RLD60P017XFF Equivalent & Substitute Parts

Part Overview

The RLD60P017XFF is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., part of the POLY-FUSE® RLD60 series. This component is rated for 60V maximum voltage with a 170 mA hold current and is designed for through-hole radial mounting in disc configuration. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring this electrical specification.

Key Parameters

Parameter	Value
Voltage - Max	60V
Current - Hold (Ih) (Max)	170 mA
Current - Trip (It)	340 mA
Current - Max	40 A
Time to Trip	3 s
Resistance - Initial (Ri) (Min)	3.3 Ohms
Resistance - Post Trip (R1) (Max)	8 Ohms
Operating Temperature	-40°C ~ 85°C
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)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the RLD60P017XFF is determined by strict electrical and mechanical compatibility across the following parameters:

Primary Substitution Criteria:

Voltage rating: 60V maximum
Current hold (Ih): 170 mA
Current trip (It): 340 mA
Time to trip: 3 seconds
Mounting type: Through hole radial disc
Physical dimensions: 0.291" diameter x 0.122" thickness
Lead spacing: 0.201" (5.10mm)

Secondary Compatibility Factors:

Resistance characteristics (initial and post-trip)
Operating temperature range: -40°C to 85°C
RoHS3 compliance
Approval agencies: cURus, TUV, CSA, UL, CQC

Parts are grouped into two categories: direct equivalents matching all electrical and mechanical parameters, and parametric equivalents that maintain the same functional performance within the specified tolerance ranges.

Parameter Comparison

Part Number	Manufacturer	Series	Voltage (Max)	Ih (mA)	It (mA)	Time to Trip (s)	Ri (Min) Ohms	R1 (Max) Ohms	Dimensions	Status	Packaging
RLD60P017XFF	Littelfuse Inc.	POLY-FUSE® RLD60	60V	170	340	3	3.3	8	0.291" x 0.122"	Obsolete	-
RXEF017-AP	Littelfuse	PolySwitch® RXEF	60V	170	340	3	3.3	8	0.291" x 0.118"	Active	Cut Tape (CT)
60R017XPR	Littelfuse Inc.	POLY-FUSE® 60R	60V	170	340	3	3.3	8	0.291" x 0.122"	Active	Cut Tape (CT)
PFRA.017	SCHURTER Inc.	PFRA	60V	170	340	3	2	8	0.291" x 0.122"	Active	Bulk
PFRA.017.2	SCHURTER Inc.	PFRA	60V	170	340	3	2	8	0.291" x 0.122"	Active	Cut Tape (CT)

Engineering Selection Recommendations

Direct Equivalents (Recommended Primary Substitutes):

The 60R017XPR from Littelfuse Inc. is the primary direct equivalent. It maintains identical electrical specifications (60V, 170 mA hold current, 340 mA trip current, 3-second trip time) and mechanical dimensions (0.291" x 0.122", 0.201" lead spacing). The part is active in production, ROHS3 compliant, and carries cURus approval. This part provides the most direct replacement path for the obsolete RLD60P017XFF.

The RXEF017-AP from Littelfuse is an active alternative with matching electrical performance. Minor dimensional variation exists in thickness (0.118" vs. 0.122"), which remains within typical PCB assembly tolerances for radial disc components. This part carries expanded certifications (CQC, CSA, TUV, UL) and is available in cut tape packaging.

Secondary Equivalents (Parametric Matches):

The PFRA.017 and PFRA.017.2 from SCHURTER Inc. provide parametric equivalence with identical voltage, current hold, trip current, and trip time specifications. These parts maintain the same physical form factor and lead spacing. The primary difference is initial resistance (2 Ohms minimum vs. 3.3 Ohms), which remains within acceptable post-trip resistance limits (8 Ohms maximum). Both parts are active, ROHS3 compliant, and carry cURus and TUV approvals. PFRA.017.2 is available in cut tape packaging, while PFRA.017 is supplied in bulk.

Compliance and Certification:

All recommended substitutes maintain ROHS3 compliance and operate within the -40°C to 85°C temperature range. Selection should prioritize parts with active production status and certifications matching the original application requirements.

Frequently Asked Questions (FAQ)

Q: Can RXEF017-AP be used as a direct replacement for RLD60P017XFF?

A: Yes. The RXEF017-AP matches all critical electrical parameters (60V, 170 mA hold, 340 mA trip, 3-second trip time) and maintains compatible mechanical dimensions. The thickness variation (0.118" vs. 0.122") is within standard PCB assembly tolerances for radial components.

Q: What is the difference between 60R017XPR and PFRA.017?

A: Both parts meet the electrical specification (60V, 170 mA hold current, 340 mA trip current). The 60R017XPR has a minimum initial resistance of 3.3 Ohms, while PFRA.017 specifies 2 Ohms minimum. Both maintain the same maximum post-trip resistance (8 Ohms). The 60R017XPR is from Littelfuse; PFRA.017 is from SCHURTER.

Q: Does packaging type affect electrical performance?

A: No. Cut tape (CT) and bulk packaging contain identical components. Packaging selection depends on assembly process requirements and inventory management. PFRA.017.2 and RXEF017-AP are available in cut tape; PFRA.017 is supplied in bulk.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All recommended substitutes carry ROHS3 compliance certification, matching the original RLD60P017XFF specification.

Q: What certifications should I verify for my application?

A: The RLD60P017XFF carries cURus approval. The 60R017XPR maintains cURus approval. The RXEF017-AP provides expanded certifications (CQC, CSA, TUV, UL). The PFRA series (PFRA.017, PFRA.017.2) carries cURus and TUV approvals. Select the part whose certifications match your application requirements.

Q: Can I use PFRA.010 or PFRA.020 as substitutes?

A: No. These parts have different current ratings (100 mA and 200 mA hold current respectively) and do not meet the 170 mA specification of the RLD60P017XFF. Current rating is a critical selection parameter and cannot be substituted.

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