WW3JB1K50 Equivalent & Substitute Parts

Part Overview

The WW3JB1K50 is a 1.5 kOhms ±5% 3W axial wirewound through-hole resistor manufactured by Stackpole Electronics Inc. This component is designed for applications requiring moisture-resistant wirewound construction with stable performance across extended temperature ranges. The part maintains Active product status with 941 units currently in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this resistor category.

Substiute Parts

WW3JB1K50

Stackpole Electronics IncIn Stock: 977WW3JB1K50 Datasheet

Current PartRFQ

45J1K5E

OhmiteIn Stock: 73045J1K5E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The 45J1K5E from Ohmite qualifies as a substitute for the WW3JB1K50 based on the following criteria:

Matching Parameters:

• Resistance value: 1.5 kOhms (identical)
• Tolerance: ±5% (identical)
• Composition: Wirewound (identical)
• Package: Axial (identical)
• Temperature Coefficient: ±20ppm/°C (identical)
• Number of Terminations: 2 (identical)

Allowable Variance:

• Power Rating: 45J1K5E is rated at 5W versus 3W for WW3JB1K50. Higher power rating is acceptable for direct substitution as it provides equivalent or superior performance capability in the same package category.
• Operating Temperature Range: 45J1K5E operates -55°C ~ 275°C versus -55°C ~ 350°C for WW3JB1K50. The substitute maintains the lower temperature limit and covers standard industrial operating ranges.

Parameter Comparison

Engineering Selection Recommendations

The 45J1K5E serves as a direct electrical substitute for the WW3JB1K50 when circuit requirements permit the higher power rating and physical size increase. Both components maintain Active product status and comply with RoHS regulations. The 45J1K5E provides 698 units in current inventory.

Selection between these parts depends on circuit board layout constraints and thermal management requirements. The WW3JB1K50 occupies a smaller footprint (4.75mm diameter), while the 45J1K5E (8.70mm diameter) accommodates higher power dissipation. The WW3JB1K50 extends to 350°C maximum operating temperature, whereas the 45J1K5E is rated to 275°C. Applications operating above 275°C require the original WW3JB1K50 specification.

Frequently Asked Questions (FAQ)

Q: Can the 45J1K5E replace the WW3JB1K50 in all applications?

A: The 45J1K5E is electrically equivalent for resistance, tolerance, and temperature coefficient. However, physical dimensions differ significantly. Verify that the larger package (8.70mm diameter versus 4.75mm) fits within available board space. If the application operates above 275°C, the WW3JB1K50 is required.

Q: What is the significance of the higher power rating on the 45J1K5E?

A: The 5W rating on the 45J1K5E versus 3W on the WW3JB1K50 indicates greater power dissipation capability. This does not change the resistor's electrical behavior in the circuit but provides additional thermal margin. Use the 45J1K5E when circuit power dissipation approaches or exceeds 3W.

Q: Are both parts RoHS compliant?

A: Yes. The WW3JB1K50 is ROHS3 Compliant, and the 45J1K5E is RoHS Compliant. Both meet regulatory requirements for lead-free construction.

Q: How do the physical dimensions affect circuit design?

A: The WW3JB1K50 (4.75mm diameter) is suitable for compact layouts. The 45J1K5E (8.70mm diameter) requires additional board space but may be necessary for applications requiring the 5W power rating or when the original part is unavailable.

Q: What is the temperature coefficient significance?

A: Both parts share an identical temperature coefficient of ±20ppm/°C, ensuring consistent resistance stability across temperature variations. This parameter is critical for precision circuits and temperature-compensated applications.