Ohmite 41F100 Equivalent & Substitute Parts

Part Overview

The Ohmite 41F100 is a 100 Ohm ±1% 1W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production with 795 units in stock. Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating, temperature coefficient) and mechanical compatibility (axial package, through-hole termination). Alternative models may be required due to inventory availability, compliance requirements, or specific application constraints.

Substiute Parts

41F100

OhmiteIn Stock: 80741F100 Datasheet

Current PartRFQ

41F100E

OhmiteIn Stock: 95441F100E Datasheet

DirectRFQ

ALSR01100R0FE12

Vishay DaleIn Stock: 1401ALSR01100R0FE12 Datasheet

DirectRFQ

RS01A100R0FS70

Vishay DaleIn Stock: 1565RS01A100R0FS70 Datasheet

MFR RecommendedRFQ

81F100

OhmiteIn Stock: 118681F100 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 41F100 are classified based on electrical parameter matching and mechanical compatibility:

Direct Manufacturer Equivalent (41F100E): Identical electrical specifications and package dimensions from the same manufacturer (Ohmite). Differs in RoHS compliance status and operating temperature range specification.

Cross-Manufacturer Equivalents (ALSR01100R0FE12, RS01A100R0FS70): Vishay Dale parts matching core electrical parameters (100 Ohms, ±1%, 1W, wirewound, axial package). Both feature moisture-resistant construction. Dimensional variations exist within acceptable through-hole compatibility ranges. Temperature coefficient and operating temperature ranges differ slightly.

Parametric Equivalent (81F100): Ohmite part from the Acrasil® 80 series with identical electrical specifications and package dimensions. Represents an alternative within the same manufacturer's product portfolio.

Substitution eligibility is determined by:

• Resistance value: 100 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 1W (exact match required)
• Package: Axial through-hole (exact match required)
• Temperature coefficient: ±20ppm/°C or ±30ppm/°C (acceptable variance)
• Composition: Wirewound (exact match required)

Parameter Comparison

Engineering Selection Recommendations

For RoHS Compliance Requirements: The 41F100E (Ohmite) and ALSR01100R0FE12 (Vishay Dale) are compliant alternatives. The 41F100E maintains identical dimensions and manufacturer lineage. The ALSR01100R0FE12 provides ROHS3 compliance with moisture-resistant construction but features slightly smaller dimensions.

For Identical Physical Footprint: The 41F100E and 81F100 maintain the original 0.126" diameter and 0.437" length specification, ensuring direct mechanical compatibility in existing PCB layouts.

For Moisture-Resistant Applications: The ALSR01100R0FE12 and RS01A100R0FS70 incorporate moisture-resistant features. The ALSR01100R0FE12 is ROHS3 compliant; the RS01A100R0FS70 is RoHS non-compliant.

For Temperature Coefficient Matching: All substitutes except ALSR01100R0FE12 maintain the ±20ppm/°C specification. The ALSR01100R0FE12 specifies ±30ppm/°C, acceptable for applications with relaxed temperature stability requirements.

For Inventory Availability: RS01A100R0FS70 (1520 Pcs) and ALSR01100R0FE12 (1371 Pcs) offer the highest stock levels.

Frequently Asked Questions (FAQ)

Q: Can the 41F100E be used as a direct replacement for the 41F100?

A: Yes. The 41F100E is a direct equivalent from Ohmite with identical electrical specifications (100 Ohms, ±1%, 1W, ±20ppm/°C) and package dimensions (0.126" Dia x 0.437" L). The primary difference is RoHS compliance status. Both are through-hole axial wirewound resistors suitable for identical applications.

Q: Are the Vishay Dale parts (ALSR01100R0FE12 and RS01A100R0FS70) mechanically compatible with the 41F100?

A: Both Vishay Dale parts are axial through-hole resistors with matching electrical specifications. However, dimensional differences exist: ALSR01100R0FE12 measures 0.110" Dia x 0.406" L, and RS01A100R0FS70 measures 0.094" Dia x 0.406" L, compared to the 41F100 at 0.126" Dia x 0.437" L. These smaller dimensions are compatible with standard through-hole PCB layouts but may affect mechanical fit in applications with tight spacing constraints.

Q: What is the difference between the 41F100 and 81F100?

A: Both are Ohmite wirewound axial resistors with identical electrical specifications (100 Ohms, ±1%, 1W, ±20ppm/°C) and package dimensions. The 41F100 belongs to the Ohmicone® 40 series, while the 81F100 belongs to the Acrasil® 80 series. Series designation reflects different product lines within Ohmite's portfolio but does not affect electrical or mechanical compatibility.

Q: Which substitute part is recommended for new designs requiring RoHS compliance?

A: The 41F100E (Ohmite, RoHS Compliant) or ALSR01100R0FE12 (Vishay Dale, ROHS3 Compliant) are appropriate selections. The 41F100E maintains identical dimensions and manufacturer continuity. The ALSR01100R0FE12 adds moisture-resistant construction but with slightly smaller physical dimensions.

Q: Does the ±30ppm/°C temperature coefficient of the ALSR01100R0FE12 affect substitution suitability?

A: The ALSR01100R0FE12 specifies ±30ppm/°C compared to the 41F100 at ±20ppm/°C. This represents a 50% increase in temperature coefficient. Substitution is appropriate for applications where temperature stability requirements do not mandate the tighter ±20ppm/°C specification. For precision circuits requiring ±20ppm/°C performance, the 41F100E, RS01A100R0FS70, or 81F100 are preferred.

Q: What packaging formats are available for these substitute parts?

A: The 41F100E is supplied in standard packaging. The ALSR01100R0FE12 is available in Bulk packaging. The RS01A100R0FS70 is supplied in Cut Tape (CT) format. Packaging selection depends on procurement volume and assembly process requirements.