MF-USML200/6-2 Equivalent & Substitute Parts

Part Overview

The MF-USML200/6-2 is a polymeric PTC resettable fuse manufactured by Bourns Inc., rated for 6V maximum voltage with 2A hold current. This surface mount component in 1210 (3225 Metric) package is designed for overcurrent protection in electronic circuits. The part maintains active product status with full RoHS3 compliance and cURus/TUV approvals. Substitute parts are identified when equivalent electrical and mechanical parameters align with application requirements, enabling component sourcing flexibility while maintaining circuit protection specifications.

Substiute Parts

MF-USML200/6-2

Bourns Inc.In Stock: 1108MF-USML200/6-2 Datasheet

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MF-USML200/12-2

Bourns Inc.In Stock: 2767MF-USML200/12-2 Datasheet

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PTSLR12106V200

Eaton - Electronics DivisionIn Stock: 3652PTSLR12106V200 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MF-USML200/6-2 are classified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• Voltage rating: 6V maximum
• Current hold (Ih): 2A maximum
• Current trip (It): 4A
• Package type: 1210 (3225 Metric), Concave surface mount
• Polymeric PTC resettable fuse technology
• Operating temperature range: -40°C to 85°C

Substitute Classification:

Direct Equivalent (Same Voltage): PTSLR12106V200 (Eaton - Electronics Division) matches the 6V voltage rating, 2A hold current, 4A trip current, and 1210 package configuration. This part provides functional equivalence for direct replacement in 6V circuits.

Voltage Upgrade Option: MF-USML200/12-2 (Bourns Inc.) operates at 12V maximum voltage with identical 2A hold current and 4A trip current specifications. This part is suitable for applications requiring higher voltage protection while maintaining the same current protection characteristics and package form factor.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement in 6V Circuits: PTSLR12106V200 provides functional equivalence to MF-USML200/6-2 with identical voltage and current specifications. Both parts carry cURus and TUV approvals and maintain ROHS3 compliance. The Eaton part exhibits faster trip time (3s vs 5s) and lower post-trip resistance (24 mOhms vs 40 mOhms), which may affect circuit behavior during fault conditions. Selection should confirm compatibility with circuit timing and thermal requirements.

For Voltage-Upgraded Applications: MF-USML200/12-2 maintains the same manufacturer (Bourns Inc.) and current protection ratings while supporting 12V maximum voltage. This part includes cUL certification in addition to cURus and TUV approvals. Use this part when circuit voltage exceeds 6V but current protection requirements remain at 2A hold current.

Compliance Considerations: All three parts maintain active product status, ROHS3 compliance, and appropriate regulatory approvals. Selection based on voltage requirements and circuit timing specifications ensures proper protection function.

Frequently Asked Questions (FAQ)

Q: Can PTSLR12106V200 replace MF-USML200/6-2 in all applications? A: PTSLR12106V200 matches the 6V voltage rating, 2A hold current, and 4A trip current of MF-USML200/6-2. However, the Eaton part has faster trip time (3s vs 5s) and lower post-trip resistance (24 mOhms vs 40 mOhms). Verify circuit timing and thermal behavior before substitution.

Q: When should I use MF-USML200/12-2 instead of the original part? A: Use MF-USML200/12-2 when your circuit operates at voltages above 6V but requires the same 2A hold current protection. This part maintains identical current specifications and package form factor while supporting higher voltage operation.

Q: Are all substitute parts in the same package? A: Yes. MF-USML200/6-2, PTSLR12106V200, and MF-USML200/12-2 all use the 1210 (3225 Metric) concave surface mount package with identical footprint dimensions (0.127" L x 0.101" W / 3.22mm x 2.58mm).

Q: What are the key differences between the substitute parts? A: PTSLR12106V200 (Eaton) matches the 6V rating but has faster trip time and lower post-trip resistance. MF-USML200/12-2 (Bourns) maintains identical electrical characteristics to the original but operates at 12V maximum voltage.

Q: Do all parts meet the same regulatory standards? A: MF-USML200/6-2 and PTSLR12106V200 carry cURus and TUV approvals. MF-USML200/12-2 includes additional cUL certification. All three parts are ROHS3 compliant and maintain active product status.