TLHO42M1N2 Orange LED T-1 Through Hole - Equivalent & Substitute Parts

Part Overview

The TLHO42M1N2 is an orange 605nm LED indicator manufactured by Vishay Semiconductor Opto Division, designed for through-hole mounting in T-1 (3mm) form factor applications. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance requirements. The part delivers 32mcd at 2.2V forward voltage with a 44° viewing angle and clear lens configuration.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLHO42M1N2
Manufacturer	Vishay Semiconductor Opto Division
Product Status	Obsolete
Color	Orange
Wavelength - Dominant	605nm
Voltage - Forward (Vf) Typical	2.2V
Current - Test	10mA
Millicandela Rating	32mcd
Lens Style	Round with Domed Top
Lens Size	3mm, T-1
Lens Transparency	Clear
Viewing Angle	44°
Mounting Type	Through Hole
Height (Max)	6.10mm
Package / Case	Radial
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TLHO42M1N2 is determined by the following critical parameters:

Primary Substitution Criteria:

Color: Orange (605nm dominant wavelength)
Lens Transparency: Clear
Mounting Type: Through Hole
Lens Style: Round with Domed Top
Lens Size: 3mm, T-1 form factor
Package / Case: Radial configuration

Secondary Compatibility Parameters:

Voltage - Forward (Vf): Range 2.0V to 2.4V acceptable for most applications
Current - Test: 10mA to 20mA operational range
Millicandela Rating: 16mcd to 32mcd maintains brightness compatibility
Viewing Angle: 44° to 85° acceptable for indicator applications
Height (Max): 4.60mm to 6.35mm within mechanical envelope constraints

Compliance Requirements:

RoHS3 Compliant
Moisture Sensitivity Level 1 (Unlimited)

Substitute parts must maintain orange color specification and T-1 through-hole form factor. Parts with different colors (yellow) or significantly different electrical characteristics fall outside direct substitution scope but are listed for reference where application flexibility exists.

Parameter Comparison

Part Number	Manufacturer	Color	Wavelength (nm)	Vf (V)	mcd	Viewing Angle	Height (mm)	Status
TLHO42M1N2	Vishay	Orange	605	2.2	32	44°	6.10	Obsolete
TLHO4201	Vishay	Orange	605	2.4	18	44°	6.10	Active
HLMP-Y402-G0000	Broadcom	Orange	605	2.1	29	45°	5.20	Active
SLR-332DC3F	Rohm	Orange	605	2.0	16	85°	4.60	Active
SLR-332DCT32	Rohm	Orange	605	2.0	16	75°	4.60	Active
HLMP-1420	Broadcom	Yellow	585	2.0	15	45°	6.35	Active
HLMP-1421	Broadcom	Yellow	585	2.0	15	45°	6.35	Active
HLMP-1421-F0002	Broadcom	Yellow	585	2.0	15	45°	6.35	Active
LTL1CHJSTNN	Lite-On	Yellow	587	2.05	180	45°	5.20	Active
SLR-332YC3F	Rohm	Yellow	587	2.1	10	85°	4.60	Active
SLR-332YCT32	Rohm	Yellow	587	2.1	10	85°	4.60	Active

Engineering Selection Recommendations

Direct Orange LED Substitutes (Recommended Priority):

TLHO4201 (Vishay) - Manufacturer-recommended substitute from same product family. Active status ensures ongoing availability. Forward voltage increase from 2.2V to 2.4V is within acceptable tolerance for most indicator circuits. Brightness reduction from 32mcd to 18mcd may require circuit verification in brightness-critical applications. Identical mechanical envelope (6.10mm height) and viewing angle (44°) ensure drop-in compatibility.

HLMP-Y402-G0000 (Broadcom) - Active status with high inventory availability (55,742 pcs). Brightness (29mcd) closely matches original specification. Forward voltage (2.1V) and viewing angle (45°) are compatible. Reduced height (5.20mm) requires mechanical clearance verification. Test current specification differs (20mA vs. 10mA original), necessitating circuit review.

SLR-332DC3F or SLR-332DCT32 (Rohm) - Active status with established supply. Forward voltage (2.0V) is lower than original, reducing circuit power dissipation. Brightness reduction (16mcd) requires application assessment. Significantly wider viewing angle (75° to 85°) alters optical characteristics. Reduced height (4.60mm) provides mechanical flexibility.

Yellow LED Alternatives (Application-Dependent):

Yellow LED substitutes (HLMP-1420, HLMP-1421, LTL1CHJSTNN, SLR-332YC3F, SLR-332YCT32) are suitable only where color change from orange to yellow is acceptable. All maintain T-1 through-hole form factor and radial package configuration. Forward voltage and brightness characteristics vary significantly; circuit redesign may be required.

Compliance Verification:

All listed substitute parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), matching the original specification. No additional environmental or regulatory considerations apply to substitution decisions.

Frequently Asked Questions (FAQ)

Q: Can TLHO4201 directly replace TLHO42M1N2 without circuit modification?

A: TLHO4201 is the manufacturer-recommended substitute and shares identical mechanical and optical characteristics (same height, viewing angle, and lens configuration). The forward voltage increase from 2.2V to 2.4V is within typical circuit tolerance for indicator applications. However, brightness reduction from 32mcd to 18mcd should be verified against application requirements. Circuit testing is recommended for brightness-critical designs.

Q: What is the primary difference between orange and yellow LED substitutes?

A: Orange LEDs (605nm dominant wavelength) and yellow LEDs (585-587nm dominant wavelength) produce visually distinct colors. Orange substitutes maintain the original color specification. Yellow alternatives are suitable only where application requirements permit color change. All listed parts maintain identical T-1 through-hole form factor and radial package configuration.

Q: Are there mechanical compatibility concerns when substituting with SLR-332 series parts?

A: SLR-332 series parts (SLR-332DC3F, SLR-332DCT32, SLR-332YC3F, SLR-332YCT32) have reduced maximum height (4.60mm vs. 6.10mm original). This reduction provides additional mechanical clearance in most applications. However, PCB layout and component spacing should be verified to confirm no interference with adjacent components or enclosure constraints.

Q: How do viewing angle differences affect substitution suitability?

A: The original TLHO42M1N2 specifies 44° viewing angle. Substitute parts range from 44° to 85° viewing angle. Narrower viewing angles (44-45°) maintain directional indication characteristics. Wider viewing angles (75-85°) increase light visibility from off-axis positions, altering the optical performance profile. Application requirements determine acceptable viewing angle range.

Q: What forward voltage range is acceptable for substitution?

A: The original part specifies 2.2V typical forward voltage. Substitute parts range from 2.0V to 2.4V. This 0.4V variation is within typical circuit tolerance for indicator applications using current-limiting resistors. However, circuits with tight voltage regulation or low supply margins should be evaluated individually. Test current specifications (10mA vs. 20mA) also affect circuit design and should be verified.

Q: Are packaging format differences (Bulk, Bag, Tape & Reel) relevant to electrical substitution?

A: Packaging format (Bulk, Bag, Tape & Reel, Tape & Box) affects procurement and assembly processes but does not impact electrical or optical performance. All packaging variants of the same part number (e.g., HLMP-1421 in Bulk vs. HLMP-1421-F0002 in Tape & Reel) are electrically and mechanically identical. Packaging selection depends on manufacturing volume and assembly equipment compatibility.

Q: Which substitute offers the closest brightness match to the original TLHO42M1N2?

A: HLMP-Y402-G0000 (29mcd) provides the closest brightness match to the original specification (32mcd), with only 3mcd difference. This part maintains active status, high inventory availability, and compatible forward voltage (2.1V). Reduced height (5.20mm) and higher test current (20mA) require mechanical and circuit verification.

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