Equivalent & Substitute Parts for MF-SM050-2-006

Part Overview

The MF-SM050-2-006 is a polymeric PTC resettable fuse manufactured by Bourns Inc., rated for 60V maximum voltage with 500 mA hold current. This component is classified as Active product status and is designed for surface mount applications in 2-SMD package configuration. Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical dimensions, and compliance certifications to ensure functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Voltage - Max	60V
Current - Hold (Ih) (Max)	500 mA
Current - Trip (It)	1 A
Current - Max	40 A
Time to Trip	4 s
Resistance - Initial (Ri) (Min)	350 mOhms
Resistance - Post Trip (R1) (Max)	1.4 Ohms
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	2-SMD
Size / Dimension	0.287" L x 0.214" W (7.31mm x 5.44mm)
Thickness (Max)	0.125" (3.18mm)
RoHS Status	ROHS3 Compliant
Approval Agency	cURus, TUV

Substitute Part Grouping Explanation

Substitution eligibility for the MF-SM050-2-006 is determined by the following critical parameters:

Voltage rating equal to or greater than 60V maximum
Current hold (Ih) rating of 500 mA maximum
Current trip (It) rating of 1 A
Resistance characteristics: Initial resistance minimum 350 mOhms, post-trip resistance maximum 1.4 Ohms
Operating temperature range of -40°C to 85°C
Surface mount 2-SMD package configuration
Physical dimensions compatible with 0.287" L x 0.214" W footprint
Compliance with AEC-Q200 ratings and cURus/TUV approvals
ROHS3 compliance status

Parts meeting these specifications are classified as parametric equivalents or direct manufacturer alternatives and are suitable for direct substitution in circuit applications.

Parameter Comparison

Parameter	MF-SM050-2-006 (Bourns)	MF-SM050-2 (Bourns)	MF-SM050/60-2 (Bourns)	PFSM.050.2 (SCHURTER)
Manufacturer	Bourns Inc.	Bourns Inc.	Bourns Inc.	SCHURTER Inc.
Voltage - Max	60V	60V	60V	60V
Current - Hold (Ih) (Max)	500 mA	500 mA	500 mA	500 mA
Current - Trip (It)	1 A	1 A	1 A	1 A
Current - Max	40 A	40 A	40 A	40 A
Time to Trip	4 s	4 s	4 s	4 s
Resistance - Initial (Ri) (Min)	350 mOhms	350 mOhms	350 mOhms	350 mOhms
Resistance - Post Trip (R1) (Max)	1.4 Ohms	1.4 Ohms	1.4 Ohms	1.4 Ohms
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	2-SMD	2-SMD	2-SMD	2-SMD
Size / Dimension	0.287" L x 0.214" W (7.31mm x 5.44mm)	0.287" L x 0.214" W (7.31mm x 5.44mm)	0.287" L x 0.214" W (7.31mm x 5.44mm)	0.289" L x 0.214" W (7.36mm x 5.44mm)
Thickness (Max)	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)
Ratings	AEC-Q200	AEC-Q200	AEC-Q200	AEC-Q200
Approval Agency	cURus, TUV	cURus, TUV	cURus, TUV	cURus, TUV
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and comply with AEC-Q200 automotive-grade ratings and cURus/TUV approvals. The MF-SM050-2 and MF-SM050/60-2 are parametric equivalents from Bourns Inc., differing only in packaging format: MF-SM050-2 is supplied in Cut Tape and Digi-Reel format, while MF-SM050/60-2 is supplied in Tape & Reel format. The PFSM.050.2 from SCHURTER Inc. is a direct manufacturer alternative with identical electrical specifications and AEC-Q200 compliance. Physical dimensions for PFSM.050.2 show a length variation of 0.002" (0.05mm), which remains within standard PCB footprint tolerances for 2-SMD packages. All parts maintain ROHS3 compliance and are suitable for direct substitution based on provided electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can MF-SM050-2 be used as a direct replacement for MF-SM050-2-006?

A: Yes. MF-SM050-2 is a parametric equivalent with identical electrical specifications, voltage rating, current ratings, resistance characteristics, and operating temperature range. The difference is packaging format: MF-SM050-2 is supplied in Cut Tape and Digi-Reel, while MF-SM050-2-006 is supplied in standard packaging. Both are suitable for surface mount assembly.

Q: What is the difference between MF-SM050/60-2 and MF-SM050-2?

A: Both parts are parametric equivalents from Bourns Inc. with identical electrical and mechanical specifications. The primary difference is packaging: MF-SM050/60-2 is supplied in Tape & Reel format, while MF-SM050-2 is supplied in Cut Tape and Digi-Reel format. Selection depends on assembly process requirements.

Q: Is PFSM.050.2 from SCHURTER compatible with the MF-SM050-2-006?

A: Yes. PFSM.050.2 is a direct manufacturer alternative with matching electrical specifications, current ratings, voltage rating, and resistance characteristics. Physical dimensions are 0.289" L x 0.214" W, representing a 0.002" length variation from the Bourns part. This dimensional difference is within standard PCB footprint tolerances for 2-SMD packages and does not affect functional compatibility.

Q: Are all substitute parts AEC-Q200 rated?

A: Yes. All listed substitute parts carry AEC-Q200 automotive-grade ratings and cURus/TUV approvals, ensuring compliance with automotive and industrial circuit protection standards.

Q: What packaging options are available for these polymeric PTC resettable fuses?

A: MF-SM050-2-006 and MF-SM050-2 are available in Cut Tape and Digi-Reel packaging. MF-SM050/60-2 is available in Tape & Reel format. PFSM.050.2 is available in Tape & Reel format. Selection should align with your assembly equipment and production volume requirements.

Q: Do all parts meet ROHS3 compliance?

A: Yes. All listed parts are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements for electronic component manufacturing and distribution.

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