43FR10 Equivalent & Substitute Parts

Part Overview

The 43FR10 is a 100 mOhms ±1% 3W through-hole resistor in axial wirewound composition, manufactured by Ohmite as part of the Ohmicone® 40 series. This component is currently active in production and widely used in applications requiring precision low-resistance dissipation. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits alternative sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

43FR10

OhmiteIn Stock: 107543FR10 Datasheet

Current PartRFQ

43FR10E

OhmiteIn Stock: 2463243FR10E Datasheet

DirectRFQ

ALSR03R1000FE12

Vishay DaleIn Stock: 5697ALSR03R1000FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 43FR10 is determined by strict equivalence across the following critical parameters:

• Resistance value: 100 mOhms
• Tolerance: ±1%
• Power dissipation: 3W
• Composition: Wirewound
• Package configuration: Axial through-hole
• Termination count: 2

All identified substitute parts meet these core electrical and mechanical requirements. Variations in packaging format (tape and reel versus bulk), physical dimensions, temperature coefficient specifications, and compliance certifications do not preclude substitution when the above parameters are matched.

Parameter Comparison

Engineering Selection Recommendations

All three parts—43FR10, 43FR10E, and ALSR03R1000FE12—are active production components with identical electrical specifications. Selection between them is determined by compliance requirements and packaging needs.

The 43FR10E is a direct equivalent manufactured by Ohmite with identical physical dimensions and electrical characteristics. It differs from the 43FR10 only in packaging format (bulk versus tape and reel) and RoHS3 compliance status. For applications requiring RoHS3 compliance, the 43FR10E is the preferred choice within the Ohmite product line.

The ALSR03R1000FE12 from Vishay Dale meets all core electrical requirements and achieves RoHS3 compliance. Its smaller physical dimensions (0.180" diameter versus 0.220") may present layout advantages in space-constrained applications. The moisture-resistant feature provides additional environmental protection. Temperature coefficient data is not provided for this part; applications with strict temperature stability requirements should reference the manufacturer's detailed specifications.

Frequently Asked Questions (FAQ)

Q: Can 43FR10E be used as a direct replacement for 43FR10?

A: Yes. Both parts are manufactured by Ohmite with identical resistance (100 mOhms), tolerance (±1%), power rating (3W), composition (wirewound), and physical dimensions. The primary difference is packaging format and RoHS3 compliance status of the 43FR10E.

Q: What are the physical dimension differences between these parts?

A: The 43FR10 and 43FR10E share identical dimensions: 0.220" diameter × 0.594" length (5.60mm × 15.10mm). The ALSR03R1000FE12 is smaller at 0.180" diameter × 0.500" length (4.57mm × 12.70mm). Verify PCB layout compatibility before substituting with the Vishay Dale part.

Q: Are there compliance differences between these parts?

A: The 43FR10 is RoHS non-compliant. Both 43FR10E and ALSR03R1000FE12 are ROHS3 compliant. For applications subject to RoHS regulations, either the 43FR10E or ALSR03R1000FE12 is required.

Q: Does the ALSR03R1000FE12 moisture-resistant feature affect substitution?

A: The moisture-resistant feature is an additional capability that does not prevent substitution. It provides enhanced environmental protection in humid or corrosive conditions without altering the core electrical performance.

Q: What should be verified before substituting with ALSR03R1000FE12?

A: Verify PCB layout compatibility due to smaller physical dimensions. Confirm that the absence of specified temperature coefficient data does not conflict with application requirements. Validate REACH compliance status with the supplier if required by your supply chain.