81FR15 Equivalent & Substitute Parts

Part Overview

The 81FR15 is a 150 mOhms ±1% 1W through-hole resistor with axial wirewound construction, manufactured by Ohmite under the Acrasil® 80 series. This component is designed for applications requiring low-resistance precision wirewound elements with tight tolerance specifications. The part maintains active product status and is available in original inventory. Substitute parts are identified to provide alternative sourcing options while maintaining identical electrical and mechanical specifications.

Substiute Parts

81FR15

OhmiteIn Stock: 79881FR15 Datasheet

Current PartRFQ

41FR15E

OhmiteIn Stock: 91041FR15E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 41FR15E qualifies as a parametric equivalent to the 81FR15 based on the following criteria:

• Identical resistance value: 150 mOhms
• Matching tolerance: ±1%
• Equivalent power rating: 1W
• Same composition: Wirewound
• Identical package configuration: Axial
• Matching temperature coefficient: ±90ppm/°C
• Identical physical dimensions: 0.126" Dia x 0.437" L (3.20mm x 11.10mm)
• Same number of terminations: 2

Both parts are manufactured by Ohmite and maintain active product status. The primary difference lies in series designation (Acrasil® 80 versus Ohmicone® 40) and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both the 81FR15 and 41FR15E are electrically and mechanically interchangeable for applications requiring 150 mOhms ±1% 1W axial wirewound resistors. Selection between these parts should be based on regulatory and compliance requirements:

The 41FR15E is ROHS3 compliant, making it the appropriate choice for applications subject to RoHS regulations or customer specifications requiring RoHS compliance. The 81FR15, classified as RoHS non-compliant, is suitable for applications without RoHS mandates. Both parts carry identical electrical performance characteristics and physical form factors, ensuring direct substitution capability in circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the 41FR15E directly replace the 81FR15 in existing designs?

A: Yes. Both parts share identical electrical specifications (150 mOhms ±1% 1W), composition (wirewound), temperature coefficient (±90ppm/°C), and physical dimensions (0.126" Dia x 0.437" L). The axial package configuration and two-terminal design ensure mechanical compatibility in through-hole applications.

Q: What is the primary difference between these two parts?

A: The 41FR15E is ROHS3 compliant while the 81FR15 is RoHS non-compliant. Both parts belong to different Ohmite series (Ohmicone® 40 versus Acrasil® 80) but maintain identical performance parameters.

Q: Are there any dimensional differences between the 81FR15 and 41FR15E?

A: No. Both parts have identical physical dimensions of 0.126" diameter by 0.437" length (3.20mm x 11.10mm), ensuring equivalent PCB layout and mounting requirements.

Q: Which part should be selected for new designs?

A: Selection depends on regulatory requirements. For applications requiring RoHS compliance, specify the 41FR15E. For applications without RoHS mandates, either part is acceptable based on availability and sourcing preferences.

Q: Do these parts have different temperature operating ranges?

A: Operating temperature specifications are not provided in the technical data for either part. Both share an identical temperature coefficient of ±90ppm/°C.