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SST-40-WCS-F50-N3702 LED Equivalent & Substitute Parts
Part Overview
The SST-40-WCS-F50-N3702 is a surface-mount LED from Luminus Devices Inc. in the SST-40-W series, specified for cool white lighting at 7000K color temperature. This part carries a "Not For New Designs" product status, indicating it has been superseded in the manufacturer's product line. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and access active production alternatives with compatible electrical and mechanical characteristics.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SST-40-WCS-F50-N3702 |
| Manufacturer | Luminus Devices Inc. |
| Series | SST-40-W |
| Color | White, Cool |
| CCT (K) | 7000K |
| Forward Voltage (Vf) Typical | 2.75V |
| Test Current | 700mA |
| Maximum Current | 5A |
| Flux @ 85°C, Test Current | 310lm (Typ) |
| Lumens/Watt @ Test Current | 161 lm/W |
| CRI (Color Rendering Index) | 70 (Typ) |
| Viewing Angle | 120° |
| Package / Case | 2020 (5050 Metric) |
| Mounting Type | Surface Mount |
| Size / Dimension | 0.195" L x 0.195" W (4.95mm x 4.95mm) |
| Height - Seated (Max) | 0.113" (2.86mm) |
| Thermal Resistance of Package | 2.5°C/W |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| REACH Status | REACH Unaffected |
| Packaging | Tape & Reel (TR) |
| Product Status | Not For New Designs |
Substitute Part Grouping Explanation
Substitution eligibility for the SST-40-WCS-F50-N3702 is determined by the following critical parameters:
Electrical Compatibility:
- Forward Voltage (Vf): 2.75V (Typ)
- Test Current: 700mA
- Maximum Current: 5A
- Flux Output: 310lm @ 85°C (Typ)
- Lumens/Watt: 161 lm/W
- CRI: 70 (Typ)
Optical Compatibility:
- Color: White, Cool
- CCT: 7000K
- Viewing Angle: 120°
Mechanical Compatibility:
- Package / Case: 2020 (5050 Metric)
- Mounting Type: Surface Mount
- Size: 0.195" L x 0.195" W (4.95mm x 4.95mm)
- Height - Seated (Max): 0.113" (2.86mm)
- Thermal Resistance: 2.5°C/W
Regulatory Compliance:
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level: 1 (Unlimited)
- REACH Status: REACH Unaffected
Substitute parts maintain identical electrical performance, optical characteristics, mechanical dimensions, and thermal properties. Variations in packaging format (Tape & Reel vs. Cut Tape) and product status do not affect functional interchangeability in circuit applications.
Parameter Comparison
| Parameter | SST-40-WCS-F50-N3702 | SST-40-WCS-F50-N2700 | SST-40-WCS-F50-N2702 | SST-40-WCS-F50-N2650 | SST-40-WCS-F50-N2651 | SST-40-WCS-F50-N2652 | SST-40-WCS-F50-N3650 | SST-40-WCS-F50-N4650 | SST-40-WCS-F50-N4651 |
|---|---|---|---|---|---|---|---|---|---|
| CCT (K) | 7000K | 7000K | 7000K | 6500K | 6500K | 6500K | 6500K | 6500K | 6500K |
| Forward Voltage (Vf) Typ | 2.75V | 2.75V | 2.75V | 2.75V | 2.75V | 2.75V | 2.75V | 2.75V | 2.75V |
| Test Current | 700mA | 700mA | 700mA | 700mA | 700mA | 700mA | 700mA | 700mA | 700mA |
| Maximum Current | 5A | 5A | 5A | 5A | 5A | 5A | 5A | 5A | 5A |
| Flux @ 85°C, Test Current | 310lm (Typ) | 310lm (Typ) | 310lm (Typ) | 310lm (Typ) | 310lm (Typ) | 310lm (Typ) | 310lm (Typ) | 310lm (Typ) | 310lm (Typ) |
| Lumens/Watt @ Test Current | 161 lm/W | 161 lm/W | 161 lm/W | 161 lm/W | 161 lm/W | 161 lm/W | 161 lm/W | 161 lm/W | 161 lm/W |
| CRI (Color Rendering Index) | 70 (Typ) | 70 (Typ) | 70 (Typ) | 70 (Typ) | 70 (Typ) | 70 (Typ) | 70 (Typ) | 70 (Typ) | 70 (Typ) |
| Viewing Angle | 120° | 120° | 120° | 120° | 120° | 120° | 120° | 120° | 120° |
| Package / Case | 2020 (5050 Metric) | 2020 (5050 Metric) | 2020 (5050 Metric) | 2020 (5050 Metric) | 2020 (5050 Metric) | 2020 (5050 Metric) | 2020 (5050 Metric) | 2020 (5050 Metric) | 2020 (5050 Metric) |
| Size / Dimension | 0.195" L x 0.195" W (4.95mm x 4.95mm) | 0.195" L x 0.195" W (4.95mm x 4.95mm) | 0.195" L x 0.195" W (4.95mm x 4.95mm) | 0.195" L x 0.195" W (4.95mm x 4.95mm) | 0.195" L x 0.195" W (4.95mm x 4.95mm) | 0.195" L x 0.195" W (4.95mm x 4.95mm) | 0.195" L x 0.195" W (4.95mm x 4.95mm) | 0.195" L x 0.195" W (4.95mm x 4.95mm) | 0.195" L x 0.195" W (4.95mm x 4.95mm) |
| Height - Seated (Max) | 0.113" (2.86mm) | 0.113" (2.86mm) | 0.113" (2.86mm) | 0.113" (2.86mm) | 0.113" (2.86mm) | 0.113" (2.86mm) | 0.113" (2.86mm) | 0.113" (2.86mm) | 0.113" (2.86mm) |
| Thermal Resistance of Package | 2.5°C/W | 2.5°C/W | 2.5°C/W | 2.5°C/W | 2.5°C/W | 2.5°C/W | 2.5°C/W | 2.5°C/W | 2.5°C/W |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected |
| Product Status | Not For New Designs | Active | Active | Active | Active | Active | Active | Active | Obsolete |
| Packaging | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) | Cut Tape (CT) |
Engineering Selection Recommendations
Primary Substitutes (Active Product Status, 7000K CCT):
SST-40-WCS-F50-N2700 and SST-40-WCS-F50-N2702 are direct functional equivalents with identical electrical, optical, and mechanical specifications. Both carry Active product status and are available in Tape & Reel packaging. These parts are recommended for new designs and ongoing production requiring 7000K color temperature.
Secondary Substitutes (Active Product Status, 6500K CCT):
SST-40-WCS-F50-N2650, SST-40-WCS-F50-N2651, SST-40-WCS-F50-N2652, SST-40-WCS-F50-N3650, and SST-40-WCS-F50-N4650 are functionally equivalent with the exception of color temperature specification at 6500K. All maintain identical electrical performance, mechanical dimensions, and thermal characteristics. These parts carry Active product status and are available in Tape & Reel packaging. Selection of 6500K variants is appropriate where color temperature requirements permit.
Obsolete Substitute (Cut Tape Packaging):
SST-40-WCS-F50-N4651 is functionally equivalent but carries Obsolete product status and is supplied in Cut Tape packaging rather than Tape & Reel. This part is suitable only for legacy applications or where existing inventory must be consumed. For new designs and ongoing production, Active status alternatives are preferred.
All substitute parts comply with ROHS3 and REACH requirements, carry MSL 1 (Unlimited) moisture sensitivity rating, and maintain identical thermal resistance characteristics.
Frequently Asked Questions (FAQ)
Q: Can SST-40-WCS-F50-N3702 be replaced with 6500K variants?
A: Yes. Parts SST-40-WCS-F50-N2650, SST-40-WCS-F50-N2651, SST-40-WCS-F50-N2652, SST-40-WCS-F50-N3650, and SST-40-WCS-F50-N4650 are electrically and mechanically identical. The difference is color temperature: 6500K versus 7000K. Selection depends on application color temperature requirements.
Q: What is the difference between Tape & Reel and Cut Tape packaging?
A: Tape & Reel packaging is supplied on continuous carrier tape wound on reels, suitable for automated pick-and-place assembly. Cut Tape packaging is supplied in shorter tape segments, typically for manual assembly or lower-volume applications. Electrical and mechanical specifications are identical; packaging format affects handling and assembly process only.
Q: Why is SST-40-WCS-F50-N3702 marked "Not For New Designs"?
A: This designation indicates the part has been superseded by newer alternatives in the manufacturer's product line. Active status alternatives (SST-40-WCS-F50-N2700, SST-40-WCS-F50-N2702) are recommended for new designs to ensure long-term supply availability and manufacturer support.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts carry ROHS3 Compliant status and REACH Unaffected designation, meeting current regulatory requirements for electronic components.
Q: Can SST-40-WCS-F50-N4651 be used in production?
A: SST-40-WCS-F50-N4651 is functionally equivalent but carries Obsolete product status. While electrically and mechanically compatible, it is not recommended for new production. Active status alternatives should be prioritized for supply chain continuity.
Q: Do all substitute parts have the same thermal resistance?
A: Yes. All substitute parts maintain 2.5°C/W thermal resistance of package, ensuring identical thermal performance in circuit applications.
Q: What is the moisture sensitivity level for these parts?
A: All parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling procedures apply without special moisture control requirements.
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