OA681KE Equivalent & Substitute Parts

Part Overview

The OA681KE is a 680 Ohms ±10% 1W through-hole resistor in axial configuration, manufactured by Ohmite as part of the Little Demon® OA series. This component is classified as obsolete, indicating that the original product line has been discontinued. For applications requiring continued supply or new designs, equivalent substitute parts meeting the same electrical and mechanical specifications are necessary.

Substiute Parts

OA681KE

OhmiteIn Stock: 992OA681KE Datasheet

Current PartRFQ

OX681KE

OhmiteIn Stock: 1078OX681KE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OA681KE is based on the following critical parameters:

• Electrical Match: Resistance value of 680 Ohms with ±10% tolerance and 1W power rating
• Package Compatibility: Axial through-hole configuration with 2 terminations
• Environmental Suitability: Moisture sensitivity level and operating temperature range
• Mechanical Fit: Physical dimensions compatible with PCB layouts designed for axial components

The OX681KE qualifies as a direct substitute because it maintains identical electrical specifications (680 Ohms ±10%, 1W) and package type (axial), while offering enhanced material composition and active product status.

Parameter Comparison

Engineering Selection Recommendations

The OX681KE is the recommended substitute for the obsolete OA681KE based on the following factors:

• Active Product Status: The OX681KE is actively manufactured and stocked, ensuring long-term availability and supply chain continuity
• Electrical Equivalence: Both parts maintain identical resistance (680 Ohms), tolerance (±10%), and power rating (1W)
• Package Compatibility: Axial configuration with matching termination count ensures direct PCB layout compatibility
• Regulatory Compliance: The OX681KE is ROHS3 compliant, meeting current environmental and regulatory requirements
• Enhanced Features: Ceramic composition with moisture resistance provides improved reliability compared to the carbon composition original

Frequently Asked Questions (FAQ)

Q: Can the OX681KE be used as a direct replacement for the OA681KE?

A: Yes. Both components share identical electrical specifications (680 Ohms ±10%, 1W) and axial package configuration. The OX681KE is electrically and mechanically compatible with designs originally specified for the OA681KE.

Q: What is the difference between carbon composition and ceramic resistors?

A: The OA681KE uses carbon composition material, while the OX681KE uses ceramic material. Ceramic resistors typically offer improved moisture resistance and temperature stability. Both compositions meet the specified electrical parameters for this application.

Q: Are there any dimensional differences between these parts?

A: The OA681KE measures 0.236" Dia x 0.591" L (6.00mm x 15.00mm), while the OX681KE measures 0.217" Dia x 0.650" L (5.50mm x 16.50mm). Both are axial through-hole components suitable for standard PCB layouts, though slight dimensional variations exist.

Q: Is the OX681KE suitable for high-temperature applications?

A: The OX681KE operates across -40°C to 220°C, making it suitable for extended temperature range applications. The original OA681KE operating temperature range was not specified.

Q: Does the OX681KE meet current regulatory standards?

A: Yes. The OX681KE is ROHS3 compliant and carries EAR99 ECCN classification, meeting current environmental and export regulations.