Dialight 5973306207F Green 2-PLCC SMD LED Equivalent & Substitute Parts

Part Overview

The Dialight 5973306207F is a green surface-mount LED indicator in 2-PLCC package configuration, emitting at 570nm dominant wavelength with 24mcd brightness. This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The part operates at 2V forward voltage with 10mA test current and features a clear, colorless lens with 120° viewing angle. Substitute parts must maintain compatibility with 2-PLCC surface-mount assembly processes and preserve the optical and electrical characteristics required for green LED indication circuits.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	5973306207F	—
Manufacturer	Dialight	—
Color	Green	—
Wavelength - Dominant	570	nm
Wavelength - Peak	572	nm
Voltage - Forward (Vf) Typical	2.0	V
Current - Test	10	mA
Millicandela Rating	24	mcd
Lens Size	2.40	mm Dia
Viewing Angle	120	°
Package / Case	2-PLCC	—
Mounting Type	Surface Mount	—
Size / Dimension	3.20 x 2.80	mm L x W
Height (Max)	2.10	mm
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the 5973306207F are classified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

Color: Green
Package / Case: 2-PLCC
Mounting Type: Surface Mount
Wavelength - Dominant: 570nm (±5nm tolerance acceptable)
Lens Size: 2.40mm Dia
Viewing Angle: 120°
Physical Dimensions: 3.20mm L x 2.80mm W (±0.1mm)
Height (Max): 2.10mm (±0.01mm)

Secondary Electrical Parameters:

Voltage - Forward (Vf): 2.0V to 2.2V range
Current - Test: 10mA to 20mA range
Millicandela Rating: 24mcd to 98mcd (brightness variation acceptable based on circuit design)

Compliance Requirements:

RoHS3 Compliant
REACH Unaffected
Moisture Sensitivity Level: 2 or 3 (1 Year or 168 Hours)

Substitutes are grouped into two categories: MFR Recommended (direct upgrade path) and Parametric Equivalents (compatible alternatives with minor parameter variations).

Parameter Comparison

Parameter	5973306207F (Main)	5973301207NF (MFR Rec.)	AA3528SGS	LG T671-L2N1-1-0-10-R18-Z	QBLP670-YG1	SML-LX2832GC-TR	SML-LX2832SGC-TR	VFHG1104LS-TR
Manufacturer	Dialight	Dialight	Kingbright	ams-OSRAM USA INC.	QT Brightek	Lumex Opto/Components	Lumex Opto/Components	Stanley Electric Co
Color	Green	Green	Green	Green	Green	Green	Green	Green
Wavelength - Dominant (nm)	570	570	568	570	570	—	—	561
Wavelength - Peak (nm)	572	572	565	572	—	565	565	561
Voltage - Forward (Vf) Typ (V)	2.0	2.0	2.2	2.0	2.1	2.1	2.1	2.0
Current - Test (mA)	10	10	20	10	20	20	20	20
Millicandela Rating (mcd)	24	98	25	24.75	28	25	28	25
Lens Size (mm Dia)	2.40	3.39	2.40	2.40	2.40	2.40	2.40	2.40
Lens Style	Round with Flat Top	Round with Domed Top	Round with Flat Top	Round with Flat Top	Round with Flat Top	Round with Flat Top	Round with Flat Top	Round with Flat Top
Viewing Angle (°)	120	120	120	120	120	120	120	120
Package / Case	2-PLCC	2-PLCC	2-PLCC	2-PLCC	2-PLCC	2-PLCC	2-PLCC	2-PLCC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Size / Dimension (mm L x W)	3.20 x 2.80	3.20 x 2.69	3.20 x 2.80	3.20 x 2.80	3.20 x 2.80	3.20 x 2.80	3.20 x 2.80	3.20 x 2.80
Height (Max) (mm)	2.10	2.11	2.10	2.10	2.10	2.10	2.10	2.10
Product Status	Obsolete	Active	Active	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	2 (1 Year)	2 (1 Year)	3 (168 Hours)	2 (1 Year)	3 (168 Hours)	3 (168 Hours)	2 (1 Year)	2A (4 Weeks)
Packaging	—	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

MFR Recommended Substitute: Dialight 5973301207NF

The 5973301207NF is the manufacturer-recommended upgrade path from the obsolete 5973306207F. Both parts are from Dialight's LED portfolio and maintain identical electrical specifications (2V forward voltage, 10mA test current, 570nm dominant wavelength). The primary differences are product status (Active vs. Obsolete), packaging format (Tape & Reel vs. bulk), and brightness rating (98mcd vs. 24mcd). The increased brightness provides enhanced visibility margin in indication circuits. Lens geometry differs slightly (domed top vs. flat top) and lens diameter increases to 3.39mm, which may require PCB layout verification for clearance. This part is ROHS3 compliant with MSL 2 rating (1 Year).

Active Parametric Equivalents for Continued Production:

Parts AA3528SGS, QBLP670-YG1, SML-LX2832GC-TR, SML-LX2832SGC-TR, and VFHG1104LS-TR are all active production parts with 2-PLCC packages and compatible mechanical footprints. All maintain 2.40mm lens diameter, 120° viewing angle, and surface-mount assembly compatibility.

AA3528SGS (Kingbright): Forward voltage 2.2V, 20mA test current, 25mcd brightness. Wavelength 568nm (2nm shift from primary). MSL 3 rating requires 168-hour dry storage protocol.
QBLP670-YG1 (QT Brightek): Forward voltage 2.1V, 20mA test current, 28mcd brightness. Wavelength 570nm (exact match). MSL 3 rating applies.
SML-LX2832GC-TR (Lumex): Forward voltage 2.1V, 20mA test current, 25mcd brightness. Peak wavelength 565nm. MSL 3 rating.
SML-LX2832SGC-TR (Lumex): Forward voltage 2.1V, 20mA test current, 28mcd brightness. Peak wavelength 565nm. MSL 2 rating (1 Year).
VFHG1104LS-TR (Stanley Electric): Forward voltage 2.0V, 20mA test current, 25mcd brightness. Wavelength 561nm (9nm shift toward yellow-green). MSL 2A rating (4 Weeks) requires shortest storage window.

All substitute parts are ROHS3 compliant and REACH unaffected. Selection should prioritize active production status and MSL rating compatibility with manufacturing environment conditions.

Frequently Asked Questions (FAQ)

Q: Can I use the Dialight 5973301207NF as a direct drop-in replacement for the 5973306207F?

A: Electrical compatibility is confirmed (2V forward voltage, 10mA test current, 570nm wavelength). However, the 5973301207NF has a larger lens diameter (3.39mm vs. 2.40mm) and domed lens profile versus flat top. PCB layout clearance must be verified before assembly. Brightness increase (98mcd vs. 24mcd) may require circuit resistor adjustment to maintain consistent indicator intensity.

Q: What is the significance of the MSL (Moisture Sensitivity Level) rating?

A: MSL rating specifies maximum storage time at uncontrolled humidity before the component must be baked to remove absorbed moisture. MSL 2 parts allow 1 year storage; MSL 3 parts allow 168 hours (7 days); MSL 2A parts allow 4 weeks. Parts with higher MSL numbers require more frequent baking cycles and shorter shelf life management. Select based on your manufacturing environment's humidity control capabilities.

Q: Why do some substitute parts have different test currents (10mA vs. 20mA)?

A: Test current is the standard measurement condition used by manufacturers to characterize LED brightness (mcd rating). A 10mA test current indicates the LED is characterized at lower power consumption, while 20mA indicates higher power characterization. Both can operate across a range of currents in actual circuits. Forward voltage and brightness ratings are specific to their respective test currents. Circuit design must account for the actual operating current selected.

Q: Are all substitute parts compatible with the same PCB footprint?

A: All parts use 2-PLCC package with identical 3.20mm L x 2.80mm W footprint dimensions and 2.10mm maximum height, except the 5973301207NF which has 2.69mm width (0.11mm narrower) and 2.11mm height (0.01mm taller). These minor variations are within typical PCB tolerance but should be confirmed with your assembly partner. Lens diameter varies: most substitutes use 2.40mm (matching the original), while the 5973301207NF uses 3.39mm (larger).

Q: Which substitute part is best for high-brightness applications?

A: The Dialight 5973301207NF provides the highest brightness at 98mcd, making it suitable for applications requiring maximum visibility. If 98mcd exceeds circuit requirements, the QBLP670-YG1 and SML-LX2832SGC-TR both offer 28mcd brightness as a middle option, while AA3528SGS, SML-LX2832GC-TR, and VFHG1104LS-TR provide 25mcd (closest to the original 24mcd).

Q: What wavelength differences should I consider?

A: The original part and most substitutes center on 570nm (green). The VFHG1104LS-TR operates at 561nm, which appears slightly more yellow-green. The AA3528SGS operates at 568nm. These 2–9nm variations are typically imperceptible to human vision in indicator applications but may affect color matching in multi-color LED arrays. Confirm wavelength compatibility with your application's color specification.

Q: Are all substitute parts currently in stock?

A: Product status varies. The 5973301207NF, AA3528SGS, QBLP670-YG1, SML-LX2832GC-TR, SML-LX2832SGC-TR, and VFHG1104LS-TR are all classified as Active production parts. The LG T671-L2N1-1-0-10-R18-Z is Obsolete. Inventory availability should be confirmed with your supplier before design finalization.

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