LTL-4294 Equivalent & Substitute Parts

Part Overview

The LTL-4294 is an orange-red LED indicator (621nm dominant wavelength) manufactured by Lite-On Inc. in a T-1 3/4 through-hole radial package. This part operates at 2V forward voltage with a 90mcd brightness rating and 16° viewing angle. The product is classified as obsolete, making equivalent substitute parts necessary for ongoing design requirements and production continuity.

Substiute Parts

LTL-4294

Lite-On Inc.In Stock: 836LTL-4294 Datasheet

Current PartRFQ

HLMP-3366

Broadcom LimitedIn Stock: 873HLMP-3366 Datasheet

MFR RecommendedRFQ

HLMP-D155

Broadcom LimitedIn Stock: 9365HLMP-D155 Datasheet

MFR RecommendedRFQ

MV5152

onsemiIn Stock: 1148MV5152 Datasheet

MFR RecommendedRFQ

MV8141A4R0

Everlight Electronics Co LtdIn Stock: 794MV8141A4R0 Datasheet

MFR RecommendedRFQ

SLR-56VC3F

Rohm SemiconductorIn Stock: 3145SLR-56VC3F Datasheet

MFR RecommendedRFQ

SLR-56VCT32

Rohm SemiconductorIn Stock: 1029SLR-56VCT32 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTL-4294 is determined by the following critical parameters:

• Lens size and package type (5mm T-1 3/4 through-hole radial)
• Mounting configuration (through-hole radial)
• Lens style (round with domed top)
• Forward voltage compatibility (2V nominal operation)
• Current rating (20mA test current)
• Color family (orange-red to red spectrum, 621nm–660nm wavelength range)

The substitute parts listed maintain mechanical compatibility (same package, lens size, and mounting type) and operate within acceptable electrical parameters for LED indicator applications. Variations in brightness (millicandela rating), viewing angle, and specific wavelength are acceptable within the orange-red to red spectrum for general indication purposes.

Parameter Comparison

Engineering Selection Recommendations

Active Product Substitutes (Preferred)

For new designs and production continuity, active product status substitutes are recommended:

• MV8141A4R0 (Everlight Electronics Co Ltd): Active status, ROHS3 compliant, 370mcd brightness, 1.7V forward voltage, 20mA test current. Highest brightness option with compatible electrical characteristics.

• SLR-56VC3F and SLR-56VCT32 (Rohm Semiconductor): Active status, ROHS3 compliant, 2V forward voltage matching the original part, 10mA test current, 630nm dominant wavelength. Available in bulk and tape & box packaging options.

• HLMP-3366 and HLMP-D155 (Broadcom Limited): Active status, ROHS3 compliant, lower forward voltage (1.9V and 1.7V respectively), reduced test current requirements. HLMP-D155 offers unlimited moisture sensitivity level.

Obsolete Product Substitutes (Limited Use)

• MV5152 (onsemi): Obsolete status, 100mcd brightness, 2V forward voltage, 20mA test current. Mechanically and electrically compatible but not recommended for new production due to obsolescence.

All substitute parts maintain T-1 3/4 through-hole radial package compatibility, round domed lens style, and operate within the orange-red to red spectrum (621nm–660nm). Forward voltage variations (1.7V–2V) are acceptable for standard LED indicator circuits with appropriate current-limiting resistor adjustment.

Frequently Asked Questions (FAQ)

Q: Can I directly replace LTL-4294 with any of these substitute parts without circuit modification?

A: Mechanical replacement is direct due to identical package type (T-1 3/4 through-hole radial). Electrical compatibility depends on forward voltage: parts rated 2V (MV5152, SLR-56VC3F, SLR-56VCT32) require no resistor adjustment. Parts rated 1.7V–1.9V (HLMP-3366, HLMP-D155, MV8141A4R0) may require resistor recalculation to maintain proper current limiting.

Q: What is the primary difference between the substitute parts?

A: Key differences are forward voltage (1.7V–2V), brightness rating (10mcd–370mcd), viewing angle (16°–50°), and product status (active vs. obsolete). Selection depends on circuit voltage tolerance, required brightness for the application, and desired viewing angle characteristics.

Q: Are all substitute parts RoHS compliant?

A: HLMP-3366, HLMP-D155, MV8141A4R0, SLR-56VC3F, and SLR-56VCT32 are ROHS3 compliant. MV5152 and the original LTL-4294 do not specify RoHS status in the provided data.

Q: What packaging options are available for the substitute parts?

A: HLMP-3366 and HLMP-D155 are supplied in bulk packaging. MV5152 packaging is not specified. MV8141A4R0, SLR-56VC3F are supplied in bulk. SLR-56VCT32 is available in tape & box (TB) packaging for automated assembly.

Q: Which substitute offers the closest electrical match to LTL-4294?

A: SLR-56VC3F and SLR-56VCT32 provide the closest match with 2V forward voltage, 630nm dominant wavelength, and compatible test current specifications. Both are active products with ROHS3 compliance.

Q: Can I use parts with different viewing angles interchangeably?

A: Viewing angle affects light distribution characteristics. The LTL-4294 has a narrow 16° viewing angle. Substitutes with wider angles (40°–50°) distribute light over a broader area. Application requirements determine acceptability; narrow-angle applications may not tolerate wider-angle substitutes.