TWM3J4K3 Equivalent & Substitute Parts

Part Overview

The TWM3J4K3 is a 4.3 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

TWM3J4K3

OhmiteIn Stock: 1049TWM3J4K3 Datasheet

Current PartRFQ

TWM3J4K3E

OhmiteIn Stock: 923TWM3J4K3E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TWM3J4K3 is determined by strict equivalence across the following critical parameters:

• Resistance value: 4.3 kOhms
• Tolerance: ±5%
• Power rating: 3W
• Composition: Metal Oxide Film
• Package configuration: Radial with 2 terminations
• Physical dimensions: 0.492" L x 0.354" W, height 1.024" maximum
• Operating temperature range: -55°C ~ 275°C
• Temperature coefficient: ±350ppm/°C

The TWM3J4K3E meets all these criteria and is classified as a direct substitute. Both parts are manufactured by Ohmite within the same TWM series, ensuring mechanical and electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The TWM3J4K3E is the direct equivalent substitute for the obsolete TWM3J4K3. Both parts maintain identical electrical and mechanical specifications across all critical parameters including resistance, tolerance, power rating, temperature range, and physical dimensions.

The primary distinction between the two parts is product status and regulatory compliance. The TWM3J4K3E is currently in active production status, ensuring availability for new designs and replacement applications. Additionally, the TWM3J4K3E achieves ROHS3 compliance, whereas the original TWM3J4K3 is RoHS non-compliant. This compliance improvement makes the substitute part suitable for applications subject to RoHS regulations.

Both parts maintain REACH Unaffected status and carry the same ECCN (EAR99) and HTSUS (8533.21.0090) classifications, confirming regulatory equivalence for export and trade purposes.

Frequently Asked Questions (FAQ)

Q: Can the TWM3J4K3E be used as a direct replacement for the TWM3J4K3?

A: Yes. The TWM3J4K3E is electrically and mechanically equivalent to the TWM3J4K3. All critical parameters including resistance value, tolerance, power rating, composition, package type, dimensions, and operating temperature range are identical. The parts are interchangeable in circuit applications.

Q: What is the difference between the TWM3J4K3 and TWM3J4K3E?

A: The primary differences are product status and RoHS compliance. The TWM3J4K3 is obsolete and RoHS non-compliant, while the TWM3J4K3E is in active production and ROHS3 compliant. Electrically and mechanically, the parts are identical.

Q: Are there any packaging differences between these parts?

A: The TWM3J4K3E is supplied in bulk packaging, whereas the original TWM3J4K3 packaging specification is not provided. Both parts use the same radial package configuration with identical physical dimensions.

Q: Will the TWM3J4K3E fit in the same PCB footprint as the TWM3J4K3?

A: Yes. Both parts have identical dimensions: 0.492" length x 0.354" width with a maximum seated height of 1.024". The radial lead configuration and termination count (2) are identical, ensuring compatibility with existing PCB layouts.

Q: Is the TWM3J4K3E suitable for high-temperature applications?

A: Yes. The TWM3J4K3E maintains the same operating temperature range as the original part: -55°C to 275°C. The temperature coefficient is ±350ppm/°C for both parts.

Q: Does the RoHS3 compliance of the TWM3J4K3E affect circuit performance?

A: No. RoHS3 compliance is a regulatory and material composition requirement that does not alter the electrical performance or specifications of the component. The TWM3J4K3E delivers identical electrical characteristics to the TWM3J4K3.