MF-USMD110-2 Equivalent & Substitute Parts

Part Overview

The MF-USMD110-2 is a Polymeric PTC Resettable Fuse manufactured by Bourns Inc., rated for 6V with a 1.1A hold current. This component is designed for surface mount applications in the 1210 (3225 Metric) package format. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement planning.

Substiute Parts

MF-USMD110-2

Bourns Inc.In Stock: 1243MF-USMD110-2 Datasheet

Current PartRFQ

MF-USMF110-2

Bourns Inc.In Stock: 9269MF-USMF110-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MF-USMD110-2 is determined by strict equivalence across the following critical parameters:

• Voltage rating: 6V maximum
• Current hold specification: 1.1A
• Current trip specification: 2.2A
• Resistance characteristics: Initial minimum 50 mOhms, post-trip maximum 210 mOhms
• Package format: 1210 (3225 Metric) surface mount
• Operating temperature range: -40°C to 85°C

The MF-USMF110-2 meets all these electrical and mechanical requirements, providing direct functional equivalence for circuit protection applications requiring these exact specifications.

Parameter Comparison

Engineering Selection Recommendations

The MF-USMF110-2 is the direct substitute for the obsolete MF-USMD110-2. Both components share identical electrical specifications and package dimensions, ensuring functional compatibility in existing circuit designs.

The MF-USMF110-2 offers the advantage of active product status with ROHS3 compliance, addressing regulatory requirements for new designs and procurement. The concave package variant does not affect electrical performance or circuit board compatibility for standard surface mount assembly processes.

Selection of the MF-USMF110-2 is appropriate for applications requiring 6V, 1.1A hold current PTC resettable fuse protection in 1210 package format.

Frequently Asked Questions (FAQ)

Q: Can the MF-USMF110-2 directly replace the MF-USMD110-2 in existing designs?

A: Yes. Both parts share identical electrical specifications including voltage rating, current hold and trip values, resistance characteristics, and operating temperature range. The package format is equivalent, with the MF-USMF110-2 featuring a concave variant that does not affect circuit board layout or assembly compatibility.

Q: What is the difference between the standard and concave package variants?

A: The MF-USMF110-2 uses a concave package geometry within the same 1210 (3225 Metric) footprint. This geometric variation does not alter electrical performance or standard surface mount assembly procedures.

Q: Why is RoHS compliance status different between the two parts?

A: The MF-USMD110-2 is obsolete and carries RoHS non-compliant status. The MF-USMF110-2 is an active product meeting ROHS3 compliance standards, making it suitable for applications subject to environmental and regulatory requirements.

Q: Are there any thermal or mechanical differences that would affect circuit design?

A: No. Both parts operate across the identical temperature range of -40°C to 85°C and maintain the same resistance characteristics. Mechanical dimensions are equivalent within the 1210 package specification.

Q: What certifications apply to the substitute part?

A: The MF-USMF110-2 carries cURus and TUV approvals. The original MF-USMD110-2 held CSA, TUV, and UR certifications. Verification of certification requirements for your specific application is necessary.