Littelfuse 60R065XPR Polymeric PTC Resettable Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 60R065XPR is an active polymeric PTC resettable fuse rated for 60V maximum voltage with 650 mA hold current. This through-hole radial disc component provides overcurrent protection in electronic circuits and automatically resets after fault conditions are cleared. Substitute parts are identified to address inventory availability, alternative sourcing requirements, or specific application constraints while maintaining electrical and mechanical compatibility within defined parameters.

Key Parameters

Parameter	Value
Voltage - Max	60V
Current - Hold (Ih) (Max)	650 mA
Current - Trip (It)	1.3 A
Current - Max	40 A
Time to Trip	5.3 s
Resistance - Initial (Ri) (Min)	310 mOhms
Resistance - Post Trip (R1) (Max)	720 mOhms
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Radial, Disc
Lead Spacing	0.201" (5.10mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 60R065XPR are classified based on the following electrical and mechanical parameters that determine functional equivalence:

Primary Substitution Criteria:

Voltage rating equal to or greater than 60V
Current hold (Ih) rating of 650 mA
Current trip (It) rating of 1.3 A
Through-hole radial disc mounting configuration
Lead spacing of 0.201" (5.10mm)
Operating temperature range of -40°C ~ 85°C
ROHS3 compliance

Substitute Categories:

Direct Electrical Equivalents (Same Voltage): Parts maintaining 60V maximum voltage with identical current ratings and electrical characteristics.

Parametric Equivalents (Higher Voltage Rating): Parts with 72V maximum voltage rating, which operate within the 60V application envelope while providing additional voltage margin. These maintain identical current hold, trip, and time-to-trip specifications.

Alternative Manufacturer Equivalents: Parts from different manufacturers (Bourns, SCHURTER) meeting identical electrical specifications and mechanical form factors, with minor dimensional variations within acceptable tolerances.

Current Rating Variants: Parts with different hold current ratings (750 mA) that operate in the same voltage class but are suitable only for applications requiring higher current protection thresholds.

Parameter Comparison

Part Number	Manufacturer	Voltage - Max	Current - Hold (Ih) (Max)	Current - Trip (It)	Time to Trip	Resistance - Initial (Ri) (Min)	Resistance - Post Trip (R1) (Max)	Lead Spacing	RoHS Status	Product Status
60R065XPR	Littelfuse Inc.	60V	650 mA	1.3 A	5.3 s	310 mOhms	720 mOhms	0.201" (5.10mm)	ROHS3 Compliant	Active
RXEF065-AP	Littelfuse	72V	650 mA	1.3 A	5.3 s	310 mOhms	720 mOhms	0.199" (5.05mm)	ROHS3 Compliant	Active
72R065XPR	Littelfuse Inc.	72V	650 mA	1.3 A	5.3 s	310 mOhms	720 mOhms	0.201" (5.10mm)	ROHS3 Compliant	Active
MF-R065	Bourns Inc.	60V	650 mA	1.3 A	5.3 s	270 mOhms	720 mOhms	0.201" (5.10mm)	ROHS3 Compliant	Active
PFRA.065	SCHURTER Inc.	60V	650 mA	1.3 A	5.3 s	270 mOhms	720 mOhms	0.201" (5.10mm)	ROHS3 Compliant	Active
PFRA.075	SCHURTER Inc.	60V	750 mA	1.5 A	6.3 s	180 mOhms	600 mOhms	0.201" (5.10mm)	ROHS3 Compliant	Active

Engineering Selection Recommendations

Direct Substitution (Identical Electrical Performance):

MF-R065 (Bourns) and PFRA.065 (SCHURTER) are direct electrical equivalents to the 60R065XPR, maintaining 60V voltage rating and 650 mA hold current specifications. Both are ROHS3 compliant and active products. MF-R065 offers higher inventory availability (31,243 units) compared to PFRA.065 (1,899 units). Both parts are suitable for applications requiring no voltage margin increase.

Parametric Equivalents (Higher Voltage Rating):

72R065XPR (Littelfuse) and RXEF065-AP (Littelfuse) provide 72V maximum voltage rating while maintaining identical 650 mA hold current and 1.3 A trip current specifications. These parts operate within the 60V application envelope and are appropriate for designs requiring additional voltage safety margin. Both are ROHS3 compliant and active products. 72R065XPR maintains identical lead spacing (0.201") to the main part; RXEF065-AP has minimal lead spacing variation (0.199").

Current Rating Variant:

PFRA.075 (SCHURTER) operates at 750 mA hold current with 1.5 A trip current, representing a higher current protection threshold. This part is suitable only for applications designed to accommodate the increased current rating and longer trip time (6.3 s versus 5.3 s). Selection requires confirmation that the application circuit can tolerate these parameter differences.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and active product status. Littelfuse parts carry cURus and TUV approvals; RXEF065-AP adds CSA and UL certifications. SCHURTER parts carry cURus and TUV approvals. Selection based on required certification standards for the target application.

Frequently Asked Questions (FAQ)

Q: Can RXEF065-AP or 72R065XPR be used as direct replacements for 60R065XPR?

A: Yes. Both parts maintain identical electrical specifications (650 mA hold current, 1.3 A trip current, 5.3 s trip time) and operate within the 60V application envelope. The 72V voltage rating provides additional margin and does not create incompatibility in 60V circuits. Lead spacing differences are minimal (0.199" to 0.201") and do not affect PCB compatibility for standard through-hole mounting.

Q: What is the difference between MF-R065 and PFRA.065 compared to 60R065XPR?

A: MF-R065 (Bourns) and PFRA.065 (SCHURTER) are electrically identical to 60R065XPR, maintaining 60V voltage rating and 650 mA hold current. The primary differences are manufacturer and initial resistance specification (270 mOhms versus 310 mOhms minimum). Both are ROHS3 compliant and suitable for direct substitution. MF-R065 offers significantly higher inventory availability.

Q: When should PFRA.075 be selected instead of other substitutes?

A: PFRA.075 is appropriate only for applications requiring 750 mA hold current protection with 1.5 A trip current. This part operates at a higher current threshold than the 60R065XPR and includes longer trip time (6.3 s versus 5.3 s). Selection requires confirmation that the application circuit design accommodates these increased current and timing specifications.

Q: Are there packaging differences between substitute parts?

A: 60R065XPR, 72R065XPR, MF-R065, and PFRA.065 are supplied in Cut Tape (CT) or Bulk packaging. PFRA.075 is supplied in Bulk packaging. All parts maintain through-hole radial disc form factor with 0.201" lead spacing (RXEF065-AP: 0.199"). Packaging selection depends on assembly process requirements and volume needs.

Q: What certifications apply to each substitute part?

A: 60R065XPR and 72R065XPR carry cURus and TUV approvals. RXEF065-AP carries CQC, CSA, TUV, and UL approvals. MF-R065 and PFRA.065 carry cURus and TUV approvals. PFRA.075 carries cURus and TUV approvals. Selection based on required certification standards for the target application and regulatory jurisdiction.

Q: Can 60R065XPR be used in applications designed for 72V circuits?

A: No. The 60R065XPR is rated for 60V maximum voltage and should not be used in circuits exceeding this rating. For 72V applications, use 72R065XPR or RXEF065-AP, which are rated for 72V operation.

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