ZXY3108 Toroidal Audio Transformer - Permalloy Shielded 150/600:10K Dual Ratio 1:3.5 / 1:7 Audio Matching Transformer, Lead or PCB Mount

1. Product Overview

The ZXY3108 is a compact toroidal audio transformer with high-permeability permalloy magnetic shielding. The housing is a Ø31 mm × 22.5 mm nickel-plated steel shell, providing impedance matching and signal coupling in audio equipment, using 100% copper windings and color-coded leads to ensure quick and error-free assembly. Available in lead versions and PCB pin mount versions.

Toroidal core, 100% copper winding, permalloy shielding, and wide audio bandwidth

2. Key Features

• Toroidal core structure, high magnetic efficiency, low leakage inductance
• High-permeability permalloy magnetic shield reduces EMI interference and noise
• 100% copper winding for better conductivity and lower resistance, high-fidelity sound
• Wide audio bandwidth for clear, natural, and faithful reproduction
• Dual turns ratio options: 1:3.5 and 1:7 turns ratio
• Color-coded leads for quick and error-free connection
• Two termination versions: lead or PCB pin mount
• Compact Ø31 mm × 22.5 mm nickel-plated steel housing
• Epoxy-sealed terminals

Dual turns ratio options 1:3.5 / 1:7 with color-coded leads

Termination options: lead version or PCB pin mount version

3. Advantages

The toroidal core is the key differentiator of this transformer from traditional laminated designs. Since the winding is closed around a continuous ring, magnetic flux remains within the core: low leakage inductance, minimal stray magnetic field leaking to adjacent circuits, and high magnetic efficiency. The result is faithful signal transmission with minimal interaction with surrounding components.

The permalloy magnetic shield provides a second layer of protection. The high-permeability shield surrounds the winding, absorbing external magnetic interference, so hum and noise picked up from power supplies, motors, or adjacent transformers are strongly attenuated. This is particularly important in component-dense audio products where space between sensitive signal levels is limited.

100% copper wire maintains low winding resistance and high conductivity, supporting clear, high-fidelity sound. Precision production also ensures consistent electrical characteristics across each unit, so the design performs identically in prototypes and every production batch. The metal housing and epoxy-sealed terminals protect the winding during operation and assembly.

Precision batch consistency with high-permeability permalloy magnetic shielding

4. Applications

The ZXY3108 is rated for audio and designed for impedance matching, signal coupling, and level interfacing within audio equipment.

• Audio impedance matching and signal coupling between circuit stages
• Line-level and high-impedance input stages
• Mixing consoles, amplifiers, and studio equipment
• Broadcast and installed sound systems
• PCB-mounted audio circuits using the pin mount version
• OEM audio products

PCB pin mount version assembled on an audio circuit board

5. Specifications

5.1 General Specifications

Item	Value
Application	Audio
Number of Phases	Single-phase
Coil Structure	Toroidal
Coil Configuration	Autotransformer
Bobbin Material	Nylon
Product Category	Coil former
Bobbin Shape	Round or square
Wire Material	Copper
Wire Diameter	0.025~2.0
Lead-out Method	Pin or electronic wire
Winding	2.5~50000
Packaging	Carton
Bobbin Color	Customer specified

Note: Values in this table are transcribed as provided in the specification sheet, including wire diameter and winding range.

5.2 Terminal Allocation

Function	Designation
Primary winding	PRI
Secondary winding	SEC
Shield/ground lead	Provided – see wiring diagram
Metal case/chassis ground lead	Provided – see wiring diagram

5.3 Pin and Wire Colors

Pin	Wire Color
1	Black
2	Black
3	White
4	Green
5	Yellow
6	Blue
7	Red
8	Yellow

Note: In addition to the primary and secondary windings, dedicated shield and metal case ground leads are indicated in the wiring diagram; please confirm lead numbering based on the drawing provided with the order.

Pinout and wiring diagram: PRI 1-4, SEC 5-8, shield and metal case leads

5.4 Dimensions and Construction

Parameter	Specification
Housing Diameter (Top View)	Ø31.0 mm
Housing Height (Front View)	22.5 mm
Overall Dimensions	Ø31 mm × 22.5 mm
Tolerance	±0.2 mm unless otherwise specified
Metal Housing Material	Nickel-plated steel
Leads	24 AWG, tinned copper
Terminals	Epoxy-sealed terminals
Termination Options	Lead or PCB pin mount

Note: All dimensions are in millimeters (mm).

Product dimensions: Ø31 mm × 22.5 mm compact permalloy shielded structure

4-view technical specification with pin and wire color table

6. Quality and Test Assurance

• High-permeability permalloy magnetic shielding ensures precision batch consistency.
• 100% copper winding ensures stable electrical performance and high-fidelity sound quality.
• Nickel-plated steel housing and epoxy-sealed terminals provide mechanical and environmental protection.
• Certified quality: CCC, CE, RoHS, and UL.

Audio performance verification on the test bench

International certifications and compliance: CCC, CE, RoHS, UL

Model: ZXY3108 | Brand: ZXY | Marking: 150/600:10K. For datasheets, samples, or OEM/ODM inquiries, please contact our sales team with the required quantity and destination port.