RUEF110-1 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The RUEF110-1 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc. in the PolySwitch® RUEF series. This component is rated for 30V maximum voltage with a 1.1A hold current and 2.2A trip current, designed for through-hole radial mounting in disc configuration. The RUEF110-1 is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

RUEF110-1

Littelfuse Inc.In Stock: 763RUEF110-1 Datasheet

Current PartRFQ

RUEF110

LittelfuseIn Stock: 3387RUEF110 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The RUEF110 serves as the direct equivalent to the obsolete RUEF110-1. Substitution is based on identical electrical and mechanical parameters across all critical specifications: voltage rating, hold current, trip current, resistance characteristics, operating temperature range, and physical dimensions. Both components are polymeric PTC resettable fuses within the PolySwitch® RUEF series with identical through-hole radial disc mounting configurations and lead spacing. The primary distinction is product status and packaging format: RUEF110-1 is obsolete with radial packaging, while RUEF110 is active with bag packaging. All electrical performance parameters, thermal characteristics, and mechanical form factors remain unchanged, establishing full functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The RUEF110 is the recommended substitute for the obsolete RUEF110-1. Both components maintain identical electrical specifications, thermal operating ranges, and mechanical dimensions. The RUEF110 carries active product status with higher inventory availability (3289 pcs vs. 708 pcs), ensuring long-term supply chain reliability. Both parts maintain equivalent regulatory compliance certifications including CQC, CSA, TUV, and UL approvals, with identical RoHS3 and REACH compliance status. The transition from RUEF110-1 to RUEF110 presents no functional or performance degradation and is suitable for direct replacement in existing designs without circuit modification or re-qualification.

Frequently Asked Questions (FAQ)

Q: Can RUEF110 directly replace RUEF110-1 in existing designs? A: Yes. Both components are electrically and mechanically identical across all specified parameters. The RUEF110 is the active production equivalent of the obsolete RUEF110-1 and requires no design changes for substitution.

Q: What is the difference between RUEF110-1 and RUEF110? A: The primary differences are product status and packaging format. RUEF110-1 is obsolete with radial packaging, while RUEF110 is active with bag packaging. All electrical performance, thermal characteristics, and physical dimensions remain identical.

Q: Are the regulatory certifications the same for both parts? A: Yes. Both RUEF110-1 and RUEF110 carry identical approvals from CQC, CSA, TUV, and UL, with matching RoHS3 compliance and REACH unaffected status.

Q: What are the critical parameters for substitution compatibility? A: Voltage rating (30V), hold current (1.1A), trip current (2.2A), operating temperature range (-40°C to 85°C), and through-hole radial disc mounting configuration must remain constant for functional equivalence.

Q: Is there any inventory advantage to selecting RUEF110 over RUEF110-1? A: Yes. RUEF110 has significantly higher inventory availability (3289 pcs) compared to RUEF110-1 (708 pcs), providing better procurement reliability and shorter lead times.