LVR03R0400FE70 Equivalent & Substitute Parts

Part Overview

The LVR03R0400FE70 is a 40 mOhms ±1% 3W axial wirewound resistor manufactured by Vishay Dale, designed for current sense applications with moisture-resistant construction. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing procurement and system maintenance. The part operates across a wide temperature range of -65°C to 275°C and meets ROHS3 compliance requirements.

Substiute Parts

LVR03R0400FE70

Vishay DaleIn Stock: 1013LVR03R0400FE70 Datasheet

Current PartRFQ

MR3FT40L0

Stackpole Electronics IncIn Stock: 958MR3FT40L0 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LVR03R0400FE70 is determined by the following critical parameters:

• Resistance value: 40 mOhms
• Tolerance: ±1%
• Power rating: 3W
• Package configuration: Axial through-hole
• Physical dimensions: 0.205" Dia x 0.560" L (5.21mm x 14.22mm)
• Termination count: 2
• Current sense application capability
• Moisture resistance
• RoHS3 compliance

The MR3FT40L0 from Stackpole Electronics Inc meets all mandatory electrical and mechanical parameters required for direct substitution. While the composition differs (metal foil versus wirewound), both technologies deliver the specified resistance, tolerance, power rating, and package configuration. The substitute part maintains the same physical footprint and electrical performance envelope required for current sense applications.

Parameter Comparison

Engineering Selection Recommendations

The MR3FT40L0 is the qualified substitute for the LVR03R0400FE70. Selection is based on the following factors:

• Both parts meet identical electrical specifications: 40 mOhms resistance at ±1% tolerance with 3W power rating
• Physical package dimensions are identical, ensuring direct PCB compatibility without layout modifications
• Both components are ROHS3 compliant and suitable for current sense applications
• The MR3FT40L0 maintains active product status, ensuring long-term availability and supply chain continuity
• Operating temperature range of the substitute (-55°C ~ 275°C) covers the primary operational envelope, with the lower limit at -55°C versus -65°C for the original part
• Both parts feature moisture-resistant construction appropriate for demanding environments

Frequently Asked Questions (FAQ)

Q: Can the MR3FT40L0 be used as a direct replacement for the LVR03R0400FE70?

A: Yes. Both parts share identical resistance (40 mOhms), tolerance (±1%), power rating (3W), package type (axial), and physical dimensions (0.205" Dia x 0.560" L). They are electrically and mechanically interchangeable for current sense applications.

Q: What is the difference between wirewound and metal foil composition?

A: The LVR03R0400FE70 uses wirewound construction, while the MR3FT40L0 uses metal foil construction. Both technologies achieve the specified electrical performance. The metal foil composition of the substitute offers non-inductive and non-magnetic characteristics.

Q: Are there any temperature range limitations when substituting?

A: The MR3FT40L0 operates from -55°C to 275°C, compared to the original part's -65°C to 275°C range. For applications requiring operation below -55°C, the original specification must be verified against actual system requirements.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the LVR03R0400FE70 and MR3FT40L0 are ROHS3 compliant. The substitute part is REACH unaffected, providing additional regulatory coverage.

Q: What is the packaging difference between the two parts?

A: The original part is supplied in Cut Tape (CT) packaging, while the substitute is supplied in Tape & Reel (TR) packaging. Both are suitable for automated assembly processes, with TR packaging offering higher volume efficiency.

Q: Can the MR3FT40L0 handle the same current sense applications?

A: Yes. Both parts are specified for current sense applications and maintain moisture-resistant construction. The electrical performance and application suitability are equivalent.