OF331JE Equivalent & Substitute Parts

Part Overview

The OF331JE is a 330 Ohm ±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 part is classified as obsolete, making equivalent and substitute parts necessary for ongoing procurement and system maintenance.

Substiute Parts

OF331JE

OhmiteIn Stock: 999OF331JE Datasheet

Current PartRFQ

OF331KE

OhmiteIn Stock: 1098OF331KE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the OF331JE is determined by the following critical parameters:

• Resistance value: 330 Ohms (exact match required)
• Power rating: 0.5W minimum (1/2W)
• Package configuration: Axial through-hole
• Physical dimensions: 0.150" Dia x 0.406" L
• Composition: Carbon composition
• Compliance: ROHS3 compliant

The OF331KE qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. The tolerance specification differs (±10% versus ±5%), which represents a relaxation of the tolerance requirement and does not prevent substitution in applications where the original ±5% tolerance is not a functional requirement.

Parameter Comparison

Engineering Selection Recommendations

The OF331KE is the manufacturer-recommended substitute for the obsolete OF331JE. Both parts maintain identical electrical performance in terms of resistance value, power dissipation capability, and physical form factor. Both are ROHS3 compliant and carry unlimited moisture sensitivity rating.

Selection between these parts depends on tolerance requirements. The OF331JE provides ±5% tolerance, while the OF331KE provides ±10% tolerance. Applications requiring tighter tolerance control should verify that the ±10% specification of the OF331KE meets circuit design margins before substitution. For applications where tolerance is not a critical parameter, the OF331KE provides direct functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can OF331KE replace OF331JE in all applications?

A: The OF331KE matches all critical electrical and mechanical parameters. Substitution is valid provided the application does not require the tighter ±5% tolerance specification. Review circuit design documentation to confirm tolerance requirements.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.150" Dia x 0.406" L (3.80mm x 10.30mm) and use identical axial lead configuration, ensuring mechanical compatibility in PCB layouts and through-hole assemblies.

Q: What is the difference between these parts?

A: The primary difference is tolerance specification. OF331JE is ±5% tolerance, while OF331KE is ±10% tolerance. All other electrical characteristics, physical dimensions, and compliance certifications are identical.

Q: Are both parts ROHS3 compliant?

A: Yes. Both OF331JE and OF331KE are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Q: Why is OF331JE marked as obsolete?

A: The OF331JE is classified as obsolete by the manufacturer. The OF331KE remains available as the recommended alternative for ongoing procurement.