Ohmite 91J270 270 Ohm 1.5W Axial Wirewound Resistor Equivalent & Substitute Parts

Part Overview

The Ohmite 91J270 is a 270 Ohm, 1.5W through-hole axial wirewound resistor with flame retardant coating and safety features. This component is classified as Active product status and is widely used in applications requiring precision power dissipation and thermal stability. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part number becomes unavailable or when alternative packaging configurations are required.

Substiute Parts

91J270

OhmiteIn Stock: 92191J270 Datasheet

Current PartRFQ

91J270E

OhmiteIn Stock: 106391J270E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Ohmite 91J270 is determined by strict equivalence across the following critical parameters:

• Resistance value: 270 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 1.5W (exact match required)
• Composition: Wirewound (exact match required)
• Temperature coefficient: ±30ppm/°C (exact match required)
• Package type: Axial (exact match required)
• Physical dimensions: 0.142" Dia x 0.453" L / 3.60mm x 11.50mm (exact match required)
• Number of terminations: 2 (exact match required)

The substitute part 91J270E meets all electrical and mechanical parameters required for direct substitution. The primary distinction between the main part and substitute is packaging configuration and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both the 91J270 and 91J270E are Active product status components manufactured by Ohmite within the Series 90 resistor line. Selection between these parts should be based on regulatory and compliance requirements specific to the application:

The 91J270E offers ROHS3 compliance and REACH Unaffected status, making it suitable for applications subject to European Union environmental regulations and RoHS directives. The 91J270 is classified as RoHS non-compliant and should be selected only for applications where RoHS compliance is not a requirement.

Both parts share identical electrical specifications, mechanical dimensions, and thermal characteristics. The packaging configuration difference (standard versus bulk) reflects procurement and inventory management considerations rather than functional performance differences.

Frequently Asked Questions (FAQ)

Q: Can the 91J270E be used as a direct replacement for the 91J270?

A: Yes. The 91J270E is a parametric equivalent with identical resistance value (270 Ohms), tolerance (±5%), power rating (1.5W), composition (wirewound), temperature coefficient (±30ppm/°C), package type (axial), and physical dimensions (0.142" Dia x 0.453" L). All electrical and mechanical parameters match exactly.

Q: What is the difference between the 91J270 and 91J270E?

A: The primary differences are packaging configuration (standard versus bulk) and regulatory compliance status. The 91J270E is ROHS3 compliant and REACH unaffected, while the 91J270 is RoHS non-compliant. Electrical performance and physical dimensions are identical.

Q: Are there any thermal or performance differences between these parts?

A: No. Both parts have identical temperature coefficient (±30ppm/°C), power rating (1.5W), and thermal characteristics. Performance in circuit applications is equivalent.

Q: Which part should I select for new designs?

A: Selection depends on regulatory requirements. For applications requiring RoHS3 compliance or REACH compliance, select the 91J270E. For applications without these regulatory requirements, either part is suitable based on availability and procurement preferences.

Q: Are the physical dimensions identical?

A: Yes. Both parts have identical axial package dimensions of 0.142" Dia x 0.453" L (3.60mm x 11.50mm) and are mechanically interchangeable in PCB layouts and through-hole applications.

Q: What is the moisture sensitivity level difference?

A: The 91J270 lists MSL as Not Applicable, while the 91J270E is rated MSL 1 (Unlimited). This reflects different classification methodologies and does not indicate functional performance differences for this resistor type.