STW9C2SB-NZ LED 3030 White SMD Equivalent & Substitute Parts

Part Overview

The STW9C2SB-NZ is a 3030 form factor white surface mount LED manufactured by Seoul Semiconductor Inc. with a forward voltage of 6.1V at 100mA test current, 120° viewing angle, and CRI of 90. This part is currently listed as obsolete, making identification of active equivalent and substitute parts essential for ongoing production and design continuity. Substitute parts must maintain electrical compatibility across forward voltage, current ratings, and mechanical package specifications to ensure direct board-level replacement without circuit redesign.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	STW9C2SB-NZ	—
Manufacturer	Seoul Semiconductor Inc.	—
Series	3030	—
Color	White	—
Voltage - Forward (Vf) Typical	6.1	V
Current - Test	100	mA
Current - Maximum	200	mA
Viewing Angle	120	°
CRI (Color Rendering Index)	90	—
Package / Case	1212 (3030 Metric)	—
Size / Dimension	3.00 × 3.00	mm
Height - Seated (Max)	0.80	mm
Thermal Resistance of Package	10	°C/W
Mounting Type	Surface Mount	—
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the STW9C2SB-NZ are classified based on strict electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

Package / Case: 1212 (3030 Metric) — identical footprint and mounting interface
Voltage - Forward (Vf) Typical: 6.1V ± tolerance — ensures circuit voltage compatibility
Current - Maximum: 200mA — supports same current handling capability
Viewing Angle: 120° — maintains optical performance characteristics
Mounting Type: Surface Mount — compatible with existing assembly processes
RoHS Status: ROHS3 Compliant — regulatory compliance maintained

Substitute Categories:

Category A: Seoul Semiconductor Inc. 3030 Series (Same Manufacturer) Parts STW8C2SB, STW8C2SB-NZ, STW8C2SB-NZ(DISTY), and STW9C2SB maintain identical package, voltage, current maximum, and viewing angle specifications. These parts differ in CRI (80 vs. 90) and product status (active vs. obsolete), but remain electrically and mechanically interchangeable at the board level.

Category B: ams-OSRAM USA INC. DURIS® S 5 Series Parts GW PSLR31.EM-LR-XX33-1-150-R18 and GW PSLR31.EM-LR-XX35-1-150-R18 share identical package, viewing angle, and maximum current specifications. Forward voltage is 6.2V (0.1V higher than main part) at a higher test current of 150mA. These parts are mechanically compatible but operate at slightly elevated voltage and current levels.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Vf (Typ) [V]	Current - Test [mA]	Current - Max [mA]	Viewing Angle [°]	CRI	Package / Case	Height - Seated (Max) [mm]	Thermal Resistance [°C/W]	Product Status
STW9C2SB-NZ	Seoul Semiconductor Inc.	3030	6.1	100	200	120	90	1212 (3030 Metric)	0.80	10	Obsolete
STW8C2SB	Seoul Semiconductor Inc.	3030	6.1	100	200	120	80	1212 (3030 Metric)	0.80	10	Active
STW8C2SB-NZ	Seoul Semiconductor Inc.	3030	6.1	100	200	120	80	1212 (3030 Metric)	0.80	10	Active
STW8C2SB-NZ(DISTY)	Seoul Semiconductor Inc.	3030	6.1	100	200	120	80	1212 (3030 Metric)	0.80	10	Active
STW9C2SB	Seoul Semiconductor Inc.	3030	6.1	100	200	120	90	1212 (3030 Metric)	0.80	10	Active
GW PSLR31.EM-LR-XX33-1-150-R18	ams-OSRAM USA INC.	DURIS® S 5	6.2	150	200	120	80	1212 (3030 Metric)	0.70	17	Active
GW PSLR31.EM-LR-XX35-1-150-R18	ams-OSRAM USA INC.	DURIS® S 5	6.2	150	200	120	80	1212 (3030 Metric)	0.70	17	Active

Engineering Selection Recommendations

For Direct Replacement (Highest Compatibility): STW9C2SB and STW8C2SB-NZ are recommended as primary substitutes. Both are active products from Seoul Semiconductor Inc. with identical electrical specifications (6.1V, 100mA test, 200mA max) and package dimensions. STW9C2SB maintains CRI of 90, matching the original part's color rendering performance. STW8C2SB-NZ offers the same electrical performance with CRI of 80, suitable for applications where color rendering index is not a critical specification.

For Extended Availability: STW8C2SB and STW8C2SB-NZ(DISTY) provide additional sourcing options with identical electrical and mechanical specifications to STW8C2SB-NZ, differing only in packaging designation or distribution channel.

For Alternative Manufacturer Sourcing: GW PSLR31.EM-LR-XX33-1-150-R18 and GW PSLR31.EM-LR-XX35-1-150-R18 (ams-OSRAM DURIS® S 5 series) are mechanically compatible alternatives. These parts operate at 6.2V forward voltage and 150mA test current, requiring circuit verification to confirm voltage and current headroom. Both parts are ROHS3 compliant and REACH unaffected. The lower seated height (0.70mm vs. 0.80mm) and higher thermal resistance (17°C/W vs. 10°C/W) must be evaluated for specific thermal and mechanical constraints.

Frequently Asked Questions (FAQ)

Q: Can STW8C2SB-NZ be used as a direct replacement for STW9C2SB-NZ? A: Yes. Both parts share identical forward voltage (6.1V), test current (100mA), maximum current (200mA), package (1212/3030 Metric), and viewing angle (120°). The difference is CRI: STW9C2SB-NZ has CRI 90, while STW8C2SB-NZ has CRI 80. If color rendering index is not specified in your application, STW8C2SB-NZ is a direct electrical and mechanical substitute.

Q: What is the difference between STW8C2SB and STW8C2SB-NZ? A: Both parts are electrically and mechanically identical. The "-NZ" suffix typically indicates a specific packaging or regional designation. Verify with your supplier for any packaging or lead form differences.

Q: Can ams-OSRAM DURIS® S 5 parts replace Seoul Semiconductor 3030 parts? A: Mechanical compatibility is confirmed (1212/3030 package, 120° viewing angle, 200mA maximum current). However, forward voltage is 0.1V higher (6.2V vs. 6.1V) at a higher test current (150mA vs. 100mA). Circuit verification is required to confirm adequate voltage headroom and current capability before substitution.

Q: What does "Product Status: Obsolete" mean for STW9C2SB-NZ? A: Obsolete status indicates the part is no longer manufactured or supported by Seoul Semiconductor Inc. Active substitutes (STW9C2SB, STW8C2SB-NZ, STW8C2SB) should be used for new designs or ongoing production to ensure long-term supply availability.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance certification, maintaining regulatory compatibility with the original STW9C2SB-NZ.

Q: What is the significance of thermal resistance differences between Seoul Semiconductor and ams-OSRAM parts? A: Seoul Semiconductor 3030 parts have 10°C/W thermal resistance, while ams-OSRAM DURIS® S 5 parts have 17°C/W. Lower thermal resistance indicates better heat dissipation. For high-current or thermally constrained applications, Seoul Semiconductor parts offer superior thermal performance.

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