81F15R Equivalent & Substitute Parts

Part Overview

The Ohmite 81F15R is a 15 Ohm ±1% 1W axial wirewound through-hole resistor from the Acrasil® 80 series. This component is currently active in production with 828 units in stock. Wirewound resistors of this specification are used in precision current-limiting, load balancing, and measurement applications where tight tolerance and stable performance are required. Alternative equivalent parts may be necessary due to packaging preferences, compliance requirements, or supply chain considerations.

Substiute Parts

81F15R

OhmiteIn Stock: 84581F15R Datasheet

Current PartRFQ

41F15RE

OhmiteIn Stock: 87941F15RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Ohmite 41F15RE qualifies as a parametric equivalent to the 81F15R based on the following matching electrical and mechanical specifications:

• Resistance value: 15 Ohms (identical)
• Tolerance: ±1% (identical)
• Power rating: 1W (identical)
• Composition: Wirewound (identical)
• Package: Axial (identical)
• Temperature coefficient: ±20ppm/°C (identical)
• Physical dimensions: 0.126" Dia x 0.437" L / 3.20mm x 11.10mm (identical)
• Number of terminations: 2 (identical)

These parameters define the functional and mechanical interchangeability of the substitute part. The 41F15RE operates within the same electrical performance envelope and occupies the same physical footprint as the 81F15R.

Parameter Comparison

Engineering Selection Recommendations

Both the 81F15R and 41F15RE are active production components from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on compliance and supply requirements:

The 41F15RE is RoHS Compliant and suitable for applications subject to RoHS directives. The 81F15R is RoHS non-compliant and appropriate for applications without RoHS requirements or legacy systems. The 41F15RE provides a documented operating temperature range of -55°C to 275°C, while the 81F15R does not specify this parameter. Both parts are available in adequate inventory quantities.

Frequently Asked Questions (FAQ)

Q: Are the 81F15R and 41F15RE electrically interchangeable?

A: Yes. Both parts have identical resistance (15 Ohms), tolerance (±1%), power rating (1W), composition (wirewound), and temperature coefficient (±20ppm/°C). They will perform identically in circuit applications.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. Both parts share identical physical dimensions (0.126" Dia x 0.437" L / 3.20mm x 11.10mm) and axial package configuration. They occupy the same footprint and mount identically.

Q: What is the difference between the 81F15R and 41F15RE?

A: The primary differences are series designation (Acrasil® 80 versus 40), RoHS compliance status (non-compliant versus compliant), and documented operating temperature range (not specified versus -55°C ~ 275°C). Electrical and mechanical performance are identical.

Q: Which part should I select for RoHS-regulated applications?

A: The 41F15RE is RoHS Compliant and must be used for applications subject to RoHS directives. The 81F15R is RoHS non-compliant.

Q: Are there packaging differences between these parts?

A: The 81F15R packaging is not specified. The 41F15RE is supplied in Bulk packaging. Both are axial wirewound resistors with identical physical form factors.