Ohmite 40FR10 Equivalent & Substitute Parts

Part Overview

The Ohmite 40FR10 is a 100 mOhms ±1% 10W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is classified as Active product status. Substitute parts are identified when original inventory becomes unavailable, when alternative packaging formats are required, or when compliance certifications differ from the primary specification.

Key Parameters

Parameter	Value
Resistance	100 mOhms
Tolerance	±1%
Power Rating	10W
Composition	Wirewound
Package Type	Axial
Temperature Coefficient	±90ppm/°C
Terminations	2
Physical Dimensions	0.406" Dia x 1.902" L (10.30mm x 48.30mm)

Substitute Part Grouping Explanation

Substitution eligibility for the 40FR10 is determined by matching the following critical parameters: resistance value (100 mOhms), tolerance (±1%), power rating (10W), composition (wirewound), package type (axial), and temperature coefficient (±90ppm/°C). All identified substitutes maintain these core electrical and mechanical specifications. Variations in packaging format (bulk versus standard), physical length dimensions, series designation, and compliance certifications do not affect functional interchangeability within the specified parameter set.

Parameter Comparison

Parameter	40FR10	40FR10E	80FR10
Manufacturer	Ohmite	Ohmite	Ohmite
Resistance	100 mOhms	100 mOhms	100 mOhms
Tolerance	±1%	±1%	±1%
Power Rating	10W	10W	10W
Composition	Wirewound	Wirewound	Wirewound
Temperature Coefficient	±90ppm/°C	±90ppm/°C	±90ppm/°C
Package Type	Axial	Axial	Axial
Terminations	2	2	2
Physical Dimensions	0.406" Dia x 1.902" L (10.30mm x 48.30mm)	0.406" Dia x 1.902" L (10.30mm x 48.30mm)	0.406" Dia x 1.843" L (10.30mm x 46.80mm)
Series	Ohmicone® 40	40	Acrasil® 80
Product Status	Active	Active	Active
RoHS Status	RoHS non-compliant	RoHS Compliant	RoHS non-compliant
Packaging Format	Standard	Bulk	Bulk
Inventory Status	906 Pcs New Original In Stock	1396 Pcs New Original In Stock	1233 Pcs New Original In Stock

Engineering Selection Recommendations

The 40FR10E serves as the primary parametric equivalent, offering identical electrical specifications with RoHS Compliant certification and bulk packaging availability. This part is suitable for applications requiring environmental compliance documentation.

The 80FR10 is classified as manufacturer-recommended and maintains all core electrical parameters. Physical length differs by 0.059" (1.50mm), which may affect board layout considerations in space-constrained applications. This part retains RoHS non-compliant status consistent with the original 40FR10.

Selection between substitutes should be based on compliance requirements, packaging format needs, and physical space constraints within the target application.

Frequently Asked Questions (FAQ)

Q: Are the 40FR10, 40FR10E, and 80FR10 electrically interchangeable?

A: Yes. All three parts share identical resistance (100 mOhms), tolerance (±1%), power rating (10W), temperature coefficient (±90ppm/°C), and wirewound composition specifications.

Q: What is the primary difference between 40FR10 and 40FR10E?

A: The 40FR10E is RoHS Compliant with bulk packaging, while the 40FR10 is RoHS non-compliant with standard packaging. Electrical performance is identical.

Q: Does the physical length difference between 40FR10 and 80FR10 affect compatibility?

A: The 80FR10 is 0.059" (1.50mm) shorter. This dimensional variation may impact board layout and mounting clearances. Verify available space before substitution.

Q: Which substitute should be selected for RoHS-compliant applications?

A: The 40FR10E is the only RoHS Compliant option among the three parts.

Q: Are all parts available in bulk packaging?

A: The 40FR10E and 80FR10 are supplied in bulk packaging. The 40FR10 uses standard packaging format.

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