Can samples be provided and how are they charged?

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

What is the warranty period and coverage?

We provide a 1-year warranty. If the transformer breaks due to quality issues, we will repair or replace it for free. Common damage causes include overload, short circuits, or harsh environments.

Low Frequency Encapsulated 50/60Hz Potting Coil Welding Transformer

Name: Low Frequency Encapsulated 50/60Hz Potting Coil Welding Transformer
Brand: Hangzhou Udwells Technology Co., Ltd.
SKU: 2236974625

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

High Efficiency Toroidal Design: Toroidal core offers high efficiency with no air gap and minimal leakage magnetism compared to EI types.

EMI Shielding Option: Optional copper foil shielding layer between coils effectively suppresses electromagnetic interference.

Premium Material Construction: Uses new high-grade silicon steel sheets (H18/H14) and 100% pure copper wire for durability.

100% Factory Testing: Every unit undergoes Hi-Pot, inter-winding, load, and no-load current tests before shipment.

Flexible Customization: Supports full customization including voltage, power, core type (EI/Toroidal), and installation methods.

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: ≤4.34h

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 custom transformer?

Please provide Input Voltage, Output Voltage/Current, Rated Power (VA/W), Frequency (50/60Hz), Core Construction (Toroidal/EI), Installation Method, and Insulation Grade.

Q:What is the difference between Toroidal and EI transformers?

Toroidal transformers offer higher efficiency, less leakage magnetism, and smaller volume but are more expensive. EI transformers are lower cost, easier to maintain, and suitable for general industrial use.

Q:What is the purpose of the shielding layer?

The shielding layer (copper foil) between primary and secondary coils is grounded to suppress high-frequency interference, enhancing EMI resistance, which is essential for audio and measuring instruments.

Q:What is the minimum order quantity (MOQ)?

MOQ depends on customization. Standard specs may have an MOQ of 100pcs. Fully custom specs requiring molds may have an MOQ of 500-1000pcs. Larger quantities reduce unit price.

Q:What is the delivery time for orders?

Standard/small orders take 10-15 working days. New customizations require an additional 5-7 days for samples. Large orders may take 15-30 days. Raw material price fluctuations may also affect timing.