LED GREEN DIFFUSED T-1 T/H 3GDL Equivalent & Substitute Parts

Part Overview

The Bivar Inc. 3GDL is a green diffused T-1 through-hole LED indicator with a forward voltage of 2.1V and a test current of 2mA. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The 3GDL operates at 568nm peak wavelength with a 2mcd millicandela rating and 40° viewing angle, designed for discrete LED indication applications in radial through-hole configurations.

Key Parameters

Parameter	Value
Manufacturer	Bivar Inc.
Part Number	3GDL
Product Status	Obsolete
Color	Green
Lens Transparency	Diffused
Lens Size	3mm, T-1
Voltage - Forward (Vf) Typical	2.1V
Current - Test	2mA
Millicandela Rating	2mcd
Wavelength - Peak	568nm
Viewing Angle	40°
Lens Style	Round with Domed Top
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	4.50mm
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 3GDL is determined by the following critical parameters: color (green), lens transparency (diffused), lens size (3mm T-1), mounting type (through-hole radial), and forward voltage range compatibility. The test current and millicandela rating establish the brightness and operational characteristics. Wavelength specifications (peak and dominant) confirm color consistency within the green spectrum (560-575nm range).

Substitute parts are grouped into two categories based on forward voltage compatibility:

Category 1: Low Voltage Operation (1.9V - 2.2V Forward Voltage) These parts operate within the original 3GDL voltage specification and are direct functional replacements for applications requiring low-voltage LED indication.

Category 2: Higher Voltage Operation (5V - 12V Forward Voltage) These parts require different circuit design considerations due to elevated forward voltage ratings and are suitable for applications with higher supply voltages.

Category 3: Alternative Color Specification (Yellow-Green, 573nm) These parts maintain the same form factor and mounting type but operate at a different wavelength within the green spectrum, suitable for applications where yellow-green indication is acceptable.

Parameter Comparison

Parameter	3GDL (Bivar)	151031VS06000 (Würth)	264-7SYGD/S530-E2 (Everlight)	414SYGD/S530-E2 (Everlight)	HLMP-1640 (Broadcom)	HLMP-1641 (Broadcom)	HLMP-1790 (Broadcom)	LTL-4231-002 (Lite-On)
Color	Green	Green	Yellow-Green	Yellow-Green	Green	Green	Green	Green
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused
Lens Size	3mm, T-1	3.00mm Dia	2.90mm Dia	3.00mm Dia	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1
Voltage - Forward (Vf) Typical	2.1V	2.2V	2V	2V	5V	12V	1.9V	2.1V
Current - Test	2mA	20mA	20mA	20mA	10mA	13mA	2mA	20mA
Millicandela Rating	2mcd	30mcd	50mcd	12.5mcd	1.6mcd	1.6mcd	2.3mcd	12.6mcd
Wavelength - Peak	568nm	560nm	575nm	575nm	565nm	565nm	565nm	565nm
Viewing Angle	40°	60°	60°	140°	60°	60°	50°	40°
Lens Style	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Flat Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial
Height (Max)	4.50mm	5.55mm	6.20mm	7.00mm	6.35mm	6.35mm	6.35mm	6.80mm
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not Specified	ROHS3 Compliant	ROHS3 Compliant	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Voltage-Compatible Substitutes (2.0V - 2.2V Range)

The HLMP-1790 and HLMP-1790-A0002 (Broadcom Limited) provide the closest electrical match to the 3GDL with a forward voltage of 1.9V and test current of 2mA. These parts maintain identical lens size (3mm T-1), mounting type (through-hole radial), and diffused green lens transparency. The HLMP-1790 series is ROHS3 compliant and carries active product status. Height specification is 6.35mm compared to the original 4.50mm, requiring PCB layout verification for space-constrained applications.

The LTL-4231-002 (Lite-On Inc.) operates at 2.1V forward voltage, matching the original 3GDL specification exactly. This part is ROHS3 compliant with active product status. The test current is elevated to 20mA with a millicandela rating of 12.6mcd, indicating higher brightness output. Height is 6.80mm. This part is supplied in Tape & Reel packaging.

The 151031VS06000 (Würth Elektronik) operates at 2.2V forward voltage with 20mA test current and 30mcd brightness. This part is ROHS3 compliant and REACH unaffected, with active product status. The WL-TMRC series designation indicates manufacturer support. Height is 5.55mm, the closest to the original 4.50mm specification among active alternatives.

Higher Voltage Substitutes (5V - 12V Range)

The HLMP-1640 (Broadcom Limited) operates at 5V forward voltage with 10mA test current. This part is suitable for applications with 5V supply rails. ROHS3 compliant and REACH unaffected with active product status. The HLMP-1640-B00A1 and HLMP-1640-B00A2 variants provide right-angle mounting configurations for circuit board indicator applications.

The HLMP-1641 (Broadcom Limited) operates at 12V forward voltage with 13mA test current. This part is suitable for higher voltage applications. ROHS3 compliant and REACH unaffected with active product status.

Alternative Color Specification (Yellow-Green, 573nm)

The 264-7SYGD/S530-E2 and 414SYGD/S530-E2 (Everlight Electronics Co Ltd) provide yellow-green indication at 573nm wavelength. Both parts are ROHS3 compliant with active product status. The 264-7SYGD/S530-E2 operates at 2V with 50mcd brightness and 60° viewing angle. The 414SYGD/S530-E2 operates at 2V with 12.5mcd brightness and 140° viewing angle with flat-top lens style. These parts are suitable only for applications where yellow-green indication is functionally acceptable.

Compliance and Availability

All recommended active substitutes carry ROHS3 compliance certification. The Broadcom HLMP series parts carry REACH unaffected status. All parts maintain MSL 1 (Unlimited) moisture sensitivity rating. Inventory availability ranges from 1,037 to 26,157 pieces across substitute options.

Frequently Asked Questions (FAQ)

Q: Can the HLMP-1790 directly replace the 3GDL without circuit modification?

A: The HLMP-1790 operates at 1.9V forward voltage compared to the 3GDL at 2.1V, with identical 2mA test current. Both maintain 3mm T-1 lens size, diffused green transparency, and through-hole radial mounting. The primary difference is height (6.35mm vs. 4.50mm), requiring PCB layout verification. No circuit modification is necessary for voltage compatibility.

Q: What is the brightness difference between the 3GDL and substitute parts?

A: The 3GDL operates at 2mcd. The HLMP-1790 provides 2.3mcd, the closest brightness match. The LTL-4231-002 provides 12.6mcd at elevated test current (20mA). The 151031VS06000 provides 30mcd. Higher brightness substitutes require circuit current limiting adjustment if brightness reduction is desired.

Q: Are the Everlight yellow-green parts (264-7SYGD/S530-E2, 414SYGD/S530-E2) compatible with the 3GDL?

A: These parts maintain identical form factor, mounting type, and forward voltage range (2V). However, they operate at 573nm wavelength (yellow-green) compared to the 3GDL at 568nm (green). Substitution is only appropriate for applications where yellow-green indication is functionally acceptable.

Q: What is the impact of height differences on PCB design?

A: The 3GDL specifies 4.50mm maximum height. Substitute parts range from 5.55mm (151031VS06000) to 7.00mm (414SYGD/S530-E2). Height increase may affect PCB clearance, component spacing, and enclosure fit. Verify mechanical constraints before selection.

Q: Which substitute offers the best compliance profile?

A: All active substitute parts carry ROHS3 compliance. The Broadcom HLMP series (HLMP-1790, HLMP-1640, HLMP-1641) additionally carry REACH unaffected status, providing the most comprehensive regulatory compliance documentation.

Q: Can I use the HLMP-1640 (5V) or HLMP-1641 (12V) in a 2V circuit?

A: No. The HLMP-1640 and HLMP-1641 are designed for 5V and 12V supply rails respectively. Direct substitution in a 2V circuit will result in insufficient forward voltage and non-operation. These parts require circuit redesign with appropriate voltage supply and current limiting resistor adjustment.

Q: What packaging options are available for production?

A: The 3GDL is supplied in bulk packaging. Substitute parts are available in multiple packaging formats: Bulk (151031VS06000, HLMP-1640, HLMP-1641, HLMP-1790), Tape & Reel (414SYGD/S530-E2, LTL-4231-002), and Cut Tape (HLMP-1790-A0002). Packaging selection depends on production volume and assembly equipment compatibility.

Q: Is the viewing angle difference significant between the 3GDL and substitutes?

A: The 3GDL specifies 40° viewing angle. Most substitutes provide 50-60° viewing angles, offering wider visibility. The 414SYGD/S530-E2 provides 140° viewing angle for applications requiring very wide visibility. Narrower viewing angles are not available among active substitutes; verify application requirements before selection.

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