OF241JE Equivalent & Substitute Parts

Part Overview

The OF241JE is a 240 Ohms ±5% 0.5W through-hole axial resistor manufactured by Ohmite as part of the Little Demon® OF series. This carbon composition resistor features pulse withstanding capability and is packaged in an axial configuration with 0.150" diameter and 0.406" length dimensions. The product is classified as obsolete, making equivalent and substitute parts necessary for ongoing circuit maintenance, repair, and legacy system support.

Substiute Parts

OF241JE

OhmiteIn Stock: 949OF241JE Datasheet

Current PartRFQ

OF221KE

OhmiteIn Stock: 1469OF221KE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the OF241JE is based on the following critical parameters that must align for functional equivalence:

Resistance value tolerance and power rating form the primary substitution criteria. The OF241JE operates at 240 Ohms with ±5% tolerance and 0.5W power capacity. Substitute parts must maintain compatible resistance within acceptable circuit operating margins and support equivalent or greater power dissipation requirements.

Physical package compatibility is mandatory. The axial through-hole configuration with 0.150" diameter and 0.406" length ensures mechanical fit in legacy PCB layouts designed for the original component.

Material composition, RoHS compliance status, and moisture sensitivity classification must remain consistent to preserve circuit reliability and regulatory compliance across production batches and supply chain sources.

The OF221KE qualifies as a substitute based on matching package geometry, axial configuration, carbon composition construction, identical physical dimensions, equivalent power rating, and ROHS3 compliance. The resistance value differs at 220 Ohms ±10%, which represents a 8.3% deviation from the original 240 Ohm specification and falls within acceptable substitution parameters for applications where this tolerance variance does not compromise circuit function.

Parameter Comparison

Engineering Selection Recommendations

The OF221KE serves as a direct substitute for the OF241JE in applications where the 20-Ohm resistance differential and increased tolerance band do not introduce circuit performance degradation. Both components share identical physical packaging, power dissipation capacity, and regulatory compliance certifications.

Selection between these obsolete components should be based on circuit-specific requirements regarding resistance accuracy and load characteristics. The OF241JE provides tighter tolerance control at ±5%, while the OF221KE operates at a lower resistance value with ±10% tolerance. Both maintain ROHS3 compliance and unlimited moisture sensitivity classification, ensuring compatibility with modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can the OF221KE directly replace the OF241JE in any circuit?

A: Physical and electrical compatibility exists for axial through-hole PCB mounting. However, the 20-Ohm resistance difference and tolerance variance must be evaluated against circuit design specifications. Applications with strict resistance requirements may require circuit analysis before substitution.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both the OF241JE and OF221KE share identical axial package dimensions of 0.150" diameter by 0.406" length (3.80mm x 10.30mm), ensuring mechanical compatibility in legacy PCB layouts.

Q: Do both parts meet current regulatory compliance standards?

A: Both components are ROHS3 compliant with moisture sensitivity level 1 (unlimited), meeting current environmental and regulatory requirements for electronic component manufacturing and deployment.

Q: What is the resistance tolerance difference between these parts?

A: The OF241JE operates at ±5% tolerance around 240 Ohms, while the OF221KE operates at ±10% tolerance around 220 Ohms. This represents a nominal 8.3% resistance reduction with a wider tolerance band on the substitute part.

Q: Are both parts still in active production?

A: Both the OF241JE and OF221KE are classified as obsolete products. Availability is limited to existing inventory stocks. Component selection should account for long-term supply chain considerations.