OF103JE Equivalent & Substitute Parts

Part Overview

The OF103JE is a 10 kOhms ±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 designed for axial lead configuration. The product is classified as obsolete, making identification of equivalent substitute parts essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

OF103JE

OhmiteIn Stock: 1231OF103JE Datasheet

Current PartRFQ

OF103KE

OhmiteIn Stock: 917OF103KE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OF103JE is determined by the following critical parameters:

• Resistance Value: Must be 10 kOhms
• Power Rating: Must be 0.5W (1/2W) minimum
• Package Configuration: Must be axial through-hole
• Physical Dimensions: Must match 0.150" Dia x 0.406" L (3.80mm x 10.30mm)
• Composition: Carbon composition construction
• Compliance: ROHS3 compliance required

The OF103KE qualifies as a manufacturer-recommended substitute. While tolerance differs at ±10% versus the original ±5%, all other critical parameters—resistance value, power rating, package type, physical dimensions, composition, and compliance certifications—remain identical. Both parts share the same series designation (Little Demon® OF) and feature pulse withstanding capability.

Parameter Comparison

Engineering Selection Recommendations

The OF103KE is the manufacturer-recommended substitute for the obsolete OF103JE. Both components maintain identical electrical performance characteristics in terms of resistance value and power dissipation capability. The primary distinction is tolerance specification: the OF103KE operates at ±10% tolerance compared to the OF103JE's ±5% tolerance.

Both parts are ROHS3 compliant and carry identical moisture sensitivity ratings. Physical dimensions and axial package configuration are identical, ensuring direct mechanical compatibility in existing circuit board layouts and through-hole applications.

Selection between these parts should be based on circuit tolerance requirements. Applications requiring tighter tolerance specifications (±5%) must use the OF103JE if available. Applications where ±10% tolerance is acceptable may use the OF103KE as a direct substitute.

Frequently Asked Questions (FAQ)

Q: Can OF103KE replace OF103JE in all applications?

A: The OF103KE is mechanically and electrically compatible with the OF103JE in terms of resistance value, power rating, package type, and physical dimensions. The tolerance difference (±10% versus ±5%) must be evaluated against circuit requirements. If the circuit design specifies ±5% tolerance, the OF103KE may not be suitable.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both OF103JE and OF103KE share identical dimensions of 0.150" Dia x 0.406" L (3.80mm x 10.30mm) and use axial through-hole packaging, ensuring direct mechanical compatibility.

Q: What is the significance of the tolerance difference?

A: The OF103JE provides ±5% tolerance, while the OF103KE provides ±10% tolerance. In applications where resistance value precision is critical, the tighter tolerance of the OF103JE is required. For general-purpose applications, the ±10% tolerance of the OF103KE is typically acceptable.

Q: Are both parts RoHS compliant?

A: Yes. Both OF103JE and OF103KE are ROHS3 compliant and carry identical moisture sensitivity ratings of MSL 1 (Unlimited).

Q: What does "Pulse Withstanding" mean for these resistors?

A: Pulse withstanding capability indicates that both resistors are designed to handle transient overvoltage conditions and pulse events without degradation, making them suitable for applications subject to electrical transients.