ZXY3108 Toroidal Audio Transformer - Permalloy Shielded 150/600:10K Dual Ratio 1:3.5 / 1:7 Audio Matching Transformer, Wire Leads or PCB Mount
ZXY3108 is a compact toroidal audio transformer with high-permeability permalloy magnetic shielding in a Ø31 mm × 22.5 mm nickel-plated steel case. Dual ratio 1:3.5 / 1:7, 100% copper winding and colour-coded leads, available with wire leads or PCB pin mount.
- Toroidal core: high magnetic efficiency, low leakage inductance
- Permalloy magnetic shielding reduces EMI interference and noise
- 100% copper winding for low resistance and high-fidelity sound
- Dual ratio 1:3.5 / 1:7, 150/600:10K marking
- Compact Ø31 mm × 22.5 mm case, epoxy sealed terminal, CCC / CE / RoHS / UL
1. Product Overview
The ZXY3108 is a compact toroidal audio transformer with high-permeability permalloy magnetic shielding. Housed in a Ø31 mm × 22.5 mm nickel-plated steel case, it provides impedance matching and signal coupling in audio equipment, using 100% copper windings and colour-coded leads that keep assembly quick and error-free. A wire-lead version and a PCB pin-mount version are both available.
Toroidal core, 100% copper winding, permalloy shielding and wide audio bandwidth
2. Key Features
- Toroidal core structure for high magnetic efficiency and low leakage inductance
- High-permeability permalloy magnetic shielding reduces EMI interference and noise
- 100% copper winding for better conductivity, lower resistance and high-fidelity sound
- Wide audio bandwidth for clear, natural and faithful reproduction
- Dual ratio options: 1:3.5 and 1:7 turns ratios
- Colour-coded leads for fast, error-free connection
- Two termination versions: wire leads or PCB pin mount
- Compact Ø31 mm × 22.5 mm nickel-plated steel case
- Epoxy sealed terminal
Dual ratio options 1:3.5 / 1:7 turns ratios with colour-coded leads
Termination options: wire leads version or PCB pin mount version
3. Advantages
The toroidal core is what separates this transformer from a conventional laminated design. Because the winding is closed around a continuous ring, the magnetic flux stays inside the core: leakage inductance is low, the stray field that escapes towards neighbouring circuits is small, and magnetic efficiency is high. The result is faithful signal transfer with little interaction with the components around it.
Permalloy magnetic shielding adds a second layer of protection. The high-permeability shield surrounds the winding and absorbs external magnetic interference, so hum and noise picked up from power supplies, motors or adjacent transformers are strongly attenuated. This matters most in densely packed audio products, where space between sensitive signal stages is limited.
100% copper wire keeps winding resistance low and conductivity high, which supports clean high-fidelity sound. Precision production also keeps electrical characteristics consistent from unit to unit, so a design performs the same way in the prototype and in every production batch. The metal case and epoxy sealed terminal protect the winding through handling and assembly.
Precision batch consistency with high-permeability permalloy magnetic shielding
4. Applications
The ZXY3108 is rated for audio use and is intended for impedance matching, signal coupling and level interfacing inside 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 Specification
| Item | Value |
|---|---|
| Usage | Audio |
| Phase | Single |
| Coil Structure | Toroidal |
| Coil Configuration | Autotransformer |
| Bobbin Material | Nylon |
| Product Category | Bobbin coil |
| Bobbin Form | Circular or square |
| Wire Material | Copper |
| Wire Diameter | 0.025~2.0 |
| Lead Way | Pin or electronic wire |
| Winding | 2.5~50000 |
| Packaging | Carton |
| Bobbin Colour | Customer designated |
Note: values in this table are transcribed as supplied in the specification table, including the wire diameter and winding ranges.
5.2 Lead Assignment
| 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 Colour
| Pin | Wire colour |
|---|---|
| 1 | Black |
| 2 | Black |
| 3 | White |
| 4 | Green |
| 5 | Yellow |
| 6 | Blue |
| 7 | Red |
| 8 | Yellow |
Note: dedicated shield and metal-case grounding leads are identified in the wiring diagram in addition to the primary and secondary windings; confirm lead numbers against the drawing supplied with your order.
Pinout and wiring diagram: PRI 1-4, SEC 5-8, shield and metal case leads
5.4 Dimensions and Construction
| Parameter | Specification |
|---|---|
| Case diameter (top view) | Ø31.0 mm |
| Case height (front view) | 22.5 mm |
| Overall size | Ø31 mm × 22.5 mm |
| Tolerance | ± 0.2 mm unless otherwise specified |
| Metal case material | Nickel-plated steel |
| Leads | 24 AWG, tinned copper |
| Terminal | Epoxy sealed terminal |
| Termination options | Wire leads or PCB pin mount |
Note: all dimensions are in millimetres (mm).
Product dimensions: Ø31 mm × 22.5 mm compact permalloy shielded structure
4-view technical specification with pin and wire colour table
6. Quality & Testing Assurance
- Precision batch consistency backed by high-permeability permalloy magnetic shielding.
- 100% copper winding for stable electrical performance and high-fidelity sound.
- Nickel-plated steel case with an epoxy sealed terminal for 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 enquiries, please contact our sales team with your required quantity and destination port.