What is the price and minimum order quantity (MOQ)?

Price depends on power and customization. MOQ is lower for standard specs (e.g., 100pcs) and higher for custom molds (e.g., 500-1000pcs). Larger quantities reduce unit price.

How long does delivery take?

Standard products take 10-15 working days. New customizations require an additional 5-7 days for sample confirmation. Large orders may take 15-30 days.

Can you provide samples and how are they charged?

Samples are available for serious customers. A sample fee is usually required but can be refunded or deducted after a bulk order. Sample lead time is 3-5 days.

What are common reasons for transformer failure and do you provide warranty?

Common causes include overload, short circuits, and harsh environments. We provide a 1-year warranty and will repair or replace free for quality issues.

Low Frequency Step up 12V to 220V 50Hz 60Hz Ei Step Down Transformer

Name: Low Frequency Step up 12V to 220V 50Hz 60Hz Ei Step Down Transformer
Brand: Hangzhou Udwells Technology Co., Ltd.
SKU: 2230879695

Zhejiang, ChinaHangzhou Udwells Technology Co., Ltd.

US$0.50-1.50

500 Pieces

Product profile

Customization

Available

Application

Power, Electronic, Instrument, Lighting, Rectifier, Audio

Phase

Single

Model NO.

Core

Core-type Transformer

Cooling Method

Dry-type Transformer

Winding Type

Multi-winding Transformer

Certification

ISO9001

Usage

Single-phase Transformer

Frequency Characteristics

Low Frequency

Shape of Core

Operating Temperature

-40ºCTO +125ºC

Storage Temperature

-25ºCTO+85ºC

Customize

Yes

Type

Ei/Toroidal

Installation Method

Vertical/Horizontal/with a Base/with a Cover

Transport Package

Export Standard Carton and Strong Pallet

Specification

EI Series Low Frequency Transformer

Origin

Zhejiang

Production Capacity

200000 PCS/Month

Key features

Wide Power Range: Available from 0.3VA to 2000VA with various EI core sizes.

Customizable Design: Offers full customization including voltage, frequency, and installation methods.

High-Quality Materials: Uses new high-grade silicon steel sheets and 100% pure copper wire.

Strict Quality Testing: 100% inspection including Hi-Pot, inter-winding, and load tests before shipment.

ISO9001 Certified: Manufacturing process meets international quality management standards.

Multiple Core Types: Provides both EI-type and Toroidal transformer options for different needs.

Shielding Option: Optional copper foil shielding layer to suppress electromagnetic interference.

Company profile

High Repeat Buyers ChoiceFast DeliveryPrivate MoldQuality Assurance

Hangzhou Udwells Technology Co., Ltd.

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 3 Years CertifiedNearest Port: Shanghai Port, Ningbo PortAverage Response Time: ≤4.96h

AI-Powered supplier vetting

SummaryHANGZHOU UDWELLS TECHNOLOGY CO. Ltd. was founded in 2008 and reports a self-built plant exceeding 15,000 square meters, more than 10 production lines, Europe as a primary export market, and peak-season order fulfillment within 15 working days. It provides multiple customization options, ODM services, and has launched new products within the past year. The supplier also reports OEM service for well-known brands and quality assurance in its quality-control processes. However, no R&D audit documentation, SDK, approved-supplier list, written service procedures, corrective/preventive-action procedures, or complaint-handling procedures were available. Overseas warehouses, showrooms, agents or branches, and offline trade-show participation were not reported. Financial information is insufficient for a credibility judgment, and sustainability-related fire-drill and environmental-assessment status is unknown.

After-Sales capabilityTechnology engineers are responsible for technical support during production and after-sales service, but the supplier has no written procedures or records for effective service assessment, corrective and preventive actions, or customer complaint handling. It also has no overseas warehouse, showroom, agent, or branch, limiting evidence of structured or localized after-sales support.

R&D capabilityThe supplier reports new products within the past year, ODM capability, customization-related R&D services, and use of PS and CAD. It also reports OEM service for well-known brands. Countervailing evidence includes only one year of total R&D engineer experience, no available SDK, and no R&D design-input, output, review, verification, or validation documents for audit.

Production capacityThe supplier reports a self-built plant exceeding 15,000 square meters, more than 10 production lines, complete testing facilities, and peak-season order fulfillment within 15 working days. These explicit operating-scale and delivery statements support a production-capability advantage, although the number of quality-control staff is listed as unavailable.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, flexible customization, and minor customization. It also provides ODM services, demonstrating broad stated customization coverage.

Client casesThe supplier states that it provides OEM services for well-known brands and identifies Europe as a primary export market. These statements indicate some brand and export experience, but no customer names, project details, order references, or verifiable case documentation are provided.

Product Q&A

Q:What specifications are needed for a 220V to 12V step down transformer?

Please provide Input Voltage with fluctuation range, Output Voltage and Current, Rated Power (VA/W), Frequency (50Hz/60Hz), Construction type (Toroidal/EI/R), Installation method, and Insulation Grade.

Q:What is the difference between VA and W, and how should I choose?

VA approximates W for resistive loads. For inductive loads like motors, W is less than VA. Select based on apparent power (VA) and leave a 20%-30% safety margin.

Q:Should I choose a Toroidal or traditional EI transformer?

Toroidal transformers offer higher efficiency and less interference but are larger and costlier. EI transformers are smaller, lighter, cheaper, and easier to maintain for general industrial use.

Q:Is there a shielding layer in transformers and what is it used for?

Yes, a copper foil shielding layer can be added between primary and secondary coils to suppress high-frequency interference and enhance EMI resistance, essential for audio and measuring instruments.

Q:How do you ensure the quality and service life of the transformer?

We use high-grade silicon steel and pure copper wire, apply vacuum impregnation (VPI) for moisture resistance, and conduct 100% factory tests including Hi-Pot and load tests.