Equivalent & Substitute Parts for RLD60P020XF

Part Overview

The RLD60P020XF is a polymeric PTC resettable fuse manufactured by Littelfuse, rated for 60V maximum voltage with 200 mA hold current. This component is classified as obsolete, which necessitates identification of active substitute parts that maintain electrical and mechanical compatibility. The RLD60P020XF belongs to the POLY-FUSE® RLD60 series and is designed for through-hole radial mounting in disc configuration.

Substiute Parts

RLD60P020XF

LittelfuseIn Stock: 701RLD60P020XF Datasheet

Current PartRFQ

60R020XPR

Littelfuse Inc.In Stock: 330360R020XPR Datasheet

DirectRFQ

72R020XPR

LittelfuseIn Stock: 270972R020XPR Datasheet

DirectRFQ

RXEF020-AP

LittelfuseIn Stock: 2042RXEF020-AP Datasheet

DirectRFQ

60R020XU

Littelfuse Inc.In Stock: 309260R020XU Datasheet

MFR RecommendedRFQ

MF-R020

Bourns Inc.In Stock: 10481MF-R020 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RLD60P020XF is determined by the following critical parameters:

Electrical Parameters (Must Match):

• Voltage - Max: 60V (or higher)
• Current - Hold (Ih) (Max): 200 mA
• Current - Trip (It): 400 mA
• Resistance - Initial (Ri) (Min): 1.83 Ohms (or lower)
• Resistance - Post Trip (R1) (Max): 4.4 Ohms
• Time to Trip: 2.2 s
• Operating Temperature: -40°C ~ 85°C

Mechanical Parameters (Must Match):

• Mounting Type: Through Hole
• Package / Case: Radial, Disc
• Size / Dimension: 0.291" Dia x 0.122" T (7.40mm x 3.10mm)
• Lead Spacing: 0.201" (5.10mm)

The following parts meet these substitution criteria:

1. 60R020XPR (Littelfuse) – Direct electrical and mechanical equivalent with improved RoHS3 compliance
2. 60R020XU (Littelfuse) – Manufacturer-recommended equivalent, bulk packaging option
3. MF-R020 (Bourns) – Cross-manufacturer equivalent with identical electrical specifications
4. 72R020XPR (Littelfuse) – Higher voltage rating (72V) with identical hold current and mechanical form factor
5. RXEF020-AP (Littelfuse) – PolySwitch® series equivalent with 72V rating and enhanced certifications

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (60V Rating):

60R020XPR and 60R020XU are direct Littelfuse equivalents maintaining the original 60V maximum voltage specification. Both parts are active products with ROHS3 compliance and identical electrical characteristics. 60R020XPR is supplied in cut tape packaging, while 60R020XU is available in bulk. Selection between these two depends on procurement and assembly requirements.

MF-R020 (Bourns Multifuse® series) provides cross-manufacturer equivalence with identical electrical performance. Initial resistance is lower at 1.5 Ohms minimum, which may result in reduced voltage drop during normal operation. This part is ROHS3 compliant and widely available.

Higher Voltage Alternatives (72V Rating):

72R020XPR and RXEF020-AP both provide 72V maximum voltage rating while maintaining 200 mA hold current and identical trip characteristics. These parts are suitable for applications where the original 60V specification can accommodate higher voltage margins. 72R020XPR is the POLY-FUSE® series equivalent, while RXEF020-AP is the PolySwitch® series equivalent with expanded certification coverage (CQC, CSA, TUV, UL).

All substitute parts are active products with current manufacturing status and ROHS3 compliance, eliminating obsolescence risk associated with the RLD60P020XF.

Frequently Asked Questions (FAQ)

Q: Can 60R020XPR directly replace RLD60P020XF in existing designs?

A: Yes. 60R020XPR maintains identical electrical specifications (60V, 200 mA hold current, 400 mA trip current, 2.2 s trip time) and mechanical form factor (0.291" diameter, 0.122" thickness, 0.201" lead spacing). The primary difference is improved RoHS3 compliance and active product status.

Q: What is the difference between 60R020XU and 60R020XPR?

A: Both parts are electrically and mechanically identical. The difference is packaging: 60R020XPR is supplied in cut tape (CT) for automated assembly, while 60R020XU is supplied in bulk for manual assembly or alternative handling methods.

Q: Can MF-R020 (Bourns) be used instead of Littelfuse parts?

A: Yes. MF-R020 meets all electrical and mechanical substitution criteria with identical hold current, trip current, and operating temperature range. Initial resistance is 1.5 Ohms minimum (compared to 1.83 Ohms for Littelfuse parts), resulting in lower voltage drop. All other parameters match the RLD60P020XF specification.

Q: When should 72R020XPR or RXEF020-AP be selected over 60V-rated parts?

A: These 72V-rated alternatives are appropriate when circuit design permits higher voltage margins or when system voltage may exceed 60V. Electrical performance (hold current, trip current, trip time) remains identical to 60V-rated parts. Selection depends on circuit requirements and voltage headroom availability.

Q: Are there mechanical compatibility concerns with RXEF020-AP?

A: RXEF020-AP has slightly different dimensions: thickness is 0.118" (3.00mm) compared to 0.122" (3.10mm) for the RLD60P020XF, and lead spacing is 0.199" (5.05mm) compared to 0.201" (5.10mm). These minor variations are within typical PCB tolerance ranges for through-hole radial components but should be verified against specific board layout requirements.

Q: What compliance advantages do the substitute parts offer?

A: All substitute parts are ROHS3 compliant, eliminating the RoHS non-compliance status of the obsolete RLD60P020XF. RXEF020-AP provides the broadest certification coverage (CQC, CSA, TUV, UL) compared to other substitutes (cURus, TUV). Selection should align with regional regulatory requirements and end-product certification needs.