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Littelfuse RUEF1852 overcurrent protection device

These reliability-tested resettable PolySwitch devices are designed for overcurrent protection in electronic circuits. The RUEF series offers a balance of voltage rating at 30V and hold currents up to 9A, making them ideal for use in consumer electronics, communication equipment, and industrial controls. Featuring RoHS compliance, lead-free construction, and halogen-free materials, these radial leaded PTC thermistors ensure reliable circuit protection. Their compact form factor and various termination options facilitate high-volume manufacturing, providing durability and safety for various low-voltage, overcurrent protection applications.

Authorized Distributors
Source:Newark
Part No:RUEF185-2
Stock:4649
Inv Date:05-28-2026
Price: Unit price: $0.18
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Source:Newark
Part No:RUEF185-2
Stock:3000
Inv Date:05-28-2026
Price: Unit price: $0.371
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Source:DigiKey
Part No:RUEF185-2
Stock:15000
Inv Date:05-28-2026
Price: Unit price: $0.23729
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Source:DigiKey
Part No:RUEF185-2
Stock:0
Inv Date:05-28-2026
Price: Unit price: $0.51115
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Part No:RUEF185-2
Stock:4975
Inv Date:05-29-2026
Price: Unit price: $0.59
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Part No:RUEF185-2
Stock:3000
Inv Date:05-28-2026
Price: Unit price: $0.4143
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Part No:RUEF185-2
Stock:0
Inv Date:05-28-2026
Price: Unit price: $0.295
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Source:Arrow EU
Part No:RUEF185-2
Stock:4362
Inv Date:05-29-2026
Price: N/A
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Littelfuse RUEF1852 overcurrent protection device Specifications:

  • Voltage Rating: 30V
  • Hold Current: up to 9A
  • Maximum Trip Current: 18A for 9A hold current device
  • Resistance at 20°C: Max 0.22Ω, Min 0.120Ω (varies by model)
  • Maximum Resistance Post Reflow: 0.208Ω
  • Maximum Power Dissipation: 0.60W to 3.80W depending on model
  • Ambient Temperature Range: -40°C to 85°C
  • Lead Material: Tin-plated Copper or Copper Alloy (24AWG or 20AWG)
  • Solderability: Meets ANSI/J-STD-002 Category 3
  • Solder Heat Resistance: 10s at 260°C +5°C
  • Insulation Material: Flame-retardant epoxy polymer, UL 94V-0
  • Environmental Tests: Resistance change within +5% after aging, humidity, and thermal shock tests
  • Dimensions: Ranges from approximately 13.4mm to 56mm in width, height varies, package based on series
  • Operation Temperature: -40°C to 85°C
  • Packaging: Tape and reel, compliant with IEC standards
  • Agency Approvals: UL, CSA, TUV, COC

Buy the Littelfuse RUEF1852 – Reliable Overcurrent Protection for Industrial Applications

Secure your electronics with the Littelfuse RUEF1852 series overcurrent protection device, perfect for low-voltage circuits, communication gear, and industrial controls. This reliable, RoHS-compliant, lead-free thermistor features a 30V voltage rating and up to 9A hold current, ensuring safety and durability in demanding environments. Easy to incorporate with various termination options, these radial leaded devices offer dependable protection against circuit faults. Purchase online today and integrate trusted protection into your designs for enhanced safety and performance.

Order your Littelfuse RUEF1852 series radial leaded PTC thermistor today and ensure robust overcurrent protection for your electronics and industrial projects.

Frequently Asked Questions

Where can I buy Littelfuse RUEF1852?

You can click on the BUY or RFQ button to purchase RUEF1852 from an authorized Littelfuse distributor.

How do I troubleshoot issues or seek technical support for part RUEF1852?

You can download the RUEF1852 datasheet or visit the Littelfuse website for support.

Who is the manufacturer of RUEF1852?

Littelfuse

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