MLF14FTC681R Equivalent & Substitute Parts

Part Overview

The MLF14FTC681R is a 681 Ohm ±1% 1/4W (0.25W) thin film chip resistor in MELF 0204 package manufactured by Stackpole Electronics Inc. This component is actively produced and widely used in precision analog circuits, measurement equipment, and applications requiring stable resistive elements with tight tolerance specifications. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within specified parameter ranges.

Substiute Parts

MLF14FTC681R

Stackpole Electronics IncIn Stock: 856MLF14FTC681R Datasheet

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MMA02040C6810FB300

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 11035MMA02040C6810FB300 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MLF14FTC681R is determined by the following critical parameters:

• Resistance value must be 681 Ohms
• Tolerance must be ±1% or tighter
• Package must be MELF 0204 (mechanical and electrical compatibility)
• Composition must be thin film (performance characteristics)
• Temperature coefficient must be ±50ppm/°C or better
• Operating temperature range must encompass -55°C to 155°C
• Power rating must be equal to or greater than 0.25W

The substitute part MMA02040C6810FB300 meets all these criteria with a higher power rating of 0.4W (2/5W), making it suitable for applications requiring equal or greater power dissipation capability within the same physical footprint.

Parameter Comparison

Engineering Selection Recommendations

Both the MLF14FTC681R and MMA02040C6810FB300 are active production components with ROHS3 compliance and identical electrical specifications for resistance, tolerance, and temperature performance. The primary distinction is the power rating differential: the substitute part provides 0.4W versus the original 0.25W specification.

Selection between these parts depends on circuit power dissipation requirements. The MLF14FTC681R is appropriate for applications with power dissipation at or below 0.25W. The MMA02040C6810FB300 is suitable for applications requiring power dissipation up to 0.4W while maintaining identical resistance and tolerance characteristics. Both components are certified to AEC-Q200 automotive standards where applicable, ensuring reliability across specified operating conditions.

Frequently Asked Questions (FAQ)

Q: Can MMA02040C6810FB300 be used as a direct replacement for MLF14FTC681R?

A: Yes, within applications where power dissipation does not exceed 0.4W. The higher power rating of the substitute part does not degrade performance in lower-power applications. Physical dimensions are compatible within MELF 0204 package specifications.

Q: What is the significance of the power rating difference?

A: Power rating indicates maximum continuous power dissipation capability. The substitute part's 0.4W rating provides additional thermal margin compared to the 0.25W original specification. This does not affect electrical performance in circuits designed for the lower rating.

Q: Are the temperature coefficients identical?

A: Yes. Both parts specify ±50ppm/°C temperature coefficient and operate across -55°C to 155°C, ensuring equivalent frequency stability and thermal performance characteristics.

Q: Do packaging differences affect compatibility?

A: Both parts use MELF 0204 package with identical electrical terminations (2 terminations). Physical dimensions are within compatible tolerances for standard PCB footprints designed for 0204 MELF components.

Q: What compliance certifications apply to both parts?

A: Both components are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (unlimited moisture sensitivity level). The substitute part carries AEC-Q200 automotive qualification.