SST-40-WCS-F50-N3650 Equivalent & Substitute Parts

Part Overview

The SST-40-WCS-F50-N3650 is a surface-mount LED from Luminus Devices Inc. in the SST-40-W series, delivering cool white light at 6500K color temperature. This component is actively produced and widely used in lighting applications requiring high luminous efficacy and standardized thermal characteristics. The substitute part SST-40-WCS-F50-N4651 shares identical electrical and optical specifications but differs in packaging format and product status, making it relevant for applications where packaging flexibility or inventory sourcing is a consideration.

Substiute Parts

SST-40-WCS-F50-N3650

Luminus Devices Inc.In Stock: 1162SST-40-WCS-F50-N3650 Datasheet

Current PartRFQ

SST-40-WCS-F50-N4651

Luminus Devices Inc.In Stock: 1089SST-40-WCS-F50-N4651 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The SST-40-WCS-F50-N4651 qualifies as a parametric equivalent to the SST-40-WCS-F50-N3650 based on the following criteria:

Identical Electrical Specifications:

• Forward voltage: 2.75V (Typ)
• Test current: 700mA
• Maximum current: 5A

Identical Optical Specifications:

• Color temperature: 6500K
• Luminous flux @ 85°C: 310lm (Typ)
• Luminous efficacy: 161 lm/W
• Color Rendering Index: 70 (Typ)
• Viewing angle: 120°

Identical Mechanical Specifications:

• Package: 2020 (5050 Metric)
• Thermal resistance: 2.5°C/W
• Mounting type: Surface Mount

Difference:

• Packaging format: SST-40-WCS-F50-N3650 supplied in Tape & Reel (TR); SST-40-WCS-F50-N4651 supplied in Cut Tape (CT)

Parameter Comparison

Engineering Selection Recommendations

SST-40-WCS-F50-N3650 (Primary Selection):

• Active product status ensures ongoing manufacturer support and availability
• Tape & Reel packaging is standard for high-volume automated assembly processes
• ROHS3 compliant and REACH unaffected for regulatory compliance

SST-40-WCS-F50-N4651 (Alternative Selection):

• Identical electrical, optical, and thermal performance
• Cut Tape packaging suitable for lower-volume or manual assembly operations
• Obsolete product status indicates limited future availability; use only when primary part is unavailable
• Existing inventory of 1028 units available

Selection between these parts should be based on packaging requirements and assembly process compatibility, not performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can SST-40-WCS-F50-N4651 be used as a direct replacement for SST-40-WCS-F50-N3650?

A: Yes, from an electrical and optical standpoint. Both parts have identical forward voltage, current ratings, luminous flux, color temperature, and thermal characteristics. The only difference is packaging format: Tape & Reel versus Cut Tape. Compatibility depends on your assembly equipment and process requirements.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging is continuous tape on a reel, optimized for automated pick-and-place assembly at high volumes. Cut Tape (CT) packaging is pre-cut segments of tape, suitable for lower-volume production or manual assembly. Both contain the same component.

Q: Why is SST-40-WCS-F50-N4651 marked as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production. The part may still be available from existing inventory, but future availability is not guaranteed. For new designs, SST-40-WCS-F50-N3650 (Active status) is the recommended choice.

Q: Are there any thermal or performance differences between these parts?

A: No. Both parts have identical thermal resistance (2.5°C/W), forward voltage (2.75V), luminous flux (310lm @ 85°C), and all other electrical and optical specifications.

Q: Which part should I specify for a new design?

A: Specify SST-40-WCS-F50-N3650. Active product status ensures long-term availability and manufacturer support. Use SST-40-WCS-F50-N4651 only as a secondary option if the primary part becomes unavailable.