1. Introduction
This manual provides instructions for the safe and effective use of your Kircuit Car DC Adapter. This adapter is designed to power Medela Symphony Breastpumps (Type 600.0837 / 6000837) directly from a vehicle's 12-24V DC power outlet.
2. Safety Information
Please read all safety instructions before using the adapter. Failure to follow these instructions may result in electric shock, fire, or damage to the product or connected devices.
- Ensure the adapter is compatible with your device's power requirements before connecting.
- Do not expose the adapter to water, moisture, or extreme temperatures.
- Do not attempt to open, modify, or repair the adapter. Refer servicing to qualified personnel.
- Keep out of reach of children.
Built-in Safety Protections
The Kircuit Car DC Adapter incorporates multiple safety features to protect your devices:
- Short Circuit Protection: Prevents damage from electrical shorts.
- Excess Voltage Protection: Safeguards against input voltage fluctuations.
- Over Temperature Protection: Monitors and regulates internal temperature.
- Overcurrent Protection: Protects against excessive current draw.

Image: Diagram illustrating the four key safety protections integrated into the Kircuit adapter design.
3. Product Features and Design
Durable Cable Design
The power cable is constructed from high-quality materials with a thick insulation layer, designed to resist wear, tear, and abrasion from external factors. It can withstand high temperatures without melting or degrading, which is crucial for cables carrying high current loads.

Image: Detailed view of the adapter's power cable, highlighting its robust construction.
Secure Plug Design
The plugs on the power cable are well-made and designed to provide a secure and stable connection. They are engineered to handle electrical loads without overheating or posing a fire hazard, meeting UL Standard Quality for durability and safety.

Image: Visual comparison of the Kircuit adapter's plug quality against a generic plug.
4. Setup
Follow these steps to connect your Kircuit Car DC Adapter:
- Ensure your vehicle's engine is running or the accessory power outlet is active.
- Insert the car adapter plug firmly into your vehicle's 12-24V DC power outlet (cigarette lighter socket).
- Connect the output connector of the Kircuit Car DC Adapter to the power input port of your Medela Symphony Breastpump.
- Verify that the breastpump powers on correctly.

Image: The Kircuit Car DC Adapter, showing its components for connection.
5. Operating Instructions
Once the adapter is properly connected, your Medela Symphony Breastpump should receive power from your vehicle's DC outlet. Operate your breastpump according to its own user manual. The Kircuit Car DC Adapter provides a stable power supply for continuous operation.
- Always ensure a secure connection between the adapter and both the vehicle outlet and the breastpump.
- Disconnect the adapter from the vehicle's power outlet when not in use to prevent draining the vehicle's battery.
6. Maintenance
To ensure the longevity and optimal performance of your Kircuit Car DC Adapter, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to wipe the adapter. Do not use liquid cleaners or solvents.
- Storage: Store the adapter in a cool, dry place away from direct sunlight and extreme temperatures when not in use.
- Inspection: Periodically inspect the cable and connectors for any signs of damage, fraying, or corrosion. If damage is found, discontinue use and replace the adapter.
7. Troubleshooting
If you encounter issues with your Kircuit Car DC Adapter, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Breastpump does not power on. | Loose connection, vehicle outlet not active, adapter malfunction, breastpump issue. | Ensure all connections are secure. Check if the vehicle's power outlet is active (e.g., by testing with another device). Try a different vehicle outlet if available. If the issue persists, the adapter or breastpump may be faulty. |
| Adapter feels warm during use. | Normal operation, excessive load, poor ventilation. | A slight warmth is normal. Ensure the adapter is not covered and has adequate ventilation. If it becomes excessively hot, disconnect immediately and contact support. |
| Intermittent power to breastpump. | Loose connection, faulty vehicle outlet. | Check for secure connections at both ends. Ensure the vehicle's power outlet is clean and free of debris. |
8. Specifications
| Feature | Detail |
|---|---|
| Input Voltage | DC 12-24V |
| Output | DC Output (Specific voltage/amperage matched to Medela Symphony Breastpump 600.0837) |
| Compatibility | Medela Symphony Breastpump Type 600.0837 / 6000837 |
| Safety Features | Dynamic IC, Charger IC, Power Fuse for Overcharge Protection, Short Circuit Protection, Excess Voltage Protection, Over Temperature Protection, Overcurrent Protection. |
| Item Weight | 8 ounces |
9. Warranty and Support
For warranty information or technical support, please contact Kircuit customer service. Refer to the product packaging or the seller's information for specific contact details.