Equivalent & Substitute Parts for TWW3JR56

Part Overview

The TWW3JR56 is a 560 mOhms ±5% 3W through-hole wirewound resistor manufactured by Ohmite in the TWW series. This radial component features flame-proof and safety construction suitable for high-power applications requiring low-resistance dissipation. The part is currently classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure supply chain availability for new production and field replacements.

Substiute Parts

TWW3JR56

OhmiteIn Stock: 763TWW3JR56 Datasheet

Current PartRFQ

TWW3JR56E

OhmiteIn Stock: 894TWW3JR56E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TWW3JR56 is based on electrical and mechanical parameter equivalence within the Ohmite TWW series. The substitute part TWW3JR56E maintains identical electrical specifications: 560 mOhms resistance value, ±5% tolerance, 3W power rating, and wirewound composition. Both components share the same radial package configuration, physical dimensions, operating temperature range (-55°C to 275°C), and temperature coefficient (±400 ppm/°C). The primary distinction is product status and compliance certification. The TWW3JR56E is the active production equivalent, available in bulk packaging, with RoHS3 compliance certification, whereas the original TWW3JR56 is obsolete and RoHS non-compliant.

Parameter Comparison

Engineering Selection Recommendations

The TWW3JR56E is the direct active equivalent for the obsolete TWW3JR56. Both components are electrically and mechanically identical across all specified parameters, including resistance value, tolerance, power rating, package configuration, and thermal characteristics. The TWW3JR56E is the recommended selection for new designs and production applications due to its active product status and RoHS3 compliance certification. For legacy systems currently using the TWW3JR56, direct substitution with the TWW3JR56E is permissible without circuit redesign, as all functional and dimensional specifications remain unchanged. The transition to the RoHS3-compliant variant aligns with current regulatory requirements and supply chain standards.

Frequently Asked Questions (FAQ)

Q: Can TWW3JR56E be used as a direct replacement for TWW3JR56?

A: Yes. The TWW3JR56E is electrically and mechanically equivalent to the TWW3JR56. Both components have identical resistance values (560 mOhms), tolerance (±5%), power rating (3W), package type (radial), physical dimensions, and operating temperature range (-55°C to 275°C). Direct substitution is permissible without circuit modification.

Q: What is the primary difference between these two parts?

A: The TWW3JR56 is obsolete and RoHS non-compliant, while the TWW3JR56E is an active production part with RoHS3 compliance. All electrical and mechanical specifications are identical.

Q: Are the physical dimensions identical?

A: Yes. Both parts have identical dimensions: 12.50mm length, 9.00mm width, and 26.00mm seated height. The radial package configuration is the same, ensuring compatibility with existing PCB layouts and through-hole mounting patterns.

Q: Does the TWW3JR56E meet current regulatory requirements?

A: Yes. The TWW3JR56E is RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components.

Q: What is the temperature coefficient specification for both parts?

A: Both the TWW3JR56 and TWW3JR56E have a temperature coefficient of ±400 ppm/°C, ensuring consistent resistance stability across the operating temperature range of -55°C to 275°C.