Type 2 and Type 1+2 DC SPD Surge Protective Device Manufacturer, Your Trustworthy B2B Partner.
LETOP, as an industry expert in surge protectors, is constantly striving for advancements in surge technology. We developed surge chips compatible with AC and DC environments and built our own MOV factory. We have 3 semi-automated and 1 fully automated production lines, providing precise control over the production cycle and product quality of each batch of orders. We have also built a lightning protection laboratory certified by TÜV Rheinland Germany, and our technical standards for surge protective devices are higher than the industry average.
Compact, pluggable design, allows for easy installation within various combiner box enclosures.
Fully compliant with key international standards IEC/EN 61643-31 & GB/T 18802.31 for PV SPDs.
Varistor voltage limiting technology, low residual voltage design. Effectively diverting surge energy away from protected equipment within the combiner box.
Safe replacement of a worn varistor insert possible without disconnecting the device. Clear visual fault indication and optional remote signal.
A wide range of SPD types (T2, T1+T2) and voltage levels (600V / 1000V / 1500V) to meet the needs of combiner boxes of different sizes and protection levels.
Standard surge protection for most residential, commercial, and utility-scale combiner boxes against indirect lightning strikes and switching surges.
In/Imax[8/20μs]:
20kA/40kA
Voltage:
500V, 600V, 800V, 1000Vdc
Max. Backup Fuse:
63A gPV Fuse
In/Imax[8/20μs]:
20kA/40kA
Voltage:
1000V, 1200V, 1500Vdc
Max. Backup Fuse:
63A gPV Fuse
In/Imax[8/20μs]:
20kA/40kA
Voltage:
500V, 600V, 800V, 1000Vdc
Response Time:
≤25ns
In/Imax[8/20μs]:
20kA/40kA
Voltage:
1000V, 1200V, 1500Vdc
Response Time:
≤25ns
In/Imax[8/20μs]: 20kA/50k
limp[10/350μs]:
9kA
Voltage:
600V, 800V, 1000V, 1200V, 1500Vdc
Max. Backup Fuse:
125~160A gPV Fuse
In/Imax[8/20μs]: 20kA/50k
limp[10/350μs]:
6.25kA
Voltage:
600V, 800V, 1000V, 1200V, 1500Vdc
Max. Backup Fuse:
125A gPV Fuse
In/Imax[8/20μs]: 20kA/50kA
limp[10/350μs]:
9kA
Voltage:
600V, 800V, 1000V
Max. Backup Fuse: 125~160A gPV Fuse
In/Imax[8/20μs]: 20kA/50k
limp[10/350μs]:
6.25kA
Voltage:
1200V, 1500Vdc
Max. Backup Fuse:
125A gPV Fuse
Provides protection against direct lightning currents, suitable for installations with external lightning protection systems or high-risk locations.
Utilizes robust Metal Oxide Varistors for fast response and high surge energy absorption.
Integrated safety feature isolates the SPD from the circuit before overheating occurs at end-of-life.
Window indicator changes color (green to red) when the module needs replacement, visible within the combiner box.
Dry contact output enables integration with SCADA or monitoring systems for proactive maintenance alerts (ideal for large systems).
Include reliable therma disconnect device, makes it quick and easy to replace MOV modules.
Saves valuable space within the combiner box enclosure, allowing for more flexible layouts.
Partner with LETOP for high-performance, compliant DC SPD tailored for solar combiner boxes. Contact us for Reliable Supply, Competitive Pricing, and Expert Integration Support.
LETOP is committed to providing compliant, reliable and efficient SPD solutions for manufacturers and integrators. We are well aware of the key role of combiner boxes in photovoltaic systems. Through quality control, large-scale delivery and in-depth application support, we ensure that your products are always competitive in surge resistance from design to mass production.
Rigorous testing ensures every SPD component meets specifications, contributing to the overall quality and reliability of your final combiner box product.
Our engineers help you select the correct SPD type (T1/T2), voltage (Uc), and protection level (Up) based on your specific combiner box design and project requirements.
Our production capabilities support flexible orders. With our manufacturing expertise to cost-effectively make high-quality SPDs.
Efficient order processing and shipping to meet your production schedules.
We independently develop and manufacture our MOV chips, combining DC standard processes with high-resistance layer protection to ensure excellent stability. Our fully automated soldering process with 100% product inspection guarantees consistency and quality. Our internal laboratory (UA-certified by the German Rhine Institute) is equipped with advanced testing equipment, including 8/20μs (20kA) and 10/350μs (50kA) lightning simulation test platforms.
Here you can find some of your common questions related to DC SPD, which can help answer your doubts.
DC SPDs are specifically designed for DC circuits, with distinct arc-extinguishing and DC voltage withstanding capabilities compared to AC SPDs. While AC SPDs handle periodically changing currents, DC SPDs must manage continuous DC current with higher arc-extinguishing requirements. They are primarily used in DC systems such as photovoltaic installations, energy storage systems, and electric vehicle charging stations.
Install DC SPDs at key locations near protected equipment, including pv combiner boxes, DC input terminals of inverters, DC bus side of energy storage systems, and DC distribution cabinets. Make sure the installation is as close to the protected equipment as possible while keeping the shortest possible grounding path to keep the residual voltage down.
Our MOQ is according to the product and customized service. Please check services. You can also consult our expert team.
LETOP DC SPDs have visual fault indicators (green for normal operation, red for fault) and/or remote signaling contacts. When an SPD fails after absorbing a large surge, the indicator window changes color and the remote contact sends an alarm signal. Users should check indicators regularly and connect to remote monitoring systems for timely detection and replacement of failed units.
LETOP DC SPDs are engineered for harsh environments using high-performance materials and advanced sealing techniques, with extensive environmental testing. When operated within specified temperature and humidity ranges, performance and lifespan remain unaffected.
Yes, LETOP welcomes special customization requests including non-standard dimensions, custom housing colors, specialized terminal configurations, and integrated functional modules. Our R&D team looks at feasibility and comes up with custom solutions.
For 900V systems, we recommend selecting an SPD with 1000V maximum continuous operating voltage (Uc/Ucpv), providing adequate safety margin. While 1500V SPDs are compatible, they may be more expensive and potentially less effective in terms of residual voltage protection (Up) compared to the more appropriately matched 1000V units. Selection should consider system parameters including maximum open-circuit voltage and short-circuit current.
LETOP's main advantage is our MOV chip core technology, which gives us superior performance across a wide range of voltages and excellent DC arc-extinguishing abilities. Our automated production lines and German Rhine Academy UA Laboratory-certified testing facilities ensure consistent quality and rigorous performance verification.
DC SPDs should be installed in combiner boxes, inverter DC inputs, and DC distribution boxes. We provide detailed installation manuals and application guides with detailed mounting locations, wiring diagrams, and grounding requirements to ensure optimal protection.
LETOP hooks it up with a standard 18-month warranty. After-sales support includes product consultations, technical support, fault diagnosis, failure analysis, and replacement services, with commitment to getting back to customers quickly and providing professional customer support.
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
