SSL-LX305F4LID Red Diffused T-1 LED Equivalent & Substitute Parts

Part Overview

The SSL-LX305F4LID is a red diffused T-1 through-hole LED manufactured by Lumex Opto/Components Inc., designed for discrete LED indication applications. This component operates at 2V forward voltage with a 40mcd brightness rating and features a 3mm round domed lens with 60° viewing angle. The part is ROHS3 compliant and carries Active product status with 1095 units in current inventory.

Substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain disruptions, or when equivalent performance specifications are required across different manufacturers. The following parts maintain functional compatibility through matching electrical characteristics and mechanical form factors.

Key Parameters

Parameter	Value
Manufacturer Part Number	SSL-LX305F4LID
Manufacturer	Lumex Opto/Components Inc.
Color	Red
Lens Transparency	Diffused
Lens Size	3mm, T-1
Voltage - Forward (Vf) (Typ)	2V
Current - Test	20mA
Millicandela Rating	40mcd
Viewing Angle	60°
Wavelength - Peak	635nm
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	5.00mm
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical and mechanical compatibility with the SSL-LX305F4LID:

Parametric Equivalents maintain identical electrical specifications (2V forward voltage, 20mA test current, 40mcd brightness, 60° viewing angle, 635nm peak wavelength) and mechanical form factor (3mm T-1 through-hole radial package). These parts are direct functional replacements with only packaging format variations.

Similar Parts share the same physical form factor (3mm T-1 through-hole radial LED) and red color specification but differ in one or more electrical parameters including forward voltage, test current, brightness rating, viewing angle, or peak wavelength. Selection of similar parts requires circuit design verification to confirm compatibility with existing current-limiting resistor values and brightness requirements.

The following key parameters determine substitution eligibility:

Lens size and type (3mm T-1 round domed)
Mounting configuration (through-hole radial)
Color (red)
Lens transparency (diffused)
Physical height compatibility
RoHS3 compliance status

Parameter Comparison

Part Number	Manufacturer	Vf (Typ)	Current - Test	mcd Rating	Viewing Angle	Peak Wavelength	Height (Max)	Product Status	Packaging
SSL-LX305F4LID	Lumex	2V	20mA	40mcd	60°	635nm	5.00mm	Active	Radial
SSL-LX3054ID	Lumex	2V	20mA	40mcd	60°	635nm	5.25mm	Active	Bulk
SSL-LX3054LID	Lumex	2V	20mA	40mcd	60°	635nm	5.25mm	Active	Bulk
4300F1LC	VCC	1.8V	2mA	1.8mcd	50°	635nm	6.35mm	Not For New Designs	Bulk
HLMP-1600	Broadcom	5V	10mA	2.1mcd	60°	635nm	6.35mm	Active	Bulk
HLMP-1601	Broadcom	12V	13mA	2.1mcd	60°	635nm	6.35mm	Active	Bulk
HLMP-1700	Broadcom	1.7V	2mA	2.1mcd	50°	635nm	6.35mm	Active	Bulk
HLMP-1700-B0002	Broadcom	1.7V	2mA	2.1mcd	50°	635nm	6.35mm	Active	Cut Tape (CT)
HLMP-K101	Broadcom	1.8V	20mA	45mcd	60°	645nm	6.35mm	Active	Bulk
HLMP-K150	Broadcom	1.7V	1mA	2mcd	60°	660nm	6.35mm	Active	Bulk
HLMP-K150-C0002	Broadcom	1.7V	1mA	2mcd	60°	660nm	6.35mm	Active	Cut Tape (CT)

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalents):

SSL-LX3054ID and SSL-LX3054LID are parametric equivalents of SSL-LX305F4LID with identical electrical specifications. Both parts are manufactured by Lumex, carry Active product status, and maintain ROHS3 compliance. The primary difference is packaging format (Bulk versus Radial). These parts are suitable for direct substitution in applications where the 0.25mm height increase (5.25mm versus 5.00mm) does not create mechanical constraints. SSL-LX3054LID offers higher inventory availability (11,007 units) compared to the main part.

Alternative Selection (Similar Parts with Electrical Differences):

HLMP-K101 (Broadcom) provides the closest electrical match among non-equivalent alternatives, with 1.8V forward voltage, 20mA test current, and 45mcd brightness rating. This part maintains 60° viewing angle and Active product status. The 6.35mm height and 645nm peak wavelength represent measurable deviations requiring circuit verification.

Parts with significantly reduced brightness (HLMP-1700 series at 2.1mcd, HLMP-K150 series at 2mcd) or elevated forward voltage (HLMP-1600 at 5V, HLMP-1601 at 12V) require complete circuit redesign and are not recommended as direct substitutes.

The VCC 4300F1LC carries "Not For New Designs" status and exhibits substantial parameter deviations (1.8V, 2mA, 1.8mcd). This part is not recommended for new applications.

All recommended substitute parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited) rating consistent with the main part.

Frequently Asked Questions (FAQ)

Q: Can SSL-LX3054ID and SSL-LX3054LID be used interchangeably with SSL-LX305F4LID?

A: Yes. Both parts are parametric equivalents with identical electrical specifications (2V, 20mA, 40mcd, 60°, 635nm). The 0.25mm height difference (5.25mm versus 5.00mm) must be verified against mechanical clearance requirements in the application. Packaging format differs (Bulk versus Radial) but does not affect electrical performance.

Q: What is the difference between parametric equivalents and similar parts?

A: Parametric equivalents maintain all electrical and optical specifications of the main part. Similar parts share the same physical form factor and color but differ in forward voltage, test current, brightness, viewing angle, or wavelength. Similar parts require circuit design verification before substitution.

Q: Can HLMP-K101 replace SSL-LX305F4LID in existing designs?

A: HLMP-K101 is not a direct replacement. While it maintains 2V-range forward voltage (1.8V), 20mA test current, and comparable brightness (45mcd versus 40mcd), the 6.35mm height and 645nm peak wavelength differ from the main part. Circuit verification is required to confirm compatibility with existing resistor values and optical requirements.

Q: Why are HLMP-1700 and HLMP-K150 listed as similar parts if they have much lower brightness?

A: These parts are included because they share the same 3mm T-1 through-hole form factor and red diffused lens. However, the significantly reduced brightness (2.1mcd and 2mcd respectively) makes them unsuitable for applications requiring 40mcd output. They are listed for reference only and are not recommended as substitutes.

Q: What does "Not For New Designs" status mean for VCC 4300F1LC?

A: This designation indicates the part is obsolete or being phased out by the manufacturer. While the part may be available in inventory, it is not recommended for new product designs. Existing designs using this part should transition to active alternatives.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed in this reference maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited) rating, consistent with the main SSL-LX305F4LID part.

Q: What is the significance of packaging format (Bulk versus Cut Tape)?

A: Packaging format affects handling and assembly processes but does not impact electrical or optical performance. Bulk packaging is suitable for manual assembly or small-volume applications. Cut Tape (CT) packaging is optimized for automated pick-and-place assembly. Selection depends on manufacturing process requirements, not component functionality.

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