LTL-1NHG Equivalent & Substitute Parts

Part Overview

The LTL-1NHG is a green diffused T-1 through-hole LED manufactured by Lite-On Inc., designed for indication applications. This component features a 3mm lens with 12.6mcd brightness at 2.1V forward voltage and 20mA test current. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and environmental compliance can be maintained across alternative manufacturers while meeting the same application requirements.

Key Parameters

Parameter	LTL-1NHG Value
Color	Green
Lens Transparency	Diffused
Lens Size	3mm, T-1
Lens Style	Round with Domed Top
Mounting Type	Through Hole
Voltage - Forward (Vf) (Typ)	2.1V
Current - Test	20mA
Millicandela Rating	12.6mcd
Wavelength - Dominant	569nm
Viewing Angle	40°
Package / Case	Radial
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LTL-1NHG are grouped based on the following critical parameters that determine functional equivalence:

Primary Compatibility Criteria:

Color: Green
Lens Transparency: Diffused
Lens Size: 3mm, T-1
Mounting Type: Through Hole
Package / Case: Radial
Voltage - Forward (Vf): 2.1V ±0.2V tolerance
Current - Test: 20mA nominal operation
Wavelength - Dominant: 565nm–574nm range

Secondary Compatibility Criteria:

Millicandela Rating: 12.6mcd minimum
Viewing Angle: 35°–60° acceptable range
RoHS Status: ROHS3 Compliant
Product Status: Active

Parts meeting all primary criteria and at least one secondary criterion are classified as direct substitutes. Parts with different forward voltages (5V, 12V, 1.9V) or significantly different test currents are listed as alternative options for specific circuit configurations but require design review.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Color	Lens Size	Vf (Typ)	Current - Test	mcd Rating	Wavelength - Dominant	Viewing Angle	Height (Max)	RoHS Status	Product Status
LTL-1NHG	Lite-On Inc.	Green	3mm, T-1	2.1V	20mA	12.6mcd	569nm	40°	5.25mm	ROHS3	Active
151031VS06000	Würth Elektronik	Green	3.00mm Dia	2.2V	20mA	30mcd	568nm	60°	5.55mm	ROHS3	Active
3GD-F	Bivar Inc.	Green	3mm, T-1	2.1V	20mA	25mcd	—	35°	5.30mm	ROHS3	Active
HLMP-1640	Broadcom Limited	Green	3mm, T-1	5V	10mA	1.6mcd	569nm	60°	6.35mm	ROHS3	Active
HLMP-1640-B00A1	Broadcom Limited	Green	3mm, T-1	5V	10mA	1.6mcd	565nm	120°	—	ROHS3	Active
HLMP-1640-B00A2	Broadcom Limited	Green	3mm, T-1	5V	10mA	1.6mcd	565nm	60°	—	ROHS3	Active
HLMP-1641	Broadcom Limited	Green	3mm, T-1	12V	13mA	1.6mcd	569nm	60°	6.35mm	ROHS3	Active
HLMP-1790	Broadcom Limited	Green	3mm, T-1	1.9V	2mA	2.3mcd	569nm	50°	6.35mm	ROHS3	Active
HLMP-1790-A0002	Broadcom Limited	Green	3mm, T-1	1.9V	2mA	2.3mcd	569nm	50°	6.35mm	ROHS3	Active
SLR-332MG3F	Rohm Semiconductor	Green	3.20mm Dia	2.1V	10mA	16mcd	572nm	85°	4.60mm	ROHS3	Active
SSL-LX3044SUGD	Lumex Opto/Components Inc.	Green	3mm, T-1	2.1V	20mA	180mcd	—	40°	4.60mm	ROHS3	Active

Engineering Selection Recommendations

Direct Substitutes (Electrical and Mechanical Compatibility):

The 3GD-F (Bivar Inc.) and 151031VS06000 (Würth Elektronik) are the primary substitutes for the LTL-1NHG. Both maintain the 2.1V–2.2V forward voltage range, 20mA test current, 3mm T-1 through-hole package, and radial configuration. The 3GD-F provides 25mcd brightness with 35° viewing angle, while the 151031VS06000 offers 30mcd brightness with 60° viewing angle. Both are ROHS3 compliant and Active status.

The SSL-LX3044SUGD (Lumex Opto/Components Inc.) matches the LTL-1NHG electrical specifications (2.1V, 20mA, 3mm T-1, 40° viewing angle) but provides significantly higher brightness at 180mcd. This part is suitable for applications requiring increased luminous intensity while maintaining identical forward voltage and test current.

Alternative Options (Voltage-Dependent Designs):

The HLMP-1790 and HLMP-1790-A0002 (Broadcom Limited) operate at 1.9V with 2mA test current, suitable for low-power applications. The HLMP-1640, HLMP-1640-B00A1, and HLMP-1640-B00A2 (Broadcom Limited) operate at 5V with 10mA test current, requiring circuit redesign. The HLMP-1641 (Broadcom Limited) operates at 12V with 13mA test current for high-voltage applications. These alternatives require verification of circuit compatibility and are not direct pin-for-pin replacements.

The SLR-332MG3F (Rohm Semiconductor) operates at 2.1V but with 10mA test current and 3.20mm lens diameter, requiring mechanical and electrical circuit review.

All substitute parts maintain ROHS3 compliance and Active product status, meeting environmental and supply chain requirements equivalent to the LTL-1NHG.

Frequently Asked Questions (FAQ)

Q: Can the 151031VS06000 replace the LTL-1NHG directly?

A: The 151031VS06000 is electrically compatible with forward voltage of 2.2V (within 0.1V of the LTL-1NHG's 2.1V) and identical 20mA test current. Mechanical compatibility is maintained through identical 3mm T-1 through-hole radial package. The higher brightness (30mcd vs. 12.6mcd) and wider viewing angle (60° vs. 40°) may affect visual appearance in the application. Verify that increased brightness does not cause unintended visual effects or power dissipation concerns.

Q: What is the difference between HLMP-1790 and HLMP-1790-A0002?

A: Both parts are electrically and mechanically identical with 1.9V forward voltage, 2mA test current, 2.3mcd brightness, and 3mm T-1 through-hole package. The primary difference is packaging: HLMP-1790 is supplied in Bulk, while HLMP-1790-A0002 is supplied in Cut Tape (CT). Selection depends on assembly process requirements. Both are suitable substitutes only for low-power applications requiring 1.9V operation.

Q: Can the 3GD-F be used in place of the LTL-1NHG?

A: Yes. The 3GD-F matches the LTL-1NHG in forward voltage (2.1V), test current (20mA), lens size (3mm T-1), and package type (radial through-hole). The 3GD-F provides 25mcd brightness compared to 12.6mcd, and 35° viewing angle compared to 40°. This substitution is suitable for applications where slightly reduced viewing angle and increased brightness are acceptable.

Q: Why do HLMP-1640 and HLMP-1641 have lower brightness ratings?

A: The HLMP-1640 operates at 5V with 10mA test current, and HLMP-1641 operates at 12V with 13mA test current. These higher voltage designs result in lower millicandela ratings (1.6mcd) compared to the LTL-1NHG (12.6mcd) due to different LED junction design optimized for higher voltage operation. These parts require complete circuit redesign and are not direct substitutes.

Q: Is the SSL-LX3044SUGD suitable for high-brightness applications?

A: The SSL-LX3044SUGD provides 180mcd brightness at identical 2.1V forward voltage and 20mA test current, making it suitable for applications requiring increased luminous intensity. The 3mm T-1 through-hole package and 40° viewing angle match the LTL-1NHG. Verify that the application circuit can accommodate the higher brightness without causing visual saturation or thermal concerns.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance equivalent to the LTL-1NHG, meeting environmental and regulatory requirements for restricted substance use.

Q: What is the difference between the Würth Elektronik 151031VS06000 and Bivar 3GD-F?

A: Both are direct substitutes with 2.1V–2.2V forward voltage and 20mA test current. The 151031VS06000 provides 30mcd brightness with 60° viewing angle and 5.55mm maximum height. The 3GD-F provides 25mcd brightness with 35° viewing angle and 5.30mm maximum height. Selection depends on brightness and viewing angle requirements for the specific application.

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