LR1F6K81 Equivalent & Substitute Parts

Part Overview

The LR1F6K81 is a 6.81 kOhms ±1% 0.6W through-hole resistor manufactured by TE Connectivity Passive Product in the Neohm series. This axial metal film resistor operates across a temperature range of -55°C to 155°C with a temperature coefficient of ±50ppm/°C. The component is RoHS3 compliant and classified as Active product status. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility requirements are met across alternative manufacturers.

Substiute Parts

LR1F6K81

TE Connectivity Passive ProductIn Stock: 997LR1F6K81 Datasheet

Current PartRFQ

MRS25000C6811FCT00

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 35148MRS25000C6811FCT00 Datasheet

DirectRFQ

MRS25000C6811FRP00

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 9879MRS25000C6811FRP00 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LR1F6K81 are qualified based on the following critical parameters:

• Resistance Value: 6.81 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power Rating: 0.6W (exact match required)
• Composition: Metal Film (exact match required)
• Package Configuration: Axial through-hole (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)
• Operating Temperature Range: -55°C ~ 155°C (exact match required)
• Compliance: RoHS3 compliant (minimum requirement)

The substitute parts identified are manufactured by Vishay Beyschlag/Draloric/BC Components in the MRS25 series. Both substitute parts meet all electrical and mechanical specifications required for direct substitution with the primary LR1F6K81 component.

Parameter Comparison

Engineering Selection Recommendations

Both MRS25000C6811FCT00 and MRS25000C6811FRP00 are direct electrical equivalents to the LR1F6K81. Selection between these substitute parts and the primary component is based on:

Product Status: All three parts maintain Active product status, ensuring continued availability and manufacturer support.

Compliance Certifications: All parts are RoHS3 compliant. The Vishay substitute parts carry REACH Unaffected status, while the TE Connectivity primary part lists REACH Status as Vendor Undefined.

Packaging Consideration: The primary LR1F6K81 is supplied in Tape & Box (TB) packaging. The Vishay substitutes are supplied in Cut Tape (CT) packaging. This distinction affects handling and assembly processes but does not impact electrical or mechanical compatibility.

Physical Dimensions: The Vishay MRS25 series components have slightly larger physical dimensions (0.098" Dia x 0.256" L versus 0.091" Dia x 0.244" L). PCB layout and mechanical clearance must be verified for applications with space constraints.

Frequently Asked Questions (FAQ)

Q: Can MRS25000C6811FCT00 and MRS25000C6811FRP00 be used interchangeably with LR1F6K81?

A: Yes. Both Vishay parts meet all electrical specifications (6.81 kOhms ±1%, 0.6W, ±50ppm/°C, -55°C to 155°C operating range) and mechanical requirements (axial through-hole, 2 terminations) required for direct substitution. Physical dimensions differ slightly but remain compatible with standard through-hole PCB designs.

Q: What is the difference between MRS25000C6811FCT00 and MRS25000C6811FRP00?

A: Both parts are electrically and mechanically identical. The difference lies in packaging designation: FCT00 indicates Cut Tape packaging, while FRP00 also indicates Cut Tape packaging. Both are supplied by Vishay Beyschlag/Draloric/BC Components in the MRS25 series with identical specifications.

Q: Are there packaging compatibility issues when substituting the LR1F6K81?

A: The primary LR1F6K81 is supplied in Tape & Box (TB) format, while substitute parts are supplied in Cut Tape (CT) format. This affects component handling and automated assembly processes but does not impact electrical performance or PCB-level compatibility.

Q: Do the physical dimension differences affect PCB design?

A: The Vishay MRS25 series components are slightly larger (0.098" Dia x 0.256" L) compared to the TE Connectivity LR1F6K81 (0.091" Dia x 0.244" L). PCB layouts with tight mechanical tolerances or space constraints require verification of clearance before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The LR1F6K81 and both Vishay substitute parts (MRS25000C6811FCT00 and MRS25000C6811FRP00) are RoHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing.

Q: What is the temperature coefficient specification and why is it important?

A: All parts specified have a temperature coefficient of ±50ppm/°C. This parameter defines the resistance change per degree Celsius across the operating temperature range. Matching this specification ensures consistent circuit performance across thermal variations from -55°C to 155°C.