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PCB Mount EI Transformers with Custom Voltage Outputs
Available with single, dual or multiple secondary windings to meet the power requirements of industrial and electronic control boards.
| Parameter | Typical Range / Available Options |
|---|---|
| Product Type | Open-frame, vacuum-impregnated or fully encapsulated PCB transformer |
| Rated Power | 0.5 VA to 100 VA typical; higher ratings subject to engineering review |
| Primary Voltage | 100V, 110V, 115V, 120V, 200V, 220V, 230V or 240V AC; single or dual primary |
| Secondary Voltage | 3V to 48V AC per winding typical; other voltages available |
| Output Configuration | Single, center-tapped, dual or multiple secondary windings |
| Frequency | 50Hz, 60Hz or 50/60Hz |
| Core Material | EI laminated electrical steel core selected according to power and temperature-rise requirements |
| Winding Material | Copper winding wire |
| Insulation Class | Class B 130°C or Class F 155°C |
| Dielectric Strength | Project-specific; 3.0–4.0kVAC primary-to-secondary options commonly available |
- Overview
- Recommended Products
- Visual Inspection: Routine or sampling
- Dimensional Inspection: Sampling, with critical dimensions controlled as specified
- Winding Resistance: Routine test
- Turns Ratio / Output Voltage: 100% routine test
- No-Load Current: 100% or agreed inspection plan
- No-Load Loss: Sampling or qualification
- Load Voltage and Regulation: Sample and periodic verification
- Insulation Resistance: Routine or sampling
- Dielectric Strength / Hi-Pot: 100% at the approved test level
- Temperature Rise: Type or qualification test
- Audible Noise: When required by the approved specification
- Solderability: Qualification or sampling
- Resistance to Soldering Heat: Verified according to the project requirement
Custom PCB Transformers Engineered for Your Circuit Board
Compact through-hole PCB Transformer with customized input voltage, output windings, rated power, pin layout and insulation construction. ECKO designs each transformer around your load requirements, PCB footprint, temperature-rise target and applicable safety requirements.
From initial electrical calculations to approved drawings, controlled production and routine electrical testing, we help OEM customers integrate reliable mains-frequency power conversion directly into their PCB assemblies.
Typical PCB Transformer Specifications
Specification notice: The values above represent typical engineering capabilities rather than one fixed catalog model. Final electrical ratings, dimensions, tolerances and test limits are defined by the customer-approved specification and dimensional drawing.
PCB Transformer Product Advantages
PCB Transformer Customization Options
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Electrical Input |
Electrical Output |
Rated Power |
PCB Footprint |
|
Product Dimensions |
Insulation System |
Dielectric Strength |
Thermal Protection |
|
Environmental Protection |
Noise Control |
Documentation |
Packaging |
Why Choose ECKO for Custom PCB Transformers?
PCB Transformer Tests and Reference Standards
From winding continuity and output voltage to insulation withstand, temperature rise and solderability, ECKO verifies each PCB transformer according to the approved drawing, test specification and inspection plan.
Routine Production Tests
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Visual and Dimensional Inspection Workmanship, labels, polarity marks, pin condition, outline dimensions, seated height, pin pitch and pin position are checked against the approved drawing. |
Winding and Output Verification Winding resistance testing checks conductor continuity and manufacturing consistency. Turns-ratio and output-voltage testing confirm the required secondary voltage and winding polarity at the specified primary input. |
No-Load and Rated-Load Performance No-load current and no-load loss are evaluated to confirm core assembly, winding consistency and standby performance. Rated-load voltage and regulation are verified under defined input and load conditions. |
|
Insulation Safety Testing Insulation resistance testing checks electrical separation between windings and accessible conductive parts. Dielectric strength testing verifies the specified insulation withstand level at the approved voltage and duration. |
Temperature Rise and Audible Noise Temperature-rise testing verifies thermal performance under defined mounting, ambient and load conditions. Audible-noise evaluation is performed when transformer hum or mechanical vibration is controlled by the project specification. |
PCB Pin Solderability PCB pin wetting and resistance to soldering heat are evaluated to support stable PCB assembly and repeatable solder-joint quality. |
Custom PCB Transformer Development Process
PCB Transformer FAQ
1. What is the difference between an open-frame and an encapsulated PCB transformer?
An open-frame transformer is generally smaller, lighter and more economical. A fully encapsulated transformer provides better protection against moisture, dust and mechanical vibration, but normally has different thermal behavior, dimensions and tooling requirements.
2. Can you match our existing PCB footprint?
We can review your PCB layout, hole positions, keep-out area and maximum component height. Final pin tolerances and PCB hole diameters should be confirmed through an approved dimensional drawing.
3. Can the transformer dimensions be customized?
Yes, within the limits of electrical power, insulation distance, core size and temperature rise. Reducing one dimension may require increasing another dimension or accepting different thermal and regulation performance.
4. What is the typical temperature rise of a PCB transformer?
Temperature rise is not one fixed value for every model. It depends on the VA rating, ambient temperature, enclosure ventilation, core flux density, winding current density and insulation class. ECKO can design to an agreed maximum temperature-rise target and verify it on the sample.
5. Can you reduce no-load current, standby loss or audible hum?
These characteristics can be improved through core selection, increased turns, lower flux density, controlled core assembly, winding arrangement and impregnation. The required limits should be stated before the transformer size and price are finalized.
6. Can you add an electrostatic shield?
A shield can be placed between the primary and secondary windings to reduce capacitive coupling and common-mode noise. The shield lead and grounding method must be shown in the customer’s circuit and pin diagram.
7. Can you install a thermal fuse inside the transformer?
One-shot thermal fuses and resettable thermal protectors can be evaluated according to the operating temperature, insulation system and abnormal-condition strategy. The protection temperature and electrical rating must be specified.
8. Do you perform 100% Hi-Pot testing?
Hi-Pot testing can be included as a 100% routine production test. The test voltage, duration, leakage-current limit and test points are defined by the approved specification and applicable standard.
9. Can you provide UL- or CE-related documentation?
Compliance and certification are model-specific. ECKO can evaluate the construction against relevant IEC, EN or UL requirements and provide available material declarations, test records or certification documents for the approved model. Certification scope should be confirmed before ordering.
10. What is the typical sample lead time?
Custom engineering samples are commonly completed within approximately 7–15 working days after the specification and drawing are approved. The exact schedule depends on bobbin availability, tooling, encapsulation requirements and qualification testing.
11. Can you replace an obsolete or discontinued PCB transformer?
Please provide an original sample, electrical ratings, pin diagram, PCB footprint and application information. A physical sample alone may not contain enough information to determine the required insulation system, temperature rise or safety classification.
