LTL-4214 Equivalent & Substitute Parts

Part Overview

The LTL-4214 is a red LED indicator in T-1 3/4 through-hole package manufactured by Lite-On Inc. This component is actively produced and widely used in indication applications requiring discrete red light emission at 657nm dominant wavelength. Substitute parts become necessary when addressing inventory constraints, lead time requirements, or specific application parameter needs while maintaining functional compatibility within the T-1 3/4 form factor and through-hole mounting standard.

Substiute Parts

LTL-4214

Lite-On Inc.In Stock: 803LTL-4214 Datasheet

Current PartRFQ

HLMP-D155

Broadcom LimitedIn Stock: 9365HLMP-D155 Datasheet

MFR RecommendedRFQ

SLR-56VC3F

Rohm SemiconductorIn Stock: 3145SLR-56VC3F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LTL-4214 are qualified based on the following criteria:

Mandatory Compatibility Parameters:

• Color: Red
• Lens Size: 5mm, T-1 3/4
• Mounting Type: Through Hole
• Package / Case: Radial
• Supplier Device Package: T-1 3/4

Allowable Parameter Variance:

• Voltage - Forward (Vf): Range 1.7V to 2.1V (typical values)
• Current - Test: 1mA to 10mA
• Wavelength - Dominant: 630nm to 657nm (red spectrum)
• Millicandela Rating: 10mcd to 25mcd
• Viewing Angle: 16° to 40°
• Height (Max): 8.60mm to 12.44mm

Both identified substitutes (HLMP-D155 and SLR-56VC3F) maintain the core form factor, mounting method, and red color specification while operating within acceptable electrical parameter ranges for red LED indication applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active product status and ROHS3 compliance, qualifying them for equivalent use in standard red LED indication circuits. Selection between LTL-4214, HLMP-D155, and SLR-56VC3F depends on specific application requirements:

LTL-4214 serves as the primary reference with 19mcd brightness and 16° viewing angle, suitable for standard indication applications with moderate brightness requirements.

HLMP-D155 (Broadcom Limited) operates at lower forward voltage (1.7V) and lower test current (1mA), making it suitable for low-power indication circuits. The 12.44mm maximum height requires clearance verification in compact PCB layouts. Wavelength at 640nm remains within the red spectrum.

SLR-56VC3F (Rohm Semiconductor, SLR-56 series) provides the highest brightness at 25mcd with the widest viewing angle at 40°, suitable for applications requiring enhanced visibility. Forward voltage of 2V and test current of 10mA align closely with the LTL-4214 electrical profile.

Frequently Asked Questions (FAQ)

Q: Can HLMP-D155 directly replace LTL-4214 in existing designs?

A: HLMP-D155 maintains identical lens size (5mm, T-1 3/4), mounting type (through hole), and color (red). However, the 12.44mm maximum height exceeds the LTL-4214 at 8.60mm. PCB layout clearance must be verified. The lower forward voltage (1.7V vs 2.1V) and test current (1mA vs 10mA) require circuit current-limiting resistor adjustment.

Q: What are the wavelength differences between substitutes?

A: LTL-4214 operates at 657nm dominant wavelength. HLMP-D155 is specified at 640nm, and SLR-56VC3F at 630nm. All three fall within the red spectrum (620nm-700nm range) and produce visually similar red indication. Specific wavelength selection depends on optical filter compatibility or color-matching requirements in the application.

Q: Which substitute offers the best brightness?

A: SLR-56VC3F provides 25mcd brightness, exceeding both LTL-4214 (19mcd) and HLMP-D155 (10mcd). SLR-56VC3F also offers the widest viewing angle at 40° compared to LTL-4214 at 16°, making it suitable for applications requiring enhanced visibility across wider angles.

Q: Are all substitutes RoHS compliant?

A: Yes. LTL-4214, HLMP-D155, and SLR-56VC3F are all ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and use.

Q: What is the impact of different forward voltages on circuit design?

A: Forward voltage differences (1.7V for HLMP-D155, 2V for SLR-56VC3F, 2.1V for LTL-4214) directly affect current-limiting resistor calculations. Circuits designed for the LTL-4214 at 2.1V require resistor adjustment when substituting HLMP-D155 at 1.7V to maintain consistent LED current and brightness.