OVM4R LED Red Clear TO-46 T/H Equivalent & Substitute Parts

Part Overview

The OVM4R is a red LED indication component manufactured by TT Electronics/Optek Technology, designed for through-hole mounting in TO-46-2 lens top metal can packaging. This part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The OVM4R delivers red light indication at 624nm dominant wavelength with 3300mcd brightness rating, suitable for discrete LED indication applications requiring compact form factors and clear lens transparency.

Substiute Parts

OVM4R

TT Electronics/Optek TechnologyIn Stock: 1059OVM4R Datasheet

Current PartRFQ

5219820F

DialightIn Stock: 20005219820F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OVM4R is determined by the following critical parameters:

• Color matching: Red wavelength specification (dominant wavelength 624nm)
• Lens transparency: Clear lens required for unfiltered light transmission
• Mounting configuration: Through-hole mounting type
• Electrical compatibility: Forward voltage and test current ratings
• Brightness class: Millicandela rating within acceptable operational range
• Regulatory compliance: ROHS3 and REACH status alignment
• Viewing angle: Directional characteristics for application fit

The substitute part 5219820F from Dialight meets these core substitution criteria while maintaining functional equivalence for red LED indication applications.

Parameter Comparison

Engineering Selection Recommendations

The 5219820F serves as a direct functional substitute for the obsolete OVM4R. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and legacy system updates.

Key differences in the substitution:

• Forward voltage increases from 1.8V to 2V, requiring circuit verification for voltage-sensitive applications
• Millicandela rating increases from 3300mcd to 3700mcd, providing enhanced brightness
• Dominant wavelength shifts from 624nm to 630nm, remaining within red spectrum for visual indication
• Viewing angle expands from 18° to 30°, offering wider light distribution
• Package form changes from TO-46-2 metal can to 5mm radial configuration, necessitating PCB layout modification

The 5219820F is currently in active production status, ensuring long-term availability and supply chain stability compared to the obsolete OVM4R.

Frequently Asked Questions (FAQ)

Q: Can the 5219820F directly replace the OVM4R without circuit modifications?

A: The 5219820F requires circuit evaluation due to forward voltage difference (2V vs 1.8V). Current-limiting resistor values must be recalculated to maintain proper LED operation at 20mA test current.

Q: What is the impact of the wavelength shift from 624nm to 630nm?

A: Both wavelengths fall within the red spectrum for LED indication. The 630nm wavelength of the 5219820F produces a visually equivalent red indication suitable for standard indication applications.

Q: How does the package change from TO-46-2 to 5mm radial affect implementation?

A: The package change requires PCB redesign. The TO-46-2 metal can uses axial leads in a compact form factor, while the 5mm radial package uses two leads in a standard 5mm diameter configuration. Mechanical clearance and lead spacing must be verified during layout.

Q: Are both parts compliant with current regulatory requirements?

A: Both OVM4R and 5219820F maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and safety regulations.

Q: What is the significance of the viewing angle increase from 18° to 30°?

A: The wider 30° viewing angle of the 5219820F provides broader light distribution compared to the narrower 18° angle of the OVM4R. This affects visibility from different viewing positions and should be evaluated for the specific application context.

Q: Why is the 5219820F recommended despite the OVM4R being obsolete?

A: The 5219820F is in active production status, ensuring reliable procurement and long-term supply availability. It meets all critical substitution parameters for red LED indication while providing enhanced brightness and wider viewing characteristics.