The PTCC873 is a series of positive temperature coefficient (PTC) thermistors from EPCOS (TDK). These thermistors are designed for overcurrent protection and inrush current limiting applications. They offer reliable protection against excessive currents by increasing their resistance significantly when a certain temperature is reached, effectively limiting the current flow.

Applications

• Overcurrent protection in electronic circuits
• Inrush current limiting in power supplies
• Protection of motors and transformers
• Short circuit protection in various applications
• Automotive applications, such as PTC heaters.

Features

• Positive temperature coefficient (PTC) characteristics
• Self-resetting overcurrent protection
• Compact size
• Wide range of operating voltages and currents
• Excellent surge current capability
• Fast response time
• RoHS compliant

Benefits

• Provides reliable overcurrent protection
• Eliminates the need for manual reset after a fault
• Reduces the size and cost of protection circuits
• Offers a wide range of options to suit different applications
• Withstands high surge currents
• Protects sensitive components from damage
• Complies with environmental regulations

Additional Details

The PTCC873 thermistors are available in various disc sizes and lead configurations. Their resistance increases sharply as the temperature rises above the switching temperature, providing effective overcurrent protection. These devices are typically used in series with the load to be protected. The resistance at normal operating temperature is low, but when an overcurrent condition occurs, the self-heating of the PTC causes a rapid increase in resistance, limiting the current. Once the overcurrent condition is removed and the PTC cools down, its resistance returns to its low value, allowing normal operation to resume. The exact specifications, such as trip current, resistance values, and operating voltages, vary depending on the specific model within the PTCC873 series. Refer to the datasheet for detailed electrical characteristics, temperature coefficients, and mechanical dimensions for each specific part number.