MF-R090-AP-99 Equivalent & Substitute Parts

Part Overview

The Bourns MF-R090-AP-99 is a Polymeric PTC Resettable Fuse rated for 60V, 900 mA hold current, designed for through-hole radial mounting in disc configuration. This part carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value
Voltage - Max	60V
Current - Hold (Ih) (Max)	900 mA
Current - Trip (It)	1.8 A
Current - Max	40 A
Time to Trip	7.2 s
Resistance - Initial (Ri) (Min)	140 mOhms
Resistance - Post Trip (R1) (Max)	470 mOhms
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Radial, Disc
Lead Spacing	0.201" (5.10mm)
Approval Agency	cURus, TUV
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the MF-R090-AP-99 are determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters define substitution eligibility:

Voltage rating: 60V maximum
Current hold specification: 900 mA maximum
Current trip specification: 1.8 A
Maximum current: 40 A
Time to trip: 7.2 s
Initial resistance: 140 mOhms minimum
Post-trip resistance: 470 mOhms maximum
Operating temperature range: -40°C ~ 85°C
Mounting configuration: Through hole radial disc
Lead spacing: 0.201" (5.10mm)
Regulatory compliance: cURus, TUV approval

All identified substitutes maintain identical electrical performance and mechanical compatibility. Differences are limited to packaging format and product status.

Parameter Comparison

Parameter	MF-R090-AP-99	MF-R090-AP	MF-R090-AP-9
Manufacturer	Bourns Inc.	Bourns Inc.	Bourns Inc.
Series	Multifuse®, MF-R	Multifuse®, MF-R	Multifuse®, MF-R
Type	Polymeric	Polymeric	Polymeric
Voltage - Max	60V	60V	60V
Current - Hold (Ih) (Max)	900 mA	900 mA	900 mA
Current - Trip (It)	1.8 A	1.8 A	1.8 A
Current - Max	40 A	40 A	40 A
Time to Trip	7.2 s	7.2 s	7.2 s
Resistance - Initial (Ri) (Min)	140 mOhms	140 mOhms	140 mOhms
Resistance - Post Trip (R1) (Max)	470 mOhms	470 mOhms	470 mOhms
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Disc	Radial, Disc	Radial, Disc
Size / Dimension	0.461" L x 0.122" W (11.70mm x 3.10mm)	0.461" L x 0.122" W (11.70mm x 3.10mm)	0.461" L x 0.122" W (11.70mm x 3.10mm)
Height - Seated (Max)	0.657" (16.70mm)	0.657" (16.70mm)	0.657" (16.70mm)
Lead Spacing	0.201" (5.10mm)	0.201" (5.10mm)	0.201" (5.10mm)
Approval Agency	cURus, TUV	cURus, TUV	cURus, TUV
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active
Packaging	-	Cut Tape (CT)	Tape & Box (TB)

Engineering Selection Recommendations

Both MF-R090-AP and MF-R090-AP-9 are direct functional equivalents to the MF-R090-AP-99. Selection between these substitutes is based on product availability and packaging requirements:

MF-R090-AP carries Active product status with Cut Tape (CT) packaging, providing standard component availability for production environments. MF-R090-AP-9 carries Active product status with Tape & Box (TB) packaging, suitable for applications requiring boxed component delivery.

Both substitutes maintain full compliance with ROHS3 and carry identical regulatory approvals (cURus, TUV). Electrical performance, mechanical dimensions, and thermal operating range are identical across all three part numbers.

Frequently Asked Questions (FAQ)

Q: Can MF-R090-AP or MF-R090-AP-9 be used as direct replacements for MF-R090-AP-99?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, mechanical dimensions, and regulatory certifications. The only differences are product status and packaging format.

Q: What is the difference between Cut Tape (CT) and Tape & Box (TB) packaging?

A: Cut Tape packaging delivers components on continuous tape, typically used for automated assembly. Tape & Box packaging includes boxed quantities of taped components, suitable for manual assembly or smaller production runs.

Q: Are there any compatibility concerns when substituting these parts?

A: No. All three parts share identical lead spacing (0.201"), dimensions (0.461" L x 0.122" W), and through-hole radial mounting configuration. PCB footprints and assembly processes remain unchanged.

Q: Why is MF-R090-AP-99 marked as Obsolete?

A: Product status reflects manufacturer lifecycle decisions. Active alternatives (MF-R090-AP and MF-R090-AP-9) provide continued access to the same electrical and mechanical specifications.

Q: Do all three parts meet the same regulatory requirements?

A: Yes. All parts carry cURus and TUV approvals and are ROHS3 compliant. Regulatory compliance is identical across MF-R090-AP-99, MF-R090-AP, and MF-R090-AP-9.

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