3BWT-S LED Blue Clear T-1 Through Hole - Equivalent & Substitute Parts

Part Overview

The 3BWT-S is a blue LED indication component manufactured by Bivar Inc., featuring a clear lens with 25 millicandela output at 4V forward voltage. This discrete through-hole component is designed for standard LED indication applications requiring 3mm T-1 form factor.

The 3BWT-S is classified as obsolete. Locating active, equivalent alternatives is necessary for new designs and ongoing production requirements where original stock availability is limited.

Substiute Parts

3BWT-S

Bivar Inc.In Stock: 10073BWT-S Datasheet

Current PartRFQ

3BWD-S

Bivar Inc.In Stock: 6893BWD-S Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3BWD-S qualifies as a direct substitute for the 3BWT-S based on the following identical electrical and mechanical parameters:

Matching Parameters:

• Manufacturer: Bivar Inc.
• Color: Blue
• Lens Size: 3mm, T-1
• Voltage - Forward (Vf): 4V
• Current - Test: 20mA
• Viewing Angle: Standard blue LED wavelength range (430nm peak)
• Mounting Type: Through Hole
• Height (Max): 4.50mm
• Package / Case: Radial
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Variance Parameters:

• Lens Transparency: Clear (3BWT-S) vs. Diffused (3BWD-S)
• Millicandela Rating: 25mcd (3BWT-S) vs. 10mcd (3BWD-S)
• Viewing Angle: 30° (3BWT-S) vs. 40° (3BWD-S)
• Product Status: Obsolete (3BWT-S) vs. Active (3BWD-S)

The substitution is valid for applications where the lower brightness output and wider viewing angle of the diffused variant are acceptable.

Parameter Comparison

Engineering Selection Recommendations

The 3BWD-S is an active product from Bivar Inc. and provides continuity for applications previously using the obsolete 3BWT-S. Both components maintain identical electrical characteristics (4V Vf, 20mA test current) and mechanical form factors (3mm T-1 through-hole radial package, 4.50mm max height).

Selection of the 3BWD-S over the 3BWT-S is appropriate where:

• New production runs require active, continuously available stock
• Application design permits operation with 10mcd brightness versus the original 25mcd
• A wider 40° viewing angle is compatible with the intended installation geometry
• Diffused lens transmission characteristics are acceptable for the indication function

The equivalent electrical parameters and matching MSL rating (1 - Unlimited) support direct substitution without circuit redesign or thermal management modifications.

Frequently Asked Questions (FAQ)

Q: Can the 3BWD-S directly replace the 3BWT-S in existing circuit designs?

A: Direct substitution is supported for the electrical interface. The forward voltage (4V), test current (20mA), and package form factor (3mm T-1 radial through-hole) are identical. Design validation is required only if brightness output or viewing angle characteristics are critical to application performance.

Q: What is the primary difference between 3BWT-S and 3BWD-S?

A: The 3BWT-S features a clear lens with 25mcd output and 30° viewing angle. The 3BWD-S features a diffused lens with 10mcd output and 40° viewing angle. The diffused lens produces a softer light distribution across a wider viewing angle at reduced intensity.

Q: Why is the 3BWT-S classified as obsolete?

A: The product status reflects the manufacturing and distribution status. The 3BWD-S serves as the active equivalent from Bivar Inc., providing the same core functionality with lens transmission and brightness variations.

Q: Are there compliance differences between the two parts?

A: Both parts carry identical compliance classifications: MSL 1 (Unlimited), ECCN EAR99, and HTSUS 8541.41.0000. The 3BWD-S is RoHS3 compliant. Compliance requirements are met equally by either component for standard through-hole LED indication applications.

Q: What mounting and thermal considerations apply to the 3BWD-S substitution?

A: The mechanical footprint is identical: 3mm T-1 radial package with 4.50mm maximum height. No PCB layout modifications or thermal management changes are required for the substitution.