LR1F8K66 Equivalent & Substitute Parts

Part Overview

The LR1F8K66 is an 8.66 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

LR1F8K66

TE Connectivity Passive ProductIn Stock: 1227LR1F8K66 Datasheet

Current PartRFQ

MRS25000C8661FCT00

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 2812MRS25000C8661FCT00 Datasheet

DirectRFQ

MRS25000C8661FRP00

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 22300MRS25000C8661FRP00 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LR1F8K66 are qualified based on strict electrical and mechanical parameter alignment. The following criteria determine substitution eligibility:

Electrical Parameters (Must Match):

• Resistance value: 8.66 kOhms
• Tolerance: ±1%
• Power rating: 0.6W
• Temperature coefficient: ±50ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Composition: Metal Film

Mechanical Parameters (Must Match):

• Package type: Axial
• Number of terminations: 2

Compliance Parameters (Must Match):

• RoHS3 compliance
• ECCN classification: EAR99

The substitute parts MRS25000C8661FRP00 and MRS25000C8661FCT00 from Vishay Beyschlag/Draloric/BC Components meet all electrical and mechanical requirements. Physical dimensions vary slightly between the main part and substitutes; however, both configurations are compatible with standard through-hole PCB layouts for axial resistors.

Parameter Comparison

Engineering Selection Recommendations

All three parts—LR1F8K66, MRS25000C8661FRP00, and MRS25000C8661FCT00—are Active product status components with full RoHS3 compliance and EAR99 export classification. Selection between these parts is determined by packaging requirements and inventory availability.

LR1F8K66 (TE Connectivity): Primary choice when Tape & Box packaging is required. 1,156 units in stock.

MRS25000C8661FRP00 (Vishay): Substitute option with Cut Tape packaging. 22,271 units in stock. Highest inventory availability.

MRS25000C8661FCT00 (Vishay): Substitute option with Cut Tape packaging. 2,800 units in stock.

All three parts satisfy identical electrical specifications and operating conditions. Physical dimension differences (0.091" Dia x 0.244" L for LR1F8K66 versus 0.098" Dia x 0.256" L for Vishay parts) do not affect functional compatibility in standard through-hole PCB applications.

Frequently Asked Questions (FAQ)

Q: Can MRS25000C8661FRP00 or MRS25000C8661FCT00 be used as direct replacements for LR1F8K66?

A: Yes. Both Vishay parts meet all electrical parameters (8.66 kOhms ±1%, 0.6W, ±50ppm/°C, -55°C to 155°C) and mechanical requirements (axial package, 2 terminations). Packaging format differs (Cut Tape versus Tape & Box), but electrical and thermal performance are identical.

Q: What is the difference between MRS25000C8661FRP00 and MRS25000C8661FCT00?

A: Both parts are electrically and mechanically identical. The difference is in packaging format designation (FRP00 versus FCT00). Both are supplied in Cut Tape format. Selection depends on procurement and assembly requirements.

Q: Are there physical dimension compatibility concerns?

A: The LR1F8K66 measures 0.091" Dia x 0.244" L, while Vishay substitutes measure 0.098" Dia x 0.256" L. These minor differences are within standard tolerances for axial through-hole resistors and do not affect PCB layout compatibility or mounting.

Q: Do all parts have the same compliance certifications?

A: Yes. All three parts are RoHS3 compliant, classified as EAR99 for export control, and carry Active product status. REACH status differs (TE Connectivity: Vendor Undefined; Vishay: REACH Unaffected), but both satisfy regulatory requirements.

Q: Which part should be selected for new designs?

A: Selection is based on packaging preference and supply chain requirements. All three parts are functionally equivalent. MRS25000C8661FRP00 offers the highest inventory availability (22,271 units).