Equivalent & Substitute Parts for Ohmite 41F125

Part Overview

The Ohmite 41F125 is a 125 Ohm, 1% tolerance, 1W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is classified as Active product status and is suitable for general-purpose resistive applications requiring precision and power dissipation in compact form factors. Substitute parts are identified to address packaging variations, compliance requirements, and inventory availability while maintaining electrical and mechanical compatibility.

Substiute Parts

41F125

OhmiteIn Stock: 113541F125 Datasheet

Current PartRFQ

41F125E

OhmiteIn Stock: 75141F125E Datasheet

DirectRFQ

ALSR01125R0FE12

Vishay DaleIn Stock: 724ALSR01125R0FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Ohmite 41F125 is determined by the following criteria:

• Resistance Value: Must be 125 Ohms
• Tolerance: Must be ±1%
• Power Rating: Must be 1W
• Composition: Must be Wirewound
• Package Type: Must be Axial with 2 terminations
• Electrical Performance: Temperature coefficient and operating temperature range may vary within acceptable engineering margins

The identified substitutes meet all primary electrical and mechanical parameters. Variations in packaging designation (Bulk vs. standard), RoHS compliance status, and physical dimensions (within axial form factor) do not preclude functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Ohmite 41F125: Select this part for applications where RoHS non-compliance is acceptable and the original specification is required. Product status is Active with 1046 units in stock.

Ohmite 41F125E: This substitute is the direct equivalent from Ohmite with identical electrical specifications and physical dimensions. The primary distinction is ROHS3 compliance and Bulk packaging. Select this part for RoHS-compliant applications requiring the same thermal and electrical performance. Product status is Active with 696 units in stock.

Vishay Dale ALSR01125R0FE12: This substitute meets all core electrical parameters with ROHS3 compliance and moisture-resistant construction. The temperature coefficient is ±30ppm/°C (compared to ±20ppm/°C for Ohmite variants) and physical dimensions are slightly smaller. Select this part for applications requiring moisture resistance, RoHS compliance, and extended operating temperature range (-65°C ~ 250°C). Product status is Active with 697 units in stock.

Frequently Asked Questions (FAQ)

Q: Can the 41F125E be used as a direct replacement for the 41F125?

A: Yes. The 41F125E is electrically and mechanically identical to the 41F125, with identical resistance, tolerance, power rating, temperature coefficient, and physical dimensions. The primary difference is RoHS3 compliance and packaging designation.

Q: What is the key difference between the Ohmite and Vishay Dale substitutes?

A: The Vishay Dale ALSR01125R0FE12 offers moisture-resistant construction, ROHS3 compliance, and an extended operating temperature range (-65°C ~ 250°C). The temperature coefficient is ±30ppm/°C versus ±20ppm/°C for Ohmite parts. Physical dimensions are slightly smaller (0.110" Dia x 0.406" L vs. 0.126" Dia x 0.437" L).

Q: Are all substitutes suitable for PCB board layouts designed for the original 41F125?

A: The Ohmite 41F125E is dimensionally identical and suitable for existing layouts. The Vishay Dale ALSR01125R0FE12 has smaller physical dimensions and may require layout verification for tight spacing applications, though the axial package type remains compatible.

Q: Does RoHS compliance affect electrical performance?

A: No. RoHS compliance is a material composition and manufacturing standard that does not alter the electrical specifications of the resistor. All three parts deliver identical resistance, tolerance, and power rating performance.

Q: Which substitute should be selected for new designs?

A: Selection depends on application requirements. For RoHS-compliant designs without moisture sensitivity concerns, the 41F125E is recommended. For applications requiring moisture resistance and extended temperature operation, the ALSR01125R0FE12 is appropriate.