WW3JT75R0 Equivalent & Substitute Parts

Part Overview

The WW3JT75R0 is a 75 Ohm, 3W through-hole axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is designed for applications requiring precision resistance with moisture resistance and high-temperature stability. The part maintains Active product status with 894 units in current inventory. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to component availability, supply chain considerations, or application-specific packaging needs.

Substiute Parts

WW3JT75R0

Stackpole Electronics IncIn Stock: 924WW3JT75R0 Datasheet

Current PartRFQ

45J75RE

OhmiteIn Stock: 80545J75RE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute part identification for the WW3JT75R0 is based on the following critical parameters that must remain constant or compatible:

• Resistance Value: 75 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Composition: Wirewound (exact match required)
• Package Type: Axial (exact match required)
• Temperature Coefficient: ±20ppm/°C (exact match required)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement maintained)

The substitute part 45J75RE from Ohmite meets all critical electrical parameters. The primary difference is the power rating increase from 3W to 5W, which represents a design upgrade that maintains backward compatibility while providing additional thermal margin. Both parts share identical resistance, tolerance, composition, package configuration, and temperature coefficient specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the WW3JT75R0 and 45J75RE maintain Active product status and full ROHS3 compliance. Selection between these parts should be based on application requirements:

The WW3JT75R0 is appropriate for space-constrained applications where the smaller physical dimensions (4.75mm diameter) are required and the 3W power dissipation is sufficient for the circuit design.

The 45J75RE is suitable when higher power dissipation capability (5W) is beneficial or when the larger physical dimensions (8.70mm diameter) do not present a constraint. The increased power rating provides additional thermal margin without changing electrical performance characteristics.

Both parts are suitable for high-temperature applications up to 350°C and maintain identical resistance stability across the operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the 45J75RE replace the WW3JT75R0 in all applications?

A: The 45J75RE is electrically equivalent in resistance, tolerance, and temperature coefficient. The primary consideration is physical size. The 45J75RE is larger (8.70mm diameter vs 4.75mm diameter) and has a higher power rating (5W vs 3W). If board space permits the larger component, the 45J75RE is compatible. If space is constrained, the WW3JT75R0 must be used.

Q: What is the significance of the power rating difference?

A: The 3W rating of the WW3JT75R0 and 5W rating of the 45J75RE indicate maximum continuous power dissipation capability. Both parts will function identically at power levels below 3W. The 45J75RE provides additional thermal capacity for applications requiring higher power dissipation at the same resistance value.

Q: Are there packaging differences between these parts?

A: Yes. The WW3JT75R0 is supplied in Tape & Reel (TR) format, while the 45J75RE is supplied in Bulk packaging. This affects procurement and handling procedures but does not impact electrical performance or mechanical compatibility in the circuit.

Q: Do both parts meet the same compliance standards?

A: Both the WW3JT75R0 and 45J75RE are ROHS3 Compliant and carry EAR99 ECCN classification. Both are REACH Unaffected. Compliance requirements are identical between the two parts.

Q: What is the temperature coefficient significance?

A: Both parts share an identical temperature coefficient of ±20ppm/°C, meaning resistance variation with temperature is identical. This ensures predictable circuit behavior across the full operating temperature range of -55°C to 350°C.