OF242JE Equivalent & Substitute Parts

Part Overview

The OF242JE is a 2.4 kOhms ±5% 0.5W through-hole resistor manufactured by Ohmite as part of the Little Demon® OF series. This carbon composition axial resistor features pulse withstanding capability and is designed for applications requiring reliable performance in harsh environments. The product is classified as obsolete, making identification of suitable substitute components essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

OF242JE

OhmiteIn Stock: 1183OF242JE Datasheet

Current PartRFQ

OF222KE

OhmiteIn Stock: 1096OF222KE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OF242JE is determined by the following critical parameters:

• Resistance Value: The substitute must accommodate the 2.4 kOhms nominal value within acceptable circuit tolerance margins
• Power Rating: The substitute must maintain the 0.5W (1/2W) power dissipation capability
• Package Type: The substitute must be axial configuration to ensure mechanical and electrical compatibility with existing PCB layouts
• Physical Dimensions: The substitute must match the 0.150" Dia x 0.406" L footprint for direct board-level replacement
• Composition: Carbon composition construction ensures consistency with original design specifications
• Compliance: RoHS3 compliance and MSL 1 rating must be maintained

The OF222KE substitute meets these criteria with a 2.2 kOhms resistance value at ±10% tolerance, which falls within acceptable substitution parameters for legacy carbon composition resistor applications.

Parameter Comparison

Engineering Selection Recommendations

Both the OF242JE and OF222KE are obsolete products from the Ohmite Little Demon® OF series. Selection between these components should be based on circuit tolerance requirements and application-specific resistance value needs.

The OF242JE provides tighter tolerance control at ±5%, suitable for applications with strict resistance specifications. The OF222KE offers a lower resistance value at 2.2 kOhms with ±10% tolerance, appropriate for circuits where the 200 Ohm difference and wider tolerance band are acceptable.

Both components maintain identical power ratings, physical dimensions, axial package configuration, and compliance certifications (ROHS3, MSL 1). Direct board-level substitution is mechanically and electrically feasible between these two resistors.

Frequently Asked Questions (FAQ)

Q: Can OF222KE directly replace OF242JE in any application?

A: Direct substitution depends on circuit tolerance requirements. The 200 Ohm resistance difference (2.4 kOhms vs. 2.2 kOhms) and tolerance variance (±5% vs. ±10%) must be evaluated against the specific circuit design. Mechanical compatibility is confirmed due to identical axial package dimensions.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both OF242JE and OF222KE share the same 0.150" Dia x 0.406" L (3.80mm x 10.30mm) axial package dimensions, enabling direct PCB footprint compatibility.

Q: Do both parts meet current compliance requirements?

A: Both components are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting standard environmental and regulatory requirements for legacy component replacement.

Q: What is the resistance tolerance difference impact?

A: OF242JE operates at ±5% tolerance, while OF222KE operates at ±10% tolerance. Applications requiring tighter resistance control should prioritize OF242JE where available. Circuits with broader tolerance margins can accommodate OF222KE substitution.

Q: Are both parts still in production?

A: Both OF242JE and OF222KE are classified as obsolete products. Availability is limited to existing inventory stocks. Verification of current stock status is recommended before design implementation.