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

Part Overview

The Bivar Inc. 5BWD0.345 is a blue diffused LED indicator in T-1 3/4 (5mm) through-hole package, rated at 3.5V forward voltage and 200mcd brightness. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and production continuity. The part operates at 20mA test current with a 45° viewing angle and features a round domed lens design typical of discrete LED indication applications.

Substiute Parts

5BWD0.345

Bivar Inc.In Stock: 8685BWD0.345 Datasheet

Current PartRFQ

151051BS04000

Würth ElektronikIn Stock: 7954151051BS04000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5BWD0.345 are identified based on strict alignment with the following core parameters:

Primary Compatibility Criteria:

• Lens size: 5mm diameter (T-1 3/4 form factor)
• Mounting type: Through hole radial configuration
• Color: Blue
• Lens transparency: Diffused
• Wavelength range: 470nm peak (blue spectrum)
• Forward voltage: 3.0V to 3.5V range
• Test current: 20mA standard
• Package type: Radial through-hole

Allowable Parameter Variations:

• Millicandela rating: Substitute may exceed original brightness (200mcd minimum acceptable)
• Viewing angle: Substitute may differ within ±10° tolerance
• Height: Substitute may vary within ±0.5mm
• Vf tolerance: Substitute within 0.3V of original specification

The Würth Elektronik 151051BS04000 meets these criteria as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: Würth Elektronik 151051BS04000

The 151051BS04000 is the qualified substitute for the obsolete 5BWD0.345. Selection is based on the following engineering factors:

Compliance and Availability:

• The substitute is in active production status, ensuring long-term supply chain continuity
• RoHS3 compliant and REACH unaffected, meeting current regulatory requirements
• Inventory availability: 7,849 pieces in stock versus 774 pieces for the obsolete part
• Identical ECCN (EAR99) and HTSUS classification (8541.41.0000)

Electrical Compatibility:

• Forward voltage difference of 0.3V (3.2V vs. 3.5V) is within acceptable tolerance for series resistor adjustment in typical LED indicator circuits
• Test current specification remains at 20mA, maintaining circuit design consistency
• Peak wavelength variation of 5nm (465nm vs. 470nm) remains within blue spectrum perception

Mechanical and Optical Compatibility:

• Physical form factor is equivalent: 5mm round through-hole radial package
• Height difference of 0.35mm is negligible for standard PCB assembly
• Lens diameter tolerance (4.90mm vs. 5mm nominal) is within manufacturing standards
• Diffused lens transparency is identical
• Viewing angle difference of 5° (40° vs. 45°) is acceptable for indication applications

Performance Consideration:

• The substitute provides 500mcd brightness versus 200mcd original specification, representing a 2.5× brightness increase. This enhanced brightness is compatible with applications requiring the original part and does not introduce incompatibility.

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 151051BS04000 be used as a direct replacement for the Bivar 5BWD0.345 without circuit modification?

A: The substitute can be used with minimal circuit adjustment. The 0.3V forward voltage difference requires recalculation of the series resistor value to maintain 20mA test current. The formula adjustment is: R_new = (V_supply - 3.2V) / 0.020A. No other circuit modifications are necessary.

Q: What is the impact of the 500mcd brightness rating on the 151051BS04000 compared to the 200mcd original?

A: The higher brightness is a performance enhancement. If the original circuit was designed for 200mcd visibility, the substitute will provide increased brightness without causing functional incompatibility. If brightness control is required, a lower series resistor value can be used to reduce current below 20mA.

Q: Are the physical dimensions compatible for PCB assembly?

A: Yes. The 5mm round through-hole form factor is identical. The 0.35mm height difference (9.30mm vs. 8.95mm) is within standard PCB clearance tolerances and does not affect assembly or housing fit.

Q: Does the 5° viewing angle difference affect application performance?

A: The 40° viewing angle of the substitute is slightly narrower than the 45° original. For standard indication applications, this difference is negligible. For applications requiring maximum wide-angle visibility, the original specification should be verified against actual application requirements.

Q: What is the wavelength difference between the two parts?

A: The peak wavelength differs by 5nm (465nm vs. 470nm). Both wavelengths are within the blue spectrum range and produce visually identical blue color perception. This difference is not perceptible to human vision in indication applications.

Q: Is the substitute RoHS compliant?

A: Yes. The Würth Elektronik 151051BS04000 is RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the lead time and availability for the substitute part?

A: The substitute is in active production with 7,849 pieces currently in stock, providing immediate availability and long-term supply chain security compared to the obsolete original part.