MF-R900-AP Equivalent & Substitute Parts

Part Overview

The MF-R900-AP is a polymeric PTC resettable fuse manufactured by Bourns Inc., rated for 30V maximum voltage and 9A hold current. This component is designed for overcurrent protection in electronic circuits through automatic thermal reset functionality. The part is currently in active production status with full RoHS3 compliance and cURus/TUV approval certifications. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and regulatory compliance are maintained across alternative manufacturers.

Substiute Parts

MF-R900-AP

Bourns Inc.In Stock: 1082MF-R900-AP Datasheet

Current PartRFQ

30R900UMR

Littelfuse Inc.In Stock: 2354630R900UMR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF-R900-AP is determined by strict equivalence across the following critical parameters:

• Voltage rating: 30V maximum
• Hold current (Ih): 9A maximum
• Trip current (It): 18A
• Maximum current capacity: 40A
• Time to trip: 20 seconds
• Initial resistance: 5 mOhms minimum
• Post-trip resistance: 20 mOhms maximum
• Operating temperature range: -40°C to 85°C
• Mounting configuration: Through hole radial disc package
• Lead spacing: 0.402" (10.20mm)
• Regulatory compliance: cURus and TUV approval

Parts meeting all these criteria are classified as direct electrical and mechanical equivalents, regardless of manufacturer or series designation.

Parameter Comparison

Engineering Selection Recommendations

The 30R900UMR manufactured by Littelfuse Inc. is a direct equivalent to the MF-R900-AP. Both components maintain identical electrical specifications, thermal characteristics, and mechanical dimensions within the specified tolerances. Both parts carry active product status, full RoHS3 compliance certification, and equivalent regulatory approvals (cURus and TUV). Selection between these parts may be based on packaging format availability (Tape & Box for MF-R900-AP versus Cut Tape for 30R900UMR) and inventory considerations.

Frequently Asked Questions (FAQ)

Q: Can the 30R900UMR be used as a direct replacement for the MF-R900-AP in existing designs?

A: Yes. Both parts meet identical electrical ratings (30V, 9A hold current, 18A trip current), thermal specifications (-40°C to 85°C), and mechanical requirements (through hole radial disc, 0.402" lead spacing). Regulatory certifications are equivalent.

Q: What is the difference between the packaging formats listed?

A: The MF-R900-AP is supplied in Tape & Box (TB) format, while the 30R900UMR is supplied in Cut Tape (CT) format. Both formats contain the same component; packaging format selection depends on assembly process requirements and inventory management practices.

Q: Are there any dimensional differences between these parts?

A: Minor dimensional variations exist within acceptable tolerances. The MF-R900-AP measures 0.953" L x 0.118" W with 1.295" seated height, while the 30R900UMR measures 0.950" L x 0.120" W with 1.244" seated height. These variations remain within standard mechanical compatibility for through-hole radial disc packages with 0.402" lead spacing.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the MF-R900-AP and 30R900UMR carry cURus and TUV approvals, maintain ROHS3 compliance, and are REACH unaffected. Both are classified under ECCN EAR99 and HTSUS 8533.40.8070.