L53GT Green LED T-1 3/4 Through Hole Equivalent & Substitute Parts

Part Overview

The Kingbright L53GT is an active-status green LED indicator designed for through-hole mounting applications. This 5mm T-1 3/4 package component operates at 2V forward voltage with 60mcd luminous intensity and a 568nm dominant wavelength. The L53GT is ROHS3 compliant and maintains unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are necessary when the L53GT becomes unavailable, when alternative brightness levels are required within compatible electrical parameters, or when design flexibility permits selection from multiple qualified manufacturers offering compatible T-1 3/4 green LED packages.

Key Parameters

Parameter	Value	Specification Basis
Lens Size / Package	5mm T-1 3/4	Physical form factor and mounting compatibility
Color	Green	Wavelength range 565-572nm
Lens Transparency	Clear	Optical transmission characteristic
Mounting Type	Through Hole Radial	PCB assembly method
Voltage - Forward (Vf)	2.0V to 2.2V	Operating voltage range
Current - Test	10mA to 20mA	Rated test current
Millicandela Rating	10.6mcd to 170mcd	Luminous intensity range
Viewing Angle	24° to 40°	Beam angle specification
RoHS Status	ROHS3 Compliant	Environmental compliance requirement

Substitute Part Grouping Explanation

Substitution logic for the L53GT is based on strict compatibility within the following allowed parameters:

Primary Compatibility Criteria:

Package form factor: 5mm T-1 3/4 through-hole radial configuration
Color: Green lens with clear transparency
Mounting type: Through-hole PCB assembly
Wavelength range: 565nm to 572nm peak wavelength
Forward voltage: 2.0V to 2.2V nominal
Compliance: ROHS3 compliant, MSL 1 rating

Secondary Selection Variables:

Millicandela rating: 10.6mcd to 170mcd (brightness variation permitted based on circuit design requirements)
Viewing angle: 24° to 40° (beam angle selection based on application needs)
Test current: 10mA or 20mA (circuit current capability determines selection)
Height: 6.00mm to 9.73mm (physical clearance constraints)
Product status: Active or Not For New Designs (availability and lifecycle considerations)

All substitute parts listed maintain electrical compatibility within the specified voltage and current ranges while preserving the through-hole radial package form factor and green optical characteristics.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vf (Typ)	Current - Test	mcd Rating	Viewing Angle	Wavelength - Peak	Height (Max)	Product Status	Packaging
L53GT	Kingbright	2.0V	10mA	60mcd	30°	565nm	9.60mm	Active	Bulk
HLMP-3519	Broadcom Limited	2.1V	10mA	70mcd	24°	565nm	9.19mm	Active	Bulk
HLMP-3568	Broadcom Limited	2.1V	10mA	10.6mcd	40°	565nm	6.35mm	Active	Bulk
HLMP-C523-J0002	Broadcom Limited	2.2V	20mA	170mcd	25°	569nm	8.91mm	Active	Cut Tape (CT)
MV5452	onsemi	2.2V	20mA	25mcd	35°	562nm	8.89mm	Obsolete	Bulk
SLR-56MC3F	Rohm Semiconductor	2.1V	10mA	40mcd	40°	565nm	8.90mm	Not For New Designs	Bulk
SSL-LX5063LGT	Lumex Opto/Components Inc.	2.2V	20mA	40mcd	30°	565nm	6.00mm	Active	Bulk
SSL-LX5093GT	Lumex Opto/Components Inc.	2.2V	20mA	50mcd	30°	565nm	8.60mm	Active	Bulk
SSL-LX5093GT-11	Lumex Opto/Components Inc.	2.2V	20mA	50mcd	30°	565nm	9.73mm	Active	Bulk
SSL-LX5093LGT	Lumex Opto/Components Inc.	2.2V	20mA	80mcd	30°	565nm	8.60mm	Active	Bulk

Engineering Selection Recommendations

Active Status Parts (Recommended for New Designs):

HLMP-3519, HLMP-3568, HLMP-C523-J0002, SSL-LX5063LGT, SSL-LX5093GT, SSL-LX5093GT-11, and SSL-LX5093LGT all maintain active product status with ROHS3 compliance and unlimited MSL rating. These parts are suitable for new design implementations and long-term production continuity.

Brightness-Matched Selection:

For applications requiring luminous intensity closest to the L53GT (60mcd), select HLMP-3519 (70mcd) or SSL-LX5093GT (50mcd). Both operate at 10mA or 20mA test current respectively and maintain 565nm peak wavelength compatibility.

Voltage Consideration:

The L53GT operates at 2.0V nominal forward voltage. Substitute parts operate at 2.1V to 2.2V. Circuit designs must accommodate this 0.1V to 0.2V increase in forward voltage drop. Verify series resistor calculations and power supply headroom before substitution.

Current Rating Impact:

L53GT is rated at 10mA test current. Substitute parts rated at 20mA test current (HLMP-C523-J0002, SSL-LX5063LGT, SSL-LX5093GT, SSL-LX5093GT-11, SSL-LX5093LGT) require circuit verification to ensure current-limiting resistors are appropriately sized for the higher test current specification.

Obsolete and Lifecycle Status:

MV5452 (onsemi) carries obsolete product status and SLR-56MC3F (Rohm Semiconductor) is marked "Not For New Designs." These parts are not recommended for new product development but may be used for legacy system maintenance where existing inventory is available.

Packaging Format:

HLMP-C523-J0002 is supplied in Cut Tape (CT) format; all other substitutes are supplied in Bulk packaging. Verify tape-and-reel compatibility with assembly equipment if CT format is selected.

Frequently Asked Questions (FAQ)

Q: Can the L53GT be directly replaced with HLMP-C523-J0002?

A: Direct replacement is electrically feasible within the T-1 3/4 through-hole package form factor. However, HLMP-C523-J0002 operates at 2.2V forward voltage (versus L53GT 2.0V) and 20mA test current (versus L53GT 10mA). Circuit resistor values must be recalculated to accommodate the higher voltage drop and current rating. Verify power supply headroom before substitution.

Q: What is the difference between SSL-LX5093GT and SSL-LX5093GT-11?

A: Both parts are manufactured by Lumex Opto/Components Inc. and share identical electrical specifications (2.2V, 20mA, 50mcd, 30° viewing angle, 565nm peak wavelength). The primary difference is physical height: SSL-LX5093GT measures 8.60mm maximum height, while SSL-LX5093GT-11 measures 9.73mm maximum height. Selection depends on available PCB clearance and mechanical constraints.

Q: Why is MV5452 listed if it is obsolete?

A: MV5452 is included in the substitute list because it maintains electrical compatibility within the specified voltage (2.2V), current (20mA), and package (T-1 3/4 through-hole) parameters. Obsolete status indicates the part is no longer in active production. MV5452 is suitable only for maintenance of existing systems where legacy inventory exists. New designs must select from active-status alternatives.

Q: Can I use HLMP-3568 as a direct replacement for L53GT?

A: HLMP-3568 is electrically compatible within the T-1 3/4 through-hole package specification. However, HLMP-3568 provides only 10.6mcd luminous intensity compared to L53GT 60mcd. This represents an 82% reduction in brightness. HLMP-3568 is suitable only for applications where reduced brightness is acceptable or where the narrower 6.35mm height provides mechanical advantage. Verify optical performance requirements before substitution.

Q: What viewing angle should I select?

A: The L53GT specifies 30° viewing angle. Substitute parts range from 24° (HLMP-3519, HLMP-C523-J0002) to 40° (HLMP-3568, SLR-56MC3F). Narrower viewing angles (24°-25°) concentrate light intensity in a tighter beam; wider angles (40°) distribute light over a broader area. Select based on application requirements for indicator visibility and beam pattern.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed maintain ROHS3 compliance and MSL 1 (unlimited moisture sensitivity) rating, matching the L53GT environmental specifications. This ensures compatibility with modern PCB assembly processes and environmental regulations.

Q: What is the impact of forward voltage differences on circuit design?

A: The L53GT operates at 2.0V nominal forward voltage. Substitute parts operate at 2.1V to 2.2V. This 0.1V to 0.2V increase reduces voltage available across the series current-limiting resistor. For a fixed power supply voltage, higher forward voltage results in lower current through the resistor. Recalculate resistor values using Ohm's law: R = (Vsupply - Vf) / Iled to maintain desired LED current.

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