LED AMBER/GREEN DIFFUSED T-1 T/H 3SBC-A/G-F Equivalent & Substitute Parts

Part Overview

The 3SBC-A/G-F is a bidirectional LED indicator manufactured by Bivar Inc., featuring amber and green color options in a T-1 (3mm) through-hole package with diffused lens. This component is classified as obsolete, necessitating identification of active substitute parts for new designs and ongoing production requirements. The part provides dual-color indication capability with amber at 1.8V forward voltage and green at 2.1V forward voltage, suitable for discrete LED indication applications.

Substiute Parts

3SBC-A/G-F

Bivar Inc.In Stock: 8453SBC-A/G-F Datasheet

Current PartRFQ

WP937GYW

KingbrightIn Stock: 18446WP937GYW Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3SBC-A/G-F is determined by the following critical parameters:

Physical Compatibility:

• Lens size: 3mm, T-1 package
• Mounting type: Through hole, radial configuration
• Lens style: Round with domed top
• Lens transparency: Diffused

Electrical Compatibility:

• Forward voltage range: 1.8V to 2.2V
• Test current: 20mA
• Configuration: Bidirectional operation

Optical Compatibility:

• Color availability: Single or dual-color options
• Wavelength range: 565nm to 605nm (visible spectrum)
• Millicandela rating: Minimum 8mcd

The WP937GYW from Kingbright meets these substitution criteria through matching physical package dimensions, through-hole radial mounting, diffused lens configuration, and compatible electrical operating parameters. While the WP937GYW offers green and yellow color options rather than amber and green, the green wavelength (568nm) aligns with the original green specification (568nm), and the yellow option (588nm) provides an alternative indicator color within the visible spectrum.

Parameter Comparison

Engineering Selection Recommendations

The WP937GYW serves as an active substitute for the obsolete 3SBC-A/G-F based on the following factors:

Product Status Alignment: The WP937GYW maintains active product status with Kingbright, ensuring ongoing availability and supply chain continuity compared to the obsolete 3SBC-A/G-F.

Regulatory Compliance: The WP937GYW is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components in most jurisdictions.

Physical Package Compatibility: Both parts utilize identical T-1 (3mm) through-hole radial packages with diffused round domed-top lenses, ensuring direct mechanical compatibility with existing PCB layouts and mounting hardware.

Electrical Operating Parameters: Forward voltage specifications for the WP937GYW green option (2.2V) fall within acceptable tolerance of the original green specification (2.1V). The yellow option (2.1V) matches the original green forward voltage exactly. Test current remains constant at 20mA for both parts.

Optical Characteristics: Green wavelength peak (565nm) and dominant wavelength (568nm) on the WP937GYW align with the original green specification (568nm peak). The yellow option provides an alternative indicator color for applications requiring color differentiation.

Viewing Angle Consideration: The WP937GYW provides a wider viewing angle (60°) compared to the original part (45°), offering improved visibility in applications where viewing angle is a design consideration.

Frequently Asked Questions (FAQ)

Q: Can the WP937GYW directly replace the 3SBC-A/G-F in existing designs?

A: The WP937GYW is mechanically and electrically compatible for direct PCB replacement. Both parts share identical T-1 (3mm) through-hole radial packages, diffused lens configurations, and 20mA test current specifications. The primary design consideration is color availability: the WP937GYW offers green and yellow options, while the original offers amber and green. If amber indication is required, alternative substitutes must be evaluated.

Q: What are the key differences in electrical specifications?

A: The WP937GYW green forward voltage is 2.2V compared to the original 2.1V green specification, representing a 0.1V increase. The WP937GYW yellow forward voltage (2.1V) matches the original green specification. Both parts operate at identical 20mA test current. Circuit designs should verify that the 0.1V increase in green forward voltage does not impact current-limiting resistor calculations or power supply margins.

Q: Are there viewing angle implications for substitution?

A: The WP937GYW provides a 60° viewing angle compared to the original 45° specification. This wider viewing angle improves visibility across a broader range of observation angles, which is generally beneficial for indicator applications. No design modifications are required to accommodate this change.

Q: What is the height difference between these parts?

A: The WP937GYW maximum height is 5.60mm compared to the original 5.30mm specification, representing a 0.30mm increase. This difference is negligible for most through-hole applications and should not impact PCB layout or enclosure clearance in standard designs.

Q: Does the WP937GYW meet current regulatory requirements?

A: Yes. The WP937GYW is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components. The original 3SBC-A/G-F regulatory status was not specified in available documentation.

Q: What millicandela ratings should be considered for substitution?

A: The WP937GYW green rating (14mcd) is lower than the original green rating (15mcd), representing a 1mcd reduction. The WP937GYW yellow rating (8mcd) is significantly lower than the original amber rating (20mcd). Applications requiring specific brightness levels should verify that the WP937GYW brightness specifications meet design requirements before implementation.

Q: Are there wavelength considerations for color-critical applications?

A: The WP937GYW green wavelength peak (565nm) and dominant wavelength (568nm) align with the original green specification (568nm peak). The WP937GYW yellow wavelength (590nm peak, 588nm dominant) differs from the original amber wavelength (605nm peak). Applications requiring specific color matching should verify that the WP937GYW color output meets visual identification requirements.