OF271JE Equivalent & Substitute Parts

Part Overview

The OF271JE is a 270 Ohms ±5% 0.5W through-hole axial resistor manufactured by Ohmite as part of the Little Demon® OF series. This carbon composition resistor features pulse withstanding capability and is designed for axial lead applications. The product is classified as obsolete, making identification of suitable substitute components essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

OF271JE

OhmiteIn Stock: 794OF271JE Datasheet

Current PartRFQ

OF271KE

OhmiteIn Stock: 2016OF271KE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OF271JE is determined by the following critical parameters that must remain constant or within acceptable engineering tolerances:

• Resistance Value: 270 Ohms (exact match required)
• Power Rating: 0.5W minimum (equal or higher acceptable)
• Package Type: Axial lead configuration (mechanical and electrical compatibility)
• Physical Dimensions: 0.150" Dia x 0.406" L (board layout and mounting compatibility)
• Composition: Carbon composition (electrical characteristics and thermal behavior)
• Compliance: ROHS3 compliance maintained

The OF271KE qualifies as a direct substitute based on matching resistance value, power rating, package type, dimensions, composition, and compliance status. The tolerance specification differs (±10% versus ±5%), which represents a relaxation of the tolerance requirement and is acceptable for applications where the original ±5% tolerance is not a critical design constraint.

Parameter Comparison

Engineering Selection Recommendations

The OF271KE is the manufacturer-recommended substitute for the obsolete OF271JE. Both components maintain ROHS3 compliance and identical MSL ratings, ensuring regulatory and environmental compatibility in replacement applications.

Selection of the OF271KE should be evaluated based on the tolerance requirement of the target application. The OF271JE provides ±5% tolerance, while the OF271KE provides ±10% tolerance. Applications requiring tighter tolerance control should verify that the ±10% specification of the OF271KE remains within acceptable circuit performance parameters before implementation.

Both components share identical physical dimensions, electrical composition, and package configuration, ensuring direct mechanical and electrical compatibility in axial lead through-hole mounting applications.

Frequently Asked Questions (FAQ)

Q: Can OF271KE be used as a direct replacement for OF271JE?

A: Yes. The OF271KE is the manufacturer-recommended substitute. Both components have identical resistance values (270 Ohms), power ratings (0.5W), package types (axial), physical dimensions (0.150" Dia x 0.406" L), and composition (carbon composition). The primary difference is tolerance specification: OF271JE is ±5% while OF271KE is ±10%.

Q: What is the key difference between these two parts?

A: The tolerance specification differs. OF271JE provides ±5% tolerance, while OF271KE provides ±10% tolerance. Both are Little Demon® OF series components from Ohmite with identical electrical and mechanical characteristics otherwise.

Q: Are the physical dimensions identical?

A: Yes. Both OF271JE and OF271KE measure 0.150" diameter by 0.406" length (3.80mm x 10.30mm), ensuring identical board layout compatibility and mounting requirements.

Q: Do both parts meet RoHS compliance?

A: Yes. Both OF271JE and OF271KE are ROHS3 compliant with MSL rating 1 (unlimited moisture sensitivity level).

Q: Should I verify tolerance compatibility before substitution?

A: Tolerance selection depends on circuit requirements. If the original design specified ±5% tolerance for critical circuit function, verify that ±10% tolerance of the OF271KE remains within acceptable performance parameters for your specific application before implementation.