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Product Detailed Parameters
- Description：PTC RESET FUSE 3.5A 6V 0805
- Series：POLY-FUSE®, LoRho
- 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)：7:00 AM
- Current - Max：50 A
- Time to Trip：5 s
- Resistance - Initial (Ri) (Min)：3 mOhms
- Resistance - Post Trip (R1) (Max)：25 mOhms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：0805 (2012 Metric), Concave
- Size / Dimension：0.083" L x 0.053" W (2.10mm x 1.35mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.055" (1.40mm)
- Lead Spacing：-
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Overview
The Littelfuse 0805L350SLYR is a PolySwitch resettable PTC device in the Low Rho series, housed in an 0805 (2012 metric) surface-mount package. It features a hold current of 3.5 A and a trip current of 7.0 A at maximum voltage of 6 VDC. The component has a maximum resistance of 40 mOhms and a fault current rating of 50 A. Operating temperature ranges from -40°C to +85°C, with power dissipation of 600 mW. Physical dimensions are 2.2 mm length, 1.5 mm width, and 0.75 mm height.
Feature Summary
- Provides automatic circuit protection through reversible resistance increase during overcurrent events
- Delivers low initial resistance to minimize voltage drop and power loss in sensitive circuits
- Supports high fault current interruption capability for robust system safety
Applications
- Portable electronic devices requiring compact circuit protection
- Battery-powered equipment safeguarding against overload conditions
- Communication hardware protecting signal lines from transient faults
Procurement Notes
Verify the specific suffix YR against official Littelfuse documentation to confirm tape and reel packaging specifications. Ensure the Low Rho variant matches design requirements for minimal impedance. Cross-reference RoHS compliance status using the manufacturer's latest certification records before finalizing procurement orders.
Selection Notes
Select this component when circuit designs demand a 3.5 A hold current within a strict 0805 footprint. The 6 VDC rating suits low-voltage logic and battery applications. Engineers must account for the 40 mOhm maximum resistance to ensure adequate signal integrity and thermal management under normal operating conditions.
Part Context
This part belongs to the 0805L series of PolySwitch resettable fuses manufactured by Littelfuse. The Low Rho designation indicates optimized conductivity compared to standard variants. It serves as a reusable alternative to traditional one-time fusible links in modern electronics assembly processes.
Replacement Considerations
Direct substitutes include other 0805L series parts with matching 3.5 A hold current ratings. Verify that replacement components maintain identical 6 VDC voltage ratings and compatible physical dimensions for seamless PCB integration without layout modifications.
