1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your PTCYIDU JQ-31A3-48V-200W PTC Heater. Please read this manual thoroughly before using the product and retain it for future reference.
The PTCYIDU JQ-31A3-48V-200W is a high-quality, self-regulating PTC (Positive Temperature Coefficient) heating element designed for various applications requiring stable and efficient heating. It features surface insulation, quick heat-up times, and a long service life.

2. Specifications
| Feature | Description |
|---|---|
| Product Name | PTC air heater 48V 200W |
| Model Number | JQ-31A3-48V-200W |
| Brand Name | PTCYIDU |
| Rated Power | 200W |
| Rated Voltage | 48V |
| Dimension (L*W*H) | 75 x 76 x 26mm |
| Consistence Temperature | 200 ± 10 °C |
| Heat Material | PTC Thermistor |
| Heat Methods | Heat radiation by air flow |
| Lead Wire | Silicone high temperature line |
| Length of Lead Wires | 200mm |
| Length of Bare Wires | 10mm |
| Type | Electric Heater Parts, Air Heater |
| Insulated | Ceramic |
| Power Source | Electric |
| Used In | Air conditioning units, Electric Heater, Car, Equipment, General electric appliance, Air curtain machine, Humidifier |


3. Setup and Installation
The PTC heater is designed for integration into various systems. Proper wiring and airflow are crucial for its safe and effective operation.
3.1 Wiring Instructions
- For 12V/24V DC fan: The red wire is connected to the positive terminal, and the black wire is connected to the negative terminal.
- For 220V AC fan: The wiring is regardless of neutral wire and live wire.
- Heater Wiring: The heater itself is AC and DC universal, and its wiring is regardless of neutral wire and live wire.
3.2 Airflow and Placement
The heater's power consumption is non-fixed; better thermal radiation and heat dissipation will result in higher power output. Ensure adequate spacing for cold air intake and hot air exhaust.

3.3 Important Attention Points
- Fan Requirement: The heater shall work together with a fan to ensure proper heat dissipation and prevent overheating.
- Environmental Protection: The heater and fan shall not contact with liquid and dust.
- Overheat Protection: Some heaters are equipped with overheat protection devices to prevent the heater from operating at high temperatures for extended periods if the fan fails.
4. Operation
Once properly installed and wired according to the setup instructions, the PTC heater operates by converting electrical energy into heat through its PTC thermistor element. The self-regulating nature of PTC heaters means they automatically adjust their resistance to maintain a consistent temperature, preventing runaway heating.
4.1 Power On/Off
Connect the heater to the appropriate power supply (48V) as per the wiring diagram. The heater will begin to generate heat. Disconnect the power supply to turn off the heater.
4.2 Airflow Management
Ensure the fan is operational to facilitate heat transfer. The hot air output is approximately ≥50°C at 5cm from the heater surface, with cold air intake around 24°C. Maintain a spacing of at least 10mm between the heater and the fan for optimal performance.
5. Maintenance
To ensure the longevity and optimal performance of your PTC heater, follow these maintenance guidelines:
- Keep Dry: Prevent the heater and fan from coming into contact with any liquids.
- Keep Clean: Regularly inspect and clean the heater to prevent dust accumulation, which can impede airflow and heat dissipation.
- Inspect Wiring: Periodically check all wiring connections for any signs of wear, damage, or loose connections.
- Fan Functionality: Ensure the accompanying fan is always working correctly to provide adequate airflow.
6. Troubleshooting
If you encounter issues with your PTC heater, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Heater not generating heat | No power supply; Incorrect wiring; Faulty heater element. | Check power connection and voltage; Verify wiring according to Section 3.1; Contact support if heater is faulty. |
| Insufficient heating | Poor airflow; Dust accumulation; Fan not working. | Ensure fan is operating and providing adequate airflow; Clean heater and fan to remove dust; Check fan connection. |
| Heater overheating (if applicable) | Fan failure; Blocked airflow. | Ensure fan is working; Clear any obstructions to airflow. The built-in overheat protection should activate if present. |
7. User Tips
- For applications requiring precise temperature control, consider integrating an external thermostat with your PTC heater setup.
- Always ensure the heater is mounted securely to prevent vibration and potential damage to connections.
- When designing your system, remember that the heater's power output is directly related to the efficiency of heat dissipation. Optimize airflow for best results.
8. Frequently Asked Questions (FAQ)
- Q: Is PTCYIDU a trading company or a manufacturer?
- A: PTCYIDU is a professional PTC factory.
- Q: Can the product be customized to different requirements?
- A: Yes, PTCYIDU has a professional R&D team that can customize different sizes, power, and voltage according to specific requirements.
9. Warranty and Support
For any product-related inquiries, technical support, or issues with damaged items, please contact the seller directly. The manufacturer, Shanghai Yidu Electronic Co., Ltd., specializes in PTC products and offers support for their range of heaters.
A detailed user manual in PDF format may also be available for download. Please refer to the product page or contact the seller for the link to the official PDF manual.