L53IT Red LED T-1 3/4 Through Hole - Equivalent & Substitute Parts

Part Overview

The L53IT is an active production red LED indicator manufactured by Kingbright, designed for through-hole mounting applications. This 5mm T-1 3/4 package LED operates at 2V forward voltage with 80mcd brightness output and a 625nm dominant wavelength. The component is RoHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1).

Substitute parts are necessary when the primary L53IT becomes unavailable due to supply constraints, inventory depletion, or when design requirements permit operation within alternative electrical and optical parameters while maintaining the same physical form factor and mounting type.

Key Parameters

Parameter	L53IT Value	Specification Basis
Lens Size	5mm, T-1 3/4	Physical form factor
Mounting Type	Through Hole	PCB assembly method
Package / Case	Radial	Lead configuration
Color	Red	Optical output
Lens Transparency	Clear	Optical transmission
Voltage - Forward (Vf) (Typ)	2V	Operating voltage
Current - Test	10mA	Reference test current
Millicandela Rating	80mcd	Luminous intensity
Viewing Angle	30°	Beam width
RoHS Status	ROHS3 Compliant	Environmental compliance
Product Status	Active	Manufacturing availability

Substitute Part Grouping Explanation

Substitution eligibility for the L53IT is determined by strict adherence to the following criteria:

Physical Compatibility Requirements:

Lens size must be 5mm, T-1 3/4
Mounting type must be through hole
Package configuration must be radial

Electrical Compatibility Requirements:

Forward voltage (Vf) must be within the operating range of the circuit design
Current rating must be compatible with the driving circuit
Wavelength must produce red light output

Optical Compatibility Requirements:

Color must be red
Lens transparency must be clear
Millicandela rating must be sufficient for the application's visibility requirements

Regulatory Compliance Requirements:

RoHS3 compliance mandatory
MSL rating must be 1 (unlimited)

Substitute parts are grouped into three categories based on their relationship to the L53IT:

Direct Manufacturer Equivalent: Parts from the same manufacturer with identical form factor and compatible electrical parameters.

Similar Manufacturer Parts: Parts from alternative manufacturers meeting all physical and regulatory requirements with variations in electrical or optical specifications.

Parametric Equivalents: Parts with matching key electrical parameters and optical output characteristics.

Parameter Comparison

Parameter	L53IT (Kingbright)	WP7113IT (Kingbright)	HLMP-3316 (Broadcom)	HLMP-D155 (Broadcom)	SLR-56VC3F (Rohm)	SSL-LX5093HT (Lumex)	SSL-LX5093IT (Lumex)
Lens Size	5mm, T-1 3/4	5mm, T-1 3/4	5mm, T-1 3/4	5mm, T-1 3/4	5mm, T-1 3/4	5mm, T-1 3/4	5mm, T-1 3/4
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial	Radial	Radial	Radial
Color	Red	Red	Red	Red	Red	Red	Red
Lens Transparency	Clear	Clear	Clear	Clear	Clear	Clear	Clear
Voltage - Forward (Vf) (Typ)	2V	2V	1.9V	1.7V	2V	2V	2V
Current - Test	10mA	20mA	10mA	1mA	10mA	20mA	20mA
Millicandela Rating	80mcd	100mcd	60mcd	10mcd	25mcd	25mcd	80mcd
Viewing Angle	30°	20°	35°	24°	40°	30°	30°
Height (Max)	9.60mm	8.60mm	9.19mm	12.44mm	8.90mm	8.60mm	8.60mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Manufacturer Equivalent - WP7113IT (Kingbright)

WP7113IT is manufactured by Kingbright, the same manufacturer as the L53IT. This part maintains identical forward voltage (2V) and physical form factor. The primary differences are increased millicandela rating (100mcd versus 80mcd) and test current (20mA versus 10mA). WP7113IT is suitable for applications where higher brightness output is acceptable or beneficial. All regulatory compliance certifications (RoHS3, MSL 1) are maintained. Current inventory is 29,093 units.

Parametric Equivalent - SSL-LX5093IT (Lumex Opto/Components Inc.)

SSL-LX5093IT provides parametric equivalence to the L53IT with matching millicandela rating (80mcd), forward voltage (2V), and viewing angle (30°). Manufactured by Lumex Opto/Components Inc., this part is RoHS3 compliant with MSL 1 rating. The test current specification is 20mA. This part is suitable for direct functional replacement in applications where the L53IT becomes unavailable. Current inventory is 6,714 units.

Similar Manufacturer Parts - HLMP-3316 (Broadcom Limited)

HLMP-3316 is manufactured by Broadcom Limited and meets all physical compatibility requirements. Forward voltage is 1.9V (0.1V lower than L53IT), which is compatible with most standard LED driving circuits. Millicandela rating is 60mcd, suitable for applications with moderate brightness requirements. Viewing angle is 35°, providing wider beam distribution. RoHS3 and MSL 1 compliance are maintained. Current inventory is 5,300 units.

Similar Manufacturer Parts - SLR-56VC3F (Rohm Semiconductor)

SLR-56VC3F from Rohm Semiconductor's SLR-56 series maintains 2V forward voltage and 10mA test current matching the L53IT. Millicandela rating is 25mcd with 40° viewing angle. Physical form factor and regulatory compliance are identical. This part is suitable for applications where lower brightness output is acceptable. Current inventory is 3,048 units.

Similar Manufacturer Parts - SSL-LX5093HT (Lumex Opto/Components Inc.)

SSL-LX5093HT from Lumex maintains 2V forward voltage and 30° viewing angle. Millicandela rating is 25mcd with 20mA test current. This part is suitable for applications with lower brightness requirements. RoHS3 and MSL 1 compliance are maintained. Current inventory is 1,610 units.

Limited Compatibility - HLMP-D155 (Broadcom Limited)

HLMP-D155 meets physical form factor requirements but operates at 1.7V forward voltage and 1mA test current. Millicandela rating is 10mcd, significantly lower than the L53IT. This part is suitable only for applications with minimal brightness requirements and where the lower operating voltage is compatible with the circuit design. Height specification is 12.44mm, exceeding the L53IT height of 9.60mm. Current inventory is 9,315 units.

Frequently Asked Questions (FAQ)

Q: Can WP7113IT be used as a direct replacement for L53IT?

A: WP7113IT is compatible with L53IT in applications where the circuit design can accommodate 20mA test current and higher brightness output (100mcd versus 80mcd). Both parts share identical 2V forward voltage, 5mm T-1 3/4 form factor, and through-hole radial mounting. Verify that the driving circuit current capacity supports 20mA operation.

Q: What is the difference between SSL-LX5093IT and SSL-LX5093HT?

A: Both parts are manufactured by Lumex and share identical forward voltage (2V), viewing angle (30°), and form factor. The primary difference is millicandela rating: SSL-LX5093IT provides 80mcd (matching L53IT brightness), while SSL-LX5093HT provides 25mcd. Select SSL-LX5093IT for equivalent brightness output or SSL-LX5093HT for lower brightness applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (WP7113IT, HLMP-3316, HLMP-D155, SLR-56VC3F, SSL-LX5093HT, SSL-LX5093IT) are RoHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating, matching the L53IT compliance status.

Q: Can HLMP-D155 be used in place of L53IT?

A: HLMP-D155 is physically compatible but operates at significantly different electrical parameters: 1.7V forward voltage (versus 2V) and 1mA test current (versus 10mA). Millicandela rating is 10mcd, substantially lower than L53IT's 80mcd. This part is suitable only for applications with minimal brightness requirements where the lower operating voltage is compatible with the circuit design. Height is 12.44mm, exceeding L53IT's 9.60mm maximum height.

Q: What viewing angle differences exist among substitute parts?

A: Viewing angles vary across substitute parts: L53IT and SSL-LX5093IT provide 30°; WP7113IT provides 20° (narrower beam); HLMP-3316 provides 35° (wider beam); HLMP-D155 provides 24°; SLR-56VC3F provides 40° (widest beam). Select based on application requirements for beam width and light distribution.

Q: Do all substitute parts fit the same PCB footprint as L53IT?

A: All substitute parts maintain 5mm T-1 3/4 form factor with through-hole radial mounting, ensuring PCB footprint compatibility. However, height specifications vary: L53IT is 9.60mm maximum; WP7113IT, SSL-LX5093HT, and SSL-LX5093IT are 8.60mm; SLR-56VC3F is 8.90mm; HLMP-3316 is 9.19mm; HLMP-D155 is 12.44mm. Verify clearance in applications with height constraints.

Q: Which substitute part has the highest brightness output?

A: WP7113IT provides the highest millicandela rating at 100mcd, compared to L53IT's 80mcd. This part is suitable for applications requiring maximum brightness output while maintaining identical 2V forward voltage and 5mm T-1 3/4 form factor.

Q: Can substitute parts with different forward voltages be used interchangeably?

A: Forward voltage differences require circuit design verification. HLMP-3316 operates at 1.9V (0.1V lower) and HLMP-D155 at 1.7V (0.3V lower) compared to L53IT's 2V. These lower voltages may be compatible with existing driving circuits, but current limiting resistor values and circuit behavior must be evaluated. Parts with matching 2V forward voltage (WP7113IT, SLR-56VC3F, SSL-LX5093HT, SSL-LX5093IT) provide direct electrical compatibility.

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