LED BLUE DIFFUSED T-1 3/4 5BWD0.345F Equivalent & Substitute Parts

Part Overview

The 5BWD0.345F is a blue diffused LED indicator manufactured by Bivar Inc., designed for through-hole mounting applications requiring discrete 3.5V radial configuration. This component is classified as obsolete, necessitating identification of functionally equivalent active alternatives to maintain design continuity and ensure supply chain availability. The part delivers 200mcd luminous intensity with a 45° viewing angle and operates at 20mA test current, making it suitable for standard LED indication circuits.

Substiute Parts

5BWD0.345F

Bivar Inc.In Stock: 7685BWD0.345F Datasheet

Current PartRFQ

151051BS04000

Würth ElektronikIn Stock: 7954151051BS04000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5BWD0.345F is based on strict alignment of the following critical parameters:

Primary Matching Criteria:

• Color: Blue (mandatory match)
• Lens Transparency: Diffused (mandatory match)
• Lens Size: 5mm form factor (mandatory match)
• Mounting Type: Through Hole radial configuration (mandatory match)
• Wavelength - Peak: 470nm blue spectrum (mandatory match)

Secondary Compatibility Parameters:

• Voltage - Forward (Vf): Acceptable range 3.0V to 3.6V for circuit compatibility
• Current - Test: 20mA baseline; substitutes supporting 20mA operation are compatible
• Package / Case: Radial lead configuration (mandatory match)

The substitute part 151051BS04000 from Würth Elektronik meets all primary matching criteria and operates within acceptable secondary parameter ranges, establishing it as a direct functional equivalent despite minor variations in millicandela rating and viewing angle.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: 151051BS04000 (Würth Elektronik)

The 151051BS04000 is the designated equivalent for the obsolete 5BWD0.345F based on the following engineering factors:

1. Product Status Alignment: The substitute is classified as Active, ensuring continued manufacturing availability and supply chain stability. The original part's obsolete status creates supply risk that this active alternative mitigates.

2. Compliance and Certification: Both parts share identical Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating equivalent environmental handling requirements. The substitute maintains ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements.

3. Functional Equivalence: All critical optical and electrical parameters align within engineering tolerance. The 0.3V forward voltage variance (3.5V to 3.2V) is within standard circuit design margins and does not require redesign of current-limiting resistor networks.

4. Performance Enhancement: The substitute's 500mcd rating versus the original 200mcd provides 2.5x brightness improvement, delivering superior visibility without circuit modification. The 5nm wavelength variance (470nm to 465nm) remains within blue spectrum perception tolerance.

5. Form Factor Compatibility: The 4.90mm lens diameter and radial through-hole configuration maintain mechanical compatibility with existing PCB layouts designed for 5mm T-1 3/4 form factors.

Selection Criteria Summary: Choose 151051BS04000 when the original 5BWD0.345F is unavailable. No circuit redesign is required for direct substitution in standard LED indication applications.

Frequently Asked Questions (FAQ)

Q: Can the 151051BS04000 be used as a direct drop-in replacement for the 5BWD0.345F?

A: Yes. Both components share identical mounting type (through-hole radial), lens size (5mm form factor), color (blue), lens transparency (diffused), and test current (20mA). The forward voltage difference of 0.3V is within standard circuit tolerance and does not require resistor recalculation in typical LED indication circuits.

Q: What is the significance of the millicandela rating difference (200mcd vs. 500mcd)?

A: The 151051BS04000 provides 2.5 times greater luminous intensity. This enhancement improves visibility in ambient light conditions without requiring circuit modification. Applications requiring the original brightness level can operate the substitute at reduced current if necessary, though this is not required for standard indication use.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts share identical Moisture Sensitivity Level (MSL) rating of 1 (Unlimited). The substitute meets ROHS3 compliance and REACH unaffected status, satisfying current regulatory requirements. Both carry EAR99 ECCN classification and identical HTSUS code 8541.41.0000.

Q: How do the viewing angles compare, and does the 5° difference matter?

A: The original part specifies 45° viewing angle; the substitute specifies 40°. This 5° variance represents a minor reduction in the visibility cone. For standard LED indication applications where the LED is viewed from a relatively fixed angle, this difference is negligible. Applications requiring wide-angle visibility should verify the 40° specification meets design requirements.

Q: What is the wavelength difference between 470nm and 465nm?

A: Both wavelengths fall within the blue spectrum range and are perceptually identical to the human eye. The 5nm variance is within standard blue LED manufacturing tolerance and does not affect color consistency or visual indication function.

Q: Is the 4.90mm lens diameter compatible with 5mm mounting holes?

A: Yes. The 4.90mm diameter is within the 5mm form factor specification and maintains mechanical compatibility with standard 5mm LED mounting holes and through-hole PCB layouts. No mechanical redesign is required.

Q: Why is the original part classified as obsolete?

A: Obsolete status indicates the manufacturer (Bivar Inc.) has discontinued production. The 151051BS04000 from Würth Elektronik is actively manufactured and maintains 7,849 pieces in stock, providing reliable supply chain continuity.

Q: Can I use the 151051BS04000 in applications originally designed for the 5BWD0.345F without any modifications?

A: Yes, for standard LED indication circuits. The substitute operates within compatible electrical and mechanical parameters. No circuit redesign, resistor recalculation, or PCB layout modification is required for direct substitution in typical applications.