Ohmite 41FR33 Equivalent & Substitute Parts

Part Overview

The Ohmite 41FR33 is a 330 mOhms ±1% 1W axial wirewound resistor from the Ohmicone® 40 series. This component is designed for through-hole applications requiring precision current-sensing or low-resistance load applications. The part is currently active in production. Substitute parts are identified when the primary part becomes unavailable or when procurement requirements necessitate alternative sourcing from qualified manufacturers offering equivalent electrical and mechanical specifications.

Substiute Parts

41FR33

OhmiteIn Stock: 97041FR33 Datasheet

Current PartRFQ

ALSR01R3300FE12

Vishay DaleIn Stock: 1304ALSR01R3300FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 41FR33 are qualified based on the following electrical and mechanical parameters:

• Resistance Value: 330 mOhms (exact match required)
• Tolerance: ±1% (ensures precision matching in circuit applications)
• Power Rating: 1W (maintains thermal performance requirements)
• Composition: Wirewound (required for low-resistance, high-precision applications)
• Package Type: Axial (ensures mechanical compatibility with through-hole PCB layouts)
• Termination Count: 2 (standard for axial components)

The Vishay Dale ALSR01R3300FE12 meets all critical electrical specifications and is mechanically compatible as an axial package component. Both parts operate within acceptable dimensional tolerances for standard through-hole PCB footprints.

Parameter Comparison

Engineering Selection Recommendations

Ohmite 41FR33: Select this part for applications where RoHS non-compliant components are acceptable and the original design specification requires the Ohmicone® 40 series characteristics.

Vishay Dale ALSR01R3300FE12: This substitute is suitable for new designs or applications requiring ROHS3 compliance. The ALSR series provides moisture-resistant construction and a defined operating temperature range of -65°C to 250°C. The slightly smaller physical dimensions (0.110" diameter vs. 0.126" diameter) remain compatible with standard axial component PCB footprints. Both parts share identical electrical specifications: 330 mOhms resistance, ±1% tolerance, and 1W power rating.

Frequently Asked Questions (FAQ)

Q: Can the Vishay Dale ALSR01R3300FE12 be used as a direct replacement for the Ohmite 41FR33?

A: Yes. Both parts meet the core electrical requirements: 330 mOhms resistance, ±1% tolerance, 1W power rating, and wirewound axial construction. The dimensional difference (0.110" vs. 0.126" diameter) is within acceptable tolerances for standard through-hole PCB layouts.

Q: What is the primary difference between these two parts?

A: The Vishay Dale ALSR01R3300FE12 is ROHS3 compliant with moisture-resistant construction and a specified operating temperature range (-65°C to 250°C). The Ohmite 41FR33 is RoHS non-compliant. Both deliver identical electrical performance.

Q: Are there any mechanical compatibility concerns?

A: No. Both components are axial package resistors with 2 terminations. The slight difference in body diameter (0.110" vs. 0.126") does not affect compatibility with standard axial component footprints used in through-hole PCB designs.

Q: Which part should be selected for new product designs?

A: The Vishay Dale ALSR01R3300FE12 is recommended for new designs due to ROHS3 compliance and moisture-resistant construction, unless the design specifically requires the Ohmicone® 40 series characteristics.

Q: Do both parts have the same temperature coefficient?

A: The Ohmite 41FR33 specifies ±90ppm/°C. The Vishay Dale ALSR01R3300FE12 does not provide a temperature coefficient specification in the available data. Both parts operate within their respective temperature ranges without performance degradation for standard circuit applications.