Equivalent & Substitute Parts for MF-R017-2-99

Part Overview

The MF-R017-2-99 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 170 mA hold current and 340 mA trip current, designed for through-hole radial mounting in disc configuration. The part is currently listed as Obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Max	60V
Current - Hold (Ih) (Max)	170 mA
Current - Trip (It)	340 mA
Current - Max	40 A
Time to Trip	3 s
Resistance - Initial (Ri) (Min)	2 Ohms
Resistance - Post Trip (R1) (Max)	8 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

Substitute parts for the MF-R017-2-99 are qualified based on strict electrical and mechanical parameter matching:

Critical Matching Parameters:

Voltage - Max: 60V
Current - Hold (Ih) (Max): 170 mA
Current - Trip (It): 340 mA
Resistance - Initial (Ri) (Min): 2 Ohms
Resistance - Post Trip (R1) (Max): 8 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)

All identified substitutes meet these parameters identically. Variations exist only in manufacturer, product status, packaging format, and approval agency certifications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage (Max)	Ih (Max)	It	Ri (Min)	R1 (Max)	Operating Temp	Packaging	Approval Agency
MF-R017-2-99	Bourns Inc.	Obsolete	60V	170 mA	340 mA	2 Ohms	8 Ohms	-40°C ~ 85°C	-	cURus, TUV
MF-R017-2	Bourns Inc.	Active	60V	170 mA	340 mA	2 Ohms	8 Ohms	-40°C ~ 85°C	Cut Tape (CT)	cURus, TUV
MF-R017-2-17	Bourns Inc.	Active	60V	170 mA	340 mA	2 Ohms	8 Ohms	-40°C ~ 85°C	Tape & Reel (TR)	cUL, cURus, TUV, UL
MF-R017-AP	Bourns Inc.	Active	60V	170 mA	340 mA	2 Ohms	8 Ohms	-40°C ~ 85°C	Cut Tape (CT)	cURus, TUV
0ZRR0017FF2E	Bel Fuse Inc.	Active	60V	170 mA	340 mA	2 Ohms	8 Ohms	-40°C ~ 85°C	Tape & Reel (TR)	cURus, TUV, UL
PFRA.017.2	SCHURTER Inc.	Active	60V	170 mA	340 mA	2 Ohms	8 Ohms	-40°C ~ 85°C	Cut Tape (CT)	cURus, TUV

Engineering Selection Recommendations

Primary Recommendation: MF-R017-2-17

This Bourns Inc. part carries Active product status with the broadest approval agency coverage (cUL, cURus, TUV, UL) and includes AEC-Q200 automotive qualification. It is available in Tape & Reel packaging suitable for high-volume production environments.

Secondary Recommendations:

MF-R017-2 and MF-R017-AP are both Active Bourns parts with identical electrical specifications. MF-R017-2 is available in Cut Tape format with 2593 units in stock, while MF-R017-AP offers the highest inventory availability at 8333 units in Cut Tape format.

Cross-Manufacturer Alternative:

0ZRR0017FF2E (Bel Fuse Inc.) and PFRA.017.2 (SCHURTER Inc.) are functionally equivalent alternatives from established manufacturers. Both maintain Active product status and full electrical parameter compliance. The 0ZRR0017FF2E includes UL certification in addition to cURus and TUV approvals.

All substitutes are ROHS3 compliant and REACH unaffected, maintaining regulatory alignment with the original MF-R017-2-99.

Frequently Asked Questions (FAQ)

Q: Can MF-R017-2-99 be directly replaced with MF-R017-2?

A: Yes. Both parts are electrically and mechanically identical. The primary difference is product status (Obsolete vs. Active) and packaging format. MF-R017-2 is available in Cut Tape, making it suitable for direct substitution in new designs and procurement.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging is supplied in individual strips suitable for small-quantity orders and manual assembly. Tape & Reel packaging is wound on reels for automated pick-and-place equipment in high-volume manufacturing. Both contain identical components with identical electrical performance.

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

A: Yes. The 0ZRR0017FF2E and PFRA.017.2 meet all electrical and mechanical parameters identically to the MF-R017-2-99. They differ only in manufacturer, series designation, and approval agency certifications. Both are Active products with established supply chains.

Q: Does the MF-R017-2-17 AEC-Q200 rating affect compatibility?

A: No. AEC-Q200 is an automotive qualification standard that indicates additional testing and reliability validation. It does not change electrical or mechanical performance. The presence of this rating makes MF-R017-2-17 suitable for automotive applications where such certification is required.

Q: What certifications are critical for my application?

A: All substitutes carry cURus and TUV approvals. If UL certification is required, select MF-R017-2-17 or 0ZRR0017FF2E. If cUL certification is required, select MF-R017-2-17. Verify your application requirements against the Approval Agency column in the Parameter Comparison table.

Q: Can I mix manufacturers in the same design?

A: Yes. All substitutes are electrically and mechanically identical. However, for consistency in procurement and supply chain management, maintaining a single manufacturer per design is recommended.

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