MF-R075-2-99 Equivalent & Substitute Parts

Part Overview

The MF-R075-2-99 is a Polymeric PTC Resettable Fuse manufactured by Bourns Inc., rated for 60V maximum voltage with 750 mA hold current. This component is classified as Obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement. The part is designed for through-hole radial mounting in applications requiring overcurrent protection with automatic reset capability.

Key Parameters

Parameter	Value
Manufacturer	Bourns Inc.
Series	Multifuse®, MF-R
Type	Polymeric
Voltage - Max	60V
Current - Hold (Ih)	750 mA
Current - Trip (It)	1.5 A
Resistance - Initial (Ri)	180 mOhms (Min)
Resistance - Post Trip (R1)	600 mOhms (Max)
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Radial, Disc
Size / Dimension	0.409" Dia x 0.122" T (10.40mm x 3.10mm)
Lead Spacing	0.201" (5.10mm)
RoHS Status	ROHS3 Compliant
Approval Agency	cURus, TUV

Substitute Part Grouping Explanation

Substitution of the MF-R075-2-99 is determined by strict equivalence across the following critical parameters:

Parametric Equivalence Criteria:

Voltage - Max: 60V
Current - Hold (Ih): 750 mA
Current - Trip (It): 1.5 A
Resistance - Initial (Ri): 180 mOhms (Min)
Resistance - Post Trip (R1): 600 mOhms (Max)
Operating Temperature: -40°C ~ 85°C
Mounting Type: Through Hole
Package / Case: Radial, Disc
Lead Spacing: 0.201" (5.10mm)

Parts are classified into two categories:

Parametric Equivalents maintain all critical electrical and mechanical parameters, differing only in packaging format (Tape & Reel vs. Cut Tape) or product status (Active vs. Obsolete). These parts are direct functional replacements.

Similar Parts share the same voltage, current hold, and trip specifications but may differ in physical dimensions, initial resistance, or manufacturer. These require verification of mechanical fit and circuit performance.

Parameter Comparison

Part Number	Manufacturer	Voltage (Max)	Ih (mA)	It (A)	Ri (mOhms)	R1 (mOhms)	Temp Range	Packaging	Status
MF-R075-2-99	Bourns Inc.	60V	750	1.5	180	600	-40°C ~ 85°C	Tape & Reel	Obsolete
MF-R075-2	Bourns Inc.	60V	750	1.5	180	600	-40°C ~ 85°C	Cut Tape	Active
MF-R075-2-14	Bourns Inc.	60V	750	1.5	180	600	-40°C ~ 85°C	Not Specified	Active
MF-R075-2-17	Bourns Inc.	60V	750	1.5	180	600	-40°C ~ 85°C	Tape & Reel	Active
MF-R075-AP	Bourns Inc.	60V	750	1.5	180	600	-40°C ~ 85°C	Cut Tape	Active
MF-RX075/72-2-17	Bourns Inc.	72V	750	1.5	180	600	-40°C ~ 85°C	Tape & Reel	Active
60R075XU	Littelfuse Inc.	60V	750	1.5	250	600	-40°C ~ 85°C	Bulk	Active
RXEF017-AP	Littelfuse	60V	170	0.34	3300	8000	-40°C ~ 85°C	Cut Tape	Active
PFRA.075.2	SCHURTER Inc.	60V	750	1.5	180	600	-40°C ~ 85°C	Cut Tape	Active

Engineering Selection Recommendations

Primary Substitutes (Parametric Equivalents):

MF-R075-2, MF-R075-2-14, MF-R075-2-17, and MF-R075-AP are direct parametric equivalents manufactured by Bourns Inc. All maintain identical electrical specifications and are rated for the same voltage, current hold, and trip parameters. These parts carry Active product status and are recommended as primary replacements. MF-R075-2-17 includes AEC-Q200 automotive qualification and expanded approval agencies (cUL, cURus, TUV, UL), providing enhanced compliance for applications requiring automotive-grade reliability.

Secondary Substitutes (Similar Parts):

PFRA.075.2 manufactured by SCHURTER Inc. is a parametric equivalent with identical electrical characteristics and mechanical dimensions. This part is suitable for direct substitution where manufacturer flexibility is acceptable.

60R075XU manufactured by Littelfuse Inc. maintains the same voltage and current specifications but differs in initial resistance (250 mOhms vs. 180 mOhms minimum). This part is functionally compatible but introduces slightly higher circuit resistance. Verification of circuit performance is necessary before deployment.

Voltage-Rated Alternative:

MF-RX075/72-2-17 is rated for 72V maximum voltage while maintaining identical current and resistance specifications. This part is suitable only for applications where the higher voltage rating is required or beneficial. It is not a direct replacement for 60V-rated circuits.

Not Recommended:

RXEF017-AP is not suitable as a substitute. This part operates at 170 mA hold current and 340 mA trip current, which differs significantly from the 750 mA / 1.5 A specifications of the MF-R075-2-99. The resistance characteristics are also substantially different (3.3 Ohms initial vs. 180 mOhms).

Frequently Asked Questions (FAQ)

Q: Can MF-R075-2-17 replace MF-R075-2-99 directly?

A: Yes. MF-R075-2-17 is a parametric equivalent with identical voltage, current hold, current trip, and resistance specifications. The primary difference is packaging format (Tape & Reel) and product status (Active vs. Obsolete). MF-R075-2-17 includes AEC-Q200 qualification, making it suitable for automotive applications.

Q: What is the difference between MF-R075-2 and MF-R075-AP?

A: Both parts are parametric equivalents with identical electrical specifications. The difference is packaging format: MF-R075-2 is supplied in Cut Tape, while MF-R075-AP is also supplied in Cut Tape. Both are Active status parts manufactured by Bourns Inc.

Q: Can 60R075XU from Littelfuse be used instead of MF-R075-2-99?

A: 60R075XU is functionally compatible for most applications. It maintains the same voltage (60V) and current specifications (750 mA hold, 1.5 A trip). However, the initial resistance is 250 mOhms (minimum) compared to 180 mOhms for the MF-R075-2-99. Circuit performance should be verified before deployment in sensitive applications.

Q: Why is MF-RX075/72-2-17 listed as a substitute if it has 72V rating?

A: MF-RX075/72-2-17 is listed as a parametric equivalent because it maintains identical current and resistance specifications. The 72V rating is a higher voltage specification suitable for applications requiring increased voltage margin. This part is not a direct replacement for 60V circuits but may be used in designs where higher voltage rating is acceptable or required.

Q: What does "Parametric Equivalent" mean?

A: A parametric equivalent maintains all critical electrical specifications: voltage rating, current hold, current trip, initial resistance, and post-trip resistance. These parts are functionally interchangeable in circuit applications.

Q: Are there any compliance differences between substitute parts?

A: MF-R075-2-17 includes AEC-Q200 automotive qualification and expanded approval agencies (cUL, cURus, TUV, UL). Other Bourns equivalents carry cURus and TUV approval. PFRA.075.2 and 60R075XU also carry cURus and TUV approval. All listed parts are ROHS3 compliant and REACH unaffected.

Q: Can packaging format affect circuit performance?

A: Packaging format (Tape & Reel, Cut Tape, or Bulk) does not affect electrical performance. The choice depends on procurement and assembly requirements. Tape & Reel packaging is standard for automated assembly, while Cut Tape and Bulk formats are used for manual assembly or specific procurement workflows.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message