Equivalent & Substitute Parts for MF-R110-AP-99

Part Overview

The MF-R110-AP-99 is a polymeric PTC resettable fuse manufactured by Bourns Inc. as part of the Multifuse® MF-R series. This component provides overcurrent protection at 30V with a 1.1A hold current rating in a through-hole radial disc package. The MF-R110-AP-99 is currently listed as obsolete, making identification of equivalent substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

MF-R110-AP-99

Bourns Inc.In Stock: 725MF-R110-AP-99 Datasheet

Current PartRFQ

MF-R110-AP

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

Parametric EquivalentRFQ

MF-R110-AP-17

Bourns Inc.In Stock: 749MF-R110-AP-17 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MF-R110-AP-99 are determined by strict equivalence across the following electrical and mechanical 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; 0.201" lead spacing
• Polymeric PTC type classification

All identified substitutes maintain identical electrical performance characteristics and physical form factors, ensuring direct functional replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both MF-R110-AP and MF-R110-AP-17 are direct parametric equivalents to the obsolete MF-R110-AP-99, with all electrical and mechanical specifications identical. Selection between these two active alternatives depends on procurement and compliance requirements:

MF-R110-AP is supplied in Cut Tape (CT) packaging and maintains cURus and TUV certifications, matching the original part's approval agencies.

MF-R110-AP-17 is supplied in Tape & Box (TB) packaging and includes expanded regulatory approvals: cUL, cURus, TUV, and UL. This part also carries AEC-Q200 automotive qualification rating. Selection of MF-R110-AP-17 is appropriate for applications requiring automotive-grade reliability or broader regulatory compliance scope.

Both parts are ROHS3 compliant and carry unlimited moisture sensitivity level (MSL 1), ensuring compatibility with standard manufacturing and storage practices.

Frequently Asked Questions (FAQ)

Q: Can MF-R110-AP or MF-R110-AP-17 be used as direct replacements for MF-R110-AP-99?

A: Yes. Both substitute parts are parametrically equivalent across all electrical performance characteristics (voltage, hold current, trip current, resistance values, and time to trip) and physical dimensions (radial disc package, lead spacing, and form factor). Direct substitution is functionally valid.

Q: What is the difference between MF-R110-AP and MF-R110-AP-17?

A: The primary differences are packaging format and regulatory approvals. MF-R110-AP is supplied in Cut Tape (CT) packaging with cURus and TUV certifications. MF-R110-AP-17 is supplied in Tape & Box (TB) packaging and includes additional certifications (cUL and UL) plus AEC-Q200 automotive qualification. Electrical and mechanical specifications are identical.

Q: Which substitute should I select for new designs?

A: Selection depends on application requirements. For standard industrial applications, either part is suitable. For automotive applications or designs requiring broader regulatory compliance, MF-R110-AP-17 is the appropriate choice due to its AEC-Q200 rating and expanded approval agency certifications.

Q: Are there packaging compatibility considerations?

A: Yes. MF-R110-AP is supplied in Cut Tape (CT) format, suitable for automated pick-and-place assembly. MF-R110-AP-17 is supplied in Tape & Box (TB) format, appropriate for manual handling or lower-volume assembly processes. Verify your assembly equipment compatibility with the selected packaging format.

Q: Do these substitutes maintain the same thermal and environmental performance?

A: Yes. All three parts share identical operating temperature range (-40°C to 85°C), initial resistance (100 mOhms minimum), post-trip resistance (270 mOhms maximum), and moisture sensitivity level (MSL 1 - Unlimited). Environmental performance is equivalent.