Professional IC Distribution & Technical Solutions

The 1812L075/33DR is a PolySwitch® resettable fuse manufactured by Littelfuse. Below are its key specifications, descriptions, and features:

Specifications:

• Part Number: 1812L075/33DR
• Manufacturer: Littelfuse
• Type: Resettable PTC (Positive Temperature Coefficient) Fuse
• Hold Current (Iₕ): 750 mA (0.75 A)
• Trip Current (Iₜ): 1.5 A
• Maximum Voltage (Vmax): 33 V
• Maximum Current (Imax): 40 A
• Power Dissipation (Pd): 1.1 W (typical)
• Resistance (Rmin/Rmax): 0.08 Ω / 0.50 Ω
• Package Type: 1812 (Surface Mount)
• Operating Temperature Range: -40°C to +85°C

Descriptions:

• A resettable overcurrent protection device that automatically resets after fault conditions are removed.
• Designed for low-voltage applications (up to 33V) in consumer electronics, automotive, and industrial circuits.
• Provides reliable protection against short circuits and overcurrent events.

Features:

• Self-resetting – No need for manual replacement after tripping.
• Compact SMD design – Suitable for space-constrained PCB applications.
• Fast trip response – Quickly limits excessive current flow.
• RoHS compliant – Meets environmental regulations.
• High reliability – Long operational lifespan under normal conditions.

This device is commonly used in battery packs, power supplies, USB ports, and other circuits requiring overcurrent protection.

For detailed datasheets, refer to Littelfuse’s official documentation.