YIY (Zhejiang Yiyen) is an OEM/ODM voltage stabilizer manufacturer in China, producing servo, relay, and IGBT automatic voltage regulators from about 0.5 kVA to 3,000 kVA for private-label brands, importers, and system integrators worldwide. Since 2008 we have shipped from a 30,000 m² facility with 1,000,000+ units annual capacity across 130+ countries.
YIY offers industry-leading servo voltage stabilizers with ±0.5% precision output control.
Our advanced motor-driven technology provides superior voltage regulation with wide input voltage range (80V-280V).
exceptional reliability, and comprehensive protection systems for your critical equipment.
Reliable voltage protection with electromagnetic relay switching technology.
Ultra-fast ＜60ms response time, wide input voltage capability, and reliable performance for general applications.
YIY offers state-of-the-art IGBT technology with digital signal processing for ultra-precise voltage
and frequency regulation. Our advanced stabilizers deliver industry-leading ±0.5% voltage
accuracy,comprehensive protection features, and sophisticated
communication interfaces for your most demanding applications.
YIY is a China-based voltage stabilizer manufacturer producing servo, relay, and IGBT automatic voltage regulators (AVRs) from 0.5 kVA to 3,000 kVA, supplying OEM and ODM customers across 130+ countries with CE/ISO-certified voltage protection solutions. For a buyer-side view, see how YIY compares with other voltage stabilizer manufacturers.
Pick your load, open the matching range, or download the datasheet. Quotes are sent individually — no public price list.
Typical: 0.5–3 kVA, single-phase
See small-capacity range Download datasheetTypical: 5–20 kVA, single- or three-phase
See single-phase range See three-phase range Download datasheetTypical: 3–30 kVA; single-phase SVC/TWS, three-phase large motors SVC-3
See servo range Download datasheetTypical: 30–500+ kVA, three-phase — SVC-3/PRO-3 30–100, PWR-3 45–150, SBW 50+
See three-phase range Download datasheetCVCF 5–10 kVA; larger loads use AVC (single-phase 15–50, three-phase 30–3600 kVA)
See IGBT range Download datasheetSend load list, input voltage range and country — an engineer sizes it for you.
Ask an engineer on WhatsAppYIY extensive automatic voltage regulator portfolio is the result of continuous development since 2008 and market-driven innovation in voltage stabilization technology. We have a wide range of capabilities, from 0.5KVA to 3000KVA. We understand the diverse global market needs and our dedication to providing comprehensive solutions. Our OEM partners can use this technological diversity to address multiple markets with reliable platforms, while still benefiting from our economies of scale and manufacturing expertise.
Precision motor-driven technology provides superior voltage regulation with wide input range and high reliability.
Fast-response relay-based technology with a simple, robust design and wide input voltage capability.
High-precision ultra-fast digital response for sensitive equipment and critical applications.
OEM buyers can jump straight to flagship stabilizer SKUs below, or continue via our hubs for the full series and RFQ.
Image representing residential applications
Image representing industrial equipment applications
Image representing specialized applications of YIY products
YIY custom OEM/ODM services combine engineering experience since 2008 with global brands, transforming conceptual requirements into market-ready voltage stabilization solutions. We can make complete electrical specifications, optimize mechanical design, develop control algorithms, and comply with regulatory regulations. Our engineering team has tons of experience in different markets, so we can handle all sorts of tricky international standards and make our partners’ products stand out with our proprietary technologies. We have helped launch successful AVRs in 130+ countries, each precisely tailored to specific regional requirements, performance standards, and customer expectations.
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yiyen@yiyen.com
YIY is a China-based manufacturer of automatic voltage stabilizers (AVRs) and voltage regulators, producing servo, relay, and IGBT units from 0.5 kVA to 3,000 kVA for industrial, commercial, and residential applications in 130+ countries. As an OEM/ODM supplier, YIY offers custom branding, low minimum order quantities, and full CE/ISO certification for distributors and brand owners worldwide.
Reference: voltage regulator (overview) · IEC standards.
YIY manufactures three core stabilizer technologies. Servo stabilizers deliver plus-or-minus 1-3% output precision for CNC spindles, textile machinery, and medical equipment. Relay stabilizers provide fast step-switching protection with a simple, robust design for general commercial and residential loads. IGBT static stabilizers offer ultra-fast electronic regulation under 20ms for data centres and sensitive electronics.
YIY stabilizers are deployed across industrial manufacturing (motor drives, compressors, CNC equipment), healthcare (MRI, surgical suites), hospitality (HVAC chillers, elevators), and telecommunications (server rooms). Three-phase servo units from 14 kVA to 3,000 kVA are the most common specification for heavy industrial sites with unstable grid supply.
| Capacity | Phase | Typical Application |
|---|---|---|
| 0.5–10 kVA | Single-phase | Home, office, retail electronics |
| 10–50 kVA | Single / Three-phase | Workshops, clinics, commercial HVAC |
| 50–500 kVA | Three-phase | Factories, data centers, hospitals |
| 500–3,000 kVA | Three-phase | Heavy industry, utilities, oil & gas |
| Technology | Typical accuracy | Response | Best for | YIY series examples |
|---|---|---|---|---|
| Servo | ±0.5–3% | ≤1–2 s | Industrial/precision | SBW / SVC / SVC-3 / PRO / TWS |
| Relay | ±5–8% | ≤60 ms | General-purpose | AVR |
| IGBT | ±1% | <10 ms | Sensitive electronics | IGBT lines |
Explore full range → https://www.yiyavr.com/voltage-stabilizer/ · Start OEM project → https://www.yiyavr.com/oem-services/
Further reading: voltage regulator (overview) · IEC standards
A servo stabilizer uses a motorized carbon brush for continuous, stepless voltage corrections achieving plus-or-minus 1-3% accuracy, while a relay stabilizer switches between transformer taps in discrete steps with plus-or-minus 5-8% accuracy, fast response and a simple, robust design. Servo units are preferred for precision loads; relay units suit general-purpose applications. See our servo vs relay selection guide for a full comparison.
Total your connected load in kVA, apply a 1.25-1.5x safety margin, and add a 6-8x inrush multiplier for each motor starter. For detailed sizing steps, see our three-phase stabilizer selection guide and our servo stabilizer three-phase sizing checklist.
YIY stabilizers are CE-marked, ISO 9001:2015 certified, and compliant with IEC 61558. Custom certifications (UL, CB, BIS) are available for OEM projects upon request.
MOQ starts at 1 unit for standard off-the-shelf models and 10-50 units for OEM white-label configurations, depending on kVA rating and custom requirements. Contact the YIY engineering team for a project-specific quotation.
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