PRODUCT SYSTEM

EI & Miniature Transformers

Compact EI square and miniature transformers from a 20 W current minimum.

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Laminated EI transformer with terminal blocks and mounting base — PRODUCT SYSTEM / EI MINIATURE TRANSFORMERS **Representative product photography from the qualified production process.**

01PRODUCT LOGIC

Built around the conditions that determine performance.

EI square and miniature transformers serve equipment where power, height and mounting space are all constrained. Published EI examples use 50/60 Hz operation, UL lead options and defined winding dimensions; miniature builds are adapted to the available envelope.

COMPACT POWER

Small equipment does not have to mean an unverified transformer.

The current family starts at 20 W. Published EI and miniature examples show defined electrical tolerances, dimensions and lead arrangements for compact equipment and space-constrained installations.

20 W Current minimum

Compact custom builds from the current commercial range

50/60 Hz Published EI frequency

The 20 W example also states 45–60 Hz operation

75 × 50 × 43 mm 20 W EI example

Dimensions vary by power, winding and mounting

Current minimum20 W

Published EI range20, 30 and 50 W examples; earlier catalogue pages show lower legacy ratings

20 W example220 V ±10% input; 24 V ±2% output

Frequency50/60 Hz; the 20 W example states 45–60 Hz operation

InsulationPrimary-to-secondary insulation resistance stated as at least 500 MΩ

ConstructionEI bobbin construction; miniature builds sized around the available envelope

BUILD REFERENCES

Construction details,
not catalogue decoration.

Representative hardware and assembly photography from the qualified production route. The approved drawing remains the production reference.

Open laminated EI transformer showing the bobbin, winding and core stack — 02Laminated core and bobbin construction

20 W starting point

Current product scope starts at 20 W, with compact 25–50 W examples documented.

EI and miniature formats

Square EI and space-constrained constructions cover different enclosure layouts.

Defined electrical values

Published examples show input tolerance, output tolerance, frequency and insulation resistance.

Lead and mounting flexibility

Lead length, termination and mechanical arrangement are fixed on the drawing.

PRODUCT FAMILIES