MF-USML380/6-2 Equivalent & Substitute Parts

Part Overview

The MF-USML380/6-2 is a polymeric PTC resettable fuse manufactured by Bourns Inc. as part of the Multifuse® MF-USML/X series. This surface mount component is designed for overcurrent protection in electronic circuits, offering automatic reset capability after fault conditions are cleared. The part is currently in active production status with 733 units in stock. Substitute parts are identified when design requirements change, such as voltage rating adjustments, or when inventory constraints necessitate alternative sourcing from the same product family.

Substiute Parts

MF-USML380/6-2

Bourns Inc.In Stock: 769MF-USML380/6-2 Datasheet

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MF-USML380/12-2

Bourns Inc.In Stock: 2816MF-USML380/12-2 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF-USML380/6-2 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Series: Multifuse® MF-USML/X
• Type: Polymeric
• Current - Hold (Ih) (Max): 3.8 A
• Current - Trip (It): 7.6 A
• Package / Case: 1210 (3225 Metric), Concave
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 85°C

Allowable Variation Parameters:

• Voltage - Max: May vary based on circuit requirements

The MF-USML380/12-2 qualifies as a substitute because it maintains identical hold current, trip current, package dimensions, mounting configuration, and operating temperature range. The voltage rating difference (12V vs. 6V) represents an upgrade path suitable for applications requiring higher voltage protection while maintaining the same current protection characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the MF-USML380/6-2 and MF-USML380/12-2 are active production components from Bourns Inc. with full regulatory compliance. Selection between these parts depends on circuit voltage requirements:

MF-USML380/6-2 is appropriate for circuits operating at or below 6V where the 3.8 A hold current and 7.6 A trip current provide the required protection threshold.

MF-USML380/12-2 is appropriate for circuits operating at or below 12V with identical current protection characteristics. This part offers expanded voltage compatibility while maintaining all other electrical and mechanical specifications.

Both parts carry ROHS3 compliance, cURus and TUV certifications (MF-USML380/12-2 includes additional cUL certification), and identical moisture sensitivity ratings. The 1210 surface mount package ensures PCB footprint compatibility between the two options.

Frequently Asked Questions (FAQ)

Q: Can MF-USML380/12-2 be used in place of MF-USML380/6-2?

A: Yes, when circuit voltage requirements permit. The MF-USML380/12-2 maintains identical current protection characteristics (3.8 A hold, 7.6 A trip) and package dimensions. The higher voltage rating (12V vs. 6V) does not affect performance in lower voltage applications.

Q: Are the PCB footprints identical?

A: Yes. Both parts use the 1210 (3225 Metric) surface mount package with concave configuration and identical dimensions of 0.127" L x 0.101" W (3.22mm x 2.58mm). No PCB layout modifications are required for substitution.

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

A: Current - Hold (Ih) at 3.8 A, Current - Trip (It) at 7.6 A, package type 1210 (3225 Metric), surface mount configuration, and operating temperature range -40°C to 85°C must remain constant. Voltage rating may be increased to accommodate higher circuit voltages.

Q: Do both parts have the same certifications?

A: Both parts are ROHS3 compliant and REACH unaffected. MF-USML380/6-2 carries cURus and TUV approvals. MF-USML380/12-2 carries cUL, cURus, and TUV approvals, providing additional certification coverage.

Q: What is the moisture sensitivity level for storage?

A: Both parts are rated MSL 2A with a 4-week floor life. Standard moisture control procedures apply during storage and handling.