ZXYAUDIO EE24 Audio Transformer - Low-Frequency Audio Signal Coupling & Isolation | Ni-Steel Lamination | Through-Hole DIP Pins

1. Product Overview

The EE24 is a low-frequency audio transformer designed for signal coupling and isolation in audio equipment. It is wound with 100% pure copper magnet wire on a high-permeability nickel-steel laminated core and wrapped with high-temperature polyester film tape, achieving low distortion, ultra-low signal loss, and extended low-frequency response while enhancing bass reproduction.

The device features a standard 3 + 4 through-hole DIP pin termination with high coplanarity and secure bobbin solder joints, ensuring reliable and repeatable mounting on PCBs and direct compatibility with SMT/DIP PCB assembly. Every unit undergoes 100% electrical testing. Electrical specifications, dimensions, and other parameters can be customized for specific applications.

Figure 1 — EE24 audio transformer for low-frequency audio signal coupling and isolation.

2. Key Features

Feature	Description
Signal Coupling & Isolation	Couples and isolates low-frequency audio signals in audio equipment.
Ni-Steel Laminated Core	High-permeability nickel-steel lamination maintains low distortion for clean, accurate audio performance.
Pure Copper + Polyester Film	100% pure copper magnet wire wrapped in high-temperature polyester film tape for low resistance and heat resistance.
3 + 4 DIP Pin Termination	Standard through-hole DIP pin layout with 3 + 4 pins, directly compatible with SMT/DIP PCB assembly.
100% Electrical Testing	Every unit is electrically tested to ensure consistent frequency response and high stability.
High Pin Coplanarity	Pins are precisely aligned for reliable, repeatable mounting on PCBs.
Secure Bobbin Solder Joints	Robust bobbin construction provides reliable solder terminations and long-term reliability.

3. Advantages

Advantage	Description
Low Distortion	High-permeability nickel-steel laminated core keeps audio signals low in distortion and maintains clean, accurate audio performance.
Ultra-Low Signal Loss	100% pure copper magnet wire and precision winding minimize audio signal loss.
Extended Low-Frequency Response	Laminated core extends low-frequency response, enhancing bass reproduction.
Reliable PCB Mounting	Standard 3 + 4 through-hole DIP pins with high coplanarity and secure bobbin solder joints provide stable, repeatable insertion.
Customizable Build	Electrical specifications, dimensions, and other parameters can be customized for specific applications.

4. Applications

Suitable for audio equipment, including:

• Hi-Fi audio amplifiers
• Professional audio mixing consoles
• Preamplifier coupling
• Audio signal isolation

Figure 2 — Audio equipment applications.

5. Specifications

5.1 Specifications

Item	Value
Model	EE24
Application	Audio equipment
Phase	Single-phase
Coil Structure	Toroidal
Coil Number	Autotransformer
Product Category	Audio transformer
Material	Copper wire + Ni-steel lamination
Lead Style	Pins
Packaging	Carton
Electrical Specifications	Customized
Frequency	Low-frequency transformer
Dimensions & Other Parameters	Customized

The following content is transcribed from the specification sheet attached to the product drawing. Electrical specifications, dimensions, and other parameters are supplied on a custom basis, so no numerical electrical data is provided in the source material.

The supplied table lists the coil structure as toroidal and the coil number as autotransformer, while the supplied drawing shows a laminated core and through-hole pins. Both values are transcribed as provided; please verify the structure before publication.

5.2 Construction & Materials

The winding uses 100% pure copper magnet wire for low resistance and high conductivity, wrapped in high-temperature polyester film tape for insulation and heat resistance. A precise winding process ensures tight, uniform layering for stable performance. The core is made of nickel-steel lamination, a high-permeability material that maintains low distortion across the audio frequency band.

Figure 3 — Premium copper wire and insulation.

Figure 4 — Ni-steel lamination and low distortion.

5.3 Terminals & PCB Mounting

Termination uses through-hole DIP pins in a standard 3 + 4 pin layout. The pins are precisely aligned with high coplanarity for reliable board mounting, and the robust bobbin structure provides secure solder joints with long-term reliability. The device is directly compatible with SMT/DIP PCB assembly.

Figure 5 — Standard PCB pin termination.

5.4 Outline Dimensions

The outline drawing shows: top view, 27.0 mm × 24.0 mm max; side view, 22.0 mm × 25.0 mm max; front view height, 25.0 mm max. Pin spacing is 5.00 ± 0.50 mm, row spacing is 15.00 ± 0.50 mm, and pin count is 3 + 4.

Dimension	Value
Top View	27.0 mm × 24.0 mm max
Side View	22.0 mm × 25.0 mm max
Front View Height	25.0 mm max
Pin Spacing	5.00 ± 0.50 mm
Row Spacing	15.00 ± 0.50 mm
Pin Count	3 + 4

Figure 6 — Outline dimensions: top, side, front, and isometric views.

5.5 Compliance Certifications

Mark	Supply Status
CE	CE mark, conformity
RoHS	RoHS compliant
ISO	ISO9001 quality management system
UL	UL recognized component

Certificate numbers or test reports are not included in the supplied material; please attach certificates before publication.

Figure 7 — International quality standards and compliance certifications supplied with the product.

6. Quality & Testing Assurance

Every unit undergoes 100% electrical testing to ensure high consistency and stability, and products are supplied in through-hole DIP PCB assembly form. Consistent frequency response, high reliability, and durability are the stated outcomes of this testing.

Figure 8 — 100% electrical testing.

Figure 9 — EE24 transformer on the test bench.

Figure 10 — EE24 transformer mounted on a PCB.