LR1F40R2 Equivalent & Substitute Parts

Part Overview

The LR1F40R2 is a 40.2 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 applications requiring precision resistance values with tight tolerance specifications and moderate power dissipation capabilities. The part maintains Active product status with 659 pieces currently in stock. Substitute parts are identified to address inventory availability, supply chain continuity, or specific packaging requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

LR1F40R2

TE Connectivity Passive ProductIn Stock: 747LR1F40R2 Datasheet

Current PartRFQ

MRS25000C4029FCT00

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 15953MRS25000C4029FCT00 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LR1F40R2 is based on electrical parameter equivalence and mechanical compatibility. The following criteria determine valid substitutes:

Electrical Parameters (Must Match):

• Resistance value: 40.2 Ohms
• 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 or Exceed):

• RoHS3 Compliant status

The MRS25000C4029FCT00 from Vishay Beyschlag/Draloric/BC Components satisfies all electrical and mechanical requirements for direct substitution. Physical dimensions vary slightly between the main part and substitute, but both conform to standard axial resistor form factors compatible with through-hole PCB applications.

Parameter Comparison

Engineering Selection Recommendations

Both the LR1F40R2 and MRS25000C4029FCT00 are Active status products with ROHS3 compliance, ensuring regulatory alignment for current and future applications. The electrical specifications are identical across all critical parameters: resistance value, tolerance, power dissipation, temperature coefficient, and operating temperature range.

Selection between these parts should be based on:

1. Inventory Availability: The MRS25000C4029FCT00 has significantly higher stock levels (15,921 pieces) compared to the LR1F40R2 (659 pieces), making it suitable for high-volume production requirements.

2. Packaging Format: The LR1F40R2 is supplied in Tape & Box format, while the MRS25000C4029FCT00 is supplied in Cut Tape format. Packaging selection depends on assembly line automation capabilities and handling procedures.

3. Physical Dimensions: Minor dimensional variations exist between the two parts. The MRS25000C4029FCT00 has slightly larger diameter (0.098" vs 0.091") and length (0.256" vs 0.244"). These differences remain within standard axial resistor tolerances and do not affect PCB layout compatibility for typical through-hole applications.

4. Compliance Status: Both parts maintain ROHS3 compliance. The MRS25000C4029FCT00 carries REACH Unaffected status, while the LR1F40R2 shows Vendor Undefined REACH status.

Frequently Asked Questions (FAQ)

Q: Can the MRS25000C4029FCT00 be used as a direct replacement for the LR1F40R2 in existing designs?

A: Yes. Both parts have identical electrical specifications (40.2 Ohms ±1%, 0.6W, ±50ppm/°C, -55°C to 155°C operating range) and axial package configuration. The minor physical dimension differences do not affect through-hole PCB compatibility.

Q: What are the key differences between these two parts?

A: The primary differences are manufacturer (TE Connectivity vs Vishay), packaging format (Tape & Box vs Cut Tape), physical dimensions (0.091" x 0.244" vs 0.098" x 0.256"), and inventory availability. All electrical parameters are identical.

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant and Active status. The MRS25000C4029FCT00 has REACH Unaffected designation, while the LR1F40R2 shows Vendor Undefined REACH status. Both carry EAR99 ECCN classification.

Q: Which part should be selected for new designs?

A: Selection depends on supply chain strategy and packaging requirements. For applications requiring immediate availability or high-volume production, the MRS25000C4029FCT00 is preferable due to higher stock levels. For existing designs using TE Connectivity components, the LR1F40R2 maintains manufacturer consistency.

Q: Do the dimensional differences affect PCB layout?

A: No. Both parts conform to standard axial resistor form factors. The dimensional variations (approximately 0.007" diameter and 0.012" length differences) are within normal manufacturing tolerances and do not impact through-hole spacing or PCB design requirements.

Q: What is the temperature coefficient significance?

A: Both parts have identical ±50ppm/°C temperature coefficient, ensuring equivalent resistance stability across the -55°C to 155°C operating range. This specification is critical for precision applications requiring stable resistance values under temperature variation.