RLD30P160UFF Equivalent & Substitute Parts

Part Overview

The RLD30P160UFF is a polymeric PTC resettable fuse manufactured by Littelfuse Inc. in the POLY-FUSE® RLD30 series. This component is rated for 30V maximum voltage with a 1.6A hold current and 3.2A trip current, designed for through-hole radial mounting in disc configuration. The part is currently obsolete, making identification of equivalent and substitute components essential for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

RLD30P160UFF

Littelfuse Inc.In Stock: 809RLD30P160UFF Datasheet

Current PartRFQ

RUEF160-AP

Littelfuse Inc.In Stock: 6133RUEF160-AP Datasheet

DirectRFQ

30R160UPR

Littelfuse Inc.In Stock: 1238430R160UPR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RLD30P160UFF is determined by strict equivalence across the following critical parameters:

• Voltage rating: 30V maximum
• Hold current: 1.6A maximum
• Trip current: 3.2A
• Time to trip: 8 seconds
• Initial resistance: 30 mOhms minimum
• Post-trip resistance: 110 mOhms maximum
• Operating temperature: -40°C to 85°C
• Mounting configuration: Through-hole radial disc
• Physical dimensions: 0.350" L x 0.118" W with lead spacing within 0.201" ± tolerance

Two substitute parts meet these criteria: the RUEF160-AP (direct manufacturer equivalent) and the 30R160UPR (parametric equivalent). Both maintain identical electrical performance specifications and physical form factors compatible with the original RLD30P160UFF footprint.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are manufactured by Littelfuse Inc. and maintain full electrical and mechanical compatibility with the RLD30P160UFF.

The RUEF160-AP is an active production part in the PolySwitch® RUEF series with expanded regulatory approvals (CQC, CSA, TUV, UL) and higher maximum current rating (100A vs. 40A). This part is suitable for applications requiring broader certification coverage and is recommended for new designs or systems requiring extended component availability.

The 30R160UPR is an active production part in the POLY-FUSE® 30R series with the same regulatory approvals as the original RLD30P160UFF (cURus, TUV) and identical maximum current rating (40A). This part maintains the closest design lineage to the obsolete RLD30P160UFF and is recommended for direct replacement in existing systems where certification parity is required.

Both parts are ROHS3 compliant and REACH unaffected. Lead spacing differences (0.199" for RUEF160-AP vs. 0.201" for both RLD30P160UFF and 30R160UPR) are within standard PCB tolerance ranges for through-hole radial components.

Frequently Asked Questions (FAQ)

Q: Can RUEF160-AP and 30R160UPR be used interchangeably with RLD30P160UFF?

A: Both parts are electrically and mechanically equivalent to the RLD30P160UFF across all critical parameters: voltage, hold current, trip current, resistance characteristics, and operating temperature range. Physical dimensions and lead spacing are compatible with standard through-hole radial disc footprints. Both are direct substitutes.

Q: What is the difference between RUEF160-AP and 30R160UPR?

A: The primary differences are product series designation and regulatory approvals. RUEF160-AP (PolySwitch® RUEF series) carries broader certifications (CQC, CSA, TUV, UL) and a higher maximum current rating (100A). The 30R160UPR (POLY-FUSE® 30R series) maintains the same certifications as the original RLD30P160UFF (cURus, TUV) with a 40A maximum current rating. Both meet the electrical specifications of the RLD30P160UFF.

Q: Does the lead spacing difference between RUEF160-AP (0.199") and RLD30P160UFF (0.201") affect PCB compatibility?

A: No. The 0.002" (0.05mm) difference is within standard manufacturing tolerances for through-hole radial components and does not affect PCB footprint compatibility or insertion reliability.

Q: Are both substitute parts available in production quantities?

A: Yes. RUEF160-AP is available in cut tape packaging with 6067 pieces in stock. 30R160UPR is available in cut tape packaging with 12300 pieces in stock. Both are active production parts from Littelfuse Inc.

Q: Which substitute part should I select for a new design?

A: For new designs, RUEF160-AP is recommended due to its active production status, expanded regulatory approvals (CQC, CSA, TUV, UL), and higher maximum current rating. For direct replacement of existing RLD30P160UFF assemblies, 30R160UPR maintains design continuity within the POLY-FUSE® product family.