OX681K Equivalent & Substitute Parts

Part Overview

The OX681K is a 680 Ohms ±10% 1W through-hole axial resistor manufactured by Ohmite with ceramic composition, moisture-resistant and pulse-withstanding characteristics. This part is classified as obsolete, making identification of suitable substitutes necessary for ongoing design support and procurement planning. The OX681K operates across a temperature range of -40°C to 220°C and is designed for applications requiring reliable axial-lead resistor performance in moisture-prone environments.

Substiute Parts

OX681K

OhmiteIn Stock: 1025OX681K Datasheet

Current PartRFQ

OX681KE

OhmiteIn Stock: 1078OX681KE Datasheet

DirectRFQ

OX681K

OhmiteIn Stock: 1025OX681K Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OX681K is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part OX681KE maintains identical specifications for resistance value, tolerance, power rating, ceramic composition, axial package configuration, physical dimensions, operating temperature range, and temperature coefficient. Both parts feature moisture-resistant and pulse-withstanding characteristics with two terminations. The primary distinction between OX681K and OX681KE is product status and RoHS compliance level, with OX681KE representing the active production equivalent offering ROHS3 compliance versus the obsolete OX681K status.

Parameter Comparison

Engineering Selection Recommendations

The OX681KE is the direct active production substitute for the obsolete OX681K. Both parts are electrically and mechanically identical across all specified parameters. Selection of OX681KE is appropriate for new designs and ongoing procurement due to its active product status and ROHS3 compliance certification. The OX681K remains suitable for legacy system maintenance where existing inventory is available and RoHS compliance is not a design requirement. For applications requiring regulatory compliance with modern environmental standards, OX681KE is the specified choice.

Frequently Asked Questions (FAQ)

Q: Can OX681KE be used as a direct replacement for OX681K in existing designs? A: Yes. OX681KE is electrically and mechanically equivalent to OX681K. All critical parameters including resistance, tolerance, power rating, package dimensions, and operating temperature range are identical. Direct substitution is valid for circuit functionality.

Q: What is the primary difference between OX681K and OX681KE? A: The OX681K is classified as obsolete, while OX681KE is an active production part. OX681KE also carries ROHS3 compliance certification, whereas OX681K is RoHS non-compliant. Electrical and mechanical specifications are identical.

Q: Are the physical dimensions identical between OX681K and OX681KE? A: Yes. Both parts share identical axial package dimensions of 0.217" diameter by 0.650" length (5.50mm x 16.50mm), ensuring mechanical compatibility in PCB layouts and through-hole applications.

Q: What is the operating temperature range for these resistors? A: Both OX681K and OX681KE operate across -40°C to 220°C, with a temperature coefficient of -1000 / -1600 ppm/°C.

Q: Are moisture-resistant properties maintained in the substitute part? A: Yes. OX681KE retains the moisture-resistant and pulse-withstanding ceramic composition characteristics of the OX681K, maintaining performance in moisture-prone environments.