3SGD-S LED Green Diffused T-1 Through-Hole

Part Overview

The 3SGD-S is a green diffused LED indicator in T-1 form factor manufactured by Bivar Inc. This component is an active product designed for through-hole mounting applications requiring green light indication. The need for substitute parts arises from inventory management, supply chain continuity, and application-specific parameter requirements such as forward voltage, luminous intensity, and wavelength characteristics.

Substiute Parts

3SGD-S

Bivar Inc.In Stock: 11463SGD-S Datasheet

Current PartRFQ

SLI-343M8G3F

Rohm SemiconductorIn Stock: 2287SLI-343M8G3F Datasheet

SimilarRFQ

SLI-343P8G3F

Rohm SemiconductorIn Stock: 15941SLI-343P8G3F Datasheet

SimilarRFQ

WP710A10SGD

KingbrightIn Stock: 4066WP710A10SGD Datasheet

SimilarRFQ

WP710A10SGD5V

KingbrightIn Stock: 1462WP710A10SGD5V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3SGD-S are qualified based on the following critical parameters:

Compatibility Parameters:

• Green color and diffused lens transparency
• Through-hole radial mounting configuration
• T-1 form factor (3mm lens diameter or equivalent)
• Viewing angle of 40°
• Forward voltage range: 2.1V to 2.2V (primary group) or 5V (secondary group)
• Test current: 20mA for 2.1V–2.2V parts; 11.5mA for 5V parts
• Wavelength in green spectrum (560nm–572nm)
• RoHS3 compliance

Substitutes are grouped into two functional categories:

Category 1: Standard 2.1V–2.2V Forward Voltage Parts

• SLI-343M8G3F (Rohm Semiconductor, 2.2V, 150mcd)
• SLI-343P8G3F (Rohm Semiconductor, 2.2V, 22mcd)
• WP710A10SGD (Kingbright, 2.2V, 40mcd)

Category 2: 5V Forward Voltage Part

• WP710A10SGD5V (Kingbright, 5V, 25mcd)

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance, meeting regulatory requirements equivalent to the 3SGD-S.

For 2.1V–2.2V Forward Voltage Applications: The SLI-343M8G3F, SLI-343P8G3F, and WP710A10SGD are direct electrical substitutes with 2.2V forward voltage and 20mA test current matching the original design specification. The choice between these parts depends on brightness requirements: SLI-343M8G3F provides 150mcd (5× higher intensity), WP710A10SGD provides 40mcd (1.3× higher intensity), and SLI-343P8G3F provides 22mcd (lower intensity). Mechanical height variations range from 4.50mm (original) to 5.60mm–5.90mm (substitutes); verify PCB layout clearance before selection.

For 5V Supply Voltage Applications: The WP710A10SGD5V operates at 5V forward voltage with reduced test current (11.5mA), making it suitable for designs requiring higher supply voltages. This substitution requires circuit redesign to accommodate the different operating point.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 3SGD-S with any of the listed parts in existing circuit boards?

A: Substitution feasibility depends on circuit design. Parts with 2.1V–2.2V forward voltage (SLI-343M8G3F, SLI-343P8G3F, WP710A10SGD) are electrically compatible with minimal circuit modification. The WP710A10SGD5V requires circuit redesign due to its 5V operating point. Verify series resistor values and voltage supply compatibility for your specific application.

Q: What are the mechanical differences between the 3SGD-S and its substitutes?

A: The 3SGD-S has a maximum height of 4.50mm. Rohm Semiconductor parts (SLI-343M8G3F, SLI-343P8G3F) reach 5.60mm, while Kingbright parts (WP710A10SGD, WP710A10SGD5V) reach 5.90mm. Lens diameter is consistent at 3mm (T-1 form factor) across all parts. PCB through-hole design and mounting surface clearance must accommodate maximum height specifications.

Q: How do the luminous intensity ratings affect substitution?

A: Luminous intensity values (millicandela rating) determine brightness at a fixed viewing angle. The original 3SGD-S provides 30mcd. Available substitutes range from 22mcd to 150mcd. Selection depends on application brightness requirements: lower mcd values suit applications where current limiting is critical; higher mcd values provide greater optical output for the same test current.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, meeting the environmental and material restriction requirements of the original 3SGD-S.

Q: What happens if I select a substitute with a different wavelength?

A: All substitute parts emit green light within the 560nm–572nm wavelength range, providing visually equivalent green indication. The original 3SGD-S specifies 568nm peak wavelength. Rohm Semiconductor SLI-343M8G3F (572nm) and SLI-343P8G3F (560nm) exhibit slight wavelength variations within the green spectrum. These differences are imperceptible in visual indication applications but may affect performance in optical sensing or filtering applications.