SMP2-SOC Orange LED 2-PLCC SMD Equivalent & Substitute Parts

Part Overview

The SMP2-SOC is an orange 605nm LED indication component manufactured by Bivar Inc. in a 2-PLCC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The SMP2-SOC operates at 1.9V forward voltage with 800mcd brightness at 20mA test current, featuring a 120° viewing angle and clear round lens with flat top design.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMP2-SOC
Manufacturer	Bivar Inc.
Color	Orange
Wavelength - Dominant	605nm
Voltage - Forward (Vf) Typical	1.9V
Current - Test	20mA
Millicandela Rating	800mcd
Viewing Angle	120°
Lens Style	Round with Flat Top
Lens Transparency	Clear
Package / Case	2-PLCC
Mounting Type	Surface Mount
Size / Dimension	3.20mm L x 2.80mm W
Height (Max)	2.00mm
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the SMP2-SOC is determined by the following critical parameters:

Primary Substitution Criteria:

Color: Orange (wavelength range 605nm ± tolerance)
Package / Case: 2-PLCC surface mount configuration
Mounting Type: Surface Mount
Lens Transparency: Clear
Viewing Angle: 120°

Secondary Compatibility Parameters:

Voltage - Forward (Vf): 1.9V nominal (acceptable range 1.9V to 2.2V for circuit compatibility)
Current - Test: 20mA standard test condition
Millicandela Rating: 800mcd (brightness level for indication applications)
Physical dimensions: 3.20mm L x 2.80mm W footprint

Substitution Logic: Parts are grouped as parametric equivalents when they maintain identical color, package type, mounting method, and lens characteristics. Parts with variations in forward voltage, brightness, or wavelength are classified as similar alternatives suitable for applications where the specific parameter variance is acceptable within circuit design tolerances.

Parameter Comparison

Part Number	Manufacturer	Color	Wavelength (nm)	Vf (V)	mcd	Package	Height (mm)	Status
SMP2-SOC	Bivar Inc.	Orange	605	1.9	800	2-PLCC	2.00	Obsolete
SMTL2-SOC	Bivar Inc.	Orange	605	1.9	800	2-PLCC	2.10	Active
67-21-YSC-C2U2AABPE-2T8-AM	Everlight Electronics Co Ltd	Orange	590	2.15	620	2-PLCC	2.10	Active
67-21/S2C-FQ2R2B/2T	Everlight Electronics Co Ltd	Orange	606	2.0	135	2-SMD, J-Lead	2.10	Active
AA3528SESK/J4	Kingbright	Orange	605	2.2	800	2-PLCC	2.10	Active

Engineering Selection Recommendations

Parametric Equivalent (Recommended Primary Substitute):

SMTL2-SOC from Bivar Inc. is the recommended primary substitute. This part maintains identical electrical characteristics (605nm wavelength, 1.9V forward voltage, 800mcd brightness) and package configuration (2-PLCC) as the SMP2-SOC. The SMTL2-SOC is in active production status with RoHS3 compliance certification. Height variance of 0.10mm (2.10mm vs 2.00mm) is within standard PCB assembly tolerances. Packaging is available in Tape & Reel format with 822 units in current inventory.

Secondary Orange LED Alternatives:

AA3528SESK/J4 from Kingbright provides equivalent 800mcd brightness and 605nm wavelength in 2-PLCC package with active product status and RoHS3 compliance. Forward voltage is 2.2V, requiring circuit verification for voltage-sensitive applications. This part is widely available with 1003 units in inventory.

67-21-YSC-C2U2AABPE-2T8-AM from Everlight Electronics offers 2-PLCC package compatibility with active status and RoHS3 compliance. However, wavelength shifts to 590nm and forward voltage increases to 2.15V with reduced brightness (620mcd), making this suitable only for applications where these parameter variations are acceptable.

Not Recommended for Direct Substitution:

67-21/S2C-FQ2R2B/2T uses 2-SMD J-Lead package (not 2-PLCC) and provides significantly reduced brightness (135mcd), unsuitable for equivalent replacement.

Yellow LED parts (67-21/Y2C-AP2R2L/2T, 67-21/Y2C-BR2T1B/2T, 67-21/YSC-FU1U2B/2T, 67-21/YSC-FU1V2B/2T, AA3528SYSK/J3, APED3528SYC) differ in color specification and are not substitutes for orange indication applications.

Frequently Asked Questions (FAQ)

Q: Can SMTL2-SOC directly replace SMP2-SOC without PCB modification?

A: Yes. SMTL2-SOC maintains identical 2-PLCC footprint (3.20mm L x 2.80mm W), electrical specifications (1.9V, 605nm, 800mcd), and mounting type. The 0.10mm height increase (2.10mm vs 2.00mm) is within standard PCB assembly clearance tolerances and does not require design changes.

Q: What is the voltage tolerance range for substituting orange LEDs?

A: The SMP2-SOC operates at 1.9V nominal. Substitutes with forward voltage up to 2.2V (such as AA3528SESK/J4) are electrically compatible in most indication circuits. However, circuit designs with tight voltage regulation or current-limiting resistor calculations should be reviewed when forward voltage exceeds 2.0V.

Q: Why are yellow LED parts listed in the substitute list if they cannot replace orange LEDs?

A: Yellow parts are included in the provided substitute list from the original component data. However, they are not functional substitutes for orange indication applications due to color specification differences. Yellow LEDs (590nm wavelength) are visually distinct from orange (605nm) and should not be used for direct replacement in color-coded indication systems.

Q: What is the difference between 2-PLCC and 2-SMD J-Lead packages?

A: 2-PLCC (Plastic Leaded Chip Carrier) and 2-SMD J-Lead are distinct surface mount package types with different footprints and lead configurations. PCB designs are specific to one package type. Parts using 2-SMD J-Lead (such as 67-21/S2C-FQ2R2B/2T) require PCB redesign and cannot be used as direct substitutes for 2-PLCC designs.

Q: Is RoHS3 compliance required for this application?

A: RoHS3 compliance is a regulatory requirement for many markets and applications. SMTL2-SOC and AA3528SESK/J4 both carry RoHS3 certification. If RoHS3 compliance is mandatory for your application, verify certification status before final part selection.

Q: What inventory considerations apply to substitute part selection?

A: Current inventory levels are: SMP2-SOC (932 units, obsolete status), SMTL2-SOC (822 units, active), AA3528SESK/J4 (1003 units, active), and 67-21-YSC-C2U2AABPE-2T8-AM (1113 units, active). For long-term supply chain planning, active-status parts with higher inventory are preferred over obsolete components.

Q: Can brightness differences between 800mcd and 620mcd affect circuit performance?

A: Brightness (millicandela rating) determines LED visibility in specific lighting conditions. The SMP2-SOC and SMTL2-SOC both provide 800mcd. Substitutes with reduced brightness (such as 67-21-YSC-C2U2AABPE-2T8-AM at 620mcd) may appear dimmer in high-ambient-light environments. Application requirements for visibility should be confirmed before selecting lower-brightness alternatives.

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