MFS1/4DCT52R4993F Equivalent & Substitute Parts

Part Overview

The MFS1/4DCT52R4993F is a 499 kOhms ±1% metal film through-hole resistor rated at 0.25W (1/4W) manufactured by KOA Speer Electronics, Inc. This component is designed for axial package applications and meets automotive AEC-Q200 qualification standards. The part is currently in active production status with ROHS3 compliance and REACH unaffected designation.

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or inventory limitations. Equivalent components must maintain identical electrical specifications and mechanical compatibility to ensure direct replacement without circuit redesign.

Substiute Parts

MFS1/4DCT52R4993F

KOA Speer Electronics, Inc.In Stock: 1149MFS1/4DCT52R4993F Datasheet

Current PartRFQ

MFR-25FBF52-499K

YAGEOIn Stock: 4918MFR-25FBF52-499K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MFS1/4DCT52R4993F is determined by strict alignment of the following parameters:

• Resistance value: 499 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.25W / 1/4W (exact match required)
• Composition: Metal Film (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Operating temperature range: -55°C to 155°C (exact match required)
• Package configuration: Axial through-hole (exact match required)
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected (exact match required)

The MFR-25FBF52-499K manufactured by YAGEO meets all substitution criteria and is classified as a direct equivalent part.

Parameter Comparison

Engineering Selection Recommendations

Both the MFS1/4DCT52R4993F and MFR-25FBF52-499K are active production components with equivalent electrical and mechanical specifications. Selection between these parts should be based on:

• Availability and lead time requirements
• Packaging format preference (Cut Tape versus Bulk)
• Supplier inventory levels and procurement timelines
• Regulatory compliance requirements (both meet ROHS3 and REACH standards)

The MFR-25FBF52-499K from YAGEO provides 4,881 units in current inventory, compared to 1,095 units for the KOA Speer MFS1/4DCT52R4993F. Both components maintain identical electrical performance and thermal characteristics across the specified operating range.

Frequently Asked Questions (FAQ)

Q: Can MFR-25FBF52-499K be used as a direct replacement for MFS1/4DCT52R4993F?

A: Yes. Both components share identical resistance value (499 kOhms), tolerance (±1%), power rating (0.25W), composition (metal film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and axial package configuration. Regulatory compliance is equivalent for both parts.

Q: Are there dimensional differences between these parts?

A: Yes. The MFS1/4DCT52R4993F measures 0.067" diameter × 0.126" length (1.70mm × 3.20mm), while the MFR-25FBF52-499K measures 0.094" diameter × 0.248" length (2.40mm × 6.30mm). Both are axial through-hole components and will function identically in circuit applications, though physical board layout spacing may require adjustment.

Q: Do both parts meet automotive standards?

A: The MFS1/4DCT52R4993F carries AEC-Q200 automotive qualification. The MFR-25FBF52-499K does not list automotive qualification in the provided specifications. Automotive applications requiring AEC-Q200 certification should prioritize the KOA Speer component.

Q: What is the difference between Cut Tape and Bulk packaging?

A: Cut Tape packaging provides components on individual tape segments suitable for automated pick-and-place assembly. Bulk packaging provides loose components in larger quantities. Selection depends on assembly process requirements and volume needs.

Q: Are both parts RoHS compliant?

A: Yes. Both MFS1/4DCT52R4993F and MFR-25FBF52-499K are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.