MF-R010-2-99 Equivalent & Substitute Parts

Part Overview

The MF-R010-2-99 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 100 mA hold current and 200 mA trip current, designed for through-hole radial mounting in disc configuration. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Active alternatives from multiple manufacturers provide identical electrical performance and mechanical compatibility.

Key Parameters

Parameter	Value
Voltage - Max	60V
Current - Hold (Ih) (Max)	100 mA
Current - Trip (It)	200 mA
Current - Max	40 A
Time to Trip	4 s
Resistance - Initial (Ri) (Min)	2.5 Ohms
Resistance - Post Trip (R1) (Max)	7.5 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 eligibility is determined by strict equivalence across the following critical parameters:

Voltage - Max: 60V
Current - Hold (Ih) (Max): 100 mA
Current - Trip (It): 200 mA
Resistance - Initial (Ri) (Min): 2.5 Ohms
Resistance - Post Trip (R1) (Max): 7.5 Ohms
Operating Temperature: -40°C ~ 85°C
Mounting Type: Through Hole
Package / Case: Radial, Disc
RoHS Status: ROHS3 Compliant

All identified substitutes meet these core electrical and mechanical requirements. Variations in packaging format (Cut Tape vs. Tape & Reel), minor dimensional tolerances in thickness and lead spacing, and differences in approval agency certifications do not affect functional equivalence. Parts are grouped by manufacturer and product status (Active vs. Obsolete).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Max	Current - Hold (Ih) (Max)	Current - Trip (It)	Resistance - Initial (Ri) (Min)	Resistance - Post Trip (R1) (Max)	Operating Temperature	Mounting Type	Package / Case	Product Status	Packaging
MF-R010-2-99	Bourns Inc.	60V	100 mA	200 mA	2.5 Ohms	7.5 Ohms	-40°C ~ 85°C	Through Hole	Radial, Disc	Obsolete	-
MF-R010-2	Bourns Inc.	60V	100 mA	200 mA	2.5 Ohms	7.5 Ohms	-40°C ~ 85°C	Through Hole	Radial, Disc	Active	Cut Tape (CT)
MF-R010-2-17	Bourns Inc.	60V	100 mA	200 mA	2.5 Ohms	7.5 Ohms	-40°C ~ 85°C	Through Hole	Radial, Disc	Active	Tape & Reel (TR)
MF-R010-AP	Bourns Inc.	60V	100 mA	200 mA	2.5 Ohms	7.5 Ohms	-40°C ~ 85°C	Through Hole	Radial, Disc	Active	Cut Tape (CT)
PTR060V0010-TR	Eaton - Electronics Division	60V	100 mA	200 mA	2.5 Ohms	7.5 Ohms	-40°C ~ 85°C	Through Hole	Radial, Disc	Active	Cut Tape (CT)
PTR060V0010-TR1	Eaton - Electronics Division	60V	100 mA	200 mA	2.5 Ohms	7.5 Ohms	-40°C ~ 85°C	Through Hole	Radial, Disc	Active	Tape & Reel (TR)
RXEF010-2	Littelfuse	60V	100 mA	200 mA	2.5 Ohms	7.5 Ohms	-40°C ~ 85°C	Through Hole	Radial, Disc	Active	Cut Tape (CT)
0ZRR0010FF2E	Bel Fuse Inc.	60V	100 mA	200 mA	2.5 Ohms	7.5 Ohms	-40°C ~ 85°C	Through Hole	Radial, Disc	Active	Tape & Reel (TR)
60R010XPR	Littelfuse Inc.	60V	100 mA	200 mA	2.5 Ohms	7.5 Ohms	-40°C ~ 85°C	Through Hole	Radial, Disc	Active	Cut Tape (CT)
PFRA.010.2	SCHURTER Inc.	60V	100 mA	200 mA	2.5 Ohms	7.5 Ohms	-40°C ~ 85°C	Through Hole	Radial, Disc	Active	Cut Tape (CT)

Engineering Selection Recommendations

All listed substitutes are functionally equivalent to MF-R010-2-99 and suitable for direct replacement in circuit designs. Selection should prioritize active product status parts to ensure long-term availability and supply chain stability.

Bourns Inc. alternatives (MF-R010-2, MF-R010-2-17, MF-R010-AP) provide the most direct substitution path with identical dimensional specifications and approval certifications (cURus, TUV). These parts are currently in active production with substantial inventory levels.

Littelfuse parts (RXEF010-2, 60R010XPR) offer equivalent electrical performance with broader approval agency coverage (CQC, CSA, TUV, UL for RXEF010-2). Minor dimensional variations in thickness and lead spacing remain within acceptable mechanical tolerances for through-hole radial mounting.

Eaton Electronics Division (PTR060V0010-TR, PTR060V0010-TR1) and Bel Fuse Inc. (0ZRR0010FF2E) alternatives provide additional sourcing options with active product status. SCHURTER Inc. (PFRA.010.2) represents a fourth-source alternative with identical core specifications.

All substitutes maintain ROHS3 compliance and operate across the full -40°C to 85°C temperature range. Packaging format selection (Cut Tape vs. Tape & Reel) depends on assembly process requirements and should not influence functional performance.

Frequently Asked Questions (FAQ)

Q: Can MF-R010-2-99 be replaced with MF-R010-2?

A: Yes. MF-R010-2 is a direct parametric equivalent with identical electrical specifications (60V, 100 mA hold current, 200 mA trip current, 2.5 Ohms initial resistance, 7.5 Ohms post-trip resistance). The primary difference is product status: MF-R010-2 is active while MF-R010-2-99 is obsolete. Packaging format differs (Cut Tape vs. unspecified), but this does not affect circuit performance.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) and Tape & Reel (TR) are packaging and delivery formats that do not affect component electrical or mechanical performance. Cut Tape is suitable for lower-volume applications and manual assembly, while Tape & Reel is optimized for high-volume automated pick-and-place assembly. Selection depends on production volume and assembly equipment capabilities.

Q: Are cross-manufacturer substitutes (Littelfuse, Eaton, Bel Fuse, SCHURTER) electrically equivalent?

A: Yes. All listed substitutes meet the core electrical parameters: 60V maximum voltage, 100 mA hold current, 200 mA trip current, 2.5 Ohms minimum initial resistance, and 7.5 Ohms maximum post-trip resistance. Minor variations in physical dimensions (thickness and lead spacing within 0.01" tolerance) and approval agency certifications do not affect functional equivalence in circuit applications.

Q: Does the MF-R010-2-17 AEC-Q200 rating affect substitution suitability?

A: AEC-Q200 is an automotive qualification standard. Parts with this rating meet additional reliability and testing requirements suitable for automotive applications. Parts without AEC-Q200 rating remain functionally equivalent for general industrial and consumer applications. Selection should align with application requirements.

Q: Can I use RXEF010-2 as a substitute in a design originally specified for MF-R010-2-99?

A: Yes. RXEF010-2 meets all core electrical and mechanical requirements. It features broader approval agency coverage (CQC, CSA, TUV, UL) compared to the original part. Minor dimensional differences in thickness (0.118" vs. 0.122") and lead spacing (0.199" vs. 0.201") are within acceptable mechanical tolerances for through-hole radial mounting.

Q: What inventory levels are available for each substitute?

A: Current inventory varies by part number. MF-R010-2 has 4,200 units, MF-R010-AP has 6,721 units, RXEF010-2 has 7,600 units, and 60R010XPR has 3,400 units in stock. Lower inventory levels exist for MF-R010-2-17 (887 units), PTR060V0010-TR1 (1,044 units), 0ZRR0010FF2E (712 units), and PFRA.010.2 (879 units). Inventory status should be confirmed at time of procurement.

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