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

Part Overview

The 3BC-Y/G-F is a bidirectional through-hole LED indicator manufactured by Bivar Inc., featuring dual-color green and yellow light emission in a 3mm T-1 diffused lens package. This component is designed for discrete LED indication applications requiring simultaneous green (2.1V, 2mcd) and yellow (2V, 4mcd) output capability. The part maintains Active product status and is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified to address inventory availability, extended lead times, or specific application requirements while maintaining functional and electrical compatibility.

Substiute Parts

3BC-Y/G-F

Bivar Inc.In Stock: 10743BC-Y/G-F Datasheet

Current PartRFQ

5219478F

DialightIn Stock: 20775219478F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Mandatory Matching Criteria:

• Dual-color green and yellow bidirectional LED configuration
• 3mm diffused lens with round domed top geometry
• Through-hole radial mounting package
• Forward voltage compatibility: Green 2.1V ±tolerance, Yellow 2.0V ±tolerance
• Test current rating: 20mA for both colors
• ROHS3 compliance and MSL 1 rating

Acceptable Variation Parameters:

• Millicandela rating within ±10% of specified values
• Viewing angle variation (45° to 80°) acceptable for general indication applications
• Wavelength specifications within standard color tolerance bands
• Maximum height variation within PCB assembly constraints

The substitute part 5219478F (Dialight Series 521) meets all mandatory criteria with documented compatibility across electrical, mechanical, and compliance dimensions.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: 3BC-Y/G-F (Bivar Inc.)

Use the original 3BC-Y/G-F when:

• Bivar Inc. supply chain is available with acceptable lead times
• Design validation has been completed with this specific manufacturer part
• Inventory stock (976 Pcs) meets project timeline requirements
• No cost or availability constraints exist

Substitute Part: 5219478F (Dialight Series 521)

Use 5219478F as a direct substitute when:

• Original part experiences extended lead times or supply discontinuation
• Dialight inventory (1972 Pcs) provides superior availability
• Application tolerates the documented parameter variations listed in the comparison table
• Both parts maintain identical ROHS3 compliance and EAR99 export classification
• PCB assembly height tolerance accommodates the 5.70mm maximum height (0.40mm increase from original 5.30mm)

Compliance Verification: Both parts are ROHS3 compliant, MSL 1 rated, and classified under identical HTSUS code 8541.41.0000 and ECCN EAR99, confirming regulatory and export compatibility for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can 5219478F replace 3BC-Y/G-F in existing PCB designs without modification?

A: Yes. Both parts are 3mm through-hole radial mount LEDs with identical electrical specifications (2.1V green, 2.0V/2.1V yellow, 20mA test current). The 5219478F height of 5.70mm versus 3BC-Y/G-F height of 5.30mm represents a 0.40mm increase. This variation is within standard PCB assembly tolerances for through-hole components and does not require design modification.

Q: What is the difference in viewing angle between these parts?

A: The 3BC-Y/G-F specifies 45° viewing angle, while 5219478F specifies 80° viewing angle. The 5219478F provides a wider light distribution pattern. For applications requiring narrow-angle indication, the original 3BC-Y/G-F is preferred. For applications benefiting from wider visibility, 5219478F offers superior light distribution without electrical incompatibility.

Q: Are the color wavelengths identical between these parts?

A: Wavelengths differ slightly within standard color tolerance bands. 3BC-Y/G-F green peak is 568nm versus 5219478F at 565nm; yellow peak is 590nm versus 585nm. These variations fall within industry-standard green and yellow LED color specifications and produce visually indistinguishable results in typical indication applications.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both 3BC-Y/G-F and 5219478F are ROHS3 compliant, carry MSL 1 (unlimited moisture sensitivity), and are classified under identical HTSUS code 8541.41.0000 and ECCN EAR99. They are interchangeable from regulatory and export control perspectives.

Q: What is the brightness difference between these LEDs?

A: 5219478F provides slightly higher brightness: 6.3mcd green (+5% versus 6mcd) and 4.3mcd yellow (+7.5% versus 4mcd). This minor increase is imperceptible in typical indication applications and does not affect circuit design or current limiting resistor calculations, as both parts operate at identical 20mA test current.

Q: Which part should be selected for new designs?

A: For new designs, either part is acceptable based on supply chain availability and cost considerations. Both meet identical electrical, mechanical, and compliance requirements. Verify current inventory status and lead times with your component supplier to determine the most practical selection.