Ohmite 91J1R3 1.3 Ohm 1.5W Axial Wirewound Resistor - Equivalent & Substitute Parts

Part Overview

The Ohmite 91J1R3 is a 1.3 Ohm, 1.5W through-hole axial wirewound resistor with flame retardant coating and safety features. This component is designed for applications requiring precision current limiting, load balancing, and thermal management in electronic circuits. The part maintains Active product status with 1116 units currently in stock. Substitute parts are identified when original inventory becomes unavailable or when alternative packaging or compliance requirements necessitate component replacement.

Substiute Parts

91J1R3

OhmiteIn Stock: 117591J1R3 Datasheet

Current PartRFQ

91J1R3E

OhmiteIn Stock: 95091J1R3E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 91J1R3 are identified based on strict electrical and mechanical parameter matching within the Ohmite 90 series. The substitution criteria are:

• Resistance value: 1.3 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 1.5W (exact match required)
• Composition: Wirewound (exact match required)
• Package type: Axial (exact match required)
• Physical dimensions: 0.142" Dia x 0.453" L (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Features: Flame retardant coating and safety characteristics (exact match required)

The 91J1R3E qualifies as a parametric equivalent because it maintains all electrical specifications and mechanical dimensions identical to the main part. Packaging differences (Bulk vs. standard) and RoHS compliance variations do not affect electrical or mechanical interchangeability.

Parameter Comparison

Engineering Selection Recommendations

The 91J1R3E serves as a direct electrical and mechanical substitute for the 91J1R3. Both parts are Active products within the Ohmite 90 series and maintain identical electrical performance characteristics. Selection between these parts should be based on:

• RoHS compliance requirements: The 91J1R3E is ROHS3 compliant, while the 91J1R3 is RoHS non-compliant. Applications subject to RoHS regulations must use the 91J1R3E.
• Packaging requirements: The 91J1R3E is supplied in Bulk packaging, while the 91J1R3 uses standard packaging. Procurement volume and handling procedures may influence packaging selection.
• Inventory availability: The 91J1R3 has 1116 units in stock, while the 91J1R3E has 933 units available. Lead time and supply chain considerations may affect part selection.

Both parts are suitable for identical circuit applications without modification to PCB layout, schematic design, or thermal management strategies.

Frequently Asked Questions (FAQ)

Q: Can the 91J1R3E replace the 91J1R3 in existing designs?

A: Yes. The 91J1R3E is electrically and mechanically identical to the 91J1R3. Both parts have the same resistance value (1.3 Ohms), tolerance (±5%), power rating (1.5W), physical dimensions (0.142" Dia x 0.453" L), and thermal characteristics (±100ppm/°C). Direct substitution requires no circuit modifications.

Q: What is the difference between the 91J1R3 and 91J1R3E?

A: The primary differences are packaging format (Standard vs. Bulk), RoHS compliance status (non-compliant vs. ROHS3 compliant), and current inventory levels. Electrical and mechanical specifications are identical.

Q: Which part should I select for RoHS-regulated applications?

A: The 91J1R3E is ROHS3 compliant and must be used for applications subject to RoHS directives. The 91J1R3 is RoHS non-compliant and is not suitable for RoHS-regulated environments.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both the 91J1R3 and 91J1R3E have identical axial package dimensions of 0.142" Dia x 0.453" L (3.60mm x 11.50mm). PCB footprints and mounting requirements are identical.

Q: What is the moisture sensitivity level for these parts?

A: The 91J1R3 has a Moisture Sensitivity Level listed as Not Applicable. The 91J1R3E has MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for either part.

Q: Can these parts be used interchangeably in high-temperature applications?

A: Both parts have identical temperature coefficients of ±100ppm/°C and are suitable for identical thermal operating ranges. Interchangeability is not affected by temperature performance characteristics.