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Littelfuse RKEF300 Polyfuse Circuit Protector

The RKEF300 is a high-performance resettable polyfuse designed for circuit protection applications. Featuring a hold current of 3.00A and a maximum voltage rating of 60V, it offers reliable overcurrent protection with low resistance and fast trip times. Its compact radial-leaded design ensures easy integration into electronic circuits, making it ideal for power supplies, industrial controls, and consumer electronics. Certified by UL, CSA, and TUV, the RKEF300 complies with RoHS and ELV standards, ensuring environmental safety and regulatory adherence.

Authorized Distributors
Source:Newark
Part No:RKEF300
Stock:474
Inv Date:05-28-2026
Price: Unit price: $0.833
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Source:DigiKey
Part No:RKEF300
Stock:19868
Inv Date:05-28-2026
Price: Unit price: $0.83
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Part No:RKEF300
Stock:186
Inv Date:05-29-2026
Price: Unit price: $0.69
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Source:Arrow EU
Part No:RKEF300
Stock:3250
Inv Date:05-29-2026
Price: N/A
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Part No:RKEF300
Stock:4
Inv Date:05-29-2026
Price: N/A
Buy/RFQ:

Littelfuse RKEF300 Polyfuse Circuit Protector Specifications:

  • Voltage Rating: 60V
  • Hold Current: 3.00A
  • Trip Current: 4.00A
  • Maximum Continuous Voltage: 60V
  • Power Dissipation: 1.84W
  • Resistance at 25°C: 0.973Ω
  • Trip Time: 0.04 seconds
  • Material: Flame-retardant epoxy polymer (UL 94V-0)
  • Lead Material: Tin-plated Nickel-copper Alloy (0.205mm², 26AWG)
  • Operation Temperature: -40°C to +125°C
  • Solderability: Meets ANSI/J-STD-002 Category 3
  • Solder Heat Withstand: 10 seconds at 260°C ±5°C
  • Environmental Resistance: Passive aging, humidity, thermal shock tested
  • Certification: UL, CSA, TUV recognized
  • Standards Compliance: RoHS, ELV

Buy the Buy Littelfuse RKEF300 Part Number RKEF300 Online

Enhance your electronic designs with Littelfuse RKEF300 resettable polyfuse, offering 3A hold current, 60V rating, rapid trip times, low resistance, and certified compliance. Perfect for power supply protection, industrial controls, and consumer electronics, its reliable performance ensures circuit safety and efficiency. Easy to install in radial-leaded configurations, it helps meet regulatory standards like RoHS and ELV. Order RKEF300 online today and secure dependable, environmentally friendly circuit protection for your critical electronics.

Buy Littelfuse RKEF300 now and experience unmatched reliability and performance with fast overcurrent protection and environmental safety.

Frequently Asked Questions

Where can I buy Littelfuse RKEF300?

You can click on the BUY or RFQ button to purchase RKEF300 from an authorized Littelfuse distributor.

How do I troubleshoot issues or seek technical support for part RKEF300?

You can download the RKEF300 datasheet or visit the Littelfuse website for support.

Who is the manufacturer of RKEF300?

Littelfuse

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