If you are looking for an automatic transfer switch manufacturer, ATS factory or long-term ATS supplier, the first question is not simply who can quote a transfer switch. The real procurement question is whether the supplier can match your electrical system, document the exact configuration, approve a sample and keep the approved specification consistent in bulk and repeat orders.
LEEYEE currently publishes the compact ATS-63 automatic transfer switch range for OEM buyers, distributors, panel builders and backup-power projects. The published range covers 6A–63A, 2P and 4P configurations, AC110V / AC220V / AC400V, 50/60Hz, PC class and DIN-rail mounting.[1]
Índice
Quick Answer: Is LEEYEE the Right ATS Supplier for Your Project?
LEEYEE is currently a practical sourcing option when you need a compact 6A–63A, 2P or 4P, PC-class DIN-rail ATS and want to confirm the product for OEM, distribution or panel integration. Start with the electrical configuration, then verify the exact model, dimensions, wiring, documents and sample before approving bulk production.
Already sourcing an ATS? Send the system voltage, load current, phase arrangement, normal source, backup source, quantity and OEM requirements. LEEYEE can first confirm whether ATS-63 falls inside the required project scope.
Current LEEYEE Automatic Transfer Switch Supply Scope
A manufacturer page should make the available product range easy to verify. The table below is based on the currently published ATS-63 product data rather than on a broader unverified catalogue claim.[1]
| Especificação | Published ATS-63 data | Significado do comprador |
|---|---|---|
| Corrente nominal de funcionamento | 6 / 10 / 16 / 20 / 25 / 32 / 40 / 50 / 63A | Select by actual load and protection design, not only by a familiar catalogue rating |
| Rated working voltage | AC110V \/ AC220V \/ AC400V | Confirm the actual system voltage for both sources |
| Frequência | 50/60Hz | Both source conditions should match the intended ATS configuration |
| Postes | 2P \/ 4P | Choose according to phase arrangement, neutral treatment and project requirements |
| Classe | PC | Do not assume ATS-63 is a CB-class transfer switch |
| Categoria de utilização | AC-31B | Check the actual connected load and duty before approval |
| Tempo de comutação de transferência | <50 ms | This is switch transfer time, not the complete generator-start restoration time[2] |
| Corrente de curto-circuito nominal Iq | 5kA | Project short-circuit protection and coordination still require engineering review |
| Insulation / impulse rating | Ui 690V / Uimp 8kV | Use the actual datasheet values in project verification |
| Grau de proteção | IP30 | Check the final enclosure and installation environment |
| Montagem | Instalação em trilho DIN | Useful for compact panel integration when dimensions and terminal access fit |
Which Requirements Fit ATS-63 — and Which Need Separate Confirmation?
For B2B sourcing, a clear limitation is more useful than an oversized product claim. Use this table as an initial qualification step, then confirm the actual project conditions.
| Your requirement | Current published position | Próxima ação |
|---|---|---|
| 6A–63A compact ATS | Inside published ATS-63 range | Confirm voltage, poles, load and installation |
| Single-phase system | 2P option published | Confirm the actual conductor and neutral switching arrangement |
| Three-phase + neutral system | 4P option published | Confirm neutral switching and earthing arrangement |
| DIN-rail panel | DIN-rail mounting published | Check dimensions, wiring space and terminal access |
| Utility + generator backup | Application supported when parameters match | Confirm generator start/control sequence separately |
| Utility + inverter backup | Possible when the AC sources and system arrangement are compatible | Confirm inverter output, voltage, frequency, neutral and transfer logic |
| Above 63A | Outside current published ATS-63 range | Request separate product availability confirmation |
| 3P ATS | Not currently published for ATS-63 | Do not specify without written confirmation |
| CB-class ATS | ATS-63 is published as PC class | Use a separately confirmed solution if CB class is required |
| Closed transition or zero-interruption load | Not established by ATS-63 data | Use an engineered solution designed for that requirement |
What Should an Automatic Transfer Switch Manufacturer Confirm Before Quotation?
A useful ATS quotation begins with the electrical system. If a supplier quotes only from “I need a 63A ATS,” important conditions can remain unresolved until the sample or installation stage.
State the real operating voltage and 50/60Hz requirement for both normal and backup sources.
Provide normal current and identify motors, pumps, compressors or other significant inrush loads.
State whether the system is single-phase or three-phase and how neutral must be treated.
Identify utility, generator, inverter or second AC source and the intended operating sequence.
Provide available DIN-rail space, conductor access, enclosure conditions and relevant dimensional limits.
State the destination market and the exact standard, certificate, report, manual or tender document required.
How to Audit an ATS Manufacturer or ATS Factory
Buyers comparing an ATS manufacturer in China, an automatic transfer switch factory or another long-term supplier should connect every commercial claim to something that can be checked. The goal is not to collect the most certificates or factory slogans; it is to know exactly what product will be approved and shipped.
What Can Buyers Verify About LEEYEE ATS Supply Online?
Before sending an RFQ, buyers can already verify several parts of the current LEEYEE ATS offer through the website. This reduces the gap between a manufacturer claim and a model-specific sourcing decision.
The product page publishes current, voltage, poles, frequency, class, AC-31B category, switching time, dimensions and installation conditions.[1]
The ATS-63 product page includes a wiring-diagram section so the project can be checked beyond a product photo.[1]
LEEYEE maintains a separate ATS selection guide covering source transfer, 2P/4P, current, voltage and backup-source considerations.[2]
ATS is positioned inside LEEYEE’s wider Switching & Isolation and low-voltage product structure rather than as an isolated informational topic.
ATS Standards and Documentation Buyers Should Verify in 2026
IEC 60947-6-1:2026 is the current fourth edition of the IEC standard for transfer switching equipment. IEC states that the document applies to transfer switching equipment used to transfer a load between power sources and includes automatic transfer switching equipment, stand-alone ATS controllers, bypass/isolation TSE and ATSE with closed-transition capability. The fourth edition was published on 2 April 2026 and replaces the 2021 third edition.[3]
This does não mean that every automatic transfer switch referring to IEC 60947-6-1 is certified to the 2026 edition. For an IEC-oriented project, verify the actual model-specific certificate, test report or manufacturer documentation and check the edition, model scope and electrical ratings.
For North American projects, UL Solutions identifies UL 1008 for automatic transfer switches used in emergency systems and optional standby systems.[4] If UL 1008 is mandatory, request explicit model-specific UL evidence. A CE document, IEC reference or generic supplier statement should not be treated as equivalent evidence.
OEM Automatic Transfer Switch Supply: From Requirement to Approved Sample
For an OEM automatic transfer switch order, electrical configuration comes before logo and packaging. LEEYEE’s ATS-63 product page states that customized services are available, but the exact customization scope for a specific order should be confirmed in the quotation and approved sample.[1]
1. Confirm the electrical configuration
Record the approved current, voltage, frequency, pole configuration, class, wiring arrangement and installation conditions. If any required parameter falls outside the published ATS-63 range, resolve it before artwork or packaging work begins.
2. Approve the model and product identity
Confirm the model number, rating information, buyer SKU and any private-label naming. Technical information printed on an OEM label must remain consistent with the approved product specification.
3. Approve label, manual and packaging requirements
Logo, product label, nameplate, instruction material, individual box, outer carton and SKU/barcode requirements can be included in the OEM discussion. Exact availability should be confirmed item by item rather than assumed.
4. Freeze the approved sample
The accepted sample should become a practical reference for bulk production. Keep its model, label, packaging artwork and relevant document version linked to the purchase order or approval record.
Sample Approval Checklist Before Bulk Ordering
A sample should answer more than “Does the product turn on?” For OEM and distribution programs, use it to confirm the points that later need to stay consistent.
| Verificar | O que verificar | Useful approval record |
|---|---|---|
| Identidade do produto | Model, current, voltage, poles and product label | Approved photo + specification |
| Compatibilidade mecânica | Dimensions, DIN-rail fit and terminal access | Drawing + panel check |
| Transfer operation | Normal/backup source switching under the agreed test conditions | Agreed functional check |
| Wiring information | Terminal identification and the intended project wiring arrangement | Approved wiring document |
| OEM presentation | Logo, nameplate, SKU/barcode, manual and packaging | Approved artwork files |
| Compliance package | Required document and exact applicable model scope | Verified document set |
Regra prática: do not release a customized bulk order from a quotation and product photo alone. Freeze a defined sample/specification package first.
How Should Batch and Repeat-Order Consistency Be Controlled?
Long-term distribution depends on repeatability. Before the first bulk order, agree which product characteristics must remain fixed and how a change will be handled. The exact LEEYEE inspection method for a specific ATS order should be confirmed in the commercial and quality documents rather than assumed from this page.
The shipped model, current rating and pole configuration should match the approved order specification.
Relevant ratings and functional requirements should remain aligned with the approved model.
Private-label artwork, ratings, model designation and SKU information should match approved files.
Confirm manuals, individual packaging, accessories and outer-carton requirements for repeat orders.
Track the datasheet, wiring information and compliance documents used for the approved order.
Define which electrical, mechanical, labeling or documentation changes require buyer re-approval.
Where Is a Compact 6A–63A Automatic Transfer Switch a Good Fit?
LEEYEE positions ATS-63 for compact backup-power applications such as generator backup, control panels, small distribution systems and light commercial systems.[1] Selection still depends on the actual electrical parameters and load requirements.
Generator backup
ATS-63 can be used between utility power and generator backup when the voltage, current, poles, wiring and control arrangement are compatible.[1] The published <50 ms value is the transfer switching time of the ATS; generator starting and stabilization time is separate.[2]
Quadros de distribuição compactos
DIN-rail mounting and 2P/4P options can suit compact distribution assemblies where the electrical configuration and panel layout match the ATS-63 data. Check enclosure conditions, dimensions and protective coordination before finalizing the panel.
Armários de controlo
The compact format can support backup switching for suitable cabinet circuits. Motor, pump or other high-inrush loads require additional load review rather than selection by nominal current alone.
Compatible inverter or solar backup systems
LEEYEE’s ATS selection guide includes inverter and solar backup applications.[2] Confirm inverter AC output, voltage, frequency, neutral/earthing arrangement and transfer behavior before approving the ATS.
Where LEEYEE fits best today: buyers sourcing a compact 6A–63A, 2P/4P, PC-class DIN-rail automatic transfer switch with model confirmation, OEM discussion and repeat-order requirements.
Where separate engineering or product confirmation is needed: higher-current ATS, 3P, CB-class, closed-transition, zero-interruption, hospital/data-center critical-transfer or market-specific certification requirements not established by the current ATS-63 documentation.
How MOQ, Bulk Pricing and Lead Time Should Be Confirmed
There is no responsible single MOQ, price or lead-time number that applies to every ATS order. Commercial terms can change with model, quantity, packaging, OEM artwork, documentation, sampling and destination market.
For a comparable quotation, request pricing against a defined configuration. A standard 2P ATS order and a private-label 4P order with customized packaging are different supply requirements.
ATS RFQ Checklist: What Should You Send to the Manufacturer?
A complete RFQ helps an automatic transfer switch supplier confirm the configuration faster and reduces the risk of approving the wrong sample.
Voltage, frequency, rated load current, load type, single/three phase and required pole arrangement.
Normal source, backup source, source priority and relevant generator or inverter control information.
Panel type, available space, DIN-rail arrangement, wiring constraints and environment.
Destination country and required standard, certificate, report, datasheet, manual or tender document.
Sample quantity, estimated bulk quantity, repeat-order plan and requested delivery schedule.
Brand, label/nameplate, SKU/barcode, manual language, individual box and outer-carton requirements.
Need an ATS model check before sampling? Send the RFQ information above. LEEYEE can compare the requirement with the current ATS-63 range and identify which points still need technical or commercial confirmation.
FAQ for OEM, Distributor and Project Buyers
What automatic transfer switch range does LEEYEE currently publish?
LEEYEE’s current ATS-63 product page lists 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A and 63A options, with AC110V / AC220V / AC400V, 50/60Hz, 2P or 4P, PC class and DIN-rail mounting.[1]
Does LEEYEE supply 2P and 4P automatic transfer switches?
Yes. The published ATS-63 range includes 2P and 4P versions.[1] The final choice depends on the actual system and neutral-switching requirements.
Does LEEYEE currently publish a 3P ATS?
Not in the ATS-63 data used for this page. The published pole options are 2P and 4P.[1] A 3P requirement should therefore be confirmed separately before specification or quotation approval.
Is LEEYEE ATS-63 PC class or CB class?
ATS-63 is published as PC class with utilization category AC-31B.[1] This page does not claim a CB-class ATS-63 configuration.
Can LEEYEE supply an ATS above 63A?
The current published ATS-63 range stops at 63A.[1] Requirements above 63A should be submitted for separate availability confirmation rather than assumed from this manufacturer page.
O ATS-63 pode ser usado para backup de gerador?
Can I use the <50 ms transfer time as the total generator backup time?
Can I order an OEM or private-label automatic transfer switch?
LEEYEE’s ATS-63 product page states that customized services are available.[1] Send the required label, nameplate, manual, SKU/barcode and packaging details so the exact customization scope can be confirmed before sample approval.
Which IEC standard should an ATS buyer verify in 2026?
The current IEC edition is IEC 60947-6-1:2026, Edição 4.0, publicado a 2 de abril de 2026.[3] A reference to the standard does not by itself prove that a particular ATS is certified to that edition, so verify the actual product-document scope.
Does LEEYEE ATS-63 have UL 1008 certification?
This page does not claim UL 1008 certification for ATS-63. If UL 1008 is mandatory for your project, request model-specific evidence before approval. UL Solutions identifies UL 1008 as a relevant standard for automatic transfer switches used in emergency and optional standby systems.[4]
What information should I send for an ATS quotation?
Send the system voltage and frequency, load current and load type, phase and pole requirement, normal and backup sources, installation constraints, destination market, required documentation, quantity and OEM requirements.
Referências
- LEEYEE. Automatic Transfer Switch for Solar & Home Backup | LEEYEE 2P/4P ATS. Official ATS-63 product page. Published data includes 6A–63A, 2P/4P, AC110V/220V/400V, 50/60Hz, PC class, AC-31B, <50 ms transfer switching time, Iq 5kA, Ui 690V, Uimp 8kV, IP30, dimensions and DIN-rail mounting.
- LEEYEE. O que é um comutador automático de transferência? Como funciona o ATS e como escolher. Technical selection guide covering ATS function, 2P/4P selection, current, voltage, backup sources and the distinction between ATS switching time and generator start/recovery time.
- Comissão Eletrotécnica Internacional. IEC 60947-6-1:2026, Edition 4.0 — Low-voltage switchgear and controlgear – Part 6-1: Multiple function equipment – Transfer switching equipment. Publication date: 2 April 2026. IEC states that the fourth edition cancels and replaces the third edition published in 2021.
- UL Solutions. Serviços de certificação e avaliação de comutadores. UL Solutions lists UL 1008 for automatic transfer switches used in emergency systems and optional standby systems.
