TWW3J4R3 Equivalent & Substitute Parts

Part Overview

The TWW3J4R3 is a 4.3 Ohm ±5% 3W through-hole wirewound resistor manufactured by Ohmite in radial configuration. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing production and maintenance applications. The part features flame-proof and safety-rated construction suitable for industrial and safety-critical circuits operating across a wide temperature range from -55°C to 275°C.

Substiute Parts

TWW3J4R3

OhmiteIn Stock: 896TWW3J4R3 Datasheet

Current PartRFQ

TWW3J4R3E

OhmiteIn Stock: 1067TWW3J4R3E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TWW3J4R3 is determined by strict equivalence across the following critical parameters:

• Resistance value: 4.3 Ohms
• Tolerance: ±5%
• Power rating: 3W
• Composition: Wirewound
• Package configuration: Radial
• Safety features: Flame Proof, Safety rated
• Temperature coefficient: ±400ppm/°C
• Operating temperature range: -55°C to 275°C
• Physical dimensions and termination count

The TWW3J4R3E meets all these criteria as a parametric equivalent, differing only in product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The TWW3J4R3E is the direct parametric equivalent for the obsolete TWW3J4R3. Both components share identical electrical specifications, mechanical dimensions, and safety features. The primary distinction is product status: the TWW3J4R3E is actively manufactured and carries ROHS3 compliance certification, whereas the original part is obsolete and RoHS non-compliant.

For new designs and production continuity, the TWW3J4R3E is the appropriate selection. For legacy systems requiring the exact original part, limited inventory of the TWW3J4R3 remains available (849 pcs in stock), though the TWW3J4R3E offers superior long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can TWW3J4R3E be used as a direct replacement for TWW3J4R3?

A: Yes. The TWW3J4R3E is a parametric equivalent with identical electrical and mechanical specifications. Both components feature 4.3 Ohm resistance, ±5% tolerance, 3W power rating, wirewound construction, radial package, and identical physical dimensions.

Q: What is the difference between TWW3J4R3 and TWW3J4R3E?

A: The TWW3J4R3E is the active production variant. Key differences include product status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. RoHS non-compliant). All electrical and mechanical parameters are identical.

Q: Are there any packaging differences?

A: The TWW3J4R3 is supplied in standard packaging, while the TWW3J4R3E is supplied in bulk packaging. Both maintain identical component specifications and radial configuration.

Q: What compliance certifications apply to these parts?

A: Both parts carry REACH Unaffected status and EAR99 ECCN classification. The TWW3J4R3E additionally carries ROHS3 compliance certification, making it suitable for applications with RoHS 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). They are mechanically interchangeable in PCB layouts and through-hole applications.