TWM3J4K7 Equivalent & Substitute Parts

Part Overview

The TWM3J4K7 is a 4.7 kOhms ±5% 3W through-hole resistor with radial leads, manufactured by Ohmite using metal oxide film composition. This component features flame-proof and safety characteristics suitable for industrial and high-reliability applications. The part is currently obsolete, making identification of compatible substitutes essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

TWM3J4K7

OhmiteIn Stock: 936TWM3J4K7 Datasheet

Current PartRFQ

TWM3J4K7E

OhmiteIn Stock: 1128TWM3J4K7E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TWM3J4K7 is determined by strict equivalence across the following critical parameters:

• Resistance value: 4.7 kOhms
• Tolerance: ±5%
• Power rating: 3W
• Composition: Metal Oxide Film
• Package configuration: Radial with 2 terminations
• Temperature coefficient: ±350ppm/°C
• Operating temperature range: -55°C to 275°C
• Physical dimensions: 0.492" L x 0.354" W with maximum seated height of 1.024"

The TWM3J4K7E meets all these criteria and is classified as a direct substitute. Packaging differences (tape and reel versus bulk) do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The TWM3J4K7E is the direct substitute for the obsolete TWM3J4K7. Both components are manufactured by Ohmite within the TWM series and share identical electrical and mechanical specifications. The primary distinction is product status: the original part is obsolete while the substitute remains in active production.

For applications requiring RoHS3 compliance, the TWM3J4K7E is the appropriate selection. Both parts maintain REACH Unaffected status and share the same ECCN and HTSUS classifications, ensuring regulatory consistency across supply chain transitions.

Frequently Asked Questions (FAQ)

Q: Can TWM3J4K7E be used as a direct replacement for TWM3J4K7?

A: Yes. The TWM3J4K7E is electrically and mechanically identical to the TWM3J4K7. All critical parameters—resistance, tolerance, power rating, composition, temperature characteristics, and physical dimensions—are equivalent. The substitute is suitable for direct board-level replacement without circuit modification.

Q: What is the difference between TWM3J4K7 and TWM3J4K7E?

A: The primary differences are product status and RoHS compliance. The TWM3J4K7 is obsolete and RoHS non-compliant, while the TWM3J4K7E is active production and ROHS3 compliant. Electrical and mechanical specifications are identical.

Q: Are there packaging differences between these parts?

A: The TWM3J4K7 is supplied in standard packaging, while the TWM3J4K7E is available in bulk packaging. Packaging format does not affect component performance or board compatibility.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is based on matching resistance value (4.7 kOhms), tolerance (±5%), power rating (3W), composition (metal oxide film), radial package configuration, temperature coefficient (±350ppm/°C), operating temperature range (-55°C to 275°C), and physical dimensions (0.492" L x 0.354" W, 1.024" max height).

Q: Is the TWM3J4K7E suitable for applications requiring RoHS compliance?

A: Yes. The TWM3J4K7E is ROHS3 compliant, making it appropriate for applications with RoHS requirements. The original TWM3J4K7 is RoHS non-compliant.