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AC Isolator Switch

Optimizing Space DIN Rail Isolator Switch

Reliable AC Isolator Switch Manufacturer for Industrial Power Isolation

LSP delivers reliable AC Isolator Switch solutions for industrial equipment, solar systems, HVAC applications, and commercial power distribution, helping you achieve safer electrical isolation, improved system reliability, and long-term operational stability.

  • IEC/EN 60947-3 Compliance
  • OEM & Private Label Support
  • 16A–125A Current Range
  • 100,000 Mechanical Operations

Why You Choose LSP AC Isolator Switch

LSP has earned the trust of global partners through consistent quality and reliable performance, providing you with a more reliable and efficient AC Isolator Switch sourcing experience. We help you minimize quality risks, ensure stable supply, and expand your electrical product offerings with dependable isolation solutions.
  • 15+ Years of Manufacturing Experience
  • Global Market Experience Across 35+ Countries
  • Customization Services (Logo, Packaging & Labeling)
  • Fast Production with 10–25 Working Days Lead Time
How Compact DIN Rail Isolator Switches Help Optimize Space in Modern Distribution Boards
High-quality AC Isolator Switch Installed in Combiner Box

Reliable AC Isolator Switch Manufacturer with Strict Quality Control

Every LSP AC Isolator Switch is manufactured under a strict quality management system and undergoes more than ten manufacturing and inspection processes, from raw material inspection and component processing to final assembly and product testing, ensuring consistent quality and reliable performance.

Our AC Isolator Switch Series

Our AC isolator switch series offers 3-pole and 4-pole configurations with current ratings from 16A, 20A, 25A, 32A, 40A, 63A, 80A, 100A, 125A, specifically designed for industrial and commercial power systems to deliver safe, reliable, and efficient power isolation solutions.

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AC Isolator Switch
AC Isolator Switch LAS-125-3P
AC Isolator Switch LAS-125/3P
LAS-125/3P AC Isolator Switch, 125A 3-pole, IEC/EN 60947-3 compliant, IP20 rated. Ideal for high-current SPD integration and industrial safety.
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AC Isolator Switch LAS-80-3P
AC Isolator Switch LAS-80/3P
LAS-80/3P AC Isolator Switch, 80A, DIN Rail Mount, designed for industrial power management with outstanding safety and reliability.
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AC Isolator Switch LAS-40-3P
AC Isolator Switch LAS-40/3P
AC Isolator Switch LAS-40/3P, 40A, designed for machinery control, ensuring safe isolation and reliable operation.
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AC Isolator Switch LAS-125-3D
AC Isolator Switch LAS-125/3D
LAS-125/3D Panel Mount AC Isolator Switch with a 125A rated current is designed for safe and reliable isolation in building automation systems.
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AC Isolator Switch LAS-80-3D
AC Isolator Switch LAS-80/3D
AC Isolator Switch LAS-80/3D, 80A rated current, din rail mount. Designed for industrial power systems, ensures reliable isolation and switching, easy installation.
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AC Isolator Switch LAS-40-3D
AC Isolator Switch LAS-40/3D
LAS-40/3D AC Isolator Switch features a 40A rated current and is designed for compact, reliable power distribution and equipment isolation in demanding industrial environments.
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Premium AC Isolator Switch for Safe and Efficient Electrical Control

LSP AC Isolator Switches are developed to provide secure isolation, flexible configurations, and reliable operation, helping you improve electrical safety and optimize system performance.

Terminal Cover Protection

Insulated cover prevents accidental contact and improves wiring safety.

Flexible Pole Expansion

Expand from 3P to 4P with an optional side mount add-on pole to suit different installation requirements.

Multiple Load Applications

Supports AC-21, AC-22, and AC-23 utilization categories for reliable switching of resistive, mixed, and motor loads.

Durable Flame-Retardant Housing

Made with UV-resistant UL 94 V-0 materials for enhanced safety, durability, and long-term performance.

One Supplier, Complete AC Isolator Switch Solutions

LSP offers a complete portfolio of AC and DC Isolator Switches, allowing you to source multiple isolation solutions from one reliable partner.
From AC power distribution and industrial applications to solar and energy storage systems, our broad product range helps reduce supplier complexity, improve project efficiency, and support long-term business growth.
AC Isolator Switch, DC Isolation Switch and DC Combiner box

Resource Center for AC Isolator Switch

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Trusted AC Isolator Switch Manufacturer with Reliable Manufacturing Capability

With a 2,500㎡ manufacturing facility, dedicated production workshops, and professional testing laboratories, LSP maintains strict control over every stage of AC Isolator Switch production.
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Surge Protection Device SPD Manufacturing Check Product Quantities

Application of AC Isolator Switch

LSP AC Isolator Switches are widely used in power distribution systems, building automation, petrochemical installations, machinery control, and various industrial electrical applications.

Your Reliable Partner for AC Isolator Switch Solutions

From product selection to customization and delivery, LSP supports your projects with complete solutions.

AC Isolator Switch Specifications & Manufacturing Capabilities

Discover the engineering details behind LSP AC Isolator Switches, including precise technical specifications, product configurations, and advanced manufacturing capabilities.
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Technical Parameters

Parameter LAS-xx/3(T) & LAS-xx/4(T) LAS-xx/3P(T) & LAS-xx/4P(T) LAS-xx/3D(T) & LAS-xx/4D(T)
Installation Type DIN Rail Mount DIN Rail Mount / Panel Mount DIN Rail Mount / Door interlock
Rated Operational Current (AC-21A / AC-21B) Ie ≤690V, 16A–125A
Rated Operational Current (AC-22A / AC-22B) Ie 415V / 500V / 690V
Rated Operational Current (AC-23A / AC-23B) Ie 415V / 500V / 690V
Rated Operational Power (3-Phase, AC-23A) Up to 55kW (415V)
Rated Conditional Short-Circuit Current (Fuse Protection) 50kA @415V
Rated Conditional Short-Circuit Current (Circuit Breaker Protection) 3kA (t ≤0.3s)
Rated Short-Time Withstand Current Icw Up to 2.75kA (1s)
Rated Short-Circuit Making Capacity Icm Up to 3.9kA
Rated Insulation Voltage Ui 800V
Rated Impulse Withstand Voltage Uimp 8kV
Pole Configuration 3P / 4P
Utilization Category AC-21A/B, AC-22A/B, AC-23A/B
Standard Compliance IEC/EN 60947-3

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What Customers Say About Our AC Isolator Switches

FAQ - AC 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.

Do you provide customized services?

Yes, we can customize it according to the client’s needs.

What is an AC Isolator Switch

An AC Isolator Switch is a mechanical switching device designed to safely disconnect an alternating current (AC) electrical circuit from the power source. It provides a visible and reliable isolation point, allowing electricians and maintenance personnel to safely inspect, repair, or service electrical equipment without the risk of accidental energization.
Unlike standard circuit breakers that are mainly designed for overcurrent and short-circuit protection, an AC Isolator Switch focuses on safe electrical isolation and manual disconnection control. It is commonly installed in power distribution systems, industrial machinery, HVAC equipment, control panels, commercial buildings, and renewable energy applications.
LSP AC Isolator Switches are engineered according to IEC/EN 60947-3 standards, supporting multiple utilization categories including AC-21A, AC-21B, AC-22A, AC-22B, AC-23A, and AC-23B. With options from 16A to 125A, 3-pole and 4-pole configurations, LSP provides flexible isolation solutions for different electrical applications.

Where Are AC Isolator Switches Used?

LSP AC Isolator Switches are widely applied in various electrical systems, including:

Industrial Machinery

Provides safe power isolation for motors, production equipment, and automation systems.

HVAC Systems

Ensures safe maintenance and service isolation for air conditioning and ventilation equipment.

Power Distribution

Used in commercial buildings, electrical panels, and low-voltage distribution systems.

Control Cabinets

Provides reliable switching and isolation solutions for industrial control applications.

Renewable Energy Systems

Supports safe AC-side isolation in solar PV and energy storage installations.

How to Wire AC Disconnect Switch

Wiring an AC Disconnect Switch requires correct connection of the incoming power supply, outgoing load terminals, and grounding system according to the electrical design requirements. Before installation, the power supply must always be completely disconnected to ensure safe operation.
A typical AC Disconnect Switch wiring process includes:

1. Identify Input and Output Terminals

Connect the incoming AC power supply cables to the line terminals and connect the equipment or load cables to the load terminals. Correct terminal identification helps ensure proper current flow and safe operation.

2. Select Proper Pole Configuration

  • 3 Pole AC Isolator Switch: Suitable for three-phase systems without neutral isolation.
  • 4 Pole AC Isolator Switch: Allows isolation of three-phase circuits with neutral disconnection requirements.

3. Check Tightening Torque and Installation

All terminal screws should be tightened according to recommended torque values to prevent overheating caused by loose connections.

LSP recommends professional installation by qualified electricians to ensure the AC Isolator Switch operates safely and reliably.

How to Choose the Right AC Isolator Switch?

Selection FactorConsideration
Rated CurrentMatch the system load current
Rated VoltageEnsure compatibility with AC system voltage
Pole NumberSelect 3P or 4P according to circuit design
Utilization CategoryChoose AC-21, AC-22 or AC-23 based on load type
Installation MethodSurface mount, panel mount or DIN rail
Protection RequirementsConsider environment and installation conditions

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  • 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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