TWW3J2R7 Equivalent & Substitute Parts

Part Overview

The TWW3J2R7 is a 2.7 Ohm ±5% 3W through-hole wirewound resistor with radial leads, manufactured by Ohmite. This component features flame-proof and safety-rated construction, designed for applications requiring robust thermal performance across a wide operating temperature range of -55°C to 275°C. The part is currently classified as obsolete, making identification of compatible substitutes essential for ongoing system support and component procurement.

Substiute Parts

TWW3J2R7

OhmiteIn Stock: 710TWW3J2R7 Datasheet

Current PartRFQ

TWW3J2R7E

OhmiteIn Stock: 673TWW3J2R7E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TWW3J2R7 is determined by strict equivalence across the following critical parameters:

• Resistance value: 2.7 Ohms
• Tolerance: ±5%
• Power rating: 3W
• Composition: Wirewound
• Package configuration: Radial with 2 terminations
• Physical dimensions: 0.492" L x 0.354" W, height 1.024" maximum
• Temperature coefficient: ±400ppm/°C
• Operating temperature range: -55°C ~ 275°C
• Safety and flame-proof features

The TWW3J2R7E qualifies as a direct substitute, maintaining identical electrical specifications and mechanical form factor while offering improved product status and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The TWW3J2R7E is the direct equivalent for the obsolete TWW3J2R7. Both components share identical electrical and mechanical specifications, ensuring pin-for-pin and form-factor compatibility. The primary distinction is product status and regulatory compliance: the TWW3J2R7E is currently in active production and meets ROHS3 compliance requirements, whereas the original part is obsolete and RoHS non-compliant. For new designs or component replenishment, the TWW3J2R7E is the appropriate selection. Both parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can TWW3J2R7E be used as a direct replacement for TWW3J2R7?

A: Yes. The TWW3J2R7E is electrically and mechanically identical to the TWW3J2R7. Both components have the same resistance value (2.7 Ohms), tolerance (±5%), power rating (3W), temperature coefficient (±400ppm/°C), operating temperature range (-55°C ~ 275°C), and radial package dimensions. No circuit modifications are required.

Q: What is the difference between TWW3J2R7 and TWW3J2R7E?

A: The TWW3J2R7E is the active production variant of the obsolete TWW3J2R7. The substitute part achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. All electrical and mechanical parameters remain identical.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both the TWW3J2R7 and TWW3J2R7E 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 fully compatible in existing PCB layouts.

Q: Does the TWW3J2R7E meet current regulatory requirements?

A: The TWW3J2R7E is ROHS3 compliant and REACH Unaffected. Both parts carry EAR99 export classification. The substitute part meets current regulatory standards for new component procurement.

Q: Can these parts be used interchangeably in high-temperature applications?

A: Yes. Both components are rated for the same operating temperature range of -55°C to 275°C with identical temperature coefficient specifications (±400ppm/°C). They are fully interchangeable for thermal performance requirements.