MF-FSML175/8-2 Equivalent & Substitute Parts

Part Overview

The MF-FSML175/8-2 is a Polymeric PTC Resettable Fuse manufactured by Bourns Inc., rated at 8V with a 1.75A hold current. This component is designed for overcurrent protection in surface mount applications using the 0603 (1608 Metric) package format. The part maintains Active product status and is fully RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this product category.

Substiute Parts

MF-FSML175/8-2

Bourns Inc.In Stock: 3756MF-FSML175/8-2 Datasheet

Current PartRFQ

PTSLR06036V175

Eaton - Electronics DivisionIn Stock: 4802PTSLR06036V175 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for PTC resettable fuses is determined by the following critical parameters:

• Current - Hold (Ih) (Max): Must match at 1.75 A
• Current - Trip (It): Must match at 4.6 A
• Resistance - Initial (Ri) (Min): Must match at 8 mOhms
• Resistance - Post Trip (R1) (Max): Must match at 70 mOhms
• Time to Trip: Must match at 5 s
• Package / Case: Must be 0603 (1608 Metric), Concave
• Mounting Type: Must be Surface Mount
• Operating Temperature Range: Must support -40°C ~ 85°C

The substitute part PTSLR06036V175 meets all electrical performance criteria and mechanical compatibility requirements. The voltage rating difference (6V vs 8V) represents a design constraint where the substitute operates at a lower maximum voltage but maintains identical hold current, trip current, and resistance characteristics within the specified operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

Both the MF-FSML175/8-2 and PTSLR06036V175 maintain Active product status and are ROHS3 compliant. The MF-FSML175/8-2 carries cUL, cURus, and TUV approvals, while the PTSLR06036V175 carries cURus and TUV approvals. Selection between these parts depends on circuit voltage requirements: the MF-FSML175/8-2 is suitable for 8V maximum applications, while the PTSLR06036V175 is limited to 6V maximum applications. Both parts share identical hold current, trip current, resistance characteristics, and operating temperature range, ensuring equivalent protection performance within their respective voltage ratings.

Frequently Asked Questions (FAQ)

Q: Can PTSLR06036V175 replace MF-FSML175/8-2 in all applications?

A: Substitution is valid only in circuits where the maximum operating voltage does not exceed 6V. The PTSLR06036V175 is rated for 6V maximum, while the MF-FSML175/8-2 is rated for 8V maximum. All other electrical parameters—hold current, trip current, and resistance characteristics—are identical.

Q: Are the physical dimensions compatible?

A: Both parts use the 0603 (1608 Metric) Concave package format and are Surface Mount components. The MF-FSML175/8-2 has dimensions of 0.065" L x 0.033" W (1.65mm x 0.85mm) with a maximum thickness of 0.055" (1.40mm). The PTSLR06036V175 has dimensions of 0.071" L x 0.039" W (1.80mm x 1.00mm) with a maximum thickness of 0.039" (1.00mm). Verify PCB layout and assembly equipment compatibility before substitution.

Q: What are the key electrical parameters that must match for substitution?

A: The critical parameters are Current - Hold (Ih) at 1.75 A, Current - Trip (It) at 4.6 A, Resistance - Initial (Ri) at 8 mOhms minimum, and Resistance - Post Trip (R1) at 70 mOhms maximum. Both parts meet these specifications identically.

Q: Are both parts compliant with environmental and regulatory standards?

A: Both parts are ROHS3 compliant and REACH unaffected. The MF-FSML175/8-2 holds cUL, cURus, and TUV certifications. The PTSLR06036V175 holds cURus and TUV certifications. Verify that your application requirements align with the available certifications for each part.