TWM3J68R Equivalent & Substitute Parts

Part Overview

The TWM3J68R is a 68 Ohm, 3W through-hole resistor manufactured by Ohmite, featuring metal oxide film construction with flame-proof and safety characteristics. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity. The TWM series radial resistor is designed for applications requiring robust thermal performance and reliable operation across extended temperature ranges.

Substiute Parts

TWM3J68R

OhmiteIn Stock: 1048TWM3J68R Datasheet

Current PartRFQ

TWM3J68RE

OhmiteIn Stock: 844TWM3J68RE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TWM3J68R is based on strict equivalence across all critical electrical and mechanical parameters. The substitute part must maintain identical specifications in resistance value, tolerance, power rating, composition type, package configuration, and thermal characteristics. The TWM3J68R and its substitute share the same series designation, physical footprint, and operational envelope, ensuring direct compatibility in existing circuit designs and PCB layouts.

Key Parameters for Substitution:

• Resistance: 68 Ohms
• Tolerance: ±5%
• Power Rating: 3W
• Composition: Metal Oxide Film
• Package: Radial
• Operating Temperature: -55°C to 275°C
• Physical Dimensions: 0.492" L x 0.354" W (12.50mm x 9.00mm)

Parameter Comparison

Engineering Selection Recommendations

The TWM3J68RE serves as the direct equivalent for the obsolete TWM3J68R. Both components are manufactured by Ohmite and maintain identical electrical and mechanical specifications across all critical parameters. The primary distinction is product status: the TWM3J68R is obsolete, while the TWM3J68RE is active and currently in production.

An additional consideration is regulatory compliance. The TWM3J68RE achieves ROHS3 compliance, whereas the TWM3J68R is RoHS non-compliant. For applications subject to RoHS directives or environmental regulations, the TWM3J68RE is the appropriate selection. Both components share identical REACH and ECCN classifications, ensuring consistent export and supply chain handling.

Frequently Asked Questions (FAQ)

Q: Can TWM3J68RE directly replace TWM3J68R in existing designs? A: Yes. The TWM3J68RE is electrically and mechanically identical to the TWM3J68R. All electrical parameters, physical dimensions, and thermal characteristics are equivalent, enabling direct substitution without circuit redesign or PCB layout modification.

Q: What is the primary reason for substitution? A: The TWM3J68R is obsolete and no longer in production. The TWM3J68RE is the active equivalent from the same manufacturer, ensuring continued component availability and supply chain reliability.

Q: Are there packaging differences between these parts? A: The TWM3J68R is supplied in standard packaging, while the TWM3J68RE is supplied in bulk packaging. Both maintain identical component specifications and radial package configuration. Packaging format does not affect electrical or mechanical performance.

Q: Does RoHS compliance affect circuit performance? A: No. RoHS compliance relates to material composition and environmental regulations, not electrical performance. Both the TWM3J68R and TWM3J68RE deliver identical electrical characteristics. The TWM3J68RE's ROHS3 compliance makes it suitable for applications with regulatory requirements.

Q: Are the physical dimensions identical? A: Yes. Both components measure 0.492" L x 0.354" W (12.50mm x 9.00mm) with a maximum seated height of 1.024" (26.00mm). PCB footprints and mounting requirements are identical.