Introduction to PTC Thermistors
Vishay Intertechnology, Inc. has introduced an innovative series of inrush current limiting positive temperature coefficient (PTC) thermistors. These devices are tailored to optimize performance in active charge and discharge circuits, particularly in automotive and industrial settings. With the introduction of the new PTCEL High Energy series, Vishay aims to provide solutions that significantly enhance both efficiency and functionality in various applications.
Key Features of PTCEL High Energy Series
The PTCEL High Energy series thermistors showcase a maximum energy handling capability of up to 340 J, which is five times higher than many competing devices, especially in high ambient temperature conditions. This makes them ideal for applications needing robust performance. They feature a wide range of R25 resistance values, from 150 ? to 1.5 k ?, enabling designers to tailor their choices based on specific circuit requirements.
Performance at High Temperatures
One of the standout features of these thermistors is their impressive versatility when dealing with elevated temperatures. The devices can handle 180 J at 85 °C and continue to provide reliable performance at up to 130 J at 105 °C. This functionality aids engineers in saving space and reducing costs, as fewer components are necessary for creating efficient circuits. The devices support high maximum voltages of 1200 VDC, making them suitable for a variety of demanding applications.
Applications of the PTCEL Series
The PTCEL High Energy series is AEC-Q200 qualified and engineered with self-protecting features, safeguarding against overheating. These thermistors offer essential current limitation and overload protection for several applications including AC/DC and DC/DC converters, battery management and emergency discharge circuits, on-board chargers, heat pumps, and motor drives. Such versatility is critical for systems that require resilience against high inrush power cycles, as these thermistors withstand over 100,000 cycles while also tolerating peak power levels of up to 25 kW.
Construction and Packaging
Each thermistor in the PTCEL High Energy series is constructed using a ceramic pellet that is soldered between two tinned CCS wires and coated with a high-temperature silicone lacquer that complies with UL 94 V-0 standards. To enhance manufacturing efficiency and reduce associated costs, these thermistors are available in tape on reel packaging, making them compatible with automated pick and place equipment. The standard leadwire pitch is set at 10 mm, although 5.0 mm and 7.5 mm pitches are also available for specific needs.
Device Specifications
The specifications of the PTCEL High Energy series are noteworthy. Below is a summary of key parameters for one of the models:
- Part Number: PTCEL67R
- Resistance (R25): 150 to 1500 ?
- Tolerance of R25: 30%
- Max AC Voltage (VRMS): 460 to 800 V
- Max DC Voltage (VDC): 650 to 1200 V
- Maximum Energy @ 25 °C: 340 J
- Heat Capacity: 2.6 J/K
- Lead Pitch: 5.0, 7.5, 10.0 mm
Conclusion
Samples and production quantities of the PTCEL High Energy series thermistors are readily available, with an expected lead time of 10 weeks. Vishay Intertechnology has established itself as a leader in manufacturing a vast array of discrete semiconductors and passive electronic components vital for groundbreaking designs across multiple sectors, including automotive, industrial, consumer electronics, and medical markets. Positioned as a Fortune 1,000 Company listed on the NYSE with the ticker VSH, Vishay continues to innovate and expand its portfolio of solutions.
Frequently Asked Questions
What applications are suitable for Vishay's PTC thermistors?
The PTC thermistors are ideal for automotive and industrial applications, particularly in charge and discharge circuits.
What is the energy handling capability of the new thermistors?
The PTCEL High Energy series thermistors can handle a maximum energy of 340 J.
How do these thermistors perform at high temperatures?
They maintain reliable performance up to 180 J at 85 °C and 130 J at 105 °C, making them suitable for various environments.
Are there specific standards these thermistors comply with?
Yes, these thermistors are AEC-Q200 qualified and adhere to UL 94 V-0 standards for safety and reliability.
Where can I find more information about these thermistors?
Further details can be found on Vishay's official website or through their customer support channels.
