OF330JE Equivalent & Substitute Parts

Part Overview

The OF330JE is a 33 Ohm, 0.5W axial carbon composition resistor manufactured by Ohmite as part of the Little Demon® OF series. This component is classified as obsolete, making equivalent or substitute parts necessary for ongoing design support and procurement. The OF330JE features pulse withstanding capability and ROHS3 compliance, with axial through-hole packaging suitable for traditional PCB assembly methods.

Substiute Parts

OF330JE

OhmiteIn Stock: 1227OF330JE Datasheet

Current PartRFQ

OF27GKE

OhmiteIn Stock: 5867OF27GKE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the OF330JE is limited by the following critical parameters:

• Resistance Value: 33 Ohms (primary functional requirement)
• Tolerance: ±5% (circuit accuracy specification)
• Power Rating: 0.5W minimum (thermal design requirement)
• Package Type: Axial (PCB layout and assembly compatibility)
• Composition: Carbon Composition (electrical characteristics and pulse response)
• Physical Dimensions: 0.150" Dia x 0.406" L (mechanical fit requirement)

The provided substitute part OF27GKE does not meet the critical resistance value requirement (2.7 Ohms vs. 33 Ohms specified) and therefore cannot function as a direct equivalent. This part represents a different resistance value within the same product family and packaging format, but is not suitable for direct substitution in circuits designed for 33 Ohm operation.

Parameter Comparison

Engineering Selection Recommendations

The OF330JE is obsolete and no longer in active production. When sourcing replacements, priority should be given to locating remaining inventory of the original part number. The listed substitute OF27GKE shares identical mechanical packaging, electrical composition, power rating, and regulatory compliance characteristics with the OF330JE. However, the resistance value difference (2.7 Ohms versus 33 Ohms) makes this part unsuitable for direct circuit substitution.

For applications requiring a 33 Ohm, 0.5W axial carbon composition resistor, alternative sources should be consulted for equivalent parts from other manufacturers offering the same electrical and mechanical specifications. Any replacement must maintain the 33 Ohm resistance value, ±5% tolerance minimum, 0.5W power rating, and axial package format to ensure circuit functionality and PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can OF27GKE be used in place of OF330JE?

A: No. While both parts share the same package type, physical dimensions, power rating, and composition, the resistance values differ significantly (2.7 Ohms vs. 33 Ohms). Direct substitution would alter circuit behavior and is not permissible.

Q: What makes a resistor a valid substitute for OF330JE?

A: A valid substitute must maintain: 33 Ohm resistance value, ±5% tolerance or better, 0.5W power rating minimum, axial through-hole package, carbon composition construction, and compatible physical dimensions (0.150" Dia x 0.406" L).

Q: Is the OF330JE still available for purchase?

A: The OF330JE is classified as obsolete. Availability is limited to remaining inventory from authorized distributors. Current inventory levels should be verified directly with component suppliers.

Q: Are there compliance concerns with using the OF330JE in new designs?

A: The OF330JE maintains ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, meeting current regulatory requirements. However, obsolete status may present long-term supply chain risks for production quantities.

Q: What is the difference between the tolerance ratings of these parts?

A: OF330JE specifies ±5% tolerance, while OF27GKE specifies ±10% tolerance. Tolerance affects circuit accuracy and should be verified against design requirements. However, this distinction is secondary to the incompatible resistance values.