Equivalent & Substitute Parts for R4RC Red LED Indication Component

Part Overview

The R4RC is a red LED indication component manufactured by Bivar Inc., designed for through-hole mounting applications. This discrete 2.1V radial LED features a rectangular lens with flat top configuration and clear transparency, delivering 0.5mcd at 20mA test current. The component is classified as obsolete, necessitating identification of functionally equivalent substitute parts for ongoing design and procurement requirements. The R4RC operates at a peak wavelength of 700nm with a 100° viewing angle and maintains unlimited moisture sensitivity rating (MSL 1).

Substiute Parts

R4RC

Bivar Inc.In Stock: 1036R4RC Datasheet

Current PartRFQ

R4RD

Bivar Inc.In Stock: 840R4RD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the R4RC is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Manufacturer: Bivar Inc.
• Color: Red
• Voltage - Forward (Vf) Typical: 2.1V
• Current - Test: 20mA
• Mounting Type: Through Hole
• Package / Case: Radial
• Lens Size: 4.00mm x 2.00mm
• Height (Max): 7.00mm
• Wavelength - Peak: 700nm
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variation Parameters:

• Lens Transparency: Clear or Diffused
• Millicandela Rating: Within operational tolerance
• Viewing Angle: Within operational tolerance
• Lens Color: Red or Colorless (dependent on transparency)
• Product Status: Active or Obsolete

The R4RD qualifies as a direct substitute based on identical electrical characteristics, mechanical dimensions, and mounting specifications, with permissible variations in lens transparency and luminous intensity.

Parameter Comparison

Engineering Selection Recommendations

The R4RD represents a direct functional substitute for the obsolete R4RC component. Both parts share identical electrical specifications (2.1V forward voltage, 20mA test current) and mechanical dimensions (4.00mm x 2.00mm lens, 7.00mm maximum height), ensuring direct circuit compatibility without design modification.

The R4RD offers the following advantages:

Product Status: The R4RD maintains active product status with current manufacturing availability (733 pcs in stock), eliminating supply chain risk associated with the obsolete R4RC (950 pcs remaining inventory).

Compliance Enhancement: The R4RD carries ROHS3 compliance certification, meeting current regulatory requirements for electronic component procurement in restricted substance applications.

Optical Characteristics: The R4RD features diffused lens transparency with red lens color, compared to the R4RC's clear lens with colorless appearance. This variation results in a 0.1mcd reduction in luminous intensity (0.4mcd versus 0.5mcd) and an expanded viewing angle (120° versus 100°). These optical differences are allowable variations within the substitute parameter framework and do not compromise functional performance in indication applications.

Packaging: The R4RD is supplied in bulk packaging, consistent with the radial through-hole mounting configuration of the R4RC.

Selection of the R4RD is appropriate for new designs and redesign of existing applications currently utilizing the R4RC.

Frequently Asked Questions (FAQ)

Q: Can the R4RD be used as a direct replacement for the R4RC in existing circuit designs?

A: Yes. The R4RD is electrically and mechanically compatible with the R4RC. Both components operate at 2.1V forward voltage with 20mA test current and share identical physical dimensions and radial through-hole mounting configuration. No circuit modification is required.

Q: What is the difference between the clear lens of the R4RC and the diffused lens of the R4RD?

A: The R4RC features a clear lens with colorless appearance, while the R4RD features a diffused lens with red coloration. The diffused lens of the R4RD scatters light over a wider viewing angle (120° versus 100°) and reduces peak luminous intensity (0.4mcd versus 0.5mcd). Selection between these optical characteristics depends on application-specific visibility and brightness requirements.

Q: Why is the R4RC classified as obsolete?

A: The R4RC is no longer in active production. The R4RD serves as the current active equivalent, offering identical electrical and mechanical specifications with enhanced regulatory compliance (ROHS3).

Q: Does the R4RD meet current environmental compliance standards?

A: Yes. The R4RD carries ROHS3 compliance certification, meeting current restrictions on hazardous substances in electronic components.

Q: Are there any packaging differences between the R4RC and R4RD?

A: Both components use radial through-hole packaging. The R4RD is supplied in bulk packaging format.

Q: What is the viewing angle difference, and does it affect circuit performance?

A: The R4RD provides a 120° viewing angle compared to the R4RC's 100° viewing angle. The expanded viewing angle of the R4RD allows visibility from a wider range of observation positions. This difference is an allowable variation and does not negatively impact circuit functionality.

Q: Is the luminous intensity reduction from 0.5mcd to 0.4mcd significant?

A: The 0.1mcd reduction represents a 20% decrease in peak luminous intensity. This variation is within allowable substitute parameters. Application-specific brightness requirements should be evaluated to determine if this reduction is acceptable for the intended indication function.