Littelfuse, Inc. · NASDAQ:LFUS

Littelfuse — Investor Presentation (2021)

13 slides from Littelfuse's investor presentation, 2021

1. Slide 1: Wind Energy Solutions

   Wind Energy Solutions PROTECT CONTROL SENSE — } > = 2021

2. Slide 2: Wind Energy

   Wind Energy Wind Energy is the process by which the wind is used to generate mechanical power or electricity  One of the fastest growing forms of clean energy  Second largest renewable energy source for power generation  Cost-effective  Sustainable  Fewer effects on the environment than many ot

3. Slide 3: Wind Energy Challenges

   Wind Energy Challenges  A wind turbine can have as many as 8,000 parts to operate  Typical lifespan 20 to 25 years with proper maintenance and protection  Runs 24/7 (if there is wind)  Operates under vibration  Has to operate in extreme temperatures  Located in isolated or off-shore locations

4. Slide 4: Control, Sensing and Circuit Protection Solutions

   Control, Sensing and Circuit Protection Solutions Benefits:  Improves safety with protection from – Arc flash – Surges – Overcurrents Dc Disconnect Switches Arc-Flash Relays  Enhances system efficiencies through – Temperature monitoring – Fault identification  Minimizes downtime High-Speed Semico

5. Slide 5: Littelfuse Control, Sensing and Circuit Protection Solutions for Wind Turbines

   Littelfuse Control, Sensing and Circuit Protection Solutions for Wind Turbines A Control B Bearings C Gear Box D Mechanical Panel Temperature Temperature Temperature Brakes Temperature Sensors Sensors Sensors Sensors D A B C E F G E Generator/Stator Winding Temperature Sensors F Switchge G Transform

6. Slide 6: POWR-SPEED High-Speed Semiconductor Fuses

   POWR-SPEED High-Speed Semiconductor Fuses Provides overcurrent protection  Designed for modern-day sensitive power electronics devices that require superior protection against overcurrent  Offers extreme current-limiting protection  Balanced performance for longevity  Available in various sizes

7. Slide 7: Arc-Flash Relays

   Arc-Flash Relays Protects against arc-flash  Microprocessor-based device  Uses optical sensors to detect the onset of a flash  Responds in less than 1 ms  Greatly reduces the total clearing time and the amount of energy released through an arcing fault  Reduces damage to equipment  Decreases d

8. Slide 8: Surge Protective Devices

   Surge Protective Devices Safeguards components from transient overvoltage or surges  Type 2 SPD2 series for branch circuits  Higher nominal and total discharge current protection  Globally compliant, pluggable design is easy to install  Mitigates costly equipment damage  Decreases downtime  Ap

9. Slide 9: Temperature Sensors

   Temperature Sensors Helps regulate the temperature in the system to increase efficiencies and prevent destruction of components from extreme temperatures  Prevents parts from premature burnout or causing fires  Increases efficiencies/maximizes output  Decreases downtime  Applications – Bearings

10. Slide 10: Temperature Sensors continued…

    Temperature Sensors continued…  Detects and measures the average heat or thermal energy in a medium  Negative Temperature Coefficient (NTC) Thermistors  Known for their fast response  Are ideal for temperature measurement and control applications  Resistance Temperature Detectors (RTDs)  Preci

11. Slide 11: Dc Disconnect Switches

    Dc Disconnect Switches Isolates circuits when repairs are needed  Quickly breaks or resumes the flow of current safely  Prevents shock hazards  Protects personnel  Energy-efficient and compact  Application – Switchgear including disconnect devices 11 Confidential and Proprietary | Littelfuse, I

12. Slide 12: Information

    Information For more information visit: Littelfuse.com/RenewableEnergy 12 Confidential and Proprietary | Littelfuse, Inc. © 2020

13. Slide 13: Thank You

    Thank You 1-800-TEC-FUSE techline@littelfuse.com Littelfuse.com/RenewableEnergy 13 Confidential and Proprietary | Littelfuse, Inc. © 2020

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