Can samples be provided, and how are they charged?

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

What are common reasons for transformer failure, and is there a warranty?

Common causes: Overload, short circuit, or harsh environments (high temp/humidity) causing insulation aging. We provide a 1-year warranty. Quality issues are repaired or replaced for free.

Direct Supplier High Quality 5V 12V 24V 220V Step up Step Down Ei 6622 Power Transformer for Access Control System

Name: Direct Supplier High Quality 5V 12V 24V 220V Step up Step Down Ei 6622 Power Transformer for Access Control System
Brand: Hangzhou Udwells Technology Co., Ltd.
SKU: 2230724695

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 Voltage Range: Supports 5V, 12V, 24V, and 220V input/output for versatile applications.

Extensive Power Capacity: Available in models ranging from 0.3VA up to 2000VA for various loads.

EI Core Design: Core-type EI structure ensures stability and cost-effectiveness for industrial use.

Dry-Type Cooling: Air-cooled design eliminates fire risk and reduces maintenance needs.

ISO9001 Certified: Manufactured under ISO9001 quality management standards for reliability.

Customizable Options: Offers custom types (EI/Toroidal), installation methods, and temperature ratings.

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

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: ≤4.46h

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:Should I choose a Toroidal or EI transformer?

Toroidal: High efficiency, low leakage, compact, but higher cost. EI: Lower cost, larger/heavier, easier to maintain. Choose Toroidal for high-end audio/precision instruments; choose EI for general industrial/cost-sensitive applications.

Q:Do transformers have a shielding layer, and what is it for?

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

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

We use new high-grade silicon steel sheets, 100% pure copper wire, and Class B+ insulation. We apply Vacuum Impregnation (VPI) for moisture/shock resistance. Every unit undergoes 100% testing including Hi-Pot (AC 3000V), inter-winding, load, and no-load tests.

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

Price and MOQ depend on specifications and quantity. Standard specs may have an MOQ of 100pcs. Fully custom specs (requiring molds) may have an MOQ of 500-1000pcs. Higher power/complexity increases unit price. Larger quantities lower the price.

Q:How long does delivery take?

Standard/small orders: 10-15 working days. New customizations: Add 5-7 days for sample making/confirmation. Large orders: 15-30 days. Raw material price fluctuations may also affect delivery time.