SSL-LX305D4ID Equivalent & Substitute Parts

Part Overview

The SSL-LX305D4ID is a red diffused LED indicator manufactured by Lumex Opto/Components Inc., designed for through-hole mounting applications. This T-1 form factor LED operates at 2V forward voltage with a 25mcd brightness rating and 60° viewing angle. The component is classified as Active product status and is RoHS3 compliant.

Substitute parts are identified to address inventory availability, alternative packaging formats, or specific application requirements while maintaining functional compatibility within defined electrical and mechanical parameters.

Key Parameters

Parameter	SSL-LX305D4ID Value
Color	Red
Lens Transparency	Diffused
Lens Size	3mm, T-1
Lens Style	Round with Domed Top
Voltage - Forward (Vf) (Typ)	2V
Current - Test	20mA
Millicandela Rating	25mcd
Viewing Angle	60°
Wavelength - Peak	635nm
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	5.20mm
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalent: Parts that maintain the same forward voltage (2V to 2.1V range), test current (20mA), viewing angle (60°), and peak wavelength (635nm) specifications. These parts are direct functional replacements with minimal circuit design changes.

Similar Parts: Components that share the same physical form factor (T-1, 3mm, through-hole radial), lens type (diffused red), and general application category but differ in one or more electrical parameters including forward voltage, test current, brightness rating, or viewing angle. These parts require circuit design verification before substitution.

Key parameters determining substitution eligibility:

Forward voltage (Vf) tolerance
Test current rating
Millicandela brightness output
Viewing angle
Peak wavelength
Physical dimensions and mounting type
Product status (Active vs. Not For New Designs)

Parameter Comparison

Part Number	Manufacturer	Vf (Typ)	Current - Test	mcd Rating	Viewing Angle	Peak Wavelength	Height (Max)	Product Status	Packaging
SSL-LX305D4ID	Lumex Opto/Components Inc.	2V	20mA	25mcd	60°	635nm	5.20mm	Active	-
SSL-LX3052ID	Lumex Opto/Components Inc.	2.1V	20mA	30mcd	60°	635nm	5.25mm	Active	Bulk
4300F1LC	Visual Communications Company - VCC	1.8V	2mA	1.8mcd	50°	635nm	6.35mm	Not For New Designs	Bulk
HLMP-1600	Broadcom Limited	5V	10mA	2.1mcd	60°	635nm	6.35mm	Active	Bulk
HLMP-1601	Broadcom Limited	12V	13mA	2.1mcd	60°	635nm	6.35mm	Active	Bulk
HLMP-1700	Broadcom Limited	1.7V	2mA	2.1mcd	50°	635nm	6.35mm	Active	Bulk
HLMP-1700-B0002	Broadcom Limited	1.7V	2mA	2.1mcd	50°	635nm	6.35mm	Active	Cut Tape (CT)
HLMP-K101	Broadcom Limited	1.8V	20mA	45mcd	60°	645nm	6.35mm	Active	Bulk
HLMP-K150	Broadcom Limited	1.7V	1mA	2mcd	60°	660nm	6.35mm	Active	Bulk
HLMP-K150-C0002	Broadcom Limited	1.7V	1mA	2mcd	60°	660nm	6.35mm	Active	Cut Tape (CT)
LTL-1CHE	Lite-On Inc.	2V	20mA	12.6mcd	60°	635nm	5.20mm	Active	Bulk

Engineering Selection Recommendations

Parametric Equivalent - Recommended for Direct Substitution:

SSL-LX3052ID is the primary parametric equivalent. This Lumex part maintains identical forward voltage range (2.1V vs. 2V), test current (20mA), and viewing angle (60°). The 5mcd brightness increase and 0.05mm height variance are within acceptable tolerance for most indicator applications. Active product status and RoHS3 compliance ensure long-term availability and regulatory alignment.

Similar Parts - Application-Dependent Selection:

HLMP-K101 (Broadcom Limited) operates at 1.8V with 20mA test current and 60° viewing angle, matching the SSL-LX305D4ID electrical profile. The 45mcd brightness rating represents a significant increase suitable for high-visibility applications. Peak wavelength shifts to 645nm, which may affect color perception in specific lighting conditions.

LTL-1CHE (Lite-On Inc.) matches the SSL-LX305D4ID in forward voltage (2V), test current (20mA), viewing angle (60°), and physical height (5.20mm). The 12.6mcd brightness is lower than the original 25mcd specification, suitable for applications requiring reduced luminous intensity.

HLMP-1700 and HLMP-1700-B0002 (Broadcom Limited) operate at reduced voltage (1.7V) and current (2mA) with lower brightness (2.1mcd). These parts are suitable for low-power indicator circuits but require circuit redesign. The Cut Tape packaging variant (HLMP-1700-B0002) provides alternative procurement format.

Parts with Not For New Designs status (4300F1LC) are not recommended for new circuit implementations.

Frequently Asked Questions (FAQ)

Q: Can SSL-LX3052ID replace SSL-LX305D4ID in existing designs without circuit modification?

A: SSL-LX3052ID operates at 2.1V forward voltage compared to 2V for the SSL-LX305D4ID. This 0.1V difference is within typical LED tolerance ranges and does not require circuit redesign. Both parts maintain identical 20mA test current and 60° viewing angle. Verify that the application circuit can accommodate the slightly higher forward voltage drop.

Q: What is the difference between HLMP-1700 and HLMP-1700-B0002?

A: Both parts are electrically identical with 1.7V forward voltage, 2mA test current, and 2.1mcd brightness. The primary difference is packaging format: HLMP-1700 is supplied in Bulk packaging, while HLMP-1700-B0002 is supplied in Cut Tape (CT) format. Selection depends on procurement and assembly process requirements.

Q: Why do some substitute parts have different viewing angles?

A: Viewing angle is determined by lens design and internal LED chip geometry. Parts with 50° viewing angles (HLMP-1700, HLMP-1700-B0002, 4300F1LC) concentrate light output in a narrower cone compared to 60° parts. Applications requiring wide-angle visibility should maintain 60° specification.

Q: Can HLMP-K101 be used as a direct replacement for SSL-LX305D4ID?

A: HLMP-K101 is electrically compatible with 1.8V forward voltage and 20mA test current, both within acceptable range of the SSL-LX305D4ID. However, the 45mcd brightness is significantly higher than the original 25mcd specification. This part is suitable only for applications where increased luminous intensity is acceptable or beneficial. Peak wavelength shifts to 645nm, which may alter perceived color.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts are RoHS3 compliant and REACH unaffected, matching the SSL-LX305D4ID regulatory status. This ensures compatibility with environmental and regulatory requirements across manufacturing regions.

Q: What is the significance of the 635nm peak wavelength specification?

A: Peak wavelength defines the dominant color output of the LED. All listed parts maintain 635nm peak wavelength except HLMP-K101 (645nm) and HLMP-K150 series (660nm). Wavelength shifts may affect color perception under different lighting conditions and should be verified for applications with specific color matching requirements.

Q: Can low-current parts like HLMP-1700 (2mA) replace the 20mA SSL-LX305D4ID?

A: HLMP-1700 operates at significantly reduced current (2mA vs. 20mA) and brightness (2.1mcd vs. 25mcd). Direct substitution requires complete circuit redesign to accommodate the lower operating current. This part is suitable only for applications where reduced power consumption and lower brightness are design objectives.

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