TLRH4400CU Equivalent & Substitute Parts

Part Overview

The TLRH4400CU is a red diffused T-1 through-hole LED manufactured by Vishay Semiconductor Opto Division, rated at 10V forward voltage with 10mcd brightness. This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain compatibility with the original electrical specifications, mechanical form factor, and mounting requirements while considering current product availability and active status.

Key Parameters

Parameter	TLRH4400CU
Manufacturer	Vishay Semiconductor Opto Division
Color	Red
Lens Transparency	Diffused
Lens Style	Round with Domed Top
Lens Size	3mm, T-1
Voltage - Forward (Vf) (Typ)	10V
Millicandela Rating	10mcd
Viewing Angle	60°
Mounting Type	Through Hole
Wavelength - Dominant	619nm
Wavelength - Peak	635nm
Package / Case	Radial
Height (Max)	6.10mm
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution logic for the TLRH4400CU is based on the following critical parameters:

Primary Compatibility Criteria:

Color: Red
Lens Transparency: Diffused
Lens Style: Round with Domed Top
Lens Size: 3mm, T-1
Mounting Type: Through Hole
Package / Case: Radial
Wavelength - Peak: 635nm (acceptable range)

Secondary Compatibility Criteria:

Voltage - Forward (Vf): 10V nominal operation
Millicandela Rating: 10mcd nominal operation
Viewing Angle: 60° nominal operation
Height (Max): Physical clearance compatibility

Substitute parts are grouped by forward voltage rating, as this parameter directly affects circuit design and current-limiting resistor selection. Parts with different voltage ratings require circuit redesign but maintain mechanical and optical compatibility.

Parameter Comparison

Parameter	TLRH4400CU	4302F1-12V	HLMP-1301-G00FG	HLMP-1600	HLMP-1601	HLMP-1700
Manufacturer	Vishay	VCC	Broadcom	Broadcom	Broadcom	Broadcom
Color	Red	Red	Red	Red	Red	Red
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused
Lens Style	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top
Lens Size	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1
Voltage - Forward (Vf) (Typ)	10V	12V	1.9V	5V	12V	1.7V
Millicandela Rating	10mcd	8mcd	8.6mcd	2.1mcd	2.1mcd	2.1mcd
Viewing Angle	60°	60°	60°	60°	60°	50°
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Wavelength - Peak	635nm	635nm	635nm	635nm	635nm	635nm
Package / Case	Radial	Radial	Radial	Radial	Radial	Radial
Height (Max)	6.10mm	6.35mm	6.35mm	6.35mm	6.35mm	6.35mm
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Voltage Match (10V-12V Range): The 4302F1-12V from Visual Communications Company and HLMP-1601 from Broadcom Limited are the closest electrical matches to the TLRH4400CU. Both operate at 12V forward voltage with similar millicandela ratings (8mcd and 2.1mcd respectively) and maintain the same mechanical form factor. Both parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating, making them suitable for new designs and ongoing production.

Alternative Voltage Options: For applications where circuit redesign is acceptable, HLMP-1301-G00FG (1.9V), HLMP-1600 (5V), and HLMP-1700 (1.7V) provide active alternatives from Broadcom Limited. These parts maintain identical mechanical compatibility and optical characteristics but require corresponding changes to current-limiting resistor values in the circuit.

Brightness Consideration: The TLRH4400CU operates at 10mcd. Direct substitutes 4302F1-12V and HLMP-1301-G00FG provide 8mcd and 8.6mcd respectively, representing acceptable brightness levels for indication applications. HLMP-1600 and HLMP-1700 operate at significantly lower brightness (2.1mcd) and are suitable only for applications where reduced brightness is acceptable.

Product Status Priority: All recommended substitutes are active products, ensuring long-term availability and supply chain stability compared to the obsolete TLRH4400CU.

Frequently Asked Questions (FAQ)

Q: Can I directly replace TLRH4400CU with 4302F1-12V without circuit modification? A: The 4302F1-12V is mechanically and optically compatible with the TLRH4400CU. Both operate at approximately 10-12V forward voltage. Circuit modification depends on the specific current-limiting resistor design in your application. If the resistor was calculated for 10V operation, a 12V part may require resistor adjustment to maintain proper current levels.

Q: What is the key difference between HLMP-1600 and HLMP-1601? A: Both parts are from Broadcom's HLMP series with identical mechanical and optical specifications. HLMP-1600 operates at 5V forward voltage, while HLMP-1601 operates at 12V. Selection depends on your circuit voltage supply. HLMP-1601 is the closer match to the TLRH4400CU's 10V rating.

Q: Are all substitute parts RoHS compliant? A: Yes, all listed substitute parts are ROHS3 compliant, matching the compliance status of the TLRH4400CU.

Q: Can I use HLMP-1700 as a substitute if brightness is not critical? A: HLMP-1700 maintains full mechanical and optical compatibility with the TLRH4400CU. However, it operates at 1.7V forward voltage and provides only 2.1mcd brightness compared to the original 10mcd. Use this part only in applications where reduced brightness is acceptable and where your circuit can accommodate the lower voltage requirement.

Q: What is the height difference between TLRH4400CU and substitute parts? A: The TLRH4400CU has a maximum height of 6.10mm. Most substitute parts (4302F1-12V, HLMP series) have a maximum height of 6.35mm, a difference of 0.25mm. This minimal difference is typically acceptable for through-hole PCB applications with standard component clearance.

Q: Which substitute offers the best brightness match to the original part? A: HLMP-1301-G00FG provides 8.6mcd brightness, the closest match to the TLRH4400CU's 10mcd rating. This part also operates at 1.9V forward voltage, requiring circuit redesign for optimal performance.

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