TWW3JR33 Equivalent & Substitute Parts

Part Overview

The TWW3JR33 is a 330 mOhms ±5% 3W through-hole wirewound resistor in radial configuration, manufactured by Ohmite. This component is classified as obsolete, with 701 units currently in stock. Due to its obsolete status, identifying equivalent and substitute parts is necessary for ongoing design support, maintenance, and production continuity. The TWW3JR33E represents the active production equivalent with identical electrical and mechanical specifications.

Substiute Parts

TWW3JR33

OhmiteIn Stock: 743TWW3JR33 Datasheet

Current PartRFQ

TWW3JR33E

OhmiteIn Stock: 936TWW3JR33E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TWW3JR33 is determined by strict equivalence across the following critical parameters:

• Resistance value: 330 mOhms
• Tolerance: ±5%
• Power rating: 3W
• Composition: Wirewound
• Package configuration: Radial
• Temperature coefficient: ±400ppm/°C
• Operating temperature range: -55°C to 275°C
• Physical dimensions: 0.492" L x 0.354" W (12.50mm x 9.00mm)
• Height - Seated (Max): 1.024" (26.00mm)
• Number of terminations: 2
• Features: Flame Proof, Safety

The TWW3JR33E is classified as a direct substitute because it maintains identical electrical characteristics, mechanical form factor, and functional features as the original part.

Parameter Comparison

Engineering Selection Recommendations

The TWW3JR33E is the direct production equivalent for the obsolete TWW3JR33. Both parts are manufactured by Ohmite and share identical electrical and mechanical specifications. The primary distinction is product status and regulatory compliance: the TWW3JR33E is currently in active production and is ROHS3 compliant, whereas the original TWW3JR33 is obsolete and RoHS non-compliant.

For new designs and ongoing production, the TWW3JR33E is the appropriate selection. For legacy systems currently using the TWW3JR33, the TWW3JR33E provides direct functional and mechanical compatibility without circuit redesign or PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can the TWW3JR33E be used as a direct replacement for the TWW3JR33?

A: Yes. The TWW3JR33E is electrically and mechanically identical to the TWW3JR33. Both components have the same resistance value (330 mOhms), tolerance (±5%), power rating (3W), temperature coefficient (±400ppm/°C), operating temperature range (-55°C to 275°C), and radial package dimensions (0.492" L x 0.354" W, 1.024" max height).

Q: What is the primary reason to transition from TWW3JR33 to TWW3JR33E?

A: The TWW3JR33 is classified as obsolete. The TWW3JR33E is the active production equivalent, ensuring long-term availability and supply chain continuity. Additionally, the TWW3JR33E is ROHS3 compliant, whereas the original part is RoHS non-compliant.

Q: Are there any physical or dimensional differences between these parts?

A: No. Both parts 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 configuration resistors with two terminations.

Q: Will the TWW3JR33E fit existing PCB layouts designed for the TWW3JR33?

A: Yes. The identical radial package configuration and physical dimensions ensure direct PCB compatibility without layout modification.

Q: What is the difference in packaging between the two parts?

A: The TWW3JR33 packaging designation is listed as "-" (unspecified), while the TWW3JR33E is supplied in bulk packaging. This does not affect electrical or mechanical performance.