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Product Detailed Parameters
- Description：POLYSWITCH RESETTABLE PPTC
- Series：POLY-FUSE®, 0805L
- Mfr：Littelfuse Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：63V
- Current - Hold (Ih) (Max)：20 mA
- Current - Trip (It)：60 mA
- Current - Max：40 A
- Time to Trip：1.5 s
- Resistance - Initial (Ri) (Min)：12 Ohms
- Resistance - Post Trip (R1) (Max)：70 Ohms
- 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)：0.049" (1.25mm)
- Lead Spacing：-
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Overview
The Littelfuse 0805L002YR is a PolySwitch resettable PPTC fuse in an 0805 surface-mount package. It features a hold current of 20 mA and a trip current of 60 mA, with a maximum voltage rating of 63 VDC. The device has a maximum resistance of 70 Ohms and a fault current rating of 40 A. Physical dimensions are 2.1 mm length, 1.35 mm width, and 1 mm height. Power dissipation is rated at 500 mW.
Feature Summary
- Provides automatic overcurrent protection by increasing resistance during fault conditions
- Supports reflow and wave soldering for standard surface-mount assembly
- Offers reliable circuit protection without requiring manual replacement
Applications
- Protection of portable electronic devices
- Overcurrent safeguarding in battery-powered equipment
- Circuit protection for telecommunications hardware
Procurement Notes
Verify the specific part number against official Littelfuse documentation to confirm electrical ratings and physical dimensions. Ensure that the selected component meets the required voltage and current specifications for the target application. Cross-reference datasheets to validate compliance with relevant industry standards and safety certifications before finalizing procurement decisions.
Selection Notes
Select this component based on the required hold current of 20 mA and the 63 VDC maximum operating voltage. Consider the 0805 footprint constraints and the 70 Ohm maximum resistance when designing the circuit layout. Evaluate thermal management requirements given the 500 mW power dissipation rating to ensure stable operation within the specified temperature range.
Part Context
This device belongs to the 0805L series of PolySwitch resettable fuses manufactured by Littelfuse. These components utilize polymer positive temperature coefficient technology to provide compact overcurrent protection. The series is designed for surface-mount applications where space efficiency and reliable circuit interruption are critical requirements.
Replacement Considerations
Consult official Littelfuse substitution guides for verified alternative part numbers. Do not assume compatibility with generic PPTC devices from other manufacturers due to potential differences in trip characteristics and voltage ratings.
