Equivalent & Substitute Parts for MF-R065-0-99

Part Overview

The MF-R065-0-99 is a Polymeric PTC Resettable Fuse manufactured by Bourns Inc. in the Multifuse® MF-R series. This component is rated for 60V maximum voltage with a 650 mA hold current and is designed for through-hole radial mounting in disc configuration. The part is currently listed as obsolete, making identification of equivalent and substitute components essential for ongoing system support and procurement.

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 Range	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Radial, Disc
Size / Dimension	0.382" Dia x 0.122" T (9.70mm x 3.10mm)
Lead Spacing	0.201" (5.10mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the MF-R065-0-99 is determined by the following critical parameters:

Voltage - Max: 60V or higher
Current - Hold (Ih) (Max): 650 mA
Current - Trip (It): 1.3 A
Resistance - Initial (Ri) (Min): 270 mOhms
Resistance - Post Trip (R1) (Max): 720 mOhms
Operating Temperature Range: -40°C ~ 85°C
Mounting Type: Through Hole
Package / Case: Radial, Disc
Lead Spacing: 0.201" (5.10mm)

Parts are grouped into three categories based on these parameters:

Category 1: Direct Bourns Inc. Equivalents (60V Rating) Parts MF-R065, MF-R065-0-17, and PFRA.065 maintain the exact 60V voltage specification with identical electrical characteristics and mechanical dimensions.

Category 2: Bourns Inc. Higher Voltage Variants (72V Rating) Parts MF-RX065/72-0 and MF-RX065/72-0-17 provide 72V maximum voltage rating while maintaining all other electrical and mechanical parameters. These are suitable for applications where higher voltage headroom is acceptable.

Category 3: Alternative Manufacturer (Littelfuse Inc.) Part RXEF065 from Littelfuse Inc. meets the 72V voltage requirement with equivalent electrical performance. Minor dimensional variations exist within acceptable mechanical tolerances.

Parameter Comparison

Parameter	MF-R065-0-99	MF-R065	MF-R065-0-17	MF-RX065/72-0	MF-RX065/72-0-17	RXEF065	PFRA.065
Manufacturer	Bourns Inc.	Bourns Inc.	Bourns Inc.	Bourns Inc.	Bourns Inc.	Littelfuse Inc.	SCHURTER Inc.
Voltage - Max	60V	60V	60V	72V	72V	72V	60V
Current - Hold (Ih) (Max)	650 mA	650 mA	650 mA	650 mA	650 mA	650 mA	650 mA
Current - Trip (It)	1.3 A	1.3 A	1.3 A	1.3 A	1.3 A	1.3 A	1.3 A
Current - Max	40 A	40 A	40 A	40 A	40 A	40 A	40 A
Time to Trip	5.3 s	5.3 s	5.3 s	5.3 s	5.3 s	5.3 s	5.3 s
Resistance - Initial (Ri) (Min)	270 mOhms	270 mOhms	270 mOhms	270 mOhms	270 mOhms	310 mOhms	270 mOhms
Resistance - Post Trip (R1) (Max)	720 mOhms	720 mOhms	720 mOhms	720 mOhms	720 mOhms	720 mOhms	720 mOhms
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc
Size / Dimension	0.382" Dia x 0.122" T (9.70mm x 3.10mm)	0.382" Dia x 0.122" T (9.70mm x 3.10mm)	0.382" Dia x 0.122" T (9.70mm x 3.10mm)	0.382" Dia x 0.122" T (9.70mm x 3.10mm)	0.382" Dia x 0.122" T (9.70mm x 3.10mm)	0.370" Dia x 0.118" T (9.40mm x 3.00mm)	0.382" Dia x 0.122" T (9.70mm x 3.10mm)
Lead Spacing	0.201" (5.10mm)	0.201" (5.10mm)	0.201" (5.10mm)	0.201" (5.10mm)	0.201" (5.10mm)	0.199" (5.05mm)	0.201" (5.10mm)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Approval Agency	cURus, TUV	cURus, TUV	cUL, cURus, TUV, UL	cURus, TUV	cUL, cURus, TUV, UL	CQC, CSA, TUV, UL	cURus, TUV
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Identical 60V Specification)

MF-R065 and MF-R065-0-17 are the preferred direct substitutes for MF-R065-0-99. Both are active products from Bourns Inc. with identical electrical and mechanical specifications. MF-R065-0-17 carries additional certifications (cUL, UL) and AEC-Q200 automotive qualification, making it suitable for applications requiring higher compliance standards.

PFRA.065 from SCHURTER Inc. provides equivalent electrical performance at 60V with matching mechanical dimensions and lead spacing. This part is suitable for applications where multi-source procurement is required.

Secondary Substitutes (Higher Voltage Rating)

MF-RX065/72-0 and MF-RX065/72-0-17 are suitable for applications where the circuit voltage does not exceed 72V. These parts provide additional voltage margin while maintaining all other electrical characteristics. MF-RX065/72-0-17 includes AEC-Q200 qualification and expanded certifications (cUL, UL).

Alternative Manufacturer Option

RXEF065 from Littelfuse Inc. meets the electrical requirements with 72V rating. Dimensional variations are minor (0.370" Dia vs. 0.382" Dia; 0.118" T vs. 0.122" T) and remain within acceptable mechanical tolerances for standard through-hole PCB mounting. Lead spacing tolerance (0.199" vs. 0.201") is negligible for typical 0.1" grid spacing. This part carries CSA and CQC certifications in addition to TUV and UL.

Frequently Asked Questions (FAQ)

Q: Can MF-R065-0-17 be used as a direct replacement for MF-R065-0-99?

A: Yes. MF-R065-0-17 is electrically and mechanically identical to MF-R065-0-99 with matching voltage (60V), hold current (650 mA), trip current (1.3 A), and physical dimensions. MF-R065-0-17 is an active product with expanded certifications.

Q: What is the difference between the 60V and 72V variants?

A: The 72V variants (MF-RX065/72-0 and MF-RX065/72-0-17) have a higher maximum voltage rating. All other electrical parameters—hold current, trip current, resistance values, and time to trip—remain identical. Use 72V variants only if your circuit voltage exceeds 60V but does not exceed 72V.

Q: Are there dimensional differences between substitute parts?

A: Most substitutes maintain the standard 0.382" diameter and 0.122" thickness. RXEF065 has slightly smaller dimensions (0.370" Dia x 0.118" T) and lead spacing (0.199" vs. 0.201"), but these variations are within acceptable tolerances for through-hole PCB mounting on standard 0.1" grid spacing.

Q: Which substitute has the best compliance certifications?

A: MF-R065-0-17 and MF-RX065/72-0-17 carry the most comprehensive certifications (cUL, cURus, TUV, UL) and include AEC-Q200 automotive qualification. RXEF065 includes CSA and CQC certifications in addition to TUV and UL.

Q: Can I use RXEF065 from Littelfuse as a substitute?

A: Yes. RXEF065 meets all electrical requirements with 72V rating and equivalent hold/trip current specifications. Minor dimensional variations are acceptable for standard through-hole mounting. Verify that your PCB layout accommodates the slightly smaller disc diameter if space is constrained.

Q: What is the initial resistance difference in RXEF065?

A: RXEF065 has a minimum initial resistance (Ri) of 310 mOhms compared to 270 mOhms for other substitutes. This 40 mOhm difference is within the post-trip resistance specification (720 mOhms max) and does not affect functional performance in typical circuit applications.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and REACH unaffected, matching the environmental compliance status of MF-R065-0-99.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message