Equivalent & Substitute Parts for MF-PSML175-2

Part Overview

The MF-PSML175-2 is a Polymeric PTC Resettable Fuse manufactured by Bourns Inc., rated for 6V maximum voltage with 1.75A hold current in a 0805 (2012 Metric) surface mount package. This component is classified as Obsolete, which necessitates identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical and mechanical compatibility while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value
Voltage - Max	6V
Current - Hold (Ih)	1.75A
Mounting Type	Surface Mount
Package / Case	0805 (2012 Metric), Concave
Operating Temperature	-40°C ~ 85°C
Type	Polymeric
RoHS Status	ROHS3 Compliant
Approval Agency	cURus, TUV

Substitute Part Grouping Explanation

Substitution eligibility for the MF-PSML175-2 is determined by the following critical parameters:

Voltage Rating: Maximum voltage must be 6V or greater
Current - Hold (Ih): Must be 1.75A or greater to maintain circuit protection characteristics
Package / Case: Must be 0805 (2012 Metric) for PCB footprint compatibility
Mounting Type: Must be Surface Mount
Operating Temperature Range: Must encompass -40°C ~ 85°C
Type: Must be Polymeric PTC Resettable Fuse
Compliance: Must maintain ROHS3 compliance and cURus/TUV approvals

Two active substitute parts meet these criteria: MF-PSML175/6-2 (Bourns Inc.) and 0805L175SLYR (Littelfuse Inc.). Both are classified as Active products with current manufacturing status and full compliance documentation.

Parameter Comparison

Parameter	MF-PSML175-2 (Main)	MF-PSML175/6-2	0805L175SLYR
Manufacturer	Bourns Inc.	Bourns Inc.	Littelfuse Inc.
Voltage - Max	6V	6V	6V
Current - Hold (Ih) (Max)	1.75A	1.75A	1.75A
Current - Trip (It)	Not specified	4.6A	4.6A
Current - Max	Not specified	50A	50A
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	0805 (2012 Metric), Concave	0805 (2012 Metric), Concave	0805 (2012 Metric), Concave
Size / Dimension	0.085" L x 0.053" W (2.15mm x 1.35mm)	0.085" L x 0.053" W (2.15mm x 1.35mm)	0.083" L x 0.053" W (2.10mm x 1.35mm)
Thickness (Max)	0.024" (0.60mm)	0.028" (0.70mm)	0.024" (0.60mm)
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Type	Polymeric	Polymeric	Polymeric
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	cURus, TUV	cURus, TUV	cURus, TUV
Moisture Sensitivity Level (MSL)	2A (4 Weeks)	2A (4 Weeks)	1 (Unlimited)

Engineering Selection Recommendations

Both MF-PSML175/6-2 and 0805L175SLYR are qualified substitutes for the obsolete MF-PSML175-2 based on electrical and mechanical parameter alignment. Selection between these alternatives should consider the following factors:

MF-PSML175/6-2 (Bourns Inc.): Maintains manufacturer continuity with the original part. Identical dimensional specifications and thickness profile. Active product status with established supply chain. Suitable for direct replacement in existing designs.

0805L175SLYR (Littelfuse Inc.): Offers superior moisture sensitivity rating (MSL 1 vs. 2A), providing extended shelf life without moisture bake-out requirements. Slightly reduced length (2.10mm vs. 2.15mm) and identical thickness to the original part. Active product status with high inventory availability.

Both parts carry identical electrical ratings, operating temperature ranges, and regulatory approvals. Selection may be based on supply availability, cost considerations, or specific moisture sensitivity requirements for storage and handling.

Frequently Asked Questions (FAQ)

Q: Can MF-PSML175/6-2 be used as a direct replacement for MF-PSML175-2?

A: Yes. Both parts share identical voltage (6V), current hold (1.75A), package (0805 2012 Metric), and operating temperature specifications. The primary difference is product status: MF-PSML175/6-2 is Active while MF-PSML175-2 is Obsolete. Mechanical dimensions are equivalent.

Q: What is the difference between MF-PSML175/6-2 and 0805L175SLYR?

A: Both parts meet the same electrical specifications (6V, 1.75A Ih). Key differences include: manufacturer (Bourns vs. Littelfuse), moisture sensitivity level (2A vs. 1), and minor dimensional variation in length (2.15mm vs. 2.10mm). Thickness is identical at 0.60mm for the Littelfuse part and 0.70mm for the Bourns part.

Q: Are there any PCB layout considerations when switching between these substitutes?

A: The 0805L175SLYR has a slightly shorter length (2.10mm vs. 2.15mm), which is within standard 0805 package tolerance. Both parts use identical 0805 (2012 Metric) footprints and are mechanically compatible with existing PCB designs. No layout modifications are required.

Q: Which substitute offers better long-term storage characteristics?

A: The 0805L175SLYR features MSL 1 (Unlimited), eliminating moisture bake-out requirements. The MF-PSML175/6-2 requires MSL 2A handling (4-week shelf life), necessitating moisture control during storage. For applications with extended storage periods, 0805L175SLYR provides operational advantages.

Q: Do both substitutes maintain the same regulatory approvals as the original part?

A: Yes. Both MF-PSML175/6-2 and 0805L175SLYR carry cURus and TUV approvals and are ROHS3 compliant, matching the original MF-PSML175-2 certifications.

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