LED 2X4MM Bidirectional Indicator R4BC Equivalent & Substitute Parts

Part Overview

The Bivar Inc. R4BC is a 2x4mm rectangular through-hole LED indicator with bidirectional green and red light emission capability. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement. The R4BC provides dual-color indication with diffused lens transparency, suitable for applications requiring space-constrained status indication in radial package configuration.

Substiute Parts

R4BC

Bivar Inc.In Stock: 1097R4BC Datasheet

Current PartRFQ

5219743F

DialightIn Stock: 8485219743F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete R4BC is based on strict alignment of the following critical parameters:

Mechanical Compatibility:

• Lens size within tolerance: 4.00mm x 2.00mm nominal
• Lens style: Rectangle with flat top
• Mounting type: Through hole radial package
• Supplier device package: Rectangular 2mmx4mm

Optical Compatibility:

• Lens transparency: Diffused
• Color configuration: Green and red bidirectional
• Viewing angle: Minimum 125°

Electrical Compatibility:

• Forward voltage (Vf): Green 2.1V to 2.2V, Red 2.0V
• Test current: 20mA for both colors
• Millicandela rating: Minimum 5.5mcd for both colors

Regulatory Compliance:

• ECCN: EAR99
• HTSUS: 8541.41.0000
• Moisture Sensitivity Level: 1 (Unlimited)

The Dialight 5219743F meets all substitution criteria and is classified as active product status, providing long-term availability assurance.

Parameter Comparison

Engineering Selection Recommendations

The Dialight 5219743F is the qualified substitute for the obsolete Bivar Inc. R4BC based on the following engineering criteria:

Product Status and Availability: The R4BC is classified as obsolete, creating supply chain risk. The 5219743F maintains active product status with documented inventory availability, ensuring long-term procurement viability.

Regulatory Compliance: Both components share identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications, confirming equivalent export control and tariff treatment. The 5219743F carries RoHS3 compliance and REACH unaffected status, meeting current environmental regulatory requirements.

Mechanical and Optical Equivalence: The 5219743F maintains dimensional compatibility within manufacturing tolerance (lens size 3.99mm x 2.03mm versus 4.00mm x 2.00mm nominal). Both components feature identical rectangular flat-top diffused lens styling and through-hole radial mounting configuration, ensuring direct PCB footprint compatibility.

Electrical Performance: Forward voltage specifications are compatible across both colors. Green forward voltage differs by 0.1V (2.2V to 2.1V), which is within typical LED tolerance bands. Red forward voltage is identical at 2.0V. Test current remains constant at 20mA for both colors. Millicandela ratings are equivalent or superior in the 5219743F (5.6mcd versus 5.5mcd).

Optical Performance: The 5219743F provides enhanced viewing angle (140° versus 125°), offering improved visibility characteristics without compromising the original design intent.

Frequently Asked Questions (FAQ)

Q: Can the Dialight 5219743F be used as a direct replacement for the R4BC in existing designs?

A: Yes. The 5219743F meets all mechanical, optical, and electrical compatibility criteria. Through-hole radial package configuration, lens dimensions, and electrical characteristics are equivalent. No circuit modifications are required.

Q: What are the key differences between the R4BC and 5219743F?

A: The primary differences are product status (obsolete versus active), viewing angle (125° versus 140°), and regulatory certifications. The 5219743F includes RoHS3 compliance and REACH unaffected status. Lens dimensions vary within manufacturing tolerance (3.99mm x 2.03mm versus 4.00mm x 2.00mm). Green forward voltage is 0.1V lower in the 5219743F.

Q: Are there any circuit design considerations when substituting the R4BC with the 5219743F?

A: No circuit modifications are necessary. Forward voltage and test current specifications are compatible. The 0.1V difference in green forward voltage falls within standard LED tolerance ranges and does not require current-limiting resistor adjustment.

Q: What is the viewing angle difference, and does it affect application suitability?

A: The 5219743F provides 140° viewing angle compared to the R4BC's 125°. This represents a 15° increase in horizontal visibility. For applications requiring specific viewing angle constraints, this enhanced performance is beneficial and does not create compatibility issues.

Q: Are the lens colors compatible?

A: The R4BC does not specify lens color. The 5219743F features a white lens with diffused transparency. Both components provide diffused optical characteristics suitable for status indication applications.

Q: What packaging options are available for the 5219743F?

A: The 5219743F is supplied in bulk packaging. The R4BC was supplied in standard packaging. Packaging format does not affect component electrical or mechanical performance.

Q: Is the 5219743F RoHS compliant?

A: Yes. The 5219743F is RoHS3 compliant and REACH unaffected, meeting current environmental regulatory requirements. The R4BC product status documentation does not specify RoHS compliance.

Q: Can the 5219743F be used in new designs, or is it only for replacement applications?

A: The 5219743F is suitable for both new designs and replacement applications. Active product status ensures long-term availability and supply chain stability for ongoing production.