What is the price and MOQ?

Price depends on power and complexity. MOQ is ~100pcs for standard specs and 500-1000pcs for custom molds.

How long does delivery take?

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

Can you provide samples and how are they charged?

Samples are available for serious customers with a 3-5 day lead time. Fees are usually refundable after bulk order.

What causes transformer failure and is there a warranty?

Failures are caused by overload, short circuits, or harsh environments. We provide a 1-year warranty for quality issues.

230V 15-0-15 15V 3A 12V Center Tapped Step Down Ei Transformer

Name: 230V 15-0-15 15V 3A 12V Center Tapped Step Down Ei Transformer
Brand: Hangzhou Udwells Technology Co., Ltd.
SKU: 2230313275

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: Full customization available including EI/Toroidal types, installation methods, and operating temperatures.

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

100% Factory Testing: All units undergo dielectric strength, inter-winding, load, and no-load current tests before shipment.

1-Year Warranty: Free repair or replacement provided for quality issues within the 1-year warranty period.

EMI Shielding Option: Optional copper foil shielding layer available to suppress high-frequency interference.

VPI Process: Vacuum impregnation ensures moisture resistance, shock absorption, and superior insulation strength.

Flexible MOQ: MOQ ranges from 100pcs for standard specs to 500-1000pcs for fully custom requirements.

Sample Support: Samples available with 3-5 day lead time; fees refundable upon bulk order placement.

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: ≤3.73h

AI-Powered supplier vetting

SummaryHANGZHOU UDWELLS TECHNOLOGY CO. Ltd. is a combined company with a strong technological base and significant production capacity. It offers OEM services for popular brands and operates more than 10 production lines. However, there are gaps in R&D documentation and service capability procedures. The company does not hold SDKs for development, nor does it have overseas facilities or participate in trade shows. Its primary export market is Europe, and it has proximity to major ports in China.

Supplier typeThe supplier is identified as a 'Combined' type company, indicating a diverse business scope.

After-Sales capabilityThe supplier provides technical support for production and after-sales service but lacks documented procedures for service capability and customer complaint handling.

R&D capabilityThe company lacks R&D audit documentation and SDK availability, indicating limitations in software development and innovation processes.

Production capacityThe supplier operates 27 production lines, indicating robust manufacturing capacity. Its annual production output ranges from US$1 Million to US$2.5 Million.

Customization capabilityThe supplier provides OEM services for well-known brands, demonstrating its ability to customize production.

Product Q&A

Q:What specifications are needed for production?

Please provide Input Voltage, Output Voltage & Current, Rated Power (VA/W), Frequency, Construction type, Installation Method, and Insulation Grade.

Q:What is the difference between VA and W?

VA approximates W for resistive loads. For inductive loads, W < VA. Select based on apparent power (VA) with a 20%-30% safety margin.

Q:Which transformer should I choose: Toroidal or EI?

Choose Toroidal for high efficiency and low interference (audio/precision). Choose EI for lower cost, smaller volume, and easier maintenance (general industrial).

Q:Is there a shielding layer in transformers?

Yes, a copper foil shielding layer can be added between coils to suppress high interference and enhance EMI resistance.

Q:How do you ensure quality and service life?

We use high-grade materials, VPI process, and conduct 100% factory tests including Hi-Pot, inter-winding, and load tests.