OVM4Y LED Yellow Clear TO-46 T/H Equivalent & Substitute Parts

Part Overview

The OVM4Y is a yellow 589nm LED indication component manufactured by TT Electronics / Optek Technology in a TO-46-2 lens top metal can package for through-hole mounting. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The OVM4Y delivers 2010mcd at 1.8V forward voltage with an 18° viewing angle and 4.63mm diameter clear domed lens.

Substiute Parts

OVM4Y

TT Electronics / Optek TechnologyIn Stock: 1076OVM4Y Datasheet

Current PartRFQ

151033YS03000

Würth ElektronikIn Stock: 2344151033YS03000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OVM4Y is determined by the following critical parameters:

• Wavelength - Dominant: 589nm (yellow spectrum)
• Color: Yellow
• Lens Transparency: Clear
• Mounting Type: Through Hole
• Current - Test: 20mA
• Millicandela Rating: Within acceptable operational range
• Voltage - Forward (Vf): Tolerance for circuit design accommodation

The substitute part 151033YS03000 maintains the same dominant wavelength (589nm), yellow color, clear lens transparency, through-hole mounting, and 20mA test current. Variations in forward voltage (2V vs 1.8V), lens size (3.00mm vs 4.63mm), and package form factor (Radial vs TO-46-2) are acceptable within the substitution criteria for yellow LED indication applications where the spectral output and electrical test parameters align.

Parameter Comparison

Engineering Selection Recommendations

The 151033YS03000 from Würth Elektronik is an active product with ROHS3 compliance, addressing the obsolescence and regulatory status limitations of the OVM4Y. Both components operate at identical test current (20mA) and maintain the same dominant wavelength (589nm) for yellow indication applications.

Circuit design accommodation is required for the forward voltage difference: the 151033YS03000 operates at 2V versus the OVM4Y's 1.8V. This 0.2V increase must be evaluated within the context of the application's power supply and current-limiting resistor design.

Physical form factor differences exist: the 151033YS03000 uses a 3mm radial package with 5.55mm maximum height compared to the OVM4Y's TO-46-2 metal can with 4.63mm maximum height. PCB layout and mechanical clearance must be verified for the substitute part.

The 151033YS03000 provides a wider 30° viewing angle compared to the OVM4Y's 18° viewing angle, with marginally higher luminous intensity (2100mcd vs 2010mcd), both favorable characteristics for indication applications.

Frequently Asked Questions (FAQ)

Q: Can the 151033YS03000 directly replace the OVM4Y without circuit modification?

A: The substitute part requires circuit evaluation due to the 0.2V forward voltage difference. Current-limiting resistor values must be recalculated to maintain proper LED operating current at 20mA. Direct physical substitution on existing PCBs is not possible due to package form factor differences (TO-46-2 metal can vs 3mm radial).

Q: What are the key compatibility criteria for yellow LED substitution?

A: Dominant wavelength (589nm), color (yellow), lens transparency (clear), mounting type (through-hole), and test current (20mA) are the primary substitution criteria. These parameters ensure functional equivalence in yellow indication circuits.

Q: Does the wider 30° viewing angle of the 151033YS03000 affect compatibility?

A: A wider viewing angle is generally favorable for indication applications as it increases visibility across a broader range of observer positions. This represents an improvement over the OVM4Y's 18° angle and does not create compatibility issues.

Q: What compliance advantages does the 151033YS03000 offer?

A: The 151033YS03000 is ROHS3 compliant and carries active product status, addressing regulatory requirements and supply chain continuity concerns associated with the obsolete, RoHS non-compliant OVM4Y.

Q: Are there mechanical considerations for PCB layout changes?

A: Yes. The 151033YS03000's radial package and 5.55mm maximum height differ from the OVM4Y's TO-46-2 metal can and 4.63mm height. PCB footprint redesign and mechanical clearance verification are required.