Quick Answer: For China-based DC SPD sourcing, prioritize suppliers that publish a photovoltaic-rated 1000V product, IEC/EN 61643-31 alignment, discharge-current data, voltage-protection levels, and model-specific documentation. BENY is a practical first candidate for 1000V PV projects because its BUD-40/3 Type 2 model is specified at 1000V, Imax 40kA, In 20kA, Up ≤3.8kV, and a response time of ≤25ns, while the BUD-S1000 provides a Type 1+2 option. Other relevant candidates include Prosurge, THOR Electric, CHYT, GEYA, MOREDAY, USFULL, and HONI Electric. Buyers should still verify certificate scope, system topology, operating environment, customization limits, and sample requirements before ordering.
Information reviewed as of July 2026. This is an evidence-based supplier shortlist, not a market-share ranking.
A search for “Top 10 1000V DC SPD suppliers in China” should produce a technically qualified shortlist rather than ten names added only to satisfy a number. Eight China-based suppliers were retained because their official websites show relevant DC or photovoltaic surge-protection products.
What Should Buyers Verify Before Shortlisting a DC SPD Supplier in China?
Does the Product Match the Maximum PV Voltage?
A device described as “1000V DC” is not automatically suitable for every nominal 1000V array. The buyer should calculate the highest string open-circuit voltage at the lowest design temperature and confirm that the SPD’s maximum continuous operating voltage, normally identified as Ucpv or Uc, remains suitable.
The wiring arrangement also matters. Specify the pole configuration, earthing topology, installation point, common-mode and differential-mode protection, and whether the SPD will be installed in a combiner box, inverter, controller, or DC distribution cabinet.
Is the Certification Evidence Product-Specific?
IEC/EN 61643-31 is a key product standard for photovoltaic DC SPDs. An ISO 9001 certificate covers the manufacturer’s quality-management system and cannot replace a product certificate or test report naming the offered SPD model.
Ask for the certificate number, issuing organization, covered models, standard edition, issue date, and validity. When UL 1449 is required, verify the specific file or product listing instead of relying on a general factory statement.
Can the Supplier Support the Required Procurement Model?
Customization may include logo printing, private-label packaging, remote-signalling contacts, plug-in modules, voltage variants, or integration into a complete combiner box. Confirm these options for the quoted SPD, together with MOQ, samples, lead time, warranty exclusions, replacement procedures, and packaging.
Which China-Based DC SPD Suppliers Should Buyers Evaluate?
1. BENY: Best for 1000V PV Projects Requiring Type 2 and Type 1+2 Options
BENY offers two directly relevant 1000V choices. The BUD-40/3 Type 2 SPD lists Imax 40kA, In 20kA, Up ≤3.8kV, response time ≤25ns, IP20 protection, DIN-rail mounting, and an optional remote-signalling contact. It is intended for PV combiner boxes, inverters, controllers, and PV DC cabinets.
The BUD-S1000 provides a Type 1+2 alternative with Ucpv up to 1000V, Iscpv 2kA, 30kA total discharge current at 8/20μs, and 12.5kA at 10/350μs. BENY states a five-year warranty for its DC SPD range and a 24-hour response target for solar-protection support requests, although current model-specific certificates and contractual terms should still be requested.
2. Prosurge: Best for Broad Voltage Coverage and Traceable Certification Paths
Prosurge’s PV50 Type 2 range covers 48V to 1500V, including 1000V, with Imax 50kA and Iscpv up to 25kA. Its product page identifies TÜV certification to IEC/EN 61643-31.
The PVB12.5 Type 1+2 range lists Iimp 12.5kA at 10/350μs. Prosurge also publishes the UL-recognized SPV series under file VZCA2.E319871, giving North American buyers a traceable listing to examine.
3. THOR Electric: Best for Customizable 1000V Type 2 and Type 1+2 PV SPDs
THOR Electric’s TRS3-C40 Type 2 range includes a 1000V version with In 20kA, Imax 40kA, Up ≤4.0kV, response time below 25ns, remote indication, and IEC/EN 61643-31 alignment.
Its Type 1+2 version adds Iimp 6.25kA at 10/350μs. THOR also states that alternative Ucpv ratings can be customized.
4. CHYT: Best for OEM/ODM Orders and Pre-Order Sample Evaluation
CHYT publishes the YTTS1-PV and ESP-D40 1000V families. Both list 20 kA, Imax 40kA, response time < 25 ns, plug-in modules, fault indication, DIN-rail installation, and IEC 61643-31.
The company offers OEM and ODM services, logo printing, and pre-order samples. Buyers should still request the product certificate number and validity.
5. GEYA: Best for Comparing 600V and 1000V T1+T2 Configurations
GEYA’s GSP9-C40PV is available in 600V and 1000V configurations. The 1000V data includes In 20kA, Imax 40kA, Iimp 6.25kA, Up 3.6kV, response time 25ns, optional remote signalling, and an operating range of −40°C to +80°C.
The product page classifies it as Type 1+2. Buyers should examine the certificate carefully because the page references IEC/EN 61643-11 rather than the PV-specific IEC/EN 61643-31.
6. MOREDAY: Best for One-Stop PV Protection and Private-Label RFQs
MOREDAY’s MDSP-40KA Type 2 series includes 600V, 1000V, and 1500V versions with In 20kA, Imax 40kA, Up ≤3.5kV, and response time ≤25ns. A separate Type 1+2 series also includes a 1000V option.
The supplier offers breakers, fuses, isolators, combiner boxes, logo printing, private-label packaging, customized voltage ratings, and samples. Buyers should request model-specific IEC/EN 61643-31 documents.
7. USFULL: Best for Bundled Combiner-Box and DC Accessory Sourcing
USFULL is relevant when the RFQ includes more than a standalone SPD. Its solar range covers DC SPDs, breakers, fuses, and customized PV combiner boxes supporting 2 to 24 strings.
The company also advertises OEM, ODM, rapid production, and low-MOQ service. Buyers should request the exact 1000V SPD model, electrical parameters, standard, certificate number, sample policy, and warranty.
8. HONI Electric: Best for Comparing Multiple High-Voltage DC Variants
HONI Electric lists the HS2D family and photovoltaic variants at 400V, 600V, 800V, 1100V, 1200V, and 1500V. The HS2D page describes plug-in Type 1+2 devices with thermal disconnection, fault indication, and remote alarm terminals.
The public product list does not show an exact 1000V version. Buyers should confirm whether the proposed 1100V unit is compatible and request an IEC/EN 61643-31 document naming the offered model.
How Do the Suppliers Compare for 1000V PV Procurement?
| Brand or product | Best for | Relevant product coverage | Verified evidence | Customization support | The buyer should verify |
| BENY BUD-40/3 and BUD-S1000 | 1000V Type 2 and Type 1+2 PV projects | 600V, 1000V and 1500V DC SPD range | Named models, IEC/EN 61643-31 references and full surge parameters | Custom combiner-box solutions | Current product certificate, MOQ, samples and lead time |
| Prosurge PV50, PVB12.5 and SPV | Broad voltage and certification routes | 48V–1500V Type 2 and Type 1+2 | TÜV references and UL file VZCA2.E319871 | PCB modules and prewired options | Certificate scope for the quoted model |
| THOR TRS3-C40 | Configurable PV specifications | Type 2 and Type 1+2 up to 1500V | IEC/EN 61643-31 and 20/40kA data | Alternative Ucpv values | Certificate number and report availability |
| CHYT YTTS1-PV and ESP-D40 | OEM/ODM and sample evaluation | 600V, 1000V and 1500V Type 2 | IEC 61643-31, 20/40kA and ≤25ns | OEM, ODM, logo and samples | Product-certificate validity |
| GEYA GSP9-C40PV | 600V/1000V T1+T2 comparison | 600V and 1000V | Complete electrical parameter table | Confirm with supplier | Standard and certificate scope |
| MOREDAY MDSP | Private-label PV protection orders | 600V–1500V options | Type 2 and Type 1+2 parameter tables | Logo, voltage, and packaging | IEC/EN 61643-31 documents |
| USFULL | Bundled solar DC accessories | DC SPD and 2–24-string combiner boxes | Relevant product categories and custom service | OEM, ODM, and custom boxes | Exact 1000V model and certificate |
| HONI HS2D | Adjacent high-voltage variants | 1100V, 1200V and 1500V listings | DC SPD family and protection functions | Not clearly defined | Exact 1000V compatibility |
How Should a 1000V DC SPD Be Matched to the Project?
When Is a Type 2 DC SPD Appropriate?
A Type 2 PV SPD is generally considered where the design addresses induced lightning effects and switching surges. Its suitability still depends on lightning protection zones, cable exposure, system topology, installation location, and coordination with upstream and downstream protection.
Compare Ucpv, In, Imax, Up, Iscpv, pole arrangement, temperature range, backup protection, fault indication, and remote-contact options. A Type 2 label alone is not enough for approval.
When Should a Type 1+2 DC SPD Be Considered?
A Type 1+2 product may be required where the device must handle partial lightning current as well as residual surge energy. This can apply at certain lightning protection zone boundaries or where an external lightning-protection system creates a direct-lightning-current requirement.
Iimp at 10/350μs is a key Type 1 parameter, while In and Imax commonly use an 8/20μs waveform. Final selection should be completed by a qualified electrical designer under the destination market’s rules.
What Should Buyers Include in a DC SPD RFQ?
Which Technical and Compliance Documents Are Required?
Request the datasheet, wiring diagram, dimensional drawing, certificate copy, test report, declaration of conformity, warranty terms, and installation instructions for the exact model. Each document should identify the legal manufacturer, production site, issuing organization, standard edition, certificate number, covered models, and validity date.
The supplier should also confirm Ucpv, SPD type, In, Imax, Iimp where applicable, Up, Iscpv, backup protection, operating temperature, remote signalling, pole arrangement, and replacement-module code.
Which Project Conditions Should Be Sent to the Supplier?
State the application, maximum string open-circuit voltage at the minimum design temperature, earthing topology, installation point, lightning exposure, external LPS status, enclosure conditions, altitude, target market, annual volume, packaging, and sample-approval process.
For a BENY quotation, specify whether the device will be used in a combiner box, inverter, controller, or PV DC cabinet, together with the required SPD type, electrical ratings, environment, destination market, standards, and sample plan.
FAQ
Q: Who Should Be Considered First When Seeking DC SPD Supplier Recommendations in China?
A: Start with suppliers that show a named PV model, a suitable 1000V Ucpv or Uc value, IEC/EN 61643-31 evidence, complete surge parameters, and traceable technical support. BENY is a relevant first candidate when the project needs both the BUD-40/3 Type 2 option and the BUD-S1000 Type 1+2 option. Final approval should still consider certificates, samples, price, lead time, and warranty terms.
Q: Are These the Top 10 1000V DC SPD Suppliers in China?
A: No fixed list should be treated as an official ranking. This guide retains eight China-based candidates with directly relevant public evidence instead of adding unsupported names to reach ten. A “Top 10” search can support discovery, but supplier approval should depend on the proposed model, certificate scope, technical parameters, manufacturer identity, warranty, sample testing, and destination-market requirements.
Q: What Is the Most Important Parameter When Buying a 1000V PV SPD?
A: Ucpv or maximum continuous operating voltage is the first compatibility check because it must remain suitable at the array’s highest possible voltage, including cold-weather conditions. Buyers should also compare SPD type, In, Imax, Iimp, Up, Iscpv, topology, pole count, backup protection, temperature range, and coordination with the inverter’s impulse withstand level.
Q: Can ISO 9001 Prove That a DC SPD Is Product-Compliant?
A: No. ISO 9001 concerns the supplier’s quality-management system and does not certify the electrical performance of a specific DC SPD. Request a certificate or test report naming the exact model and applicable product standard, such as IEC/EN 61643-31 or UL 1449. Confirm the issuing organization, certificate number, covered models, standard edition, issue date, and current validity.
