MF1/4DC49R9F Equivalent & Substitute Parts

Part Overview

The MF1/4DC49R9F is a 49.9 Ohms ±1% 0.25W through-hole resistor manufactured by KOA Speer Electronics, Inc. This metal film axial resistor is designed for automotive applications and meets AEC-Q200 qualification standards. The part is currently in active production status with 996 pieces available in bulk packaging. Substitute parts are identified to address packaging format availability and inventory requirements while maintaining identical electrical and mechanical specifications.

Substiute Parts

MF1/4DC49R9F

KOA Speer Electronics, Inc.In Stock: 1067MF1/4DC49R9F Datasheet

Current PartRFQ

MF1/4DCT52R49R9F

KOA Speer Electronics, Inc.In Stock: 6015MF1/4DCT52R49R9F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF1/4DC49R9F is determined by strict equivalence across the following critical parameters:

• Resistance value: 49.9 Ohms
• Tolerance: ±1%
• Power rating: 0.25W (1/4W)
• Composition: Metal Film
• Package type: Axial
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C to 155°C
• Automotive qualification: AEC-Q200
• Physical dimensions: 0.091" Dia x 0.248" L (2.30mm x 6.30mm)
• Termination count: 2
• Compliance: ROHS3 Compliant

The identified substitute part MF1/4DCT52R49R9F maintains all electrical and mechanical parameters identically. The only difference is the packaging format: the main part is supplied in bulk packaging, while the substitute is supplied in cut tape (CT) format. Both parts are manufactured by KOA Speer Electronics, Inc. and carry active product status.

Parameter Comparison

Engineering Selection Recommendations

Both MF1/4DC49R9F and MF1/4DCT52R49R9F are active production parts from KOA Speer Electronics, Inc. with identical electrical specifications and AEC-Q200 automotive qualification. Selection between these parts is determined by packaging requirements and inventory availability rather than electrical performance.

The MF1/4DC49R9F in bulk packaging is suitable for high-volume manufacturing environments where components are supplied in loose form. The MF1/4DCT52R49R9F in cut tape format is appropriate for automated assembly processes and applications requiring tape-and-reel handling. Both parts maintain ROHS3 compliance and are suitable for automotive applications operating within the -55°C to 155°C temperature range.

Frequently Asked Questions (FAQ)

Q: Can MF1/4DCT52R49R9F replace MF1/4DC49R9F in circuit design?

A: Yes. Both parts are electrically and mechanically identical with 49.9 Ohms ±1% resistance, 0.25W power rating, metal film composition, and AEC-Q200 automotive qualification. The difference is packaging format only.

Q: What is the difference between bulk and cut tape packaging?

A: Bulk packaging supplies loose components suitable for manual assembly or bulk handling. Cut tape packaging supplies components on adhesive tape in reel format, designed for automated pick-and-place assembly equipment.

Q: Are both parts suitable for automotive applications?

A: Yes. Both MF1/4DC49R9F and MF1/4DCT52R49R9F carry AEC-Q200 qualification and are rated for automotive use across the -55°C to 155°C operating temperature range.

Q: Do both parts meet RoHS compliance requirements?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected.

Q: What is the temperature coefficient specification?

A: Both parts have a temperature coefficient of ±100ppm/°C, ensuring stable resistance performance across the full operating temperature range.