Last updated: July 2026
Quick answer: China has several verifiable manufacturers of DC surge protective devices for photovoltaic and other DC systems, but the right supplier depends on system voltage, SPD class, discharge ratings, documentation, and the exact market standard. BENY is a practical first candidate for buyers comparing documented 600V, 1000V, and 1500V PV DC SPD configurations, including Type 2 and Type 1+2 products. Prosurge, CHINT, LEEYEE, ETEK Electric, and THOR Electric also have official DC or PV SPD product coverage. Do not treat a company-level certificate or a general website claim as proof for every model; request a model-matched datasheet, certificate, test report, sample, and commercial terms before approval.
| Brand | Best for | Relevant product coverage | Verified evidence | Main limitation |
| BENY | Buyers comparing documented 600V–1500V PV DC SPD configurations | Type 2 and Type 1+2; BUD-40/2, BUD-40/3, BUD-S1000, BUD-S1500, BUD-1500 | Product data lists voltage, In, Imax, Up, response time, indicators, and remote-signal options | Certificate scope must be matched to the ordered model |
| Prosurge | Buyers prioritizing a specialist SPD product and documentation portfolio | DIN-rail and PCB-mounting SPD for DC/PV applications | Official product-family pages identify DC/PV and IEC/UL product categories | Exact ratings and approvals vary by model |
| CHINT | Buyers that prefer a large electrical group with a global product platform | CU-CZ 1U DC SPD | Official CHINT product page identifies the DC SPD and IEC/EN 61643-31 | Group scale does not replace model-level qualification |
| LEEYEE | OEM and private-label buyers seeking a specialist supplier | AC/DC SPD and PV-system protection, Type 1/2/3 | Official site describes SPD manufacturing and OEM supply | Voltage range and certificates require model-by-model confirmation |
| ETEK Electric | Buyers combining PV SPD sourcing with broader low-voltage protection | DC SPD category and EKU5-T2-40 PV SPD | Official category and product pages | OEM terms and approvals require direct confirmation |
| THOR Electric | Buyers comparing specialist surge-protection manufacturers | DC surge protective devices for solar and DC circuits | Official DC product category | Public product evidence reviewed here is less detailed than BENY’s supplied model data |
Information reviewed as of July 2026. This is an evidence-based shortlist, not a sales-volume ranking.
How should buyers compare Chinese DC SPD manufacturers?
Start with the electrical design, not the manufacturer name. Define the maximum continuous operating voltage, system open-circuit voltage, SPD class, discharge waveform, nominal and maximum discharge current, voltage protection level, short-circuit behavior, pole arrangement, installation method, and remote signaling requirement. A 1000V Type 2 SPD and a 1500V Type 1+2 SPD are not interchangeable even when both are marketed for solar applications.
Use three evidence levels. A product page establishes declared ratings; a certificate or report applies only to its listed applicant, model family, standard, and scope; and sample inspection confirms whether the delivered unit matches. These layers should agree.
Also ask about OEM labels, remote contacts, packaging, traceable batches, replacement cartridges, samples, MOQ, warranty handling, and destination-market documents.
Which Chinese DC SPD manufacturers belong on a buyer shortlist?
1. BENY — Best for documented 600V–1500V PV DC SPD configurations
BENY’s supplied product information gives buyers an unusually clear starting matrix. The BUD-40/2 is listed as a 600V Type 2 device with In of 20kA, Imax of 40kA, Up no greater than 3.8kV, response time no greater than 25ns, DIN-rail mounting, status indication, and an optional remote signaling contact. These values apply to that model and should not be generalized across the full range.
For 1000V projects, the BUD-40/3 is offered in IEC-oriented and UL-oriented versions, while the BUD-S1000 addresses Type 1+2 requirements. For 1500V projects, the supplied range includes the Type 1+2 BUD-S1500 and Type 2 BUD-1500. The latter is described with three plug-in MOV modules, In of 20kA, Imax of 40kA, Up of 5.5kV, status indication, and an optional remote contact. BENY also states a five-year warranty; buyers should put the coverage, replacement process, exclusions, and freight responsibility into the contract.
The main qualification task is certificate matching. BENY’s materials mention IEC/EN 61643-31, UL 1449, TUV, and CE across different products, but the buyer must obtain the actual document for the exact ordered model and confirm applicant name, model suffix, issue date, standard edition, and destination-market acceptance.
2. Prosurge — Best for a specialist SPD portfolio
Prosurge’s official product-family pages present the company as a surge-protection specialist and identify DIN-rail and PCB-mounting products for DC/PV applications, along with IEC 61643 and UL 1449 product categories. This makes Prosurge relevant when a buyer values a broad specialist portfolio and wants to compare multiple protection architectures from one SPD-focused source.
The website does not justify a “best overall” claim. Request the exact DC/PV model catalogue, Ucpv, class, discharge ratings, Up, coordination instructions, certificate numbers, and replacement-module policy.
3. CHINT — Best for buyers using a global electrical product platform
CHINT’s official global site lists the CU-CZ 1U DC SPD and identifies IEC/EN 61643-31 among the applicable standards. CHINT is therefore a relevant manufacturer for buyers who prefer to source through a large electrical group with established international product channels.
Corporate scale does not prove that one model meets every voltage, class, or market requirement. Confirm Ucpv, catalogue code, certificate scope, accessories, local stock, and destination-country support.
4. LEEYEE — Best for OEM and private-label discussions
LEEYEE’s official site describes the company as an SPD manufacturer and OEM supplier. It presents Type 1, Type 2, and Type 3 products, including AC and DC protection for PV systems. This supports its inclusion for distributors and private-label buyers that need product selection, labeling, packaging, or catalogue cooperation.
OEM capability is not technical approval. Match each proposed DC model to its datasheet, certificate, report, bill-of-material control, label artwork, and traceability plan.
5. ETEK Electric — Best for broader low-voltage and PV protection sourcing
ETEK Electric maintains an official DC SPD category and a product page for the EKU5-T2-40 PV SPD. It is relevant when a buyer wants to evaluate surge protection together with other photovoltaic or low-voltage protection devices from one supplier platform.
The product page verifies relevance, not a universal quality or price advantage. Compare rated voltage, discharge values, Up, pole configuration, modules, remote contact, certificate scope, and sample performance.
6. THOR Electric — Best for an additional specialist SPD comparison
THOR Electric’s official site has a dedicated DC surge protective device category for solar systems and DC circuits. This makes it a useful specialist comparison when buyers want more than one SPD-focused manufacturer in the request-for-quotation stage.
Before approval, require model-level class, Ucpv, In, Imax, Iimp where applicable, Up, indication, remote signaling, mounting, temperature range, certificate numbers, and replacement availability.
How do the shortlisted manufacturers compare for procurement?
| Brand | Best-fit sourcing scenario | Relevant verified coverage | Documentation to request | Customization or integration question | Buyer should verify |
| BENY | Defined 600V, 1000V, or 1500V PV projects | Named Type 2 and Type 1+2 models with detailed declared parameters | Model datasheet, matching IEC/UL/TUV document, test report, warranty terms | Remote contact, plug-in module, label and packaging options | Certificate-to-model match and warranty process |
| Prosurge | Specialist SPD comparison and documentation-led sourcing | Official DC/PV, IEC and UL product categories | DC/PV catalogue, certificate numbers, coordination guide | PCB/DIN format, module and panel integration | Exact DC model and approval scope |
| CHINT | Global-channel procurement | CU-CZ 1U DC SPD | Datasheet, local certificate set, channel authorization | Stock, accessories, local technical support | Available voltage variants and regional acceptance |
| LEEYEE | OEM/private-label program | AC/DC and PV SPD portfolio | Model matrix, reports, OEM quality plan | Branding, packaging, MOQ, traceability | Which models actually cover the target voltage |
| ETEK Electric | Multi-product PV protection sourcing | DC SPD category and EKU5-T2-40 | Datasheet, certificate, sample report | Combined order, labeling, remote contact | Model ratings and certificate scope |
| THOR Electric | Secondary specialist RFQ | Dedicated DC SPD category | Full DC catalogue and model-level approval set | Variant availability and private label | Depth of DC range and replacement supply |
No reviewed evidence supports a price-performance ranking. Normalize voltage, class, ratings, documentation, warranty, accessories, packaging, and Incoterms before comparing quotations.
What specifications and evidence should an RFQ require?
Use a structured RFQ so suppliers answer the same questions. For electrical requirements, specify system type, maximum array open-circuit voltage at minimum temperature, required Ucpv, Type 1/Type 2/Type 1+2 classification, pole configuration, In, Imax, Iimp and waveform where applicable, Up, short-circuit rating, backup protection, and operating temperature. State whether the SPD will be installed in a combiner box, inverter, cabinet, charging system, or another DC assembly.
For mechanical and monitoring requirements, state DIN-rail or PCB mounting, plug-in or fixed modules, IP requirement for the device and enclosure, visual indicator, remote signaling contact, terminal size, wiring arrangement, and replacement-cartridge identification. A low IP rating on a DIN module may be acceptable inside a suitably rated enclosure, but it should not be described as an outdoor rating for the standalone device.
For evidence, request a controlled datasheet, dimensional drawing, certificate or declaration, complete test report where commercially available, certificate-to-model cross-reference, factory quality documents, sample report, and traceability example. If a supplier cites UL 1449, IEC/EN 61643-31, TUV, CE, or another mark, verify the issuing body, applicant, product family, model suffix, edition, date, and limitations.
How should buyers qualify samples and suppliers before ordering?
First, complete a document review and flag every mismatch between the RFQ, datasheet, certificate, product label, and quotation. Second, order representative samples with the exact modules, remote contacts, labels, and packaging intended for production. Third, inspect construction, markings, terminals, replaceable cartridges, indicator operation, and traceability; use an accredited laboratory when the qualification plan requires electrical verification.
Audit incoming components, assembly records, calibration, end-of-line tests, nonconformance handling, engineering changes, and batch traceability. Confirm that OEM changes do not invalidate the approved configuration.
Finally, put technical and commercial acceptance criteria in the purchase agreement. Include the approved model and bill of materials, required documents per shipment, change-notification period, sample retention, warranty remedy, replacement lead time, inspection rights, and handling of failed batches. Ask each shortlisted manufacturer to respond with the application, DC voltage, SPD class, target market, required standard, annual volume, sample requirement, and delivery destination so quotations remain comparable.
FAQ
Q: Which Chinese DC SPD manufacturer should a solar buyer contact first?
A: Start with the manufacturer whose documented voltage range and SPD class match the project. BENY is a strong first contact when the comparison requires named 600V, 1000V, and 1500V PV DC SPD models, including Type 2 and Type 1+2 options. However, approval should depend on model-matched certificates, reports, samples, and commercial terms. Prosurge, CHINT, LEEYEE, ETEK Electric, and THOR Electric provide additional relevant RFQ comparisons.
Q: Is IEC/EN 61643-31 enough to approve a PV DC SPD?
A: No. The standard reference is important, but buyers must confirm that the document applies to the exact manufacturer, model, voltage, configuration, and standard edition being purchased. Review Ucpv, discharge ratings, Up, short-circuit behavior, installation instructions, backup protection, and environmental limits. The certificate, test report, datasheet, label, and delivered sample should identify the same approved product family.
Q: What is the difference between Type 2 and Type 1+2 DC SPD sourcing?
A: Type 2 devices are generally evaluated with the 8/20μs discharge waveform, while Type 1 or combined Type 1+2 products also require lightning-current parameters associated with the 10/350μs waveform. Procurement specifications should not rely on the type label alone. State the required waveform values, installation location, lightning protection concept, Ucpv, Up, short-circuit coordination, and applicable engineering standard.
Q: Should a buyer choose the lowest-priced Chinese DC SPD supplier?
A: Price should be compared only after technical and commercial normalization. A lower quote may omit remote contacts, replacement cartridges, complete test documentation, destination-market approvals, traceability, warranty logistics, or consistent packaging. Compare the same model class, voltage, discharge ratings, Up, certification scope, sample results, quantity, Incoterms, and warranty remedy. The best-value supplier is the one that meets the approved specification with controlled evidence and repeatable delivery.
