SSL-LXA228GC-TR21 Equivalent & Substitute Parts

Part Overview

The SSL-LXA228GC-TR21 is a green LED indication component manufactured by Lumex Opto/Components Inc., configured as a 2-SMD surface mount device with yoke bend lead configuration. This part operates at 2.1V forward voltage with a 30mcd brightness rating and 565nm peak wavelength. The component is classified as obsolete product status, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement continuity.

Substiute Parts

SSL-LXA228GC-TR21

Lumex Opto/Components Inc.In Stock: 992SSL-LXA228GC-TR21 Datasheet

Current PartRFQ

SSL-LXA228SUGCTR21

Lumex Opto/Components Inc.In Stock: 909SSL-LXA228SUGCTR21 Datasheet

MFR RecommendedRFQ

91-21SYGC/S530-E1/TR10

Everlight Electronics Co LtdIn Stock: 327691-21SYGC/S530-E1/TR10 Datasheet

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91-21SYGC/S530-E2/TR10

Everlight Electronics Co LtdIn Stock: 89891-21SYGC/S530-E2/TR10 Datasheet

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91-21SYGC/S530-E2/TR9

Everlight Electronics Co LtdIn Stock: 126691-21SYGC/S530-E2/TR9 Datasheet

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91-21SYGC/S530-E4/TR10

Everlight Electronics Co LtdIn Stock: 104091-21SYGC/S530-E4/TR10 Datasheet

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AM2520CGCK09

KingbrightIn Stock: 15676AM2520CGCK09 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SSL-LXA228GC-TR21 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Lens transparency: Clear
• Lens size: 1.90mm diameter
• Mounting type: Surface Mount
• Package case: 2-SMD configuration
• Size/Dimension: 2.50mm L x 2.00mm W
• Height (Max): 2.90mm or compatible
• Viewing angle: 25° or greater
• Current - Test: 20mA
• RoHS3 Compliance

Secondary Compatibility Criteria:

• Forward voltage (Vf): 2.0V to 2.2V range
• Wavelength - Peak: 565nm to 575nm range (green to yellow-green spectrum)
• Millicandela rating: Brightness variations acceptable based on application requirements

The substitute parts are grouped into two categories:

Category 1 - Direct Lumex Equivalent (Recommended): SSL-LXA228SUGCTR21 maintains the same base product number (SSL-LXA228) with upgraded specifications and active product status.

Category 2 - Cross-Manufacturer Alternatives: Everlight Electronics and Kingbright alternatives provide functional equivalence within the specified parameter ranges, with variations in lead configuration (Z-Bend, Gull Wing) and brightness ratings.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SSL-LXA228SUGCTR21

The SSL-LXA228SUGCTR21 is the preferred substitute for SSL-LXA228GC-TR21. This part maintains the same base product number (SSL-LXA228) and manufacturer (Lumex Opto/Components Inc.), ensuring design continuity. The part is classified as active product status, providing long-term availability and supply chain stability. It meets all critical mechanical and electrical compatibility requirements: identical lens size (1.90mm), identical package dimensions (2.50mm L x 2.00mm W), identical height (2.90mm), and identical viewing angle (25°). Forward voltage increases from 2.1V to 2.2V, which is within acceptable tolerance for standard LED circuit designs. Brightness increases from 30mcd to 200mcd, providing enhanced visibility. RoHS3 compliance and MSL rating (4, 72 Hours) are maintained. This part is available in active inventory (887 Pcs).

Secondary Recommendations: Everlight Electronics 91-21SYGC Series

The Everlight Electronics parts (91-21SYGC/S530-E1/TR10, 91-21SYGC/S530-E2/TR10, 91-21SYGC/S530-E2/TR9, 91-21SYGC/S530-E4/TR10) are functionally equivalent alternatives when SSL-LXA228SUGCTR21 is unavailable. These parts maintain critical compatibility parameters: lens size (1.90mm), package dimensions (2.50mm L x 2.00mm W), height (2.90mm to 3.03mm), viewing angle (25°), and forward voltage (2V). All parts are active product status with high inventory availability (850 to 3200 Pcs). Color shifts to yellow-green (573nm dominant wavelength) with peak wavelength at 575nm, which remains within the green spectrum range. Brightness ratings vary from 12mcd to 630mcd depending on variant selection. Lead configuration varies (Z-Bend, Yoke Bend, Gull Wing), requiring PCB layout verification. RoHS3 compliance is confirmed for 91-21SYGC/S530-E2/TR10 and 91-21SYGC/S530-E2/TR9.

Tertiary Recommendation: AM2520CGCK09 (Kingbright)

The AM2520CGCK09 provides an alternative when Lumex and Everlight options are constrained. This part maintains green color (570nm dominant wavelength, 574nm peak), identical lens size (1.90mm), identical package dimensions (2.50mm L x 2.00mm W), and identical height (2.90mm). Forward voltage (2.1V) matches the original part exactly. Brightness is significantly higher at 800mcd. Viewing angle is narrower at 20° compared to the original 25°, which may impact application suitability. Mounting type includes bottom entry configuration. RoHS3 compliance and MSL rating (3, 168 Hours) are confirmed. Inventory availability is highest among all alternatives (15,573 Pcs).

Selection Criteria Summary:

• For direct replacement with minimal circuit redesign: SSL-LXA228SUGCTR21
• For brightness-critical applications requiring higher output: AM2520CGCK09 or 91-21SYGC/S530-E4/TR10
• For cost optimization with acceptable color shift: 91-21SYGC/S530-E2/TR9 or 91-21SYGC/S530-E2/TR10
• For narrow viewing angle requirements: AM2520CGCK09 (20°) or maintain original specification
• For PCB layout constraints: Verify lead configuration compatibility (Yoke Bend, Z-Bend, or Gull Wing)

All recommended substitutes maintain ROHS3 compliance and are suitable for standard LED indication applications.

Frequently Asked Questions (FAQ)

Q1: Can SSL-LXA228SUGCTR21 be used as a direct drop-in replacement for SSL-LXA228GC-TR21?

A: Yes. SSL-LXA228SUGCTR21 maintains identical mechanical dimensions (2.50mm L x 2.00mm W x 2.90mm H), identical lens size (1.90mm diameter), identical viewing angle (25°), and identical lead configuration (Yoke Bend). Forward voltage increases from 2.1V to 2.2V, which is within standard LED circuit tolerance. Brightness increases from 30mcd to 200mcd. No PCB layout modifications are required.

Q2: What is the significance of the lead configuration differences (Yoke Bend, Z-Bend, Gull Wing)?

A: Lead configuration determines the physical orientation and insertion method into the PCB. Yoke Bend (original and SSL-LXA228SUGCTR21) uses a specific lead geometry. Z-Bend (Everlight 91-21SYGC/S530-E1/TR10, E2/TR10, and Kingbright AM2520CGCK09) uses a different geometry. Gull Wing (Everlight 91-21SYGC/S530-E4/TR10) uses a third configuration. PCB footprints must match the selected lead configuration. Verify footprint compatibility before substitution.

Q3: Why do some substitutes show yellow-green color instead of pure green?

A: The Everlight 91-21SYGC series components have a dominant wavelength of 573nm (yellow-green) with peak wavelength at 575nm, compared to the original 565nm peak wavelength (green). Both wavelengths fall within the green spectrum range visible to human perception. The color shift is minimal for most indication applications. If color matching is critical for visual consistency, select SSL-LXA228SUGCTR21 (574nm peak) or AM2520CGCK09 (574nm peak) for closer spectral alignment.

Q4: What does MSL (Moisture Sensitivity Level) rating mean for component handling?

A: MSL indicates the maximum time a component can be exposed to ambient conditions (30°C, 85% relative humidity) before soldering. MSL 4 (72 Hours) means the component must be soldered within 72 hours of opening the moisture barrier bag. MSL 3 (168 Hours) allows 168 hours (7 days). Higher MSL numbers indicate greater moisture sensitivity. SSL-LXA228SUGCTR21 has MSL 4, matching the original part. Everlight 91-21SYGC/S530-E2/TR9 and Kingbright AM2520CGCK09 have MSL 3, providing longer handling windows.

Q5: How does brightness (millicandela rating) affect component selection?

A: Millicandela (mcd) rating indicates light output intensity. The original SSL-LXA228GC-TR21 has 30mcd. SSL-LXA228SUGCTR21 provides 200mcd (6.7x brighter). Everlight variants range from 12mcd to 630mcd. Kingbright AM2520CGCK09 provides 800mcd. Higher brightness is beneficial for visibility in bright environments or when viewing angle is narrow. Lower brightness may be preferred to reduce power consumption or prevent excessive brightness in dark environments. Circuit current limiting (20mA test current) remains constant across all parts.

Q6: What is the importance of RoHS3 compliance status?

A: RoHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the component meets European environmental regulations restricting lead, cadmium, mercury, and other hazardous substances. SSL-LXA228GC-TR21, SSL-LXA228SUGCTR21, 91-21SYGC/S530-E2/TR10, 91-21SYGC/S530-E2/TR9, and AM2520CGCK09 are confirmed ROHS3 compliant. Everlight 91-21SYGC/S530-E1/TR10 and 91-21SYGC/S530-E4/TR10 do not specify RoHS status. For applications requiring RoHS compliance certification, select parts with confirmed ROHS3 status.

Q7: Can I substitute a part with a narrower viewing angle (20°) for the original 25° specification?

A: Substitution is possible only if the application tolerates reduced viewing angle. AM2520CGCK09 has a 20° viewing angle compared to the original 25°. This means the LED light output is more concentrated in the forward direction, reducing visibility from side angles. If the application requires visibility across a 25° angle, the 20° part may not be suitable. Verify application requirements before selecting this alternative.

Q8: What is the difference between "Voltage - Forward (Vf) Typical" values, and does 0.1V variation matter?

A: Forward voltage (Vf) is the voltage drop across the LED when conducting at the specified test current (20mA). The original part has 2.1V typical. SSL-LXA228SUGCTR21 has 2.2V typical (0.1V higher). Everlight and Kingbright alternatives have 2.0V to 2.1V. In standard LED indication circuits with current-limiting resistors, 0.1V to 0.2V variations are typically absorbed by the resistor value adjustment. For precision applications or battery-powered designs with tight voltage budgets, verify that the circuit can accommodate the Vf variation. Most indication applications tolerate this range without modification.

Q9: Why is SSL-LXA228GC-TR21 classified as obsolete, and what does this mean for procurement?

A: Obsolete status indicates the manufacturer has discontinued production and will not accept new orders. Existing inventory (975 Pcs) may be available from distributors, but supply is finite and will eventually deplete. Obsolete parts carry higher risk of supply interruption. Substitution to active product status parts (SSL-LXA228SUGCTR21, Everlight, or Kingbright alternatives) ensures long-term design viability and supply chain stability. For new designs or redesigns, active parts are strongly recommended.

Q10: How do I verify that a substitute part is compatible with my specific PCB design?

A: Compatibility verification requires checking: (1) Lead configuration matches PCB footprint (Yoke Bend, Z-Bend, or Gull Wing); (2) Package dimensions (2.50mm L x 2.00mm W) fit the PCB layout; (3) Maximum height (2.90mm or 3.03mm) clears any overlying components or enclosure; (4) Lens size (1.90mm diameter) matches the PCB opening; (5) Forward voltage (2.0V to 2.2V range) is compatible with the current-limiting circuit; (6) Viewing angle (20° to 25°) meets application visibility requirements. Consult the PCB schematic, layout drawings, and mechanical assembly drawings to confirm all parameters before substitution.