3SBC-R/Y LED Indicator - Equivalent & Substitute Parts

Part Overview

The 3SBC-R/Y is a bidirectional red/yellow LED indicator manufactured by Bivar Inc., designed for through-hole mounting applications. This component is currently obsolete, necessitating the identification of functionally equivalent alternatives for continued product support and new designs. The part provides dual-color LED indication with discrete 1.7V red and 2V yellow forward voltages, suitable for 20mA test current applications.

Substiute Parts

3SBC-R/Y

Bivar Inc.In Stock: 7303SBC-R/Y Datasheet

Current PartRFQ

WP937EYW

KingbrightIn Stock: 2132WP937EYW Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3SBC-R/Y are identified based on the following critical parameters that define functional equivalency:

Mechanical Compatibility Parameters:

• Lens Size: 3mm, T-1 diameter
• Mounting Type: Through Hole, Radial configuration
• Lens Style: Round with Domed Top
• Height: Within acceptable assembly clearance limits (5.60mm to 5.97mm range)

Electrical Performance Parameters:

• Color: Bidirectional red/yellow dual-color configuration
• Lens Transparency: Diffused type
• Forward Voltage (Vf): Red 1.7V to 2V range; Yellow 2V to 2.1V range
• Test Current: 20mA for both colors
• Millicandela Rating: Compatible brightness levels for indication applications
• Viewing Angle: Minimum 45° preferred for general indication

Compliance and Packaging:

• ECCN and HTSUS alignment
• Moisture Sensitivity Level MSL 1 for unlimited storage
• Active product status for availability assurance

The WP937EYW manufactured by Kingbright satisfies all substitution criteria within these allowable parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

The WP937EYW from Kingbright is qualified as the direct substitute for the obsolete 3SBC-R/Y. The substitute part maintains identical mechanical form factor (T-1 3mm through-hole radial configuration) and electrical interface parameters within acceptable engineering tolerances.

Product Status Advantage: The WP937EYW carries Active product status from Kingbright, ensuring sustained manufacturing and supply chain availability. This addresses the critical concern presented by the 3SBC-R/Y obsolescence.

Compliance Certification: Both the original and substitute part share identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications, facilitating regulatory and customs compliance without modification to established supply procedures.

RoHS and Environmental Compliance: The WP937EYW carries ROHS3 Compliant and REACH Unaffected certifications, meeting current environmental regulatory requirements for component sourcing.

The forward voltage differential for the red LED (0.3V) and yellow LED (0.1V) falls within standard design tolerance windows for through-hole LED indication circuits. The slightly lower millicandela ratings (10mcd red, 8mcd yellow versus 15mcd and 20mcd) remain within typical indication application requirements and are offset by the superior 60° viewing angle compared to the original 45° specification.

Frequently Asked Questions (FAQ)

Q: Can the WP937EYW directly replace the 3SBC-R/Y without circuit modifications? The WP937EYW is mechanically and electrically compatible for direct replacement in through-hole PCB applications. The forward voltage increase (0.3V for red, 0.1V for yellow) is within standard LED indication circuit tolerances. Existing current-limiting resistor calculations may require minor adjustment to account for the voltage variance, dependent on supply voltage and circuit design margins.

Q: What is the primary functional difference between these parts? The 3SBC-R/Y and WP937EYW share identical color configuration, lens type, and mounting methodology. The WP937EYW provides a wider 60° viewing angle versus the 3SBC-R/Y 45° angle. The substitute delivers lower brightness output (10mcd red, 8mcd yellow) compared to the original (15mcd red, 20mcd yellow), which is appropriate for standard indication applications.

Q: Why is product status important for component selection? Product status directly impacts supply chain viability. The original 3SBC-R/Y is classified as Obsolete, indicating that Bivar Inc. no longer manufactures this part. The WP937EYW Active status from Kingbright ensures continued production and availability for current and future procurement needs without future discontinuation risk.

Q: Are there packaging considerations for the WP937EYW? The WP937EYW is supplied in Bulk packaging format, consistent with the Radial package / case designation. The through-hole mounting configuration and T-1 form factor remain identical to the original 3SBC-R/Y, eliminating design and assembly modifications.

Q: Is the WP937EYW suitable for new design applications? The WP937EYW is appropriate for new through-hole LED indication designs requiring bidirectional red/yellow dual-color capability. The Active product status, RoHS3 compliance, and REACH Unaffected certification support long-term design support and regulatory adherence for applications with anticipated extended production lifecycles.

Q: What are the key compliance advantages of selecting the WP937EYW? The WP937EYW maintains alignment with critical compliance classifications (ECCN EAR99, HTSUS 8541.41.0000) and adds current regulatory certifications: ROHS3 Compliant and REACH Unaffected. These certifications address evolving environmental regulations without requiring supply chain recertification procedures.