Equivalent & Substitute Parts for 3BC-R/Y-F

Part Overview

The 3BC-R/Y-F is a bidirectional red and yellow LED indicator manufactured by Bivar Inc., designed for through-hole mounting in T-1 (3mm) form factor applications. This part features diffused white lens optics with 6mcd red and 4mcd yellow brightness ratings at 20mA test current. The 3BC-R/Y-F is classified as obsolete, necessitating identification of active substitute components that maintain functional compatibility within the specified electrical and mechanical parameters.

Substiute Parts

3BC-R/Y-F

Bivar Inc.In Stock: 8353BC-R/Y-F Datasheet

Current PartRFQ

3BC-3-R/Y-F

Bivar Inc.In Stock: 10683BC-3-R/Y-F Datasheet

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5219768F

DialightIn Stock: 28555219768F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3BC-R/Y-F are identified based on strict alignment with the following critical parameters:

Mandatory Compatibility Criteria:

• Lens size: 3mm, T-1 form factor
• Mounting type: Through hole radial configuration
• Color: Red and yellow dual-color capability
• Lens transparency: Diffused optics
• Voltage - Forward: 2V nominal for red and yellow channels
• Current - Test: 20mA operation
• Moisture Sensitivity Level: 1 (Unlimited)
• Package / Case: Radial

Allowable Parameter Variations:

• Millicandela rating: Substitute parts may exceed the 6mcd red and 4mcd yellow specification
• Configuration: Bidirectional or common cathode configurations are acceptable
• Viewing angle: May differ from 45° specification
• Height: Variations within through-hole mounting constraints
• Wavelength - Peak: Minor shifts within red (625nm±5nm) and yellow (590nm±5nm) ranges
• Product status: Active status preferred for long-term availability

Two substitute parts meet these criteria: the 3BC-3-R/Y-F (Bivar Inc., active status, common cathode configuration) and the 5219768F (Dialight, active status, bidirectional configuration).

Parameter Comparison

Engineering Selection Recommendations

3BC-3-R/Y-F (Bivar Inc.): This substitute maintains manufacturer continuity with Bivar Inc. and shares identical electrical specifications (2V forward voltage, 20mA test current) and wavelength characteristics (625nm red, 590nm yellow). The part is active status with ROHS3 compliance certification. The common cathode configuration differs from the bidirectional main part but operates within the same voltage and current parameters. Height increases to 7.00mm, requiring verification of available board space. Millicandela ratings increase to 30mcd red and 20mcd yellow, providing enhanced brightness margin. This substitute is suitable for applications where increased brightness and ROHS3 compliance are acceptable.

5219768F (Dialight): This substitute maintains bidirectional configuration matching the main part and is active status with ROHS3 compliance and REACH unaffected certification. Forward voltage for yellow increases to 2.1V (within acceptable tolerance), and wavelength shifts to 630nm red and 585nm yellow. Millicandela ratings are 5.6mcd red and 5.6mcd yellow, closely matching the main part specification. Viewing angle expands to 80°, providing wider light distribution. Height is 5.70mm, within 0.4mm of the main part. This substitute is suitable for applications requiring bidirectional operation and minimal brightness increase.

Both substitutes maintain through-hole radial mounting, diffused lens optics, 3mm form factor, and MSL 1 rating. Selection depends on configuration requirements (common cathode vs. bidirectional), brightness tolerance, and height constraints.

Frequently Asked Questions (FAQ)

Q: Can the 3BC-3-R/Y-F replace the 3BC-R/Y-F in all applications?

A: The 3BC-3-R/Y-F is electrically compatible (2V forward voltage, 20mA test current, identical wavelengths) but differs in configuration (common cathode vs. bidirectional) and height (7.00mm vs. 5.30mm). Circuit design must accommodate common cathode operation, and PCB layout must verify 7.00mm height clearance. Brightness increase to 30mcd red and 20mcd yellow may require current limiting adjustment.

Q: What is the key difference between the 3BC-3-R/Y-F and 5219768F substitutes?

A: The 3BC-3-R/Y-F uses common cathode configuration with higher brightness (30mcd red, 20mcd yellow) and greater height (7.00mm). The 5219768F maintains bidirectional configuration with lower brightness (5.6mcd red, 5.6mcd yellow), slightly higher yellow forward voltage (2.1V), and minimal height increase (5.70mm). Configuration selection depends on circuit topology requirements.

Q: Are both substitutes RoHS compliant?

A: Yes, both the 3BC-3-R/Y-F and 5219768F are ROHS3 compliant. The 5219768F additionally carries REACH unaffected certification. The main part 3BC-R/Y-F does not specify RoHS status due to obsolete classification.

Q: Can I use the 5219768F if my circuit requires bidirectional LED operation?

A: Yes, the 5219768F maintains bidirectional configuration identical to the main part 3BC-R/Y-F. Forward voltage specifications are compatible (2V red, 2.1V yellow), and 20mA test current matches. Wavelength shift to 630nm red and 585nm yellow is within acceptable tolerance for red and yellow indication applications.

Q: What mounting considerations apply to these substitutes?

A: All three parts (main and substitutes) use through-hole radial mounting in T-1 (3mm) form factor. The 3BC-3-R/Y-F height of 7.00mm requires verification of available vertical clearance on the PCB. The 5219768F height of 5.70mm is closer to the main part specification of 5.30mm. Radial lead spacing and hole diameter compatibility should be confirmed for the specific PCB design.

Q: How do millicandela ratings affect substitution?

A: The 3BC-3-R/Y-F provides higher brightness (30mcd red, 20mcd yellow vs. 6mcd red, 4mcd yellow), which may require reduced test current or series resistance adjustment to maintain original light output levels. The 5219768F provides comparable brightness (5.6mcd red, 5.6mcd yellow), requiring minimal circuit modification. Application requirements for brightness and power consumption determine the appropriate substitute.