1. Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of your YJYGR NP-12000-30 Neon Light Electronic Transformer. Please read this manual thoroughly before use and retain it for future reference.
2. Safety Information
WARNING: DANGER HIGH VOLTAGE. This device operates at high voltage. Improper installation or handling can result in serious injury or death. Always ensure power is disconnected before installation or maintenance.
- Installation should only be performed by qualified personnel in accordance with all local and national electrical codes.
- Do not operate the transformer if it is damaged.
- Ensure proper grounding to prevent electrical shock.
- Keep the transformer away from water and moisture.
- Do not open the transformer casing. There are no user-serviceable parts inside.
3. Product Overview
The YJYGR NP-12000-30 is an electronic transformer designed to power neon light signs. It features a compact design and robust construction for reliable performance.

Front view of the YJYGR NP-12000-30 Neon Light Electronic Transformer, showing its black casing and attached power cables. The label with model and electrical specifications is visible.
Key Features:
- Built-in overload automatic circuit and ground circuit for enhanced safety.
- High power factor and low electromagnetic interference.
- Stable output and high reliability, with no mercury migration phenomenon.
- Suitable for small neon lamp signs.
4. Setup and Installation
Before beginning installation, ensure the main power supply is turned off at the circuit breaker. This transformer is designed for wall mount installation.
Wiring Connections:
- Input Connection: Connect the 220V-240V AC input power to the designated input terminals of the transformer. Refer to the wiring diagram on the unit's label.
- Output Connection: Connect the output terminals of the transformer to your neon light sign. The output is 12KV AC 30mA.
- Grounding: Ensure the transformer is properly grounded according to local electrical codes.

Close-up view of the stripped wire ends (blue, brown, green/yellow) for connection, indicating standard electrical wiring.
After all connections are secure and verified, you may restore power to the circuit.
5. Operating Instructions
Once properly installed and connected to a neon light sign, the transformer will provide the necessary high voltage to illuminate the sign. Operation typically involves activating the power supply to the transformer circuit, often via a wall switch or a pull chain switch connected to the neon sign circuit.
The transformer is designed for continuous operation within its specified load length of 4-12 meters of neon tubing.
6. Maintenance
The YJYGR NP-12000-30 transformer requires minimal maintenance. However, regular inspection is recommended to ensure safe and optimal performance.
- Cleaning: Keep the transformer casing clean and free of dust and debris. Use a dry cloth for cleaning. Do not use liquid cleaners.
- Inspection: Periodically inspect the input and output wiring for any signs of damage, fraying, or loose connections.
- Environment: Ensure the transformer is operating in a dry, well-ventilated area, free from excessive heat or moisture.
WARNING: Always disconnect power before performing any inspection or cleaning.
7. Troubleshooting
If your neon light sign is not functioning, consider the following troubleshooting steps:
- No Light: Check if the power supply to the transformer is active. Verify all wiring connections (input and output) are secure and correct.
- Flickering Light: This could indicate a loose connection or an issue with the neon tubing itself. Inspect connections.
- Overload Protection: If the transformer has shut down, its built-in overload protection may have activated. Disconnect power, wait a few minutes, and then restore power. If it trips again, the load (neon sign) may be too large or there is a short circuit.
If the issue persists after checking these points, consult a qualified electrician or contact customer support.
8. Specifications

Diagram showing the dimensions of the YJYGR NP-12000-30 Neon Light Electronic Transformer, with measurements of 135mm (5.31in) length, 95mm (3.74in) width, and 45mm (1.77in) height.
| Parameter | Value |
|---|---|
| Model | NP-12000-30 |
| Input Voltage | 220V-240V |
| Output Voltage | 12KV AC |
| Output Current | 30mA |
| Load Length | 4-12 meters |
| Material | Plastic + Metal |
| Color | Black |
| Item Weight | 800 Grams (1.76 pounds) |
| Power Source | Wired Electric, Corded Electric |
| Mounting Type | Wall Mount |
9. Warranty and Support
For warranty information and customer support, please refer to the documentation provided at the time of purchase or contact the seller/manufacturer directly. Keep your purchase receipt as proof of purchase.
For technical assistance, you may also visit the YJYGR brand page on Amazon or contact their customer service department.