ZXY-ED8 Permalloy Audio Isolation Transformer — 600:600 & 10K:600, 0.1-5 W, 2.0 kV AC, Shielded SMD

1. Product Name

ZXY-ED8, a miniature shielded Permalloy audio isolation transformer in surface-mount packaging, is suitable for low-power audio and communication circuits from 0.1 W to 5 W. It is available in two standard impedance ratios: 600:600 and 10K:600, with custom impedance ratios available on order. The core is Permalloy, the housing is a miniature metal shield, and the bobbin is a V-0 flame-retardant molded part rated for 130 °C insulation.

One series, two uses. The 600:600 version is a line-level matching variant for 600 Ω circuits requiring isolation on both sides. The 10K:600 version is a step-down ratio variant for high-impedance sources driving 600 Ω lines. Both share identical dimensions and pad layouts, so a single PCB design can accommodate either impedance ratio.

2. Structure and Materials

Shield. The miniature metal shield around the winding performs two distinct functions: it closes the magnetic circuit to resist external magnetic field interference, and it protects the copper wire from dust and moisture. On densely populated PCBs, the second function is equally critical because an unshielded audio transformer behaves as both a component and an antenna.

Core. The use of Permalloy rather than ferrite is the key to maintaining compact size and low loss at audio frequencies: this series is rated at no less than 92% efficiency. The photo shows a laminated Permalloy core with windings placed in the window and wrapped by a molded bobbin.

Insulation System. The bobbin is made of V-0 flame-retardant molded material with a 130 °C temperature rating, enabling reflow soldering rather than manual soldering. The windings withstand 2.0 kV AC for 1 minute, ensuring full electrical isolation, with insulation resistance no less than 100 MΩ at 500 VDC.

Termination. The product has SMD solder pads at both ends, with a compact pad layout suitable for placement next to connectors on portable audio PCBs. The description notes compatibility with automated SMT placement; however, pad geometry is not specified—refer to the drawing.

3. Features

High-quality Permalloy core. Low loss, efficiency no less than 92%, achieving high-fidelity audio signal transmission.

Miniature metal shield. Integrates dust protection, moisture protection, and EMI/RFI suppression, eliminating the need for an additional shielding box on the PCB.

Low power range, 0.1 W to 5 W. Customizable, designed specifically for mini portable audio and communication devices, not for line amplifiers.

Standard impedance ratios of 600:600 and 10K:600. Customizable for various audio circuits; the two standard versions cover line matching and step-down matching applications.

V-0 flame-retardant bobbin. 130 °C high-temperature insulation rating, enabling reflow soldering compatibility.

2.0 kV AC withstand voltage for 1 minute. Ensures full electrical isolation between windings.

Insulation resistance no less than 100 MΩ at 500 VDC. Extremely low leakage current, ensuring clear and stable audio quality rather than relying on chance to avoid hum.

Low temperature rise at full load. Long service life at rated power without signal distortion.

Compact SMD surface-mount pads. Fully compatible with automated SMT PCB assembly.

4. Advantages

Integrated magnetic and shielding functions. High permeability, low loss, and EMI/RFI suppression capabilities in a package compact enough for portable devices.

Verifiable electrical isolation. 2.0 kV AC withstand voltage and 100 MΩ or higher insulation resistance are clear acceptance criteria, not descriptive language.

Standard impedance ratios shorten design cycles. 600:600 and 10K:600 are standard versions; other impedances are custom specifications wound on order.

Designed for reflow soldering. V-0 grade and 130 °C rated materials support SMT production, so this product does not force manual soldering processes onto the line.

Stable performance under load. Low temperature rise maintains low distortion and long service life at rated power.

Customization based on drawings or samples. OEM Permalloy transformer processing is available based on samples or drawings, with specifications confirmed before mass production.

5. Applications

Mini portable audio and communication devices. This device is rated for 0.1 W to 5 W: suitable for handheld audio gear, intercom systems, and compact communication devices.

Audio line isolation and impedance matching. Suitable for 600 Ω and 10 kΩ systems, corresponding to the two standard turns ratios.

PCBs sensitive to EMI/RFI. Ideal for applications where shielded audio isolation transformers are required, not optional.

SMT production lines. Surface-mount magnetic components can go through the same reflow process as the rest of the board.

6. Specifications

The following table lists the specifications claimed for the ED8 series. If a value is not provided in the source, the cell explicitly notes it rather than borrowing values from other series.

6.1 Overview

6.2 Electrical Parameters

6.3 Material and Construction

6.4 Mechanical and Mounting

6.5 Quality and Testing

7. Ordering Information

The product is ordered under the model ZXY-ED8, specifying the impedance ratio, either 600:600 or 10K:600. The core, shield, bobbin, and SMD termination are common to the series; turns and copper wire are determined by the impedance ratio, so an order without a specified impedance ratio cannot be checked against a single acceptance table. Custom Permalloy transformers and OEM products are manufactured per customer drawings or samples.

Certification: The scanned documents accompanying this description cover the company’s quality management system and other ZXY models; none specifically mention ZXY-ED8, so no compliance claim is made here, and the logo from the provided renderings is not used. If a certificate is required for a list, cite the certificate number itself.

Brand/Manufacturer: ZXY, Shenzhen ZhiXiangYuan Electronics Co., Ltd. http://www.zxycoil.com