LR1F18R Equivalent & Substitute Parts

Part Overview

The LR1F18R is an 18 Ohms ±1% 0.6W through-hole resistor manufactured by TE Connectivity Passive Product in the Neohm series. This axial metal film resistor is designed for general-purpose applications requiring precision resistance values with tight tolerance specifications. The part is currently in active production status with 947 pieces available in inventory. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to supply constraints, procurement preferences, or design flexibility needs.

Substiute Parts

LR1F18R

TE Connectivity Passive ProductIn Stock: 1034LR1F18R Datasheet

Current PartRFQ

MRS25000C1809FCT00

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 12864MRS25000C1809FCT00 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LR1F18R are identified based on strict equivalence across all critical electrical and mechanical parameters. The substitution logic requires that alternative parts maintain identical specifications in the following categories:

Electrical Parameters (Must Match Exactly):

• Resistance value: 18 Ohms
• Tolerance: ±1%
• Power rating: 0.6W
• Composition: Metal Film
• Temperature coefficient: ±50ppm/°C
• Operating temperature range: -55°C ~ 155°C

Mechanical Parameters (Must Match Exactly):

• Package type: Axial
• Number of terminations: 2

Compliance Parameters (Must Match Exactly):

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

Parts meeting all these criteria are classified as direct substitutes. Packaging format (Tape & Box versus Cut Tape) does not affect electrical or mechanical compatibility and represents a procurement variation only.

Parameter Comparison

Engineering Selection Recommendations

The MRS25000C1809FCT00 manufactured by Vishay Beyschlag/Draloric/BC Components is a direct electrical and mechanical equivalent to the LR1F18R. Both parts are active production items with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements.

Selection between these parts should be based on:

1. Availability and Lead Time: MRS25000C1809FCT00 has 12,825 pieces in inventory compared to 947 pieces for LR1F18R, providing greater supply availability.

2. Packaging Requirements: LR1F18R is supplied in Tape & Box format, while MRS25000C1809FCT00 is supplied in Cut Tape format. Packaging selection depends on assembly process requirements and handling procedures.

3. Physical Dimensions: Minor dimensional variations exist between the two parts. The MRS25000C1809FCT00 has a slightly larger diameter (0.098" versus 0.091") and length (0.256" versus 0.244"). These variations are within typical manufacturing tolerances for axial resistors and do not affect electrical performance or standard PCB footprint compatibility.

4. Regulatory Compliance: Both parts meet identical compliance standards and are suitable for applications requiring ROHS3 and REACH compliance.

Frequently Asked Questions (FAQ)

Q: Can MRS25000C1809FCT00 be used as a direct replacement for LR1F18R in existing designs?

A: Yes. The MRS25000C1809FCT00 meets all electrical specifications (18 Ohms ±1%, 0.6W, ±50ppm/°C, -55°C ~ 155°C operating range) and mechanical requirements (axial package, 2 terminations) of the LR1F18R. Both parts are metal film composition with identical tolerance and temperature characteristics.

Q: Are there any physical compatibility concerns with the dimensional differences?

A: The dimensional variations between LR1F18R (2.30mm x 6.20mm) and MRS25000C1809FCT00 (2.50mm x 6.50mm) are minor and within standard axial resistor manufacturing tolerances. These differences do not affect PCB footprint compatibility or standard through-hole mounting procedures.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both LR1F18R and MRS25000C1809FCT00 are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic components.

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

A: Tape & Box (TB) packaging supplies components on tape wound in a box, suitable for manual handling and smaller production runs. Cut Tape (CT) packaging supplies individual components cut from tape, suitable for automated assembly equipment. The packaging format does not affect component electrical or mechanical performance.

Q: Are there any temperature or environmental performance differences between these parts?

A: No. Both parts operate across the identical temperature range (-55°C ~ 155°C) and share the same temperature coefficient (±50ppm/°C), ensuring equivalent performance across all environmental conditions.