Ohmite 91J5R1 Equivalent & Substitute Parts

Part Overview

The Ohmite 91J5R1 is a 5.1 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. The part is currently active in production with 695 units in stock. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within the specified parameter range.

Substiute Parts

91J5R1

OhmiteIn Stock: 79891J5R1 Datasheet

Current PartRFQ

91J5R1E

OhmiteIn Stock: 86391J5R1E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Ohmite 91J5R1E is classified as a parametric equivalent based on the following criteria:

• Identical resistance value: 5.1 Ohms
• Identical tolerance: ±5%
• Identical power rating: 1.5W
• Identical composition: Wirewound
• Identical package type: Axial
• Identical temperature coefficient: ±100ppm/°C
• Identical physical dimensions: 0.142" Dia x 0.453" L (3.60mm x 11.50mm)
• Identical features: Flame Retardant Coating, Safety
• Identical number of terminations: 2

The primary difference is packaging format (Bulk vs. standard) and RoHS compliance status, which do not affect electrical or mechanical performance in the application circuit.

Parameter Comparison

Engineering Selection Recommendations

Both the 91J5R1 and 91J5R1E are active production parts from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on regulatory and compliance requirements:

• For applications requiring ROHS3 compliance, the 91J5R1E is the appropriate selection.
• For applications without RoHS compliance mandates, either part is electrically and mechanically interchangeable.
• The 91J5R1E offers higher inventory availability (838 units vs. 695 units), which may influence lead time considerations.

Frequently Asked Questions (FAQ)

Q: Can the 91J5R1E be used as a direct replacement for the 91J5R1?

A: Yes. The 91J5R1E is electrically and mechanically identical to the 91J5R1. Both parts have the same resistance value (5.1 Ohms), tolerance (±5%), power rating (1.5W), physical dimensions (0.142" Dia x 0.453" L), and axial package configuration. They are pin-compatible and functionally equivalent in circuit applications.

Q: What is the difference between the 91J5R1 and 91J5R1E?

A: The primary differences are packaging format and RoHS compliance status. The 91J5R1E is supplied in Bulk packaging and is ROHS3 compliant, while the 91J5R1 is RoHS non-compliant. These differences do not affect electrical performance or mechanical fit.

Q: Are there any thermal or environmental performance differences?

A: No. Both parts have identical temperature coefficients (±100ppm/°C) and identical flame retardant coating and safety features. They perform identically across the specified operating temperature range.

Q: Which part should I specify for new designs?

A: Selection depends on regulatory requirements. For designs requiring RoHS3 compliance, specify the 91J5R1E. For applications without compliance mandates, either part is acceptable based on availability and procurement preferences.

Q: Are the physical dimensions identical?

A: Yes. Both parts have identical dimensions of 0.142" Dia x 0.453" L (3.60mm x 11.50mm) and identical axial package configuration. They occupy the same PCB footprint and require identical mounting clearances.