SSL-LX3054IC Red LED T-1 Through Hole Equivalent & Substitute Parts

Part Overview

The SSL-LX3054IC is an active red LED indication component manufactured by Lumex Opto/Components Inc. in a T-1 through-hole package. This discrete 2V radial LED operates at 20mA test current with a 60mcd brightness rating and 635nm peak wavelength. The component features a clear colorless lens with 30° viewing angle and 5.25mm maximum height. Substitute parts are necessary when the primary part reaches end-of-life status, inventory constraints occur, or alternative electrical characteristics better suit specific application requirements while maintaining functional compatibility.

Key Parameters

Parameter	SSL-LX3054IC
Manufacturer	Lumex Opto/Components Inc.
Color	Red
Lens Transparency	Clear
Lens Size	3mm, T-1
Voltage - Forward (Vf) Typical	2V
Current - Test	20mA
Millicandela Rating	60mcd
Wavelength - Peak	635nm
Viewing Angle	30°
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	5.25mm
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the SSL-LX3054IC are selected based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Color: Red (all substitutes match)
Mounting Type: Through Hole radial configuration (all substitutes match)
Lens Size: 3mm T-1 package form factor (all substitutes match)
Voltage - Forward (Vf): 2V nominal operation (primary matching criterion)
Current - Test: 20mA nominal operation (primary matching criterion)
Lens Transparency: Clear colorless lens (primary matching criterion)

Secondary Variation Parameters:

Millicandela rating (brightness): 60mcd baseline; substitutes range from 3mcd to 880mcd
Wavelength - Peak: 635nm baseline; substitutes range from 632nm to 660nm
Viewing Angle: 30° baseline; substitutes range from 22° to 45°
Height (Max): 5.25mm baseline; substitutes range from 5.20mm to 6.55mm

Substitutes are grouped into two categories:

Category A - Direct Electrical Equivalents (2V, 20mA, Clear Lens): Parts maintaining identical forward voltage, test current, and clear lens transparency. These include HLMP-Y601-J0000, HLMP-Y651-G0000, LTL1CHKRKNN, and LTL42EKEKNN. These parts differ primarily in brightness and viewing angle characteristics.

Category B - Compatible Alternatives (Modified Electrical Parameters): Parts with altered forward voltage or test current specifications. HLMP-K105 and HLMP-K105-J0002 operate at 1.8V with 20mA test current. HLMP-K155 operates at 1.7V with 1mA test current. 151031SS04000 features diffused lens transparency. These require circuit design verification for voltage drop and current limiting adjustments.

Parameter Comparison

Part Number	Manufacturer	Color	Lens Transparency	Vf (Typ)	Current - Test	mcd Rating	Peak Wavelength	Viewing Angle	Height (Max)	RoHS Status
SSL-LX3054IC	Lumex Opto/Components Inc.	Red	Clear	2V	20mA	60mcd	635nm	30°	5.25mm	ROHS3 Compliant
151031SS04000	Würth Elektronik	Red	Diffused	2V	20mA	160mcd	640nm	40°	5.55mm	ROHS3 Compliant
HLMP-K105	Broadcom Limited	Red	Clear	1.8V	20mA	65mcd	645nm	45°	6.35mm	ROHS3 Compliant
HLMP-K105-J0002	Broadcom Limited	Red	Clear	1.8V	20mA	65mcd	645nm	45°	6.35mm	ROHS3 Compliant
HLMP-K155	Broadcom Limited	Red	Clear	1.7V	1mA	3mcd	660nm	45°	6.35mm	ROHS3 Compliant
HLMP-Y601-J0000	Broadcom Limited	Red	Clear	2V	20mA	680mcd	633nm	45°	5.20mm	ROHS3 Compliant
HLMP-Y651-G0000	Broadcom Limited	Red	Clear	2V	20mA	300mcd	652nm	45°	5.20mm	ROHS3 Compliant
LTL1CHKEKNN	Lite-On Inc.	Red	Clear	2.05V	20mA	680mcd	632nm	45°	5.20mm	ROHS3 Compliant
LTL1CHKRKNN	Lite-On Inc.	Red	Clear	2V	20mA	400mcd	639nm	45°	5.20mm	ROHS3 Compliant
LTL42EKEKNN	Lite-On Inc.	Red	Clear	2.05V	20mA	880mcd	632nm	22°	6.55mm	ROHS3 Compliant
SLR-343VC3F	Rohm Semiconductor	Red	Clear	2V	10mA	25mcd	630nm	40°	5.60mm	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitutes (No Circuit Modification Required):

HLMP-Y601-J0000 and HLMP-Y651-G0000 from Broadcom Limited, along with LTL1CHKRKNN from Lite-On Inc., operate at identical 2V forward voltage and 20mA test current with clear lens transparency. These parts maintain full electrical compatibility with the SSL-LX3054IC. HLMP-Y601-J0000 provides significantly higher brightness (680mcd versus 60mcd) with comparable wavelength characteristics. HLMP-Y651-G0000 offers moderate brightness increase (300mcd) with wider viewing angle (45° versus 30°). LTL1CHKRKNN delivers 400mcd brightness with 45° viewing angle. All three are ROHS3 compliant and active products.

Compatible Alternatives (Circuit Design Verification Required):

HLMP-K105 and HLMP-K105-J0002 (Broadcom Limited) operate at reduced forward voltage (1.8V) with identical 20mA test current. These parts require verification that circuit current-limiting resistors accommodate the 0.2V voltage reduction. The HLMP-K105-J0002 variant offers superior inventory availability (20,739 pcs) in Cut Tape packaging compared to bulk HLMP-K105 (2,300 pcs).

LTL1CHKEKNN (Lite-On Inc.) operates at 2.05V with 20mA test current, requiring minimal circuit adjustment. This part delivers 680mcd brightness with 45° viewing angle and maintains active product status.

LTL42EKEKNN (Lite-On Inc.) provides the highest brightness option (880mcd) at 2.05V and 20mA test current but features a narrower 22° viewing angle and increased height (6.55mm). This part is suitable for applications requiring concentrated light output.

Limited Compatibility Options:

HLMP-K155 (Broadcom Limited) operates at significantly reduced voltage (1.7V) and current (1mA test), making it unsuitable for direct substitution in circuits designed for 2V/20mA operation. This part is appropriate only for low-power indicator applications with redesigned current-limiting networks.

151031SS04000 (Würth Elektronik) features diffused lens transparency instead of clear, altering light distribution characteristics. This part maintains 2V/20mA electrical compatibility but requires visual performance verification for applications sensitive to lens clarity.

SLR-343VC3F (Rohm Semiconductor) operates at reduced test current (10mA versus 20mA), requiring circuit redesign for proper brightness performance.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance and active product status. Broadcom Limited parts demonstrate highest inventory availability, with HLMP-K155 offering 100,300 pcs stock. Lite-On Inc. parts provide strong availability (15,968 to 65,304 pcs) with REACH compliance variations noted. Würth Elektronik 151031SS04000 maintains 1,188 pcs inventory.

Frequently Asked Questions (FAQ)

Q: Can HLMP-K105 directly replace SSL-LX3054IC without circuit modification?

A: HLMP-K105 operates at 1.8V forward voltage compared to SSL-LX3054IC's 2V specification. While the 20mA test current matches, the 0.2V reduction affects voltage drop across current-limiting resistors. Direct substitution is possible in circuits with adequate design margin, but verification of LED brightness and circuit current flow is required. The HLMP-K105-J0002 variant in Cut Tape packaging offers identical electrical specifications with superior inventory availability.

Q: What is the difference between clear and diffused lens options?

A: The SSL-LX3054IC features a clear colorless lens that transmits light with minimal scattering. The 151031SS04000 substitute features a diffused red lens that scatters light more broadly, increasing viewing angle from 30° to 40° but reducing peak brightness intensity in the direct viewing direction. Lens selection depends on application requirements for light distribution pattern and visibility from multiple angles.

Q: Why do some substitutes have significantly higher brightness ratings?

A: HLMP-Y601-J0000 (680mcd), LTL1CHKEKNN (680mcd), and LTL42EKEKNN (880mcd) deliver higher brightness through improved LED die efficiency and optical design. These parts maintain identical 2V/20mA electrical specifications, allowing direct substitution in circuits where increased visibility is beneficial. Applications requiring the original 60mcd brightness should verify that higher-brightness substitutes do not create excessive light output or power dissipation concerns.

Q: What packaging options are available for substitute parts?

A: Most substitute parts are supplied in Bulk packaging. HLMP-K105-J0002 is available in Cut Tape (CT) format, offering advantages for automated assembly processes and reduced packaging waste. All parts maintain identical T-1 through-hole radial form factor and are compatible with standard PCB mounting.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts maintain ROHS3 compliance. REACH status varies: most parts are REACH Unaffected or REACH Compliant. LTL1CHKRKNN and LTL42EKEKNN show REACH Affected status. Verify REACH compliance requirements for your specific application and supply chain requirements.

Q: Which substitute offers the best inventory availability?

A: HLMP-K155 (Broadcom Limited) provides the highest inventory level at 100,300 pcs. However, this part operates at significantly different electrical specifications (1.7V/1mA) unsuitable for direct substitution. For direct electrical equivalents, HLMP-K105-J0002 offers 20,739 pcs in Cut Tape packaging, while LTL1CHKRKNN provides 65,304 pcs in Bulk packaging.

Q: Can HLMP-K155 be used as a substitute?

A: HLMP-K155 operates at 1.7V forward voltage and 1mA test current, compared to SSL-LX3054IC's 2V/20mA specification. This part delivers only 3mcd brightness versus 60mcd. Substitution requires complete circuit redesign including new current-limiting resistor values and is appropriate only for low-power indicator applications where reduced brightness is acceptable.

Q: What is the height difference between SSL-LX3054IC and substitute parts?

A: SSL-LX3054IC has a maximum height of 5.25mm. Most direct electrical equivalents (HLMP-Y601-J0000, HLMP-Y651-G0000, LTL1CHKEKNN) maintain 5.20mm height. HLMP-K105 and HLMP-K105-J0002 are taller at 6.35mm. LTL42EKEKNN reaches 6.55mm maximum height. Verify PCB clearance and enclosure constraints before selecting taller alternatives.

Q: Which substitute provides the narrowest viewing angle?

A: LTL42EKEKNN features a 22° viewing angle compared to SSL-LX3054IC's 30°. This narrower angle concentrates light output for applications requiring focused illumination. Most other substitutes offer 40° to 45° viewing angles for broader light distribution.

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