LETOP DC isolator switch manufacturer is helping you expand their product line to meet market demand. With 15+ years of manufacturing experience and a strict quality control system, we provide a full range of OEM/ODM solutions from standard products to deep customization, allowing your brand to stand out in the fiercely competitive market.
LETOP are not just a manufacturer, but also a reliable partner for your business growth. By providing high-quality DC isolating switch OEM/ODM services, we help you quickly expand your product line and improve your market competitiveness. You can focus on sales and customer relations, and everything we do is to ensure product quality and stable delivery. At the same time, we provide necessary technical support in a timely manner, allowing you to establish a professional image in front of your customers.
Rigorously tested and fully compliant with IEC 60947-3 standard for switches, disconnectors, and switch-disconnectors, ensuring verified safety performance.
Engineered for safe operation under load (DC-PV2, DC-PV1, DC-21B), allowing disconnection even when the system is active.
Offered in robust enclosures, with IP66 rating for protection against dust, water, and UV exposure, ensuring longevity in harsh solar environments.
Our extensive manufacturing history informs designs optimized for ease of installation and long-term operational reliability in demanding DC applications.
LETOP offers DC isolator switches in a variety of installation options to meet different applications and make installation flexible and convenient. Compact DIN rail mounted units, robust IP66 enclosed switches, and more.
You can attach the DIN rail mounted DC Isolator to a standard DIN rail with a width of 35mm by snaps or screws. This mounting method is usually used inside a distribution cabinet, combiner box or control box, which facilitates modular installation and maintain, and works with similar DIN rail mounted electrical components like circuit breakers.
They ‘re small and fit right in with other electrical cabinets and switchboards. The L1 series has a push-forward locking mechanism, while the L2 series has a push-locking mechanism that locks the handle in the “OFF” position. NL1-T and NL1 are both switch bodies designed for DIN rail installation and have an IP20 protection level. NL1-T is known for its ultra-thin handle design that makes it easy to operate in limited spaces. The NL1 Series is suitable for specific 4P CB4N or CB8N switch bodies, providing flexible internal installation solutions. These series are suitable for residential or commercial photovoltaic systems of 1-20KW, mainly used inside distribution cabinets.
Features:
Classic design, the handle can be locked in the ""OFF"" position.
Rated operating voltage (Ue):
300V, 600V, 800V, 1000V, 1200V DC
Rated operating current (Ie):
16A, 25A, 32A
Number of poles:
2 poles, 4 poles (support single string/dual string)
Protection level:
IP20
Arc extinguishing time:
<8ms
Features:
Enhanced design, improved operating stability
Rated operating voltage (Ue):
300V, 600V, 800V, 1000V, 1200V DC
Rated operating current (Ie):
16A, 25A, 32A
Number of poles:
2 poles, 4 poles (support single string/dual string)
Protection level:
IP20
Arc extinguishing time:
<8ms
Features:
Compatible with 4P CB4N or CB8N switch body
Rated operating voltage (Ue):
300V, 600V, 800V, 1000V, 1200V DC
Rated operating current (Ie):
16A, 25A, 32A.
Number of poles:
2 poles, 4 poles (support single string/double string).
Protection level:
IP20
Arc extinguishing time:
<8ms
Features:
Ultra-thin handle design, suitable for installations with limited space
Rated operating voltage (Ue):
300V, 600V, 800V, 1000V, 1200V DC
Rated operating current (Ie):
16A, 25A, 32A
Number of poles:
2 poles, 4 poles (support single string/dual string)
Protection level:
IP20
Arc extinguishing time:
<8ms
This DC Isolating switch either on the wall or outside the equipment, or fixed to the surface of the distribution board or photovoltaic combiner box with its housing.
Both the ELR1 and ELR2 DC isolating switches use a sturdy plastic housing with IP66 protection to prevent dust and water, and have UV resistance to ensure long-term reliable operation in outdoor or humid environments.
These DC Isolator series are usually placed between the photovoltaic array and the inverter for reliable isolation of the DC circuit. The product supports vertical or horizontal installation, and the handle can be locked in the “OFF” position to ensure safety during maintenance. The ELR1 is also equipped with an MC4 plug adapter and air valve, while the ELR2 has an M20 knockout hole for easy cable connection.
Features:
MC4 plug adapter or cable connector is optional; Air valve is provided to help air circulation and temperature reduction.
Rated operating voltage (Ue):
300V, 600V, 800V, 1000V, 1200V DC
Rated operating current (Ie):
16A, 25A, 32A
Number of poles:
2 poles, 4 poles (support single string/double string)
Protection level:
IP66, weatherproof and UV resistant
Utilization category:
DC-PV2 / DC-PV1 / DC-21B
Arc extinguishing time:
< 8ms
Features:
The handle can be padlocked in the "OFF" position; M20 knockout hole is provided; MC4 plug adapter or cable connector is optional.
Rated operating voltage (Ue):
300V, 600V, 800V, 1000V, 1200V DC
Rated operating current (Ie):
16A, 25A, 32A
Number of poles:
2 poles, 4 poles (support single string/double string)
Protection level:
IP66, weatherproof and UV resistant
Utilization category:
DC-PV2 / DC-PV1 / DC-21B
Arc extinguishing time:
< 8ms
With the remote handle mounted isolator switch, you can put the isolating switch body inside the distribution cabinet, and the operating handle outside the cabinet door and connected to the switch body through a shaft.
This design provides convenient external operation and locking functions while ensuring safe isolation inside the equipment. This allows the operator to safely perform on-off operations without opening the distribution cabinet door, and the handle can be locked in the “OFF” position to improve safety.
Features:
DIN rail base installation, handle can be padlocked in the "OFF" position, handle can be installed on the cabinet door.
Rated operating voltage (Ue):
300V, 600V, 800V, 1000V, 1200V DC
Rated operating current (Ie):
16A, 25A, 32A
Number of poles:
2 poles, 4 poles (support single string/double string)
Utilization category:
DC-PV2 / DC-PV1 / DC-21B
Arc extinguishing time:
< 8ms
Fast switching , you can minimize arc duration for improved safety and contact longevity.
Reliable switching makes a super fast make/break action and ensures the load circuits are disconnected.
Allows locking in the OFF position to prevent accidental re-energization during maintenance.
Protects the switching mechanism from environmental factors, ensuring reliable operation outdoors.
Clear visual confirmation that contacts are safely open, providing operator confidence.
Optimized design makes it super easy to mount switches in enclosures or panels.
Make sure to implement DC isolation with LETOP’s range of IEC 60947-3 certified switches that are robust and compliant. With our 20+ years of experience, we provide reliable, durable, and safe disconnect solutions for solar PV and other demanding DC applications. Get in touch with our experts to find the right isolator for your needs.
To ensure the safety and reliability of photovoltaic systems and other DC installations, it’s crucial to have reliable DC Isolator Switches. LETOP supports system integrators, OEMs, and distributors by providing high-quality, certified DC Isolator Switches backed by comprehensive services designed for B2B partnerships. We understand the need for consistency, flexible, and technical expertise when sourcing these critical safety devices. Partner with us for dependable components and dedicated support.
Rigorous testing ensures each DC Isolator Switch meets its certified performance characteristics, such as switching endurance and safe isolation, critical for the safety and long-term reliability of your systems.
Our production capacity is geared to handle flexible orders for standard DC isolator switch ratings and configurations required by system builders and OEMs.
Benefit from our manufacturing efficiencies to source certified DC isolator switches cost-effectively for your projects and products. Value is delivered.
We've got technical assistance when you select the correct voltage, current rating, pole configuration, and appropriate switching category for your specific PV or DC project
With over 20 years of dedicated experience in manufacturing electrical safety components, LETOP implements rigorous quality control protocols throughout every stage of its production process. This includes important verification steps like operational endurance testing (ensuring longevity over thousands of cycles), IP rating verification (confirming protection against dust and water ingress), and load break capability testing (validating safe interruption of DC current). Our deep, long-standing understanding of diverse DC applications – from residential solar to complex industrial and utility-scale systems – ensures our isolator switches consistently meet the stringent performance and safety demands of installers, system integrators, and OEMs globally.
Here you can find some of your common questions related to DC Isolaotr Switch, which can help answer your doubts.
LETOP offers flexible procurement solutions to meet the needs of different customers. The minimum order quantity for standard products is usually 100 units, while the minimum order quantity for customized products varies depending on the degree of customization, with a minimum order quantity of 500 units. We encourage new customers to start with a small trial order and gradually establish a long-term cooperative relationship.
The regular delivery cycle for standard products is 3-4 weeks. For first-time customized products, it usually takes 6-8 weeks from demand confirmation to first batch delivery (including sample confirmation time). After mass production, the delivery time for subsequent orders of the same customized product can be shortened to 4-5 weeks. The specific time depends on the current production capacity.
LETOP DC isolator switches fully comply with the IEC 60947-3 international standard and have obtained authoritative certifications such as TÜV, CE, and CQC. For specific markets, we can assist you in obtaining other regional certifications, such as North American UL certification, Australian CEC certification, etc. We have a professional certification team that can provide comprehensive certification support services based on the needs of your target market. All products comply with RoHS and REACH environmental protection requirements to ensure sales in major global markets.
LETOP provides a standard 2 year warranty for all DC isolator switches. As an OEM/ODM manufacturer, we adopt a "backstage support" model where you directly interact with the end customer, and we provide comprehensive technical support in the background, including fault diagnosis guidance, spare parts supply and maintenance training. For problems caused by manufacturing defects during the warranty period, we offer free component replacement or whole machine replacement services. Our technical team can remotely assist with on-site problems and can also dispatch engineers to provide support when needed.
Of course. Our experienced R&D team can perform in-depth technical customization to meet your specific application needs. Common customizations include: rated current adjustment (32A-1500A), rated voltage change (up to 1500V DC), enhanced special environmental adaptability (such as IP67 protection level, -40°C low temperature adaptability), special connection methods (such as MC4 interface, copper busbar connection, etc.), and integrated additional functions (such as auxiliary contacts, early warning functions, etc.). Custom development usually requires 2-3 rounds of sample testing, and we will be involved in the entire process and provide technical support.
LETOP provides a full range of brand customization services, including printing your brand logo on the product body, customizing the shell color, designing packaging that matches your brand image, and providing nameplate labels printed with your brand. At the same time, we also provide editable product technical document templates, allowing you to add your own brand elements easily. For important customers, we can even design a unique product appearance based on your brand manual to create a unique market recognition.
Yes, we provide flexible packaging and logistics solutions to meet the needs of different markets and channels. For packaging, we can customize product packaging design according to your brand requirements, from single product packaging to collective packaging. We support a variety of logistics methods, including full container, LCL, air freight and international express. For key customers, we provide VMI (Vendor Managed Inventory) services to maintain safety inventory at your designated warehouse. We can also ship directly to your distribution center or end customer as needed to help you optimize supply chain management and reduce logistics costs.
Yes, we have a high-end series of products designed for extreme environments. These products use special materials and enhanced designs to operate stably in a temperature range of -40°C to +85°C, have excellent anti-UV aging performance, and are dust and water resistant up to IP67. For special applications like coastal areasand high- altitude areas, our products are specially designed to work with low-pressure environments. All extreme environmental products are rigorously tested to ensure long-term reliability.
As your OEM/ODM partner, we provide comprehensive technical support services. This includes product technical training (online or on-site), installation guides and troubleshooting manuals, technical consultation hotlines, and engineer remote support. We can also provide product knowledge training for your sales and technical teams to help them better understand the features and benefits of the product. For long-term partners, we regularly share industry technology trends and product updates to ensure that you are always aware of the latest technological developments.
Product reliability is our primary concern. We have adopted multi-level reliability assurance measures: first, FMEA (failure mode and effect analysis) is carried out during the design phase to identify and eliminate potential risks; second, high-quality components are selected, and all key components are strictly screened; third, comprehensive quality control is implemented during the production process, and there are inspection points at every step; finally, the finished product must pass rigorous testing and verification, including mechanical life testing (more than 20,000 operations), temperature rise testing, overload capacity testing, and accelerated aging testing. Our DC isolating switches are designed to have a life of more than 25 years, which is much higher than the industry average.
If no relevant issues are found, please contact us, E-mail:info@letopv.com.
If you have any questions, please contact us and we will reply within 24 hours.
No. 19, Fenjin Road, Dongfeng Industrial Zone, Yueqing, Wenzhou, China 325604
info@letopv.com
+86-13175631986
