Bourns MF-R090-2-9 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The Bourns MF-R090-2-9 is a polymeric PTC resettable fuse rated for 60V maximum voltage with 900 mA hold current. This through-hole radial disc component provides automatic overcurrent protection with automatic recovery capability. The part is active in production status and widely used in circuit protection applications requiring reliable, repeatable fault tolerance. Substitute parts may be required due to inventory availability, lead time optimization, or design revision requirements while maintaining identical electrical and mechanical performance.

Substiute Parts

MF-R090-2-9

Bourns Inc.In Stock: 1179MF-R090-2-9 Datasheet

Current PartRFQ

MF-R090-2

Bourns Inc.In Stock: 18495MF-R090-2 Datasheet

Parametric EquivalentRFQ

MF-R090-AP

Bourns Inc.In Stock: 5201MF-R090-AP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MF-R090-2-9 are determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters define substitution eligibility:

• Voltage rating: 60V maximum
• Hold current: 900 mA maximum
• Trip current: 1.8 A
• Time to trip: 7.2 s
• Initial resistance: 140 mOhms minimum
• Post-trip resistance: 470 mOhms maximum
• Operating temperature: -40°C ~ 85°C
• Mounting type: Through Hole
• Package type: Radial, Disc
• Lead spacing: 0.201" (5.10mm)
• Regulatory compliance: cURus, TUV approval; ROHS3 compliant

All identified substitute parts maintain identical specifications across these parameters, ensuring direct functional and mechanical interchangeability in circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—MF-R090-2-9, MF-R090-2, and MF-R090-AP—are active production components from Bourns Inc. with identical electrical and mechanical specifications. Selection between these parts is based on availability and lead time requirements rather than technical performance differences.

Both substitute parts carry cURus and TUV regulatory approvals and maintain ROHS3 compliance, meeting the same compliance requirements as the primary part. All three components are suitable for direct substitution in circuit protection applications requiring 60V, 900 mA hold current polymeric PTC resettable fuse functionality.

Frequently Asked Questions (FAQ)

Q: Can MF-R090-2 and MF-R090-AP be used interchangeably with MF-R090-2-9?

A: Yes. All three parts share identical electrical parameters (voltage, current ratings, resistance values, trip characteristics) and mechanical specifications (package type, lead spacing, dimensions). They are direct functional equivalents.

Q: Are there any differences in regulatory compliance between these parts?

A: No. All three parts carry identical approvals (cURus, TUV) and maintain ROHS3 compliance status.

Q: What determines the choice between MF-R090-2-9, MF-R090-2, and MF-R090-AP?

A: Selection is based on inventory availability and lead time. All parts are electrically and mechanically identical, so the choice depends on supply chain requirements rather than technical performance.

Q: Will these parts work in the same PCB footprint?

A: Yes. All three parts have identical through-hole radial disc packaging with 0.201" (5.10mm) lead spacing and matching dimensions, ensuring compatibility with the same PCB layout.

Q: Are there any temperature or environmental differences between these parts?

A: No. All three parts operate across the same temperature range (-40°C ~ 85°C) and share identical moisture sensitivity level (MSL 1 - Unlimited).