Bourns MF-MSHT Series PTC Resettable Fuses
Bourns MF-MSHT Series PTC Resettable Fuses are designed for overcurrent protection in high-temperature environments. These fuses under fault conditions increase their resistance dramatically and provide continuous circuit protection until the fault is cleared and power is cycled. The fuses operate within a temperature range of -40°C to 125°C and feature a standard 1812 footprint. The MF-MSHT series PTC resettable fuses are used in automotive electronics and high-temperature circuit protection applications.
Features
- Compliant with AEC-Q200 Rev-D for automotive applications
- Increases resistance dramatically under fault conditions
- Low thermal derating factor
- Provides overcurrent protection
- Returns to low-resistance state once the fault is cleared
- RoHS compliant
- Standard 1812 footprint size
- Surface mount packaging
Applications
- Automotive
- Battery
- Computer
- Consumer
- Industrial
- Telecommunications
Technical Specifications
| Parameters | Values |
|---|---|
| Maximum voltage range | 9V to 42V |
| Maximum current | 40A |
| Maximum resistance range at 23°C | 0.17Ω to 4.5Ω |
| Operating temperature range | -40°C to +125°C |
| Tripped power dissipation at 23 °C | 1.2W to 1.5W |
Video
This TTI Tech Specs video for Bourns MF-MSHT Series PTC Resettable Fuses explains that MF-MSHT Series PTC Resettable Fuses are automotive grade fuses used in a wide variety of circuit protection applications like overcurrent surge protection of electronic equipment that are required to operate at high-temperature ranges.
See video transcript below
Video Transcript
Unfortunately, we can’t hit reset whenever things go haywire in life -- but at least our electronics can with the industry-leading MF-MSHT series PTC resettable fuses from Bourns.
This series features a temperature-dependent conductive polymeric construction that allows for low resistance and high power ratings with higher hold currents at elevated temperatures compared to non-high-temp rated PTCs. Under fault conditions the PTC material heats up and becomes amorphous, effectively blocking the current flow to the load, while automatically resetting when power is cycled and the device cools.
This high-temp-rated PTC family is perfect for long road trips thanks to its AEC-Q200 qualification for automotive applications. The series offers maximum voltages between 9V and 42V and trip currents between 1A and 7A, with a max current rating of 40A.
The MF-MSHT series can operate from -40°C to +125°C and features a low thermal derating factor, providing reliable overcurrent protection in applications that operate at high temperatures.
