TWM5J68R Equivalent & Substitute Parts

Part Overview

The TWM5J68R is a 68 Ohm, 5% tolerance, 5W through-hole resistor manufactured by Ohmite in the TWM series. This component is a metal oxide film resistor with flame-proof and safety features, designed for radial lead configuration. The part is currently listed as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity.

Substiute Parts

TWM5J68R

OhmiteIn Stock: 995TWM5J68R Datasheet

Current PartRFQ

TWM5J68RE

OhmiteIn Stock: 1783TWM5J68RE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TWM5J68R is determined by strict equivalence across the following parameters:

• Resistance value: 68 Ohms
• Tolerance: ±5%
• Power rating: 5W
• Composition: Metal Oxide Film
• Package configuration: Radial lead
• Operating temperature range: -55°C to 275°C
• Temperature coefficient: ±350ppm/°C
• Physical dimensions and height specifications

The TWM5J68RE meets all these criteria and is classified as a direct substitute. The primary distinction between the main part and substitute is product status and packaging configuration, not electrical or mechanical performance.

Parameter Comparison

Engineering Selection Recommendations

The TWM5J68RE is the direct equivalent for the obsolete TWM5J68R. Both components share identical electrical specifications, mechanical dimensions, and thermal characteristics. The TWM5J68RE is currently in active production status with improved regulatory compliance, specifically ROHS3 certification compared to the non-compliant status of the original part. For new designs or production continuity, the TWM5J68RE is the appropriate selection. Packaging differs between the two parts (the substitute is supplied in bulk configuration), but this does not affect component performance or circuit compatibility.

Frequently Asked Questions (FAQ)

Q: Can TWM5J68RE be used as a direct replacement for TWM5J68R in existing designs?

A: Yes. The TWM5J68RE is electrically and mechanically identical to the TWM5J68R. All critical parameters—resistance, tolerance, power rating, temperature range, and physical dimensions—are equivalent. The substitute can be used without circuit modification.

Q: What is the difference between TWM5J68R and TWM5J68RE?

A: The primary differences are product status and packaging. The TWM5J68R is obsolete and supplied with specific packaging, while the TWM5J68RE is active production and supplied in bulk. The TWM5J68RE also carries ROHS3 compliance, whereas the original part is RoHS non-compliant. Electrical and mechanical performance are identical.

Q: Are the physical dimensions identical between the two parts?

A: Yes. Both the TWM5J68R and TWM5J68RE have identical dimensions: 0.492" L x 0.354" W (12.50mm x 9.00mm) with a maximum seated height of 1.024" (26.00mm). They are both radial lead components with two terminations and will fit the same PCB footprint.

Q: Does the RoHS compliance difference affect circuit performance?

A: No. RoHS compliance relates to material composition and environmental regulations, not electrical performance. Both parts meet the same electrical and thermal specifications and will perform identically in circuit applications.

Q: Can I use these resistors in high-temperature applications?

A: Yes. Both the TWM5J68R and TWM5J68RE are rated for operating temperatures from -55°C to 275°C with a temperature coefficient of ±350ppm/°C, making them suitable for high-temperature environments within these limits.