0603L050SLYR LITTELFUSE Resettable Fuse (Other) In Stock
The 0603L050SLYR is a Littelfuse 0603 SMT polymeric positive temperature coefficient (PPTC) resettable fuse rated at 500 mA hold current, 0.6 W power dissipation, and 1.8 mm × 1.0 mm × 0.75 mm package. It provides automatic overcurrent protection that resets after the fault is cleared, eliminating the need for manual fuse replacement. Available in stock worldwide with competitive pricing and fast shipping.
- Manufacturer
- LITTELFUSE
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- 0603L050SLYR Datasheet PDF
- Category
- Resettable Fuse
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 500 mA hold current in a 0603 (1.8 mm × 1.0 mm) SMT package enables overcurrent protection in space-constrained PCB designs
- Polymeric PTC technology automatically resets after the overcurrent fault is removed, eliminating manual fuse replacement and reducing field service costs
- 0.6 W rated power dissipation handles brief surge currents without permanent damage to the protective element
- Surface-mount tape-and-reel packaging in 7-inch reels supports automated pick-and-place assembly for high-volume production
Applications
The 0603L050SLYR is used in USB port protection circuits, portable electronics, and communication modules where a 500 mA current limit guards against overcurrent faults without manual intervention. Its small 0603 footprint makes it ideal for smartphone accessories, wearable chargers, and IoT sensor nodes where board space is at a premium. The resettable nature of the PPTC device eliminates the logistical burden of stocking and replacing conventional single-use fuses in field-deployed equipment.
Specifications
| Reach Compliance Code | Compliant |
| YTEOL | 7.4 |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Package Height | 0.75mm |
| Package Length | 1.8mm |
| Package Style | SMT |
| Package Width | 1mm |
| Packing Method | TR, 7 INCH |
| Rated Power Dissipation (P) | 0.6W |
| Reference Standard | CUL; TUV; UL |
| Resistance | 0.07Ω |
| Resistor Type | PTC RESETTABLE FUSE |
| Surface Mount | YES |
| Terminal Finish | MATTE TIN |
| Terminal Placement | DUAL ENDED |
| Terminal Shape | WRAPAROUND |
| Thermistor Application | OVERCURRENT PROTECTION |
| Working Voltage | 6V |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8533.40.80.70 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the hold current and trip current of the 0603L050SLYR under normal operating conditions?
The 0603L050SLYR has a hold current of 500 mA and a trip current of 1000 mA at 25°C ambient. Under normal load conditions below 500 mA, the device remains in its low-resistance state with less than 0.6 Ω typical resistance. When current exceeds 1000 mA, the PPTC element heats up and transitions to a high-resistance state within seconds, limiting fault current and protecting downstream circuitry.
How does the resettable PPTC mechanism in the 0603L050SLYR differ from a standard one-shot fuse in USB protection designs?
Unlike a standard one-shot fuse that permanently opens and must be manually replaced after a single overcurrent event, the 0603L050SLYR's PPTC polymer resets to its original low-resistance state once the fault is cleared and the device cools below its transition temperature. In USB port protection scenarios where users accidentally connect faulty peripherals, this self-resetting behavior allows the port to recover within 5 to 30 seconds without any technician intervention.
What PCB footprint and package dimensions does the 0603L050SLYR use for SMT assembly?
The 0603L050SLYR uses a standard 0603 SMT package measuring 1.8 mm × 1.0 mm × 0.75 mm, which matches IPC-7351 footprint land patterns widely supported in PCB design EDA tools. The part ships in 7-inch tape-and-reel packaging with a 4 mm tape pitch, compatible with all standard surface-mount pick-and-place machines running at line speeds up to 30,000 components per hour.
How does ambient temperature affect the hold current rating of the 0603L050SLYR in an industrial enclosure?
The 0603L050SLYR's 500 mA hold current is specified at 25°C. In an industrial enclosure where ambient temperature reaches 60°C, the effective hold current derate factor is approximately 0.75, reducing the safe operating current to around 375 mA. Engineers designing for elevated temperature environments must account for this derating to avoid nuisance trips when the device operates near its thermal transition point.
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