Bourns MF-R110-2 Polymeric PTC Resettable Fuse - Equivalent & Substitute Parts

Part Overview

The Bourns MF-R110-2 is a polymeric PTC resettable fuse rated for 30V maximum voltage with a 1.1A hold current. This through-hole radial disc component provides overcurrent protection in electronic circuits and automatically resets after the fault condition is removed. The part is actively manufactured and maintains full compliance with RoHS3 and REACH regulations. Substitute parts may be required due to inventory availability, regional sourcing constraints, or specific packaging preferences while maintaining identical electrical and mechanical performance.

Substiute Parts

MF-R110-2

Bourns Inc.In Stock: 4468MF-R110-2 Datasheet

Current PartRFQ

MF-R110-AP

Bourns Inc.In Stock: 1130MF-R110-AP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MF-R110-2 is determined by strict equivalence across the following critical parameters:

• Voltage rating: 30V maximum
• Hold current (Ih): 1.1A maximum
• Trip current (It): 2.2A
• Time to trip: 6.6 seconds
• Initial resistance (Ri): 100 mOhms minimum
• Post-trip resistance (R1): 270 mOhms maximum
• Operating temperature range: -40°C to 85°C
• Mounting configuration: Through-hole radial disc
• Physical dimensions: 0.350" diameter x 0.118" thickness with 0.201" lead spacing
• Regulatory compliance: RoHS3 and cURus/TUV certification

Parts meeting all these parameters are direct functional equivalents suitable for direct replacement without circuit redesign or performance degradation.

Parameter Comparison

Engineering Selection Recommendations

Both the MF-R110-2 and MF-R110-AP are manufactured by Bourns Inc. and maintain identical electrical specifications, mechanical dimensions, and regulatory certifications. Both parts are active products with current manufacturing status. Selection between these parts should be based on inventory availability and packaging format (both supplied in Cut Tape). The MF-R110-AP is a direct parametric equivalent with no performance or compliance trade-offs.

Frequently Asked Questions (FAQ)

Q: Can MF-R110-AP be used as a direct replacement for MF-R110-2?

A: Yes. The MF-R110-AP meets all electrical parameters, mechanical dimensions, and regulatory requirements of the MF-R110-2. Direct substitution is supported without circuit modification.

Q: Are there differences in hold current or trip current between these parts?

A: No. Both parts specify identical hold current (1.1A maximum), trip current (2.2A), and time-to-trip (6.6 seconds) characteristics.

Q: Do both parts support the same operating temperature range?

A: Yes. Both the MF-R110-2 and MF-R110-AP operate across -40°C to 85°C.

Q: Are the physical dimensions identical?

A: Yes. Both parts are 0.350" diameter x 0.118" thickness with 0.201" lead spacing, suitable for identical PCB footprints.

Q: What regulatory certifications apply to both parts?

A: Both parts carry cURus and TUV approval and are RoHS3 compliant. REACH status is unaffected for both.

Q: Is there a difference in initial or post-trip resistance?

A: No. Both parts specify 100 mOhms minimum initial resistance and 270 mOhms maximum post-trip resistance.