Equivalent & Substitute Parts for Ohmite 41F180

Part Overview

The Ohmite 41F180 is a 180 Ohms ±1% 1W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is actively manufactured and widely used in applications requiring precision resistive elements with wirewound reliability. Substitute parts are identified to provide alternative sourcing options when the primary part number becomes unavailable or when specific compliance requirements necessitate alternative selections.

Substiute Parts

41F180

OhmiteIn Stock: 91241F180 Datasheet

Current PartRFQ

41F180E

OhmiteIn Stock: 141441F180E Datasheet

DirectRFQ

ALSR01180R0FE12

Vishay DaleIn Stock: 2056ALSR01180R0FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 41F180 is determined by the following core parameters:

• Resistance value: 180 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 1W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial through-hole (exact match required)
• Termination count: 2 (exact match required)

The identified substitute parts meet all mandatory electrical and mechanical parameters. Variations in temperature coefficient, physical dimensions within tolerance, and compliance certifications do not affect functional substitutability for this resistor category.

Parameter Comparison

Engineering Selection Recommendations

All three parts are actively manufactured and meet the core electrical specifications for 180 Ohms ±1% 1W axial wirewound resistor applications.

The 41F180E is an Ohmite product with identical electrical characteristics and physical dimensions to the primary 41F180, with the distinction of ROHS3 compliance. This part is suitable for applications requiring RoHS compliance.

The ALSR01180R0FE12 from Vishay Dale meets all electrical requirements and is ROHS3 compliant. This part features moisture-resistant construction and a slightly smaller physical footprint (0.110" Dia x 0.406" L versus 0.126" Dia x 0.437" L). The temperature coefficient is ±30ppm/°C compared to ±20ppm/°C for the Ohmite variants. Physical dimensions must be verified for PCB layout compatibility in space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can the 41F180E be used as a direct replacement for the 41F180?

A: Yes. The 41F180E is electrically and mechanically identical to the 41F180, with identical resistance, tolerance, power rating, temperature coefficient, and physical dimensions. The primary difference is RoHS3 compliance status.

Q: Is the ALSR01180R0FE12 compatible with the 41F180 in all applications?

A: The ALSR01180R0FE12 meets all core electrical specifications (180 Ohms ±1%, 1W, wirewound, axial). However, the physical dimensions differ: 0.110" Dia x 0.406" L versus 0.126" Dia x 0.437" L. PCB layout and mechanical clearance must be verified before substitution.

Q: What is the significance of the temperature coefficient difference?

A: The 41F180 and 41F180E have a temperature coefficient of ±20ppm/°C, while the ALSR01180R0FE12 has ±30ppm/°C. For applications operating across wide temperature ranges, the lower temperature coefficient of the Ohmite parts provides greater resistance stability. For most general-purpose applications, both values are acceptable.

Q: Does RoHS compliance affect electrical performance?

A: No. RoHS compliance relates to material composition and environmental regulations, not electrical performance. All three parts deliver identical electrical characteristics within their specified tolerances.

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

A: The 41F180 and 41F180E can be used interchangeably due to identical physical dimensions. The ALSR01180R0FE12 has a smaller footprint and must be evaluated for PCB layout compatibility, including lead hole spacing and component clearance.