Ohmite 41FR33E Equivalent & Substitute Parts

Part Overview

The Ohmite 41FR33E is a 330 mOhms ±1% 1W axial wirewound resistor from the Ohmicone® 40 series. This through-hole component is designed for applications requiring precision low-resistance values with tight tolerance specifications. The part is currently active in production with 1115 units in stock. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits alternative sourcing from qualified manufacturers meeting identical electrical and mechanical specifications.

Substiute Parts

41FR33E

OhmiteIn Stock: 122141FR33E Datasheet

Current PartRFQ

ALSR01R3300FE12

Vishay DaleIn Stock: 1304ALSR01R3300FE12 Datasheet

MFR RecommendedRFQ

RS01AR3300FE70

Vishay DaleIn Stock: 2005RS01AR3300FE70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Ohmite 41FR33E are qualified based on the following critical parameters:

• Resistance value: 330 mOhms (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)
• RoHS3 compliance (regulatory requirement)

The identified substitute parts—Vishay Dale ALSR01R3300FE12 and Vishay Dale RS01AR3300FE70—meet all core electrical specifications and regulatory requirements. Both parts are manufactured by Vishay Dale, a qualified alternative source, and maintain identical resistance, tolerance, power rating, and package configuration. Dimensional variations exist within acceptable mechanical tolerances for axial through-hole mounting.

Parameter Comparison

Engineering Selection Recommendations

Both Vishay Dale substitute parts satisfy the electrical and mechanical requirements for direct replacement of the Ohmite 41FR33E. Selection between the two Vishay Dale options depends on packaging requirements:

• ALSR01R3300FE12: Bulk packaging format, moisture-resistant construction, MSL rating 1 (Unlimited)
• RS01AR3300FE70: Cut Tape (CT) packaging format, moisture-resistant construction, MSL rating Not Applicable

All three parts maintain ROHS3 compliance and EAR99 ECCN classification. The Vishay Dale parts provide extended operating temperature range documentation (-65°C ~ 250°C) compared to the main part specification.

Frequently Asked Questions (FAQ)

Q: Can Vishay Dale ALSR01R3300FE12 and RS01AR3300FE70 be used interchangeably with the Ohmite 41FR33E?

A: Both Vishay Dale parts meet identical electrical specifications (330 mOhms, ±1%, 1W, wirewound, axial package). Mechanical dimensions vary slightly but remain compatible with standard axial through-hole PCB layouts. Packaging format differs (bulk vs. cut tape), which may affect assembly processes.

Q: What are the dimensional differences between these parts?

A: Ohmite 41FR33E: 0.126" Dia x 0.437" L (3.20mm x 11.10mm). Vishay Dale ALSR01R3300FE12: 0.110" Dia x 0.406" L (2.79mm x 10.31mm). Vishay Dale RS01AR3300FE70: 0.094" Dia x 0.406" L (2.39mm x 10.31mm). All dimensions are within acceptable tolerances for axial component mounting.

Q: Are all parts RoHS compliant?

A: All three parts are ROHS3 compliant and meet REACH requirements (Ohmite and RS01AR3300FE70 are REACH Unaffected; ALSR01R3300FE12 is Vendor Undefined).

Q: Which substitute part should be selected for moisture-sensitive applications?

A: Both Vishay Dale parts feature moisture-resistant construction. ALSR01R3300FE12 carries MSL rating 1 (Unlimited), indicating superior moisture protection. RS01AR3300FE70 carries MSL rating Not Applicable.

Q: What is the difference between bulk and cut tape packaging?

A: Bulk packaging is suitable for manual assembly and small-volume applications. Cut Tape (CT) packaging is optimized for automated pick-and-place assembly processes and higher-volume production runs.