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Littelfuse 30R300UU Polyfuse

The 30R Series radial lead Polyfuse resettable PTCs provide overcurrent protection for low-voltage applications up to 30V, ideal for computer, automotive, and electronic device use. Made with flame-retardant epoxy and RoHS compliant materials, these devices reset automatically after fault conditions, offering reliable, durable protection. They feature fast trip times, suitable for protecting sensitive circuitry from overloads. The devices are solderable, with specific maximum soldering temperatures, and designed for natural air convection cooling. Available in various current ratings up to 9A, they ensure safety and performance in compact electronic environments.

Authorized Distributors
Source:Newark
Part No:30R300UU
Stock:2
Inv Date:05-28-2026
Price: Unit price: $1.56
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Source:DigiKey
Part No:30R300UU
Stock:7648
Inv Date:05-28-2026
Price: Unit price: $1.1
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Part No:30R300UU
Stock:1450
Inv Date:05-29-2026
Price: Unit price: $0.91
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Part No:30R300UU
Stock:399
Inv Date:05-28-2026
Price: Unit price: $0.32
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Part No:30R300UU
Stock:0
Inv Date:05-28-2026
Price: Unit price: $0.4872
Buy/RFQ:
Part No:30R300UU
Stock:0
Inv Date:05-28-2026
Price: Unit price: $0.4872
Buy/RFQ:
Part No:30R300UU
Stock:1841
Inv Date:05-28-2026
Price: Unit price: $0.365
Buy/RFQ:
Part No:30R300UU
Stock:50
Inv Date:05-29-2026
Price: N/A
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Littelfuse 30R300UU Polyfuse Specifications:

  • Voltage Rating: 30V DC
  • Current Range: 0.90A to 9.00A
  • Temperature Range: -40°C to +85°C
  • Resistance at 23°C (Hold): varies by model, e.g., 0.05Ω to 18Ω
  • Resistance at 23°C (Trip): varies by model, e.g., 0.1Ω to 20Ω
  • Maximum Voltage: 30V DC
  • Trip Time: Fast trip times, specific to current rating
  • Insulation: Cured, flame-retardant epoxy polymer (UL 94V-0 compliant)
  • Soldering Temperature: Max 260°C, time limited to 60 min.
  • Solderability: Per MIL-STD-202, Method 208E
  • RoHS Compliance: Yes, halogen-free materials since 2010
  • Marking: Voltage, current ratings, date code, ‘LF’ identifier
  • Mechanical: Radial leaded with specific lead protrusions, gap, and spacing parameters
  • Application: Overcurrent protection for electronics, automotive, and peripherals
  • Packaging: Bulk or tape & ammo options, quantity varies

Buy the Littelfuse Series 30R Polyfuse: 30R300U

Order the Littelfuse Polyfuse Series 30R300U now to experience reliable, resettable overcurrent protection ideal for sensitive electronics and automotive applications. Engineered with high-quality, flame-retardant epoxy and RoHS compliant materials, this device offers fast trip times and durable construction for long-term use. Suitable for low-voltage circuits up to 30V, it provides automatic reset after overloads, ensuring continuous, safe operation. Easy to solder with specified temperature limits, it’s the perfect choice for engineers seeking dependable circuit protection and compliance with global safety standards.

Get Littelfuse 30R300U today—built for precision and long-lasting durability in electronic overcurrent protection.

Frequently Asked Questions

Where can I buy Littelfuse 30R300UU?

You can click on the BUY or RFQ button to purchase 30R300UU from an authorized Littelfuse distributor.

How do I troubleshoot issues or seek technical support for part 30R300UU?

You can download the 30R300UU datasheet or visit the Littelfuse website for support.

Who is the manufacturer of 30R300UU?

Littelfuse

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