3SYD-201-S

Part Overview

The 3SYD-201-S is a yellow LED indication component manufactured by Bivar Inc., specified as a discrete 2V radial through-hole LED with diffused lens transparency and a 3mm T-1 package format. This part carries an obsolete product status, necessitating identification of active substitute components with equivalent electrical and mechanical characteristics to maintain system compatibility and ensure ongoing supply chain continuity.

Substiute Parts

3SYD-201-S

Bivar Inc.In Stock: 8433SYD-201-S Datasheet

Current PartRFQ

3YC-201-S

Bivar Inc.In Stock: 9233YC-201-S Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters established for the 3SYD-201-S category:

Mandatory Matching Parameters:

• Color: Yellow
• Mounting Type: Through Hole
• Lens Size: 3mm, T-1
• Voltage - Forward (Vf) (Typ): 2V
• Current - Test: 20mA
• Wavelength - Peak: 590nm
• Package / Case: Radial
• Height (Max): 6.58mm

Allowable Variance Parameters:

• Lens Transparency: May differ from diffused
• Millicandela Rating: May be higher than 30mcd
• Viewing Angle: May be narrower than 35°

The 3YC-201-S qualifies as a direct substitute because it maintains all mandatory matching parameters while offering enhanced optical characteristics (40mcd versus 30mcd) and different lens transparency (clear versus diffused), which are allowable substitution variations within this product category.

Parameter Comparison

Engineering Selection Recommendations

The 3YC-201-S is the appropriate substitute for the obsolete 3SYD-201-S based on electrical and mechanical compatibility. Both components share identical forward voltage (2V), test current (20mA), lens size (3mm T-1), package type (radial), and physical height (6.58mm).

The 3YC-201-S maintains active product status and carries ROHS3 compliance certification, meeting contemporary regulatory requirements for new designs and manufacturing operations. The increased millicandela rating (40mcd versus 30mcd) and narrower viewing angle (20° versus 35°) represent enhanced optical performance characteristics suitable for applications requiring higher brightness intensity from a more focused emission pattern.

Frequently Asked Questions (FAQ)

Q: Can the 3YC-201-S directly replace the 3SYD-201-S in existing circuit designs? A: The 3YC-201-S is electrically and mechanically compatible with the 3SYD-201-S. Both components operate at 2V forward voltage with 20mA test current, utilize identical through-hole radial mounting, and fit the same 3mm T-1 lens package envelope with matching 6.58mm maximum height.

Q: What is the functional difference between the diffused lens (3SYD-201-S) and clear lens (3YC-201-S)? A: Lens transparency affects light dispersion and intensity distribution. The clear lens of the 3YC-201-S produces concentrated light output with a narrower viewing angle (20°), while the diffused lens of the 3SYD-201-S scatters light over a wider viewing angle (35°). The 3YC-201-S delivers higher brightness intensity (40mcd versus 30mcd) due to the clear lens configuration.

Q: Does the narrower viewing angle of the 3YC-201-S affect compatibility? A: The 3YC-201-S viewing angle of 20° remains a standard specification for T-1 yellow LED indication components. Application compatibility depends on specific viewing angle requirements; the narrower angle of the 3YC-201-S suits applications requiring focused directional indication, while the wider angle of the 3SYD-201-S suits omnidirectional viewing requirements.

Q: What is the status difference between the two parts? A: The 3SYD-201-S carries obsolete status with no continued manufacturing or supply. The 3YC-201-S is active production with 825 units in stock, ensuring ongoing availability and compatibility with current manufacturing standards including ROHS3 compliance.

Q: Are both parts manufactured by the same supplier? A: Both the 3SYD-201-S and 3YC-201-S are manufactured by Bivar Inc., ensuring consistency in design standards, quality control processes, and component reliability across the substitute relationship.