Ohmite 91J56R Equivalent & Substitute Parts

Part Overview

The Ohmite 91J56R is a 56 Ohm, 1.5W wirewound axial resistor with ±5% tolerance and flame retardant coating. This component is designed for through-hole applications requiring reliable power dissipation and safety features in electronic circuits. The part is currently in active production status. Substitute parts are identified to address inventory availability, packaging preferences, or compliance requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

91J56R

OhmiteIn Stock: 92891J56R Datasheet

Current PartRFQ

91J56RE

OhmiteIn Stock: 81591J56RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Ohmite 91J56R is determined by strict equivalence across the following critical parameters:

• Resistance value: 56 Ohms
• Tolerance: ±5%
• Power rating: 1.5W
• Composition: Wirewound
• Package configuration: Axial
• Physical dimensions: 0.142" Dia x 0.453" L (3.60mm x 11.50mm)
• Temperature coefficient: ±30ppm/°C
• Safety features: Flame retardant coating

The substitute part 91J56RE meets all electrical and mechanical requirements for direct substitution. Differences in packaging format (Bulk vs. standard) and RoHS compliance status do not affect functional compatibility in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 91J56R and 91J56RE are active production components from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on the following criteria:

91J56R is suitable for applications where RoHS non-compliant components are acceptable and standard packaging is preferred.

91J56RE is the appropriate choice for applications requiring ROHS3 compliance or bulk packaging formats. The improved RoHS compliance status makes this substitute the preferred option for modern manufacturing environments and regulated industries.

Both parts are functionally interchangeable in circuit design and PCB layout without modification.

Frequently Asked Questions (FAQ)

Q: Can 91J56RE be used as a direct replacement for 91J56R in existing designs?

A: Yes. The 91J56RE is electrically and mechanically identical to the 91J56R. No circuit modifications or PCB layout changes are required for substitution.

Q: What is the difference between the standard and bulk packaging formats?

A: Packaging format refers to the quantity and presentation method for component delivery. Both formats contain identical components with the same electrical specifications. Selection depends on procurement volume requirements and inventory management practices.

Q: Does the RoHS compliance difference affect circuit performance?

A: No. RoHS compliance status indicates manufacturing process adherence to environmental regulations but does not alter the component's electrical or thermal characteristics. Both parts deliver identical performance in circuit applications.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts measure 0.142" Dia x 0.453" L (3.60mm x 11.50mm) and are compatible with identical PCB footprints and through-hole mounting specifications.

Q: What is the significance of the Moisture Sensitivity Level (MSL) difference?

A: The 91J56R lists MSL as Not Applicable, while 91J56RE specifies MSL 1 (Unlimited). This indicates the 91J56RE has no moisture sensitivity restrictions during storage and handling, providing greater flexibility in supply chain management.