3D Models
Note! To download footprints and symbols, use the build and request forms below
Request (48 hours)
- Datasheet Download Datasheet
- Stock & Prices $ Price & Stock for PLA191STR
- Part Number PLA191STR
- Manufacturer LITTELFUSE
- Last Modified Date Jan 21, 2026 2:00 PM UTC
- Pinout / Pin List Click Here (Member Only)
PLA191STR Details
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Manufacturer Part Number:
PLA191STR
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Rohs Code:
Yes
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Part Life Cycle Code:
Active
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HTS Code:
8541.40.95.00
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Manufacturer:
Littelfuse Inc
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YTEOL:
6.74
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Additional Feature:
UL RECOGNIZED
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Configuration:
SINGLE
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Control Current:
0.005 A
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Control Voltage:
0.9 V
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Forward Current-Max:
0.05 A
PLA191STR Frequently Asked Questions (FAQs)
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A good PCB layout for the PLA191STR involves keeping the input and output traces separate, using a ground plane, and minimizing the distance between the device and the fuse. A 4-layer PCB with a dedicated power plane and a solid ground plane is recommended.
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To choose the correct fuse value, consider the maximum current rating of the PLA191STR (1.9A), the nominal operating current of your circuit, and the desired tripping time. A fuse with a slightly higher rating than the maximum current rating is recommended to account for tolerances and variations.
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The PLA191STR's performance is affected by temperature, with the device's current rating decreasing as temperature increases. The device is rated for operation from -40°C to 85°C, and the datasheet provides derating curves to help designers account for temperature effects.
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Yes, the PLA191STR is designed for high-reliability applications and meets various safety standards, including UL 60950-1 and IEC 60950-1. However, it's essential to follow proper design and testing procedures to ensure the device meets the specific requirements of your application.
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To troubleshoot issues with the PLA191STR, check the input voltage, output voltage, and current ratings. Verify that the device is properly soldered and that the PCB layout meets the recommended guidelines. Use a multimeter to measure voltage and current, and consult the datasheet for specific troubleshooting procedures.
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PLA191STR Overview
Use the download button to access the PLA191STR 3D model. You can still request or build the schematic symbol and PCB footprint by using the respective build or request forms on this page.
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