EN
120V to 24V 20VA PCB Mount Transformer for Control Boards
Custom-engineered for reliable board-level voltage conversion with copper windings, controlled temperature rise and an application-specific pin layout.
| Parameter | Typical Range / Available Options |
|---|---|
| Product Type | Open-frame, vacuum-impregnated |
| 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 |
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Product Dimensions |
Insulation System |
Dielectric Strength |
Thermal Protection |
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Environmental Protection |
Noise Control |
Documentation |
Packaging |
Why Choose ECKO for Custom PCB Transformers?
PCB Transformer Tests and Reference Standards
Routine Production Tests
|
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. |
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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. Can you match our existing PCB footprint and pin layout?
ECKO can review your PCB hole positions, pin pitch, row spacing, component height and keep-out area. The final footprint must be confirmed through an approved dimensional drawing because pin tolerances and recommended PCB hole diameters can affect assembly.
2. Can the transformer height be reduced to fit a low-profile enclosure?
The height can often be adjusted by selecting a different core, bobbin or winding construction. However, reducing the height may increase the length, width, temperature rise or material cost. Our engineers will evaluate the available PCB area and recommend a practical dimensional arrangement.
3. How is the temperature rise of a PCB transformer determined?
Temperature rise depends on the rated load, input frequency, core flux density, copper current density, ambient temperature, mounting method and enclosure ventilation. It should be verified at rated load under conditions that represent the final equipment as closely as possible.
4. Does potting always reduce the transformer temperature?
Not necessarily. Encapsulation improves mechanical stability and resistance to moisture, dust and vibration, but it also changes how heat is transferred from the windings. The resin system, transformer dimensions and surrounding airflow must be considered during the thermal design.
5. What insulation classes are available for PCB transformers?
Class B 130°C and Class F 155°C insulation systems are commonly available. The selected insulation class does not by itself define the permitted temperature rise; ambient temperature, component ratings, safety standards and the final equipment’s thermal limits must also be considered.
6. Can you design reinforced insulation between the primary and secondary?
Yes, subject to the working voltage, required safety standard, pollution degree, material group, installation altitude and available dimensions. The bobbin construction, insulation barriers, creepage distance, clearance distance and dielectric-strength requirement must be reviewed together.
7. Do you perform 100% Hi-Pot testing on PCB transformers?
Hi-Pot testing can be included as a 100% routine production test. The test voltage, duration, leakage-current limit and test points are defined according to the approved product specification and applicable safety requirements.
8. Can a thermal fuse be built into the PCB transformer?
A one-shot thermal fuse or resettable thermal protector can be incorporated when required. Its operating temperature, current rating, installation position and coordination with the end-product protection system must be confirmed during the design stage.
9. How can audible hum and vibration be reduced?
Audible noise can be reduced through appropriate flux-density selection, accurate core assembly, controlled winding tension and vacuum impregnation or encapsulation. The final equipment enclosure and PCB mounting can also amplify vibration, so any specific noise limit should be stated before sample development.
10. Can ECKO replace an obsolete PCB transformer?
Please provide the original transformer sample, electrical ratings, PCB footprint, pin diagram, application information and any available drawings or test data. A replacement should be verified electrically, mechanically and thermally in the final equipment before mass production.
