Ohmite 81F1R0 Equivalent & Substitute Parts

Part Overview

The Ohmite 81F1R0 is a 1 Ohm ±1% 1W axial wirewound through-hole resistor from the Acrasil® 80 series. This component is currently active in production with 938 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable or when alternative packaging or compliance requirements necessitate component substitution.

Substiute Parts

81F1R0

OhmiteIn Stock: 97181F1R0 Datasheet

Current PartRFQ

41F1R0E

OhmiteIn Stock: 191941F1R0E Datasheet

Parametric EquivalentRFQ

RS01A1R000FS70

Vishay DaleIn Stock: 2134RS01A1R000FS70 Datasheet

MFR RecommendedRFQ

41F1R0

OhmiteIn Stock: 112041F1R0 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 81F1R0 are qualified based on the following electrical and mechanical parameters:

• Resistance value: 1 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 1W (exact match required)
• Composition: Wirewound (exact match required)
• Package type: Axial (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Termination count: 2 (exact match required)

All identified substitutes meet these core parameters and are therefore electrically and mechanically compatible with the 81F1R0 in applications requiring these specifications.

Parameter Comparison

Engineering Selection Recommendations

41F1R0E (Ohmite): This substitute is electrically and mechanically identical to the 81F1R0 with identical physical dimensions. The 41F1R0E offers ROHS3 compliance, making it suitable for applications with RoHS requirements. Packaging is provided in bulk format.

RS01A1R000FS70 (Vishay Dale): This substitute meets all core electrical parameters and is manufacturer-recommended. It features moisture-resistant construction and an extended operating temperature range of -65°C to 250°C. Physical dimensions are slightly smaller (0.094" Dia x 0.406" L versus 0.126" Dia x 0.437" L). Packaging is provided in cut tape format. REACH status is affected, requiring verification for regulated applications.

41F1R0 (Ohmite): This substitute is electrically and mechanically identical to the 81F1R0 with identical physical dimensions. Packaging is provided in bulk format. Product status is active with 1044 units in stock.

Frequently Asked Questions (FAQ)

Q: Can the 41F1R0E be used as a direct replacement for the 81F1R0?

A: Yes. The 41F1R0E is electrically and mechanically equivalent with identical resistance, tolerance, power rating, temperature coefficient, and physical dimensions. The primary difference is RoHS3 compliance status. Selection depends on regulatory requirements for your application.

Q: What is the key difference between the RS01A1R000FS70 and other substitutes?

A: The RS01A1R000FS70 has a smaller physical diameter (0.094" versus 0.126") and length (0.406" versus 0.437"), includes moisture-resistant construction, and provides an extended operating temperature range of -65°C to 250°C. These differences may affect PCB layout and environmental performance considerations.

Q: Are all substitutes available in the same packaging format?

A: No. The 81F1R0 packaging is not specified. The 41F1R0E and 41F1R0 are supplied in bulk packaging, while the RS01A1R000FS70 is supplied in cut tape format. Packaging selection affects procurement and assembly processes.

Q: Which substitute should I select for RoHS-compliant applications?

A: The 41F1R0E is ROHS3 compliant and is the appropriate selection for applications requiring RoHS compliance.

Q: Does the RS01A1R000FS70 require REACH verification?

A: Yes. The RS01A1R000FS70 has REACH Affected status, requiring verification against your application's regulatory requirements. The 81F1R0, 41F1R0E, and 41F1R0 have REACH Unaffected or REACH Unaffected status.