LR1F18K2 Equivalent & Substitute Parts

Part Overview

The LR1F18K2 is an 18.2 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 currently active in production. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when procurement requirements necessitate alternative manufacturers or packaging configurations.

Substiute Parts

LR1F18K2

TE Connectivity Passive ProductIn Stock: 759LR1F18K2 Datasheet

Current PartRFQ

MRS25000C1822FCT00

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 2560MRS25000C1822FCT00 Datasheet

DirectRFQ

MRS25000C1822FRP00

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 13937MRS25000C1822FRP00 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LR1F18K2 is determined by electrical and mechanical parameter equivalence. The following criteria establish valid substitution:

Electrical Parameters (Critical):

• Resistance value: 18.2 kOhms
• Tolerance: ±1%
• Power rating: 0.6W
• Temperature coefficient: ±50ppm/°C
• Operating temperature range: -55°C to 155°C

Mechanical Parameters (Critical):

• Package type: Axial
• Composition: Metal Film
• Number of terminations: 2

Compliance Parameters:

• RoHS3 compliance required

The substitute parts MRS25000C1822FCT00 and MRS25000C1822FRP00 (both Vishay Beyschlag/Draloric/BC Components, MRS25 series) satisfy all electrical and mechanical equivalence criteria. Both parts maintain identical resistance, tolerance, power rating, temperature coefficient, and operating temperature specifications. Physical dimensions differ slightly (0.098" Dia x 0.256" L versus 0.091" Dia x 0.244" L), which is acceptable within standard axial resistor form factor tolerances. Both substitute parts are ROHS3 compliant and active in production.

Parameter Comparison

Engineering Selection Recommendations

Both MRS25000C1822FCT00 and MRS25000C1822FRP00 are electrically and mechanically equivalent to the LR1F18K2 and are suitable for direct substitution in applications requiring an 18.2 kOhms ±1% 0.6W axial metal film resistor.

MRS25000C1822FCT00 is available in Cut Tape packaging with 2536 pieces in stock inventory.

MRS25000C1822FRP00 is available in Cut Tape packaging with 13894 pieces in stock inventory.

Both substitute parts maintain full ROHS3 compliance and are classified as active products. Selection between the two Vishay alternatives should be based on packaging requirements and inventory availability. The slight dimensional variation between the primary part and substitutes (approximately 0.007" diameter and 0.012" length difference) falls within acceptable tolerances for standard through-hole axial resistor applications and does not impact electrical performance or board-level compatibility.

Frequently Asked Questions (FAQ)

Q: Can MRS25000C1822FCT00 and MRS25000C1822FRP00 be used interchangeably with LR1F18K2?

A: Yes. Both Vishay parts are electrically and mechanically equivalent. They provide identical resistance, tolerance, power rating, temperature coefficient, and operating temperature specifications. The primary difference is packaging format (Cut Tape versus Tape & Box) and physical dimensions within acceptable tolerances.

Q: What is the difference between MRS25000C1822FCT00 and MRS25000C1822FRP00?

A: Both parts are identical in electrical specifications and physical dimensions. The difference lies in packaging format designation and inventory availability. MRS25000C1822FRP00 has significantly higher stock availability (13894 pieces versus 2536 pieces).

Q: Are there dimensional compatibility concerns when substituting the LR1F18K2?

A: The substitute parts are slightly larger (0.098" diameter and 0.256" length versus 0.091" diameter and 0.244" length). This dimensional difference is within standard axial resistor form factor tolerances and does not affect board-level compatibility or electrical performance in standard through-hole applications.

Q: Do the substitute parts maintain the same compliance certifications?

A: Yes. Both MRS25000C1822FCT00 and MRS25000C1822FRP00 are ROHS3 compliant, matching the compliance status of the LR1F18K2. Both parts are classified as active products in current production.

Q: What packaging formats are available for these substitute parts?

A: The LR1F18K2 is supplied in Tape & Box format. The substitute parts MRS25000C1822FCT00 and MRS25000C1822FRP00 are supplied in Cut Tape format. Selection should account for assembly line requirements and tape reel compatibility.