Volkswagen Audi Skoda Seat Thermal Fuse Relay Amp 15A 12V 443937105B

Volkswagen Audi Skoda Seat Thermal Fuse Relay Amp 15A 12V is an original VAG group component designed to protect electrical circuits in vehicle installations. This specialized thermal fuse relay ensures stable operation of electrical systems while maintaining the appropriate level of current protection. Thanks to its factory origin from the Audi brand, it maintains the correct operating parameters and fitment for the manufacturer's installation.

Specifications and technical data

• SKU: 443937105B-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 443937105B
• Substitutable numbers: 443937105B, 443 937 105 B
• Category: Relays

Purpose and function in the electrical system

The thermal fuse relay in the Amp 15A 12V version is responsible for controlling a selected electrical circuit and protecting it against thermal overload. It is used in low-voltage passenger vehicle installations where a combination of switching and protection functions in a single, compact module is required.

This type of solution allows for:

• relieving the main switches and control modules,
• protecting the circuit against overheating thanks to the built-in thermal fuse,
• maintaining stable operating parameters at nominal current load.

Advantages of using an original relay

Using an original VAG group thermal fuse relay is particularly important in systems where parameter repeatability and compliance with factory documentation are essential. This component has been designed to work in 12V installations, which ensures correct response times and appropriate thermal characteristics. As a result, it reduces the risk of malfunction of receivers, such as comfort modules, interior equipment elements, or selected body components.

The original design translates into:

• consistent cooperation with the factory wiring harness,
• proper fitment to the relay socket,
• maintaining compliance with the vehicle manufacturer's specifications.

Performance characteristics and installation

The Thermal Fuse Relay Amp 15A 12V belongs to the Relays category, meaning it is an actuator in the electrical system responsible for switching circuits on and off under load. The module's design allows for installation in a standard relay socket used in VAG group vehicles, which facilitates replacement during service or repair.

When selecting this type of component, it is crucial to pay attention to:

• compatibility with 12V installations,
• appropriate current range of the circuit,
• intended use for a specific application in the vehicle (e.g., selected equipment circuits).

Component condition and service application

The offered thermal fuse relay comes from the used parts segment, making it a cost-effective solution while maintaining factory specifications. This type of component is often chosen for maintenance repairs when it is necessary to restore the correct operation of the electrical system without interfering with its design. It works well both as a replacement for a damaged relay and as a component used preventively during broader service work within electrical systems.

System expansion and selection of related components

If you are planning a comprehensive repair or upgrade of the electrical system area in your Audi and need other elements from the same group, such as additional relays, control modules, or circuit protection, check the available parts in the Audi Relays category.

For extensive drivetrain modifications or changes in electrical system load, it is also worth paying attention to the selection of gear ratios and operating characteristics of drivetrain components – you will find practical tips in this regard in the article Dismantled drive axles and differentials – how to choose gear ratios for your driving style, which discusses the relationships between drivetrain configuration and vehicle operation.