RLD60P090XF Equivalent & Substitute Parts

Part Overview

The RLD60P090XF is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., rated for 60V maximum voltage and 900 mA hold current. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part is designed for through-hole radial mounting in disc configuration and provides automatic circuit protection through thermal response characteristics.

Substiute Parts

RLD60P090XF

Littelfuse Inc.In Stock: 792RLD60P090XF Datasheet

Current PartRFQ

60R090XPR

Littelfuse Inc.In Stock: 820360R090XPR Datasheet

DirectRFQ

60R090XU

Littelfuse Inc.In Stock: 688860R090XU Datasheet

MFR RecommendedRFQ

MF-R090

Bourns Inc.In Stock: 3135MF-R090 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of polymeric PTC resettable fuses is determined by electrical equivalence across the following critical parameters: maximum voltage rating, hold current (Ih), trip current (It), time to trip, and post-trip resistance. All substitute parts listed maintain identical electrical specifications for these parameters. Mechanical compatibility is verified through matching lead spacing (0.201" / 5.10mm) and through-hole radial disc mounting configuration. Physical dimensions show minor variations within acceptable tolerances for PCB footprint compatibility. Thermal operating range remains constant across all alternatives at -40°C to 85°C.

Parameter Comparison

Engineering Selection Recommendations

For new designs and production transitions, 60R090XPR, 60R090XU, and MF-R090 are all electrically and mechanically equivalent to the obsolete RLD60P090XF. Selection between these alternatives should be based on product status and regulatory compliance requirements.

60R090XPR and 60R090XU are both active Littelfuse products with ROHS3 compliance, making them suitable for applications requiring RoHS adherence. 60R090XPR is supplied in Cut Tape packaging, while 60R090XU is supplied in Bulk packaging. Both maintain identical electrical characteristics and lead spacing.

MF-R090 is an active Bourns product with ROHS3 compliance and equivalent electrical performance. The initial resistance (Ri) specification is 140 mOhms minimum, which is lower than the 200 mOhms minimum of the Littelfuse alternatives. This difference does not affect functional substitution as post-trip resistance remains identical at 470 mOhms maximum.

All three substitute parts carry cURus and TUV approvals, matching the certification profile of the original component.

Frequently Asked Questions (FAQ)

Q: Can MF-R090 replace RLD60P090XF directly?

A: Yes. MF-R090 meets all electrical specifications including voltage rating, hold current, trip current, and time to trip. Lead spacing and mounting configuration are identical. The lower initial resistance specification (140 mOhms vs. 200 mOhms) does not prevent substitution as post-trip resistance is equivalent.

Q: What is the difference between 60R090XPR and 60R090XU?

A: Both parts are electrically and mechanically identical. The primary difference is packaging: 60R090XPR is supplied in Cut Tape (CT) format, while 60R090XU is supplied in Bulk format. Selection depends on assembly process requirements and inventory management preferences.

Q: Are all substitute parts RoHS compliant?

A: The original RLD60P090XF is RoHS non-compliant. All three substitute parts (60R090XPR, 60R090XU, and MF-R090) are ROHS3 compliant, making them suitable for applications with RoHS requirements.

Q: Do the physical dimension variations affect PCB compatibility?

A: No. All parts maintain the same lead spacing of 0.201" (5.10mm) and through-hole radial disc mounting configuration. Minor variations in diameter and height are within acceptable tolerances for standard PCB footprints designed for this component class.

Q: Which substitute should be selected for new production?

A: For Littelfuse preference, either 60R090XPR or 60R090XU provides active product status and ROHS3 compliance. For multi-source strategy, MF-R090 from Bourns offers equivalent performance with active product status and identical certifications.