Bourns MF-R030-AP-99 PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The Bourns MF-R030-AP-99 is a polymeric PTC resettable fuse rated for 60V maximum voltage and 300 mA hold current in a through-hole radial disc package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part operates across a temperature range of -40°C to 85°C and provides automatic reset functionality after overcurrent events.

Substiute Parts

MF-R030-AP-99

Bourns Inc.In Stock: 1009MF-R030-AP-99 Datasheet

Current PartRFQ

MF-R030-AP

Bourns Inc.In Stock: 16635MF-R030-AP Datasheet

Parametric EquivalentRFQ

MF-R030-AP-17

Bourns Inc.In Stock: 1225MF-R030-AP-17 Datasheet

Parametric EquivalentRFQ

MF-RX030/72-AP-17

Bourns Inc.In Stock: 1149MF-RX030/72-AP-17 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MF-R030-AP-99 is determined by strict equivalence across the following critical parameters:

• Voltage rating (60V maximum)
• Hold current (300 mA)
• Trip current (600 mA)
• Resistance characteristics (Ri and R1)
• Operating temperature range (-40°C ~ 85°C)
• Physical form factor (through-hole radial disc)
• Mechanical dimensions and lead spacing

The substitute parts maintain identical electrical performance and mechanical compatibility. Differences in packaging format (Cut Tape vs. Tape & Box) and product status (Active vs. Obsolete) do not affect functional equivalence. One substitute introduces a higher voltage rating (72V), which remains compatible for 60V applications due to voltage derating principles.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts provide direct functional equivalence to the MF-R030-AP-99 based on electrical and mechanical parameters. Selection should be based on the following criteria:

MF-R030-AP is the primary substitute, offering identical specifications with active product status and the highest inventory availability (16599 units). This part is suitable for new designs and ongoing production requiring standard Cut Tape packaging.

MF-R030-AP-17 provides equivalent performance with enhanced compliance certifications (cUL, cURus, TUV, UL vs. cURus, TUV on the original). This part includes AEC-Q200 automotive qualification and Tape & Box packaging, making it appropriate for applications requiring automotive-grade reliability.

MF-RX030/72-AP-17 maintains identical electrical performance at the 300 mA hold current level but operates at a maximum voltage of 72V. This part is suitable for 60V applications where higher voltage margin is beneficial. It includes AEC-Q200 qualification and equivalent certifications to MF-R030-AP-17.

Frequently Asked Questions (FAQ)

Q: Can MF-R030-AP be used as a direct replacement for MF-R030-AP-99?

A: Yes. Both parts share identical electrical specifications (60V, 300 mA hold current, 600 mA trip current) and mechanical form factor (through-hole radial disc, 7.40mm x 3.10mm). The primary difference is product status (Active vs. Obsolete) and packaging format. MF-R030-AP is available in Cut Tape format with significantly higher inventory.

Q: What is the difference between MF-R030-AP-17 and MF-R030-AP?

A: Both parts are electrically and mechanically identical. MF-R030-AP-17 differs in packaging format (Tape & Box vs. Cut Tape) and includes additional compliance certifications (cUL and UL in addition to cURus and TUV) plus AEC-Q200 automotive qualification. Select MF-R030-AP-17 for applications requiring automotive-grade reliability or specific packaging requirements.

Q: Is MF-RX030/72-AP-17 compatible with a 60V circuit designed for MF-R030-AP-99?

A: Yes. MF-RX030/72-AP-17 is rated for 72V maximum voltage and maintains all other electrical parameters identical to the original part (300 mA hold current, 600 mA trip current, 760 mOhms initial resistance). The higher voltage rating provides additional safety margin in 60V applications without affecting performance.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution is determined by voltage rating, hold current, trip current, initial and post-trip resistance, operating temperature range, and physical form factor. All substitute parts maintain these parameters within the specifications of the original MF-R030-AP-99.

Q: Are there any compliance or certification differences between the substitute parts?

A: MF-R030-AP carries cURus and TUV certifications. MF-R030-AP-17 and MF-RX030/72-AP-17 include expanded certifications (cUL, cURus, TUV, UL) and AEC-Q200 automotive qualification. All parts are ROHS3 compliant and REACH unaffected.

Q: Which substitute part should be selected for new production designs?

A: MF-R030-AP is recommended for standard applications due to active product status and highest inventory availability. MF-R030-AP-17 is recommended for automotive or mission-critical applications requiring AEC-Q200 qualification. MF-RX030/72-AP-17 is recommended when higher voltage margin is required.