How long does delivery take?

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.

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 3-5 days.

What are common reasons for transformer failure?

Common causes include overload (exceeding rated power), short circuits at the output, and harsh environments (high temperature/humidity) causing insulation aging.

Do you provide a warranty?

We provide a 1-year warranty. If the product fails due to quality issues, we will repair or replace it for free.

Mini 2va Ei38 13.6va 3.2va Encapsulated PCB Mounted Potting Electric Transformer

Name: Mini 2va Ei38 13.6va 3.2va Encapsulated PCB Mounted Potting Electric Transformer
Brand: Hangzhou Udwells Technology Co., Ltd.
SKU: 2229849795

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

Customizable Design: Offers full customization including EI/Toroidal types, vertical/horizontal installation, and specific operating temperatures.

High-Quality Materials: Constructed with new high-grade silicon steel sheets (H18/H14) and 100% pure copper wire for durability.

EMI Shielding Option: Optional copper foil shielding layer between coils to suppress interference, ideal for audio and precision instruments.

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

Flexible OEM/ODM: Supports OEM/ODM services with customization from samples, designs, or full custom specifications.

ISO9001 Certified: Manufacturing process adheres to ISO9001 quality management standards for consistent product reliability.

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: ≤5.74h

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 production?

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

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

Toroidal transformers offer higher efficiency, less leakage magnetism, and are smaller/lighter but cost more. EI transformers are more cost-effective, easier to maintain, and suitable for general industrial use.

Q:What is the purpose of a shielding layer in transformers?

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

Q:How do you ensure quality and service life?

We use high-grade silicon steel and pure copper, apply VPI process for insulation, and conduct 100% factory tests including Hi-Pot, inter-winding, load, and no-load tests.

Q:What is the price and MOQ?

Price and MOQ depend on specifications. Standard specs may have an MOQ of 100pcs, while full custom specs require 500-1000pcs due to mold opening. Larger quantities lower the unit price.