TWW3JR75 Equivalent & Substitute Parts

Part Overview

The TWW3JR75 is a 750 mOhms ±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 system support and new production builds. The part features flame-proof and safety-rated construction suitable for industrial and high-reliability applications requiring precision current-limiting or load-balancing functions.

Substiute Parts

TWW3JR75

OhmiteIn Stock: 1214TWW3JR75 Datasheet

Current PartRFQ

TWW3JR75E

OhmiteIn Stock: 983TWW3JR75E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TWW3JR75 is determined by strict equivalence across the following critical parameters:

• Resistance value: 750 mOhms
• Tolerance: ±5%
• Power rating: 3W
• Composition: Wirewound
• Package configuration: Radial
• Operating temperature range: -55°C to 275°C minimum
• Temperature coefficient: ±400 ppm/°C
• Physical dimensions: 12.50mm × 9.00mm × 26.00mm (max)
• Termination count and style: 2 radial leads
• Safety and flame-proof features: Required

The TWW3JR75E meets all substitution criteria as a direct equivalent manufactured by Ohmite within the same TWW series, maintaining identical electrical and mechanical specifications while offering improved product status and compliance posture.

Parameter Comparison

Engineering Selection Recommendations

The TWW3JR75E is the direct substitute for the obsolete TWW3JR75. Both components are electrically and mechanically identical across all specified parameters. The primary distinction is product lifecycle status: the TWW3JR75E is actively manufactured and carries ROHS3 compliance certification, whereas the original part is obsolete and non-compliant with current environmental regulations.

For new designs and production continuity, the TWW3JR75E should be selected. For legacy system repairs where original part specifications must be maintained, the TWW3JR75E provides full functional equivalence with the added benefit of regulatory compliance and ongoing availability.

Frequently Asked Questions (FAQ)

Q: Can TWW3JR75E be used as a direct replacement for TWW3JR75 in existing circuits?

A: Yes. The TWW3JR75E is electrically and mechanically identical to the TWW3JR75 across all critical parameters including resistance, tolerance, power rating, temperature range, and physical dimensions. No circuit modifications are required.

Q: What is the significance of the product status difference?

A: The TWW3JR75 is classified as obsolete, indicating Ohmite no longer manufactures this part number. The TWW3JR75E is active production, ensuring long-term availability and supply chain reliability.

Q: Does RoHS compliance affect circuit performance?

A: RoHS compliance relates to material composition and environmental regulations, not electrical performance. The TWW3JR75E maintains identical electrical characteristics to the original part while meeting current environmental standards.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 12.50mm length × 9.00mm width with a maximum seated height of 26.00mm. PCB footprints and mechanical mounting are identical.

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

A: Yes. Both parts operate across the identical temperature range of -55°C to 275°C with the same temperature coefficient of ±400 ppm/°C, maintaining specification compliance in extreme thermal environments.