MF-FSML150/8-2 Equivalent & Substitute Parts

Part Overview

The MF-FSML150/8-2 is a Polymeric PTC Resettable Fuse manufactured by Bourns Inc., rated at 8V with a 1.5A hold current. This component is designed for overcurrent protection in surface mount applications using the 0603 (1608 Metric) package format. The part is currently in active production status with 5031 units available in inventory. Equivalent and substitute parts are identified when they maintain compatibility across critical electrical and mechanical parameters while meeting the same regulatory compliance standards.

Substiute Parts

MF-FSML150/8-2

Bourns Inc.In Stock: 5063MF-FSML150/8-2 Datasheet

Current PartRFQ

PTSLR06036V150

Eaton - Electronics DivisionIn Stock: 6226PTSLR06036V150 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF-FSML150/8-2 is determined by the following critical parameters:

• Voltage Rating: Maximum voltage must be equal to or greater than 8V
• Current - Hold (Ih): Must match 1.5A specification
• Current - Trip (It): Must match 3A specification
• Package Format: Must be 0603 (1608 Metric), Concave
• Mounting Type: Must be Surface Mount
• Resistance - Post Trip (R1): Must not exceed 120 mOhms
• Operating Temperature Range: Must support -40°C ~ 85°C
• Regulatory Compliance: Must maintain ROHS3 compliance and equivalent approval certifications

The PTSLR06036V150 from Eaton - Electronics Division is identified as a substitute part. However, this part operates at a maximum voltage of 6V, which is below the 8V rating of the main part. This represents a voltage derating and requires engineering evaluation for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The PTSLR06036V150 maintains electrical and mechanical compatibility with the MF-FSML150/8-2 across hold current, trip current, maximum current, trip time, post-trip resistance, operating temperature range, and package format. Both parts are ROHS3 compliant and carry equivalent regulatory approvals from cURus and TUV.

The primary difference is the maximum voltage rating: the Eaton part is rated at 6V versus the Bourns part at 8V. This represents a voltage derating of 2V and must be evaluated against the specific circuit voltage requirements. The Eaton part also exhibits a higher initial resistance (20 mOhms minimum versus 10 mOhms minimum) and carries a longer moisture sensitivity window (1 Year versus 4 Weeks).

Selection between these parts depends on whether the application circuit voltage is within the 6V maximum rating of the Eaton substitute and whether the higher initial resistance is acceptable for the intended circuit design.

Frequently Asked Questions (FAQ)

Q: Can the PTSLR06036V150 be used as a direct replacement for the MF-FSML150/8-2?

A: Direct replacement is possible only if the application circuit voltage does not exceed 6V. The Eaton part is rated for 6V maximum, while the Bourns part is rated for 8V maximum. If the circuit operates above 6V, the substitute part is not suitable.

Q: What are the key electrical parameters that must match between these parts?

A: The critical matching parameters are Current - Hold (Ih) at 1.5A, Current - Trip (It) at 3A, and Resistance - Post Trip (R1) maximum at 120 mOhms. Both parts meet these specifications identically.

Q: Are there differences in regulatory compliance between these parts?

A: Both parts are ROHS3 compliant. The Bourns part carries cUL, cURus, and TUV approvals, while the Eaton part carries cURus and TUV approvals. The absence of cUL certification on the Eaton part may be relevant for specific applications requiring UL listing.

Q: How do the package dimensions differ?

A: Both parts use the 0603 (1608 Metric) Concave package format. The Bourns part measures 0.065" L x 0.033" W with 0.055" maximum thickness, while the Eaton part measures 0.071" L x 0.039" W with 0.039" maximum thickness. These dimensional differences are within the 0603 package specification but should be verified for PCB layout compatibility.

Q: What is the significance of the moisture sensitivity level difference?

A: The Bourns part is rated MSL 2A (4 Weeks), while the Eaton part is rated MSL 2 (1 Year). This indicates the Eaton part has a longer shelf life before moisture absorption becomes a concern. Both parts require proper storage and handling according to their respective MSL ratings.