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Littelfuse 0.75 A Resettable Fuse, 33V DC, Surface Mount Polyfuse PTC, 1812L Series 1812L075/33DR
Specifications
| Country of Origin | India |
|---|---|
| Voltage | 33V dc |
| Brand | Littelfuse |
| Height | 1.55mm |
| Length | 4.73mm |
| Model | 1812L075/33DR |
| Width | 3.41mm |
| Current Rating | 20A |
| Series | 1812L |
| Maximum Operating Temperature | 85°C |
| Package Type | Reel |
| Minimum Operating Temperature | -40°C |
| Package Size | 1812 |
| Trip Current | 1.5A |
| Power Dissipation | 0.8W |
| Terminal Material | Tin Plated Copper |
| Standards/Approvals | RoHS |
| Time to Trip | 0.2s |
| Hold Current | 0.75A |
| Minimum Resistance | 0.11Ω |
| Maximum Resistance | 400mΩ |
Key Features
- Surface mount technology fuse designed for overcurrent protection.
- Automotive-grade resettable polyfuse with automatic reset after fault clearing.
- Compact 1812 package for space-constrained applications.
- Trip current rated at 1.5 A with fast trip time of 0.2 seconds.
- Suitable for security systems, power supplies, automotive and medical equipment.
- Features tin plated copper terminals for reliable soldering and conductivity.
- Operates within temperature range of -40°C to 85°C.
- Power dissipation of 0.8 W supports thermal management in dense circuits.
Product Description
Littelfuse 1812L075/33DR is a 0.75 A resettable polyfuse designed to provide reliable overcurrent protection in low voltage DC circuits. The 1812L series fuse features surface mount technology, enabling compact, maintenance-free protection ideal for modern electronic devices.
This fuse automatically switches from a low resistance state to a high resistance state when exposed to excessive current or short circuit conditions. Once the fault condition clears and power is removed, it resets automatically, allowing thousands of cycles without replacement.
Key applications include security systems, power supplies, transformers, automotive electronics, medical instrumentation, computers, audiovisual systems, and telecommunications equipment. This makes the 1812L075/33DR suitable for diverse industrial, commercial, and automotive use cases where space and reliability are critical.
The fuse has a hold current of 0.75 A, trip current of 1.5 A, and rated voltage of 33V DC. It guarantees a fast trip time of 0.2 seconds to protect sensitive components. The 1812 package measures 4.73 mm length, 3.41 mm width, and 1.55 mm height, with tin-plated copper terminals providing excellent solderability and conductivity.
Operating temperature ranges from -40°C to 85°C with a power dissipation of 0.8 W. Its low resistance (minimum 0.11 Ω) and RoHS compliance affirm both performance and environmental standards.
Surface mount resettable polyfuse for overcurrent protection. 0.75 A hold current, 1.5 A trip current with 0.2 s trip time. Compact 1812 package measuring 4.73 x 3.41 x 1.55 mm. Tin plated copper terminals for high conductivity and reliability.
Operating temperature range of -40°C to 85°C. RoHS compliant for environmental and safety standards. Power dissipation of 0.8 W suitable for thermal management. Ideal for automotive, medical, instrumentation, and telecom applications.
Reel packaging supports automated assembly processes.
This Littelfuse Resettable Fuse series allows designers to implement compact, reliable circuit protection, reducing maintenance and downtime in industrial, automotive, and electronic applications. Browse additional Littelfuse components and fuse types on EnvMart for comprehensive circuit protection solutions.
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Frequently Asked Questions
The hold current rating of this model is 0.75 A.
The trip current for this fuse is 1.5 A.
It is rated for a maximum voltage of 33 V DC.
The 1812 package measures 4.73 mm in length, 3.41 mm in width, and 1.55 mm in height.
The maximum operating temperature is 85°C.
The minimum operating temperature is -40°C.
This fuse has a fast trip time of 0.2 seconds.
The power dissipation for this model is 0.8 W.
The terminals are made of tin-plated copper, which provides reliable soldering and conductivity.
It is suitable for applications including security systems, power supplies, automotive electronics, and medical instrumentation.
Yes, this resettable fuse is RoHS compliant, meeting environmental and safety standards.
This model is packaged in a reel format, which supports automated assembly processes.
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