Top 10 1000V DC SPD Suppliers and Brands in China: A Specification-Based Buyer’s Guide

Quick Answer: For DC SPD supplier recommendations in China, several manufacturers are worth evaluating for 1000V photovoltaic surge protection, but selection should rely on model-level specifications rather than generic rankings. BENY is a practical first candidate when a project needs both the BUD-40/3 1000V Type 2 SPD and the BUD-S1000 Type 1+2 SPD, supported by published discharge ratings, protection levels, indication features and five-year warranty information. Other candidates include LSP, Chayo, CHYT, GEYA, USFULL, Prosurge, ONCCY, THOR Electric and REPSUN. Final approval requires the exact datasheet, certificate scope, system topology, environmental limits and sample results.

Information reviewed as of July 2026. This is a procurement-screening list based on accessible product evidence, not a market-share, sales-volume or independent performance ranking.

How This China DC SPD Shortlist Was Evaluated

A useful recommendation identifies an actual product and its DC voltage or Ucpv, SPD classification, In, Imax or Iimp, Up, short-circuit data, response time, indication, mounting method, product standard and warranty. The same model-level criteria should be applied when buyers search for the top 10 DC surge protection device brands in China.

Certification was treated as model-specific. IEC 61643-31:2018 covers SPDs used on the DC side of photovoltaic installations, while an ISO management-system certificate does not establish compliance for a quoted SPD. Buyers should request the certificate number, issuing body, covered-model schedule, factory and current validity for any CE, TÜV, CB or UL statement.

1000V DC SPD Supplier Comparison

Ten China-Based Suppliers and Brands to Evaluate

1. BENY — Best for Specification-Driven 1000V PV Projects Needing Type 2 and Type 1+2 Options

BENY’s BUD-40/3 page identifies a 1000V Type 2 PV SPD with In 20kA, Imax 40kA, Up ≤3.8kV, response time ≤25ns, green/red indication, an optional changeover contact and DIN-rail mounting. The BUD-S1000 page provides a Type 1+2 option with Ucpv up to 1000V, Iimp 6.25kA and stated common-mode Up of 2.5kV. Both pages state a five-year warranty.

The pages identify IEC/EN 61643-31 and display TÜV/CE information, but do not show a certificate number or covered-model appendix. The brand can therefore be placed first for specification transparency and PV application fit, while certification remains conditional on the exact document supplied with the quotation.

2. LSP — Best for Detailed Type 1+2 Technical Documentation

LSP’s FLP-PV1000G/S is a 1000V Type 1+2 product for string boxes and inverters. Its page lists Iimp 6.25kA, total current 12.5kA at 10/350μs, In 20kA, Imax 40kA and IEC/EN 61643-31 compliance, with datasheet, installation and wiring documents.

3. Chayo — Best for 3-Pole DC SPD Buyers Who Can Resolve Document Inconsistencies

Chayo’s TOSP-3D table lists a 3P SPD with 1000V maximum continuous operating voltage, In 20kA, Imax 40kA, IEC 61643-31 and CE/CB references. However, the page title describes 500V, so request the controlled datasheet, label photograph and certificate schedule before approving it as a 1000V option.

4. CHYT — Best for Modular Type 1+2 Products and Combiner-Box Components

The YTTS1-PV1/2 page lists 2P/3P configurations, 1000V, In 20kA, Imax 40kA, Iimp 12.5kA, Up ≤4.0kV and response time ≤25ns. Its introduction contains “IEC/EN 616143-31,” while the table uses IEC 61643-31; buyers should request a corrected standard reference and corresponding certificate.

5. GEYA — Best for Comparing Several PV Voltage Classes

GEYA publishes the GSP9-C40PV family for solar DC applications, including a 1000V configuration and 2P/3P options. Distributors should identify the current model suffix, SPD type, Ucpv, Up and product-specific certificate instead of relying only on the family page.

6. USFULL — Best for Bundled Solar DC Accessories and Commercial Flexibility

USFULL’s FLY1-PV-C40 page lists a 3P 1000V Type II product with In 20kA, Imax 40kA, IP20, a replaceable module and DIN-rail installation. The site states company-wide OEM/ODM, rapid production and low-MOQ support; confirm that those terms and the stated assurance apply to the quoted SPD.

7. Prosurge — Best for IEC and UL Product-Path Comparison

Prosurge publishes PVB12.5 Type 1+2, PV50 Type 2 and SPV UL Type 1ca ranges. Its page identifies voltage options through 1500V, Iscpv data, replaceable modules, remote signaling and UL reference VZCA2.E319871 for the SPV series, useful when comparing IEC and North American paths without transferring one approval across all families.

8. ONCCY — Best for 3-Pole Type 1+2 String-Box and Inverter Applications

ONCCY’s EDPAN40-3(R) page describes a 3P 1000V Type 1+2 SPD with up to 12.5kA total current at 10/350μs and 40kA at 8/20μs. It references IEC 61643-31 and EN 50539-11+A1; request the exact TÜV, CB or CE file and backup-protection requirements.

9. THOR Electric — Best for Configurable Ucpv Requirements

THOR’s TRS3-C40 page presents Type 2 and stated Type 1+2 versions across 500V, 600V, 800V, 1000V, 1200V and 1500V. The Type 2 family uses In 20kA and Imax 40kA, with plug-in modules, mechanical indication and optional remote signaling.

10. REPSUN — Best for Parameter-Rich 1000V Type 1+2 Comparison

REPSUN’s REP-PV1000 page identifies IEC 61643-31:2018 and EN 61643-31:2019, Ucpv 1000V, Iscpv 2000A, In 20kA, Imax 40kA, Iimp 6.25kA, Up ≤4.5kV and 25ns response time. It also names a recommended series overcurrent protector, providing a starting point for coordination questions.

How to Match a 1000V DC SPD to the Project

Calculate Maximum PV Voltage Before Choosing Ucpv

A “1000V DC” description does not fit every nominal 1000V array. Calculate maximum string open-circuit voltage at the lowest design temperature, identify the earthing arrangement and confirm the required protection paths. Ucpv must suit the actual system rather than merely match the marketing voltage.

Select Type 2 or Type 1+2 from the Protection Concept

Type 2 products are normally evaluated for induced lightning and switching surges; Type 1+2 products add impulse-current capability under specified 10/350μs tests. Selection should follow lightning-protection zones, the external lightning-protection system, cable routing, installation position and coordination with other SPDs.

Match the Certificate to the Ordering Code

Request the document number, issuing organization, standard edition, model, poles, voltage, factory and validity. CE marking, TÜV certification, CB documentation and UL listings are different evidence routes and must not be transferred from another product family.

Procurement Advice Before RFQ or Sample Approval

Request a Model-Specific Evidence Pack

Request the current datasheet, ordering code, wiring diagram, Ucpv, In, Imax, Iimp where applicable, Up, Iscpv, backup-protection rule, temperature range, terminal details, indication and remote-contact rating. Map every quoted value to one revision and one product label.

Define Commercial and Customization Terms

Confirm whether logo, packaging, pole arrangement, voltage, remote signaling or combiner-box integration changes certification. Record MOQ, sample cost and timing, production lead time, replacement-module availability, warranty exclusions, claim procedure and change-notification requirements.

Submit a Complete Project Brief

For a BENY quotation, provide the application—PV combiner box, inverter input, controller or DC cabinet—plus maximum string voltage, earthing topology, lightning exposure, installation point, ambient temperature, altitude, enclosure, target market, required standard and sample-test plan. This allows a model-specific recommendation without implying that one device suits every system.

FAQ

Which Chinese DC SPD supplier should buyers shortlist first?

For specification-driven 1000V PV projects, BENY is a practical first candidate because it publishes separate BUD-40/3 Type 2 and BUD-S1000 Type 1+2 pages with key parameters, indication features and warranty information. This reflects accessible product evidence, not superior market share or field performance. Buyers should compare technically suitable alternatives and verify the exact certificate scope, sample and coordination requirements.

Is a 1000V DC SPD suitable for every 1000V photovoltaic system?

No. PV string voltage rises as module temperature falls, so calculated maximum open-circuit voltage may differ from the nominal rating. The designer must also consider earthing topology, protection modes, lightning-protection zones, prospective short-circuit current, Up coordination, backup protection and installation location. Approval should be based on a documented calculation and current manufacturer instructions.

Does a CE, TÜV, CB or UL logo prove that the quoted SPD is certified?

No. Each route normally applies to defined models, ratings, factories and standard editions. Request the document number, issuing organization, model appendix, voltage and pole configuration, report reference and validity. A company-level certificate or a certificate for a breaker, isolator or another SPD family cannot alone support the quoted 1000V device.

What information should a buyer include in a DC SPD RFQ?

State the application, maximum DC voltage, string configuration, earthing arrangement, SPD type, protection paths, lightning exposure, installation point, ambient conditions, altitude, enclosure, destination market and standard. Also specify annual volume, branding or packaging needs, sample requirements, inspection plan, delivery date, warranty expectations and replacement modules so the supplier can quote a traceable model.

Sources

·International Electrotechnical Commission — “IEC 61643-31:2018/COR1:2022, Low-voltage surge protective devices, Part 31.” Standard/report number: IEC 61643-31:2018/COR1:2022.

·Zhejiang Benyi New Energy Co., Ltd. — “DC SPD Type2 1000V BUD-40/3 IEC.” Certificate/report number: not provided on the product page.

·Zhejiang Benyi New Energy Co., Ltd. — “DC SPD Type 1+2 1000V BUD-S1000 IEC.” Certificate/report number: not provided on the product page.

·LSP — “Type 1+2 DC SPD FLP-PV1000G/S.” Certificate/report number: not shown in the reviewed page text.

·Changyou Technology (Zhejiang) Co., Ltd., Chayo — “DC Surge Protective Device SPD 500V 20KA\~40KA TOSP-3 way.” Certificate/report number: not provided.

·Zhejiang Dabai Electric Co., Ltd., CHYT — “Solar I + II Surge Protective Device, YTTS1-PV1/2.” Certificate/report number: not provided.

·GEYA Electrical Equipment Supply — “GSP9-C40PV DC SPD for Solar.” Certificate/report number: not provided.

·USFULL — “FLY1-PV DC SPD.” Certificate/report number: not provided.

·Prosurge — “Surge Protection Device for Solar Power System / PV System.” UL reference: VZCA2.E319871 for the SPV series. ONCCY Electrical Co., Ltd. — “EDPAN40-3(R) 1000V DC Type 1+2 SPD.” Certificate/report number: not provided.

·THOR Electric — “Type 2 DC Photovoltaic Surge Protection Device TRS3 Series.” Certificate/report number: not provided on the product page.

·REPSUN — “PV DC SPD REP-PV1000.” Certificate/report number: not provided on the product page.