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Littelfuse RUEF250 PolySwitch Circuit Protector

The RUEF250 is a radial leaded PolySwitch resettable circuit protection device suitable for safety, industrial, and portable electronics. It features high voltage ratings, fast trip times, low resistance, and a hold current of 2.5A at room temperature. With a maximum voltage of 30V and current capacity of 100A, it is UL, CSA, TUV, and CQC approved. The device operates across a temperature range of -40°C to 85°C, with UL94 V-0 flame-retardant epoxy insulation. Designed for high-volume electronics, it offers excellent design flexibility and reliability.

Authorized Distributors
Source:Newark
Part No:RUEF250
Stock:1277
Inv Date:05-28-2026
Price: Unit price: $0.546
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Source:DigiKey
Part No:RUEF250
Stock:33359
Inv Date:05-28-2026
Price: Unit price: $0.58
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Source:DigiKey
Part No:RUEF250
Stock:0
Inv Date:05-28-2026
Price: Unit price: $0.76427
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Part No:RUEF250
Stock:397
Inv Date:05-29-2026
Price: Unit price: $0.49
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Part No:RUEF250
Stock:0
Inv Date:05-28-2026
Price: Unit price: $0.22
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Part No:RUEF250
Stock:758
Inv Date:05-28-2026
Price: Unit price: $0.629
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Part No:RUEF250
Stock:16442
Inv Date:05-28-2026
Price: Unit price: $0.305
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Source:Arrow EU
Part No:RUEF250
Stock:42000
Inv Date:05-29-2026
Price: N/A
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Part No:RUEF250
Stock:202
Inv Date:05-29-2026
Price: N/A
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Littelfuse RUEF250 PolySwitch Circuit Protector Specifications:

  • Hold Current: 2.5A at 20°C
  • Maximum Voltage: 30V
  • Maximum Current: 100A
  • Resistance: 0.07 ohms at 20°C one hour post-trip
  • Operation Temperature: -40°C to 85°C
  • Flame-retardant Epoxy Polymer: UL94 V-0
  • Lead Material: Tin-plated Copper (24AWG)
  • Solderability: Meets ANSI/J-STD-002 Category 3
  • Solder Heat Tolerance: 10s at 260°C +5°C for larger sizes
  • RoHS & ELV Compliant
  • Agency Recognition: UL, CSA, TUV, CQC

Buy the PolySwitch 250 U 250 – Reliable Circuit Protection Device for Industrial Applications

Purchase the Littelfuse RUEF250 online today—designed for safety, reliability, and quick response in high-voltage electronic circuits. This radial leaded resettable device offers a maximum voltage of 30V, a hold current of 2.5A, and is approved by UL, CSA, TUV, and CQC. Its flame-retardant epoxy insulation ensures durability, while its low resistance of 0.07 ohms provides efficient protection for safety-critical applications. Ideal for industrial controls, portable electronics, and high-volume manufacturing, it guarantees excellent performance and long-term reliability.

Get Littelfuse RUEF250 today—built for high voltage and fast trip times in electronic safety and industrial protection.

Frequently Asked Questions

Where can I buy Littelfuse RUEF250?

You can click on the BUY or RFQ button to purchase RUEF250 from an authorized Littelfuse distributor.

How do I troubleshoot issues or seek technical support for part RUEF250?

You can download the RUEF250 datasheet or visit the Littelfuse website for support.

Who is the manufacturer of RUEF250?

Littelfuse

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