OF750J Equivalent & Substitute Parts

Part Overview

The OF750J is a 75 Ohm, ±5% tolerance, 0.5W (1/2W) through-hole axial resistor manufactured by Ohmite in the Little Demon® OF series. This component is classified as obsolete, though 1065 pieces remain available in new original stock. The OF750J utilizes carbon composition construction with pulse withstanding capability and is housed in a standard axial package measuring 0.150" diameter by 0.406" length (3.80mm x 10.30mm).

Due to the obsolete product status, identifying equivalent and substitute parts is essential for ongoing design support, maintenance, and production continuity. The primary substitute maintains identical electrical and mechanical specifications while offering active product status and improved compliance certifications.

Substiute Parts

OF750J

OhmiteIn Stock: 1149OF750J Datasheet

Current PartRFQ

OF750JE

OhmiteIn Stock: 16530OF750JE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OF750J is determined by strict equivalence across the following critical parameters:

• Resistance Value: 75 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power Rating: 0.5W / 1/2W (exact match required)
• Composition: Carbon Composition (exact match required)
• Package Configuration: Axial through-hole (exact match required)
• Physical Dimensions: 0.150" Dia x 0.406" L (exact match required)
• Features: Pulse Withstanding capability (exact match required)

The OF750JE qualifies as a direct substitute because it maintains identical specifications across all electrical and mechanical parameters. The primary distinction is product status and compliance certification, not functional or dimensional characteristics.

Parameter Comparison

Engineering Selection Recommendations

The OF750JE is the direct equivalent substitute for the OF750J. Both components are manufactured by Ohmite and maintain identical electrical and mechanical specifications across all critical parameters including resistance value, tolerance, power rating, composition, package configuration, and physical dimensions.

The primary distinction between these parts is product lifecycle status. The OF750J is classified as obsolete, while the OF750JE maintains active product status. Additionally, the OF750JE achieves RoHS compliance, whereas the OF750J is RoHS non-compliant. Both components share identical export classification (EAR99) and moisture sensitivity ratings.

For new designs and ongoing production applications, the OF750JE is the appropriate selection due to its active status and enhanced compliance certification. For legacy system maintenance where OF750J components are already deployed, the OF750JE provides functional and dimensional equivalence for replacement purposes.

Frequently Asked Questions (FAQ)

Q: Can the OF750JE be used as a direct replacement for the OF750J in existing circuits?

A: Yes. The OF750JE is electrically and mechanically identical to the OF750J. Both components share the same 75 Ohm resistance, ±5% tolerance, 0.5W power rating, carbon composition construction, axial package configuration, and physical dimensions. No circuit modifications are required.

Q: What is the primary reason to transition from OF750J to OF750JE?

A: The OF750J is obsolete, while the OF750JE maintains active product status. The OF750JE also achieves RoHS compliance. For new designs and long-term production continuity, the OF750JE is the recommended selection.

Q: Are there any dimensional differences between OF750J and OF750JE?

A: No. Both components measure 0.150" diameter by 0.406" length (3.80mm x 10.30mm). They are physically interchangeable in PCB layouts and through-hole applications.

Q: Do both parts have the same moisture sensitivity rating?

A: Yes. Both the OF750J and OF750JE are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: What is the difference in current inventory availability?

A: The OF750J has 1065 pieces in new original stock, while the OF750JE has 16437 pieces available. The OF750JE offers significantly greater supply availability.