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MINISMDC350LR-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 6V 3.5A 1812
- Series：PolySwitch®
- Mfr：Littelfuse Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：6V
- Current - Hold (Ih) (Max)：3.5 A
- Current - Trip (It)：8:00 AM
- Current - Max：50 A
- Time to Trip：-
- Resistance - Initial (Ri) (Min)：6 mOhms
- Resistance - Post Trip (R1) (Max)：25 mOhms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：1812 (4532 Metric), Concave
- Size / Dimension：0.179" L x 0.128" W (4.55mm x 3.24mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.017" (0.43mm)
- Lead Spacing：-
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Overview
The Littelfuse MINISMDC350LR-2 is a PolySwitch resettable PPTC fuse from the LoRho SMD series, designed for surface-mount PCB applications. It features a 1812 package with a hold current of 3.5 A and a trip current of 8 A. The device supports a maximum voltage of 6 V and has a low resistance of 25 mOhms. It offers a fault current rating of 50 A and a power dissipation of 1 W. This component provides reliable overcurrent protection in compact electronic circuits.
Feature Summary
- Provides reliable overcurrent protection by raising resistance as it heats to limit current flow
- Features low-resistance design for efficient circuit performance
- Includes built-in thermal disconnect function to prevent catastrophic failure
Applications
- Protection for battery packs and rechargeable batteries
- Overcurrent protection in handheld electronics
- Circuit safeguarding in LED lighting systems
- Protection for networking equipment and ac-dc power adapters
Procurement Notes
This component is officially listed as End-of-Life (EOL) by Littelfuse. Mouser indicates that the product is not currently sold in certain regions due to availability constraints. Verify the EOL status and check for valid substitute part numbers before finalizing procurement plans, as direct replacement may require design adjustments.
Selection Notes
Select this device for applications requiring low-profile surface-mount overcurrent protection with a 6 V maximum rating. Ensure the operating current remains below the 3.5 A hold current to prevent unintended tripping. Consider the 1812 package size for space-constrained PCB layouts and verify compatibility with lead-free reflow soldering processes.
Part Context
The MINISMDC350LR-2 belongs to the PolySwitch LoRho SMD family, which specializes in low-resistance resettable fuses. These devices are engineered to provide robust protection for sensitive components while minimizing power loss. The series is widely used in automotive, telecom, and consumer electronics for reliable circuit safeguarding.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. As the part is marked End-of-Life, consult Littelfuse technical support or authorized distributors for validated cross-reference recommendations suitable for your specific application requirements.
