Equivalent & Substitute Parts for MF-R065

Part Overview

The Bourns MF-R065 is a polymeric PTC resettable fuse rated for 60V maximum voltage with 650 mA hold current. This through-hole radial disc component is designed for circuit protection applications requiring automatic reset capability after fault conditions clear. The part is active in production with full RoHS3 compliance and cURus/TUV approval. Substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and thermal performance within the specified operating range of -40°C to 85°C.

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)	270 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
Approval Agency	cURus, TUV

Substitute Part Grouping Explanation

Substitute parts for the MF-R065 are classified based on electrical parameter matching within allowable tolerances. The critical substitution parameters are:

Voltage - Max: 60V (primary rating)
Current - Hold (Ih) (Max): 650 mA (protection threshold)
Current - Trip (It): 1.3 A (trip point)
Time to Trip: 5.3 s (response time)
Resistance - Initial (Ri) (Min): 270 mOhms (circuit impact)
Resistance - Post Trip (R1) (Max): 720 mOhms (fault state)
Mounting Type: Through Hole
Package / Case: Radial, Disc
Lead Spacing: 0.201" (5.10mm)

Parts are grouped into two categories:

Direct Equivalents (identical voltage and current ratings): 60R065XU, 60R065XPR, PFRA.065

Parametric Equivalents (higher voltage rating with identical current characteristics): MF-RX065/72-0, 0ZRC0065FF1E

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)	Operating Temperature	Lead Spacing	RoHS Status	Approval Agency
MF-R065	Bourns Inc.	60V	650 mA	1.3 A	5.3 s	270 mOhms	720 mOhms	-40°C ~ 85°C	0.201" (5.10mm)	ROHS3 Compliant	cURus, TUV
60R065XU	Littelfuse Inc.	60V	650 mA	1.3 A	5.3 s	310 mOhms	720 mOhms	-40°C ~ 85°C	0.201" (5.10mm)	ROHS3 Compliant	cURus, TUV
60R065XPR	Littelfuse Inc.	60V	650 mA	1.3 A	5.3 s	310 mOhms	720 mOhms	-40°C ~ 85°C	0.201" (5.10mm)	ROHS3 Compliant	cURus, TUV
PFRA.065	SCHURTER Inc.	60V	650 mA	1.3 A	5.3 s	270 mOhms	720 mOhms	-40°C ~ 85°C	0.201" (5.10mm)	ROHS3 Compliant	cURus, TUV
MF-RX065/72-0	Bourns Inc.	72V	650 mA	1.3 A	5.3 s	270 mOhms	720 mOhms	-40°C ~ 85°C	0.201" (5.10mm)	ROHS3 Compliant	cURus, TUV
0ZRC0065FF1E	Bel Fuse Inc.	90V	650 mA	1.3 A	5.3 s	310 mOhms	720 mOhms	-40°C ~ 85°C	0.201" (5.10mm)	ROHS3 Compliant	cURus, TUV

Engineering Selection Recommendations

All listed substitute parts maintain active product status and full RoHS3 compliance with cURus and TUV approval certifications. Selection between direct equivalents (60R065XU, 60R065XPR, PFRA.065) and the main part MF-R065 is determined by availability, packaging format, and manufacturer preference, as electrical and mechanical parameters are identical.

Parametric equivalents MF-RX065/72-0 and 0ZRC0065FF1E provide higher voltage ratings (72V and 90V respectively) while maintaining identical current hold, trip point, and response time characteristics. These parts are suitable for applications where the circuit voltage exceeds 60V but does not exceed the substitute part rating. The higher voltage rating does not affect circuit protection performance in 60V applications.

Initial resistance values vary between 270 mOhms and 310 mOhms across the substitute group. This variation remains within acceptable tolerance for circuit protection applications and does not impact functional performance.

Frequently Asked Questions (FAQ)

Q: Can 60R065XU or 60R065XPR be used as direct replacements for MF-R065?

A: Yes. Both parts are direct electrical and mechanical equivalents with identical voltage (60V), current hold (650 mA), trip point (1.3 A), and response time (5.3 s) specifications. Differences in initial resistance (310 mOhms vs. 270 mOhms) fall within acceptable tolerance for circuit protection applications.

Q: What is the difference between direct equivalents and parametric equivalents?

A: Direct equivalents (60R065XU, 60R065XPR, PFRA.065) match the MF-R065 at 60V maximum voltage. Parametric equivalents (MF-RX065/72-0 at 72V, 0ZRC0065FF1E at 90V) provide higher voltage ratings while maintaining identical current and response characteristics. Parametric equivalents are suitable for circuits operating above 60V.

Q: Can MF-RX065/72-0 or 0ZRC0065FF1E be used in a 60V circuit?

A: Yes. Higher voltage-rated parts function correctly in lower voltage applications. The 72V and 90V rated parts will provide equivalent protection in 60V circuits with no performance degradation.

Q: Are there packaging differences between substitute parts?

A: Yes. MF-R065 and PFRA.065 are supplied in Bulk packaging. 60R065XU is supplied in Bulk. 60R065XPR is supplied in Cut Tape (CT). MF-RX065/72-0 is supplied in Bulk. 0ZRC0065FF1E is supplied in Box. Packaging format does not affect electrical or mechanical compatibility.

Q: Do all substitute parts have the same lead spacing?

A: Yes. All parts listed maintain 0.201" (5.10mm) lead spacing, ensuring mechanical compatibility with existing PCB layouts designed for the MF-R065.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts carry ROHS3 Compliant status with cURus and TUV approval certifications, meeting the same regulatory requirements as the MF-R065.

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