ZXY1806 Low-Frequency Audio Transformer - Toroidal Autotransformer, 2+3 Pin DIP, Epoxy Encapsulated, 600:600 / 600:10K / 10K:10K Impedance Ratios, CCC CE RoHS UL

1. Product Name

ZXY1806 low-frequency audio transformer. Toroidal copper coil, autotransformer structure, 2+3 pin DIP layout, epoxy-encapsulated black housing, laser-marked panel, impedance ratios include 600:600, 600:10K, and 10K:10K.

Overview. The body is an encapsulated black housing that encloses the windings, with DIP pins on the bottom for through-hole soldering. The geometry is confirmed through four views: the top surface bears the silkscreen marking, the front view shows the two-pin row, the side view shows the body thickness, and the bottom view shows the 2+3 pin arrangement and encapsulation structure.

Input is applied to pins 1-2, and output is taken from pins 3-5. The two pin groups are located on opposite edges of the bottom surface rather than in a single row, so the primary and secondary sides of the circuit are physically isolated at the board-level interface.

2. Product Features

Toroidal coil structure. Wound with copper wire

Autotransformer winding count. Single-phase design

Multiple impedance ratios. 600:600, 600:10K, and 10K:10K

2+3 pin configuration. Pins 1-2 for input, pins 3-5 for output

DIP through-hole mounting. Tinned copper pins

Premium epoxy encapsulation. For sealing and environmental protection

Clear laser-marked silkscreen. Ensures durable model and impedance ratio identification

Low-frequency transformer. Suitable for electronic equipment

Customizable electrical specifications. To match target circuit requirements

Compact encapsulated body. Ready for direct PCB assembly

Carton packaging. Suitable for bulk shipping

Input and output are separated by two pin rows on the body — two pins on the input side and three pins on the output side — ensuring clear distinction between primary and secondary connections during assembly. The body is an encapsulated black housing with DIP pins on the bottom for through-hole soldering.

3. Product Advantages

Multiple impedance ratios in one package series. 600:600, 600:10K, and 10K:10K share the same body and pin layout, so a single part number covers multiple interface requirements, keeping the bill of materials streamlined.

Epoxy encapsulation as a protective barrier. Windings are sealed against moisture, dust, and mechanical damage, rather than relying on an open bobbin.

Durable marking. The laser-marked panel keeps the model and impedance ratio clearly legible after encapsulation, so devices in the field can still be accurately identified.

Terminals with good solderability. Tinned copper pins wet reliably during through-hole assembly without requiring additional pre-tinning steps.

Specifications matched to circuit requirements. Electrical specifications are customized to order, and devices are manufactured to the defined interface rather than adapted after the fact.

Compact board footprint. The encapsulated body size suits space-constrained PCB layouts.

Consistency across versions. All impedance versions share a unified encapsulated body and pin layout, ensuring consistency in assembly and incoming inspection.

Encapsulation is the manufacturing step least visible to buyers yet most relied upon. Open windings accumulate dust and moisture over years of use; encapsulated windings do not. The same applies to the panel: once the device is soldered in place, the printed impedance ratio is the only identifier for the component, which is why laser marking is used instead of paper labels.

4. Application Areas

Audio equipment and electronic devices. The primary application scenario for this model.

PCB-level signal transformers. The encapsulated through-hole body integrates directly into board-level assemblies.

Low-frequency audio signal paths. Suitable for circuits operating in the low-frequency audio band.

Custom circuit designs. Electrical specifications are supplied customized to specific project requirements.

On the circuit board, the device sits at the junction of two signal sections, with the 2+3 pin layout connecting each side's signals to its respective pins. Since the specifications are custom-designed, the same body can accommodate different interfaces within the same project — which is the practical reason for offering three impedance ratios on one package.

5. Application Specifications

The table below lists the declared model attributes of the ZXY1806, followed by the pin configuration and structural details shown in the product drawings.

5.1 Model Attributes

5.2 Pin Configuration and Structure

6. Quality and Testing Assurance

The ZXY1806 is manufactured in accordance with certified safety and environmental standards and carries the following declared certification marks.