Ohmite 41F12R Equivalent & Substitute Parts

Part Overview

The Ohmite 41F12R is a 12 Ohm ±1% 1W through-hole axial wirewound resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision resistance with wirewound construction and is currently in active production status. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or when design requirements permit alternative manufacturers meeting identical or compatible electrical and mechanical specifications.

Substiute Parts

41F12R

OhmiteIn Stock: 74841F12R Datasheet

Current PartRFQ

ALSR0112R00FE12

Vishay DaleIn Stock: 2081ALSR0112R00FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Ohmite 41F12R is determined by the following critical parameters:

• Resistance Value: 12 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)
• Termination Count: 2 (exact match required)

The Vishay Dale ALSR0112R00FE12 meets all mandatory electrical and mechanical substitution criteria. Both components are wirewound axial resistors with identical resistance, tolerance, and power specifications. Physical dimensions vary slightly (Vishay Dale: 0.110" Dia × 0.406" L versus Ohmite: 0.126" Dia × 0.437" L), which remains within acceptable tolerance for standard through-hole PCB mounting applications.

Parameter Comparison

Engineering Selection Recommendations

Both the Ohmite 41F12R and Vishay Dale ALSR0112R00FE12 are active production components suitable for direct substitution based on electrical specifications. The Vishay Dale ALSR0112R00FE12 offers ROHS3 compliance and moisture-resistant construction, providing additional environmental protection. The Ohmite 41F12R maintains a tighter temperature coefficient specification (±20ppm/°C versus ±30ppm/°C), which may be relevant for precision applications with strict thermal stability requirements. Physical dimension differences are minor and do not impact standard through-hole PCB layouts. Component selection should be based on supply availability, compliance requirements, and specific application thermal performance criteria.

Frequently Asked Questions (FAQ)

Q: Can the Vishay Dale ALSR0112R00FE12 directly replace the Ohmite 41F12R?

A: Yes. Both components share identical resistance (12 Ohms), tolerance (±1%), power rating (1W), composition (wirewound), and package type (axial). Physical dimensions differ slightly but remain compatible with standard through-hole mounting.

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

A: The Ohmite 41F12R specifies ±20ppm/°C while the Vishay Dale ALSR0112R00FE12 specifies ±30ppm/°C. For applications requiring minimal resistance drift across temperature ranges, the Ohmite component provides superior stability. For general-purpose applications, both specifications are acceptable.

Q: Does the RoHS compliance difference affect substitution?

A: RoHS compliance is a regulatory and supply chain consideration. The Vishay Dale ALSR0112R00FE12 is ROHS3 compliant, while the Ohmite 41F12R is non-compliant. Selection depends on end-product regulatory requirements and customer specifications.

Q: Are the physical dimension differences critical?

A: The Vishay Dale component is slightly smaller (0.110" Dia × 0.406" L versus 0.126" Dia × 0.437" L). Both fit standard through-hole PCB layouts. Verify clearance in space-constrained applications.

Q: What does "moisture resistant" mean for the Vishay Dale part?

A: The Vishay Dale ALSR0112R00FE12 includes moisture-resistant construction and carries MSL rating 1 (Unlimited), indicating enhanced protection against humidity exposure during storage and handling compared to standard wirewound resistors.