select a DC Isolator Switch with a high protection rating to ensure reliable operation under harsh environmental conditions.
Common protection ratings include:

  • IP65

  • IP66

An IP66-rated DC Isolator Switch effectively protects against:

  • Dust ingress

  • Rainwater penetration

  • Moisture and humidity exposure

It is suitable for various outdoor applications, including:

  • Solar PV power plants

  • Outdoor energy storage systems

  • Industrial DC electrical equipment

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Contact

  • Wenzhou Arrester Electric Co., Ltd.
  • 5th FL, Bldg 2, No. 888 Liujiang Road, Beibaixiang, Yueqing, Zhejiang 325603 China
  • info@lsp.global
  • +86-18968826885
  • +86-18968826885

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