BL-3535CB Equivalent & Substitute Parts

Part Overview

The BL-3535CB is an ultraviolet (UV) light-emitting diode manufactured by American Bright Optoelectronics Corporation, designed for UVC applications at 275nm wavelength. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs.

The BL-3535CB operates at 6V forward voltage with a maximum forward current of 150mA and features a 120° viewing angle in a surface-mount 1414 (3535 metric) package. As an obsolete product, sourcing equivalent or substitute components is essential for maintenance, repair, and production continuity.

Substiute Parts

BL-3535CB

American Bright Optoelectronics CorporationIn Stock: 823BL-3535CB Datasheet

Current PartRFQ

CUD7GF1B

SETi/Seoul ViosysIn Stock: 1207CUD7GF1B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BL-3535CB is determined by the following critical parameters:

Wavelength Compatibility: The substitute part must operate at 275nm (±5nm tolerance acceptable within UV-C specifications).

Electrical Compatibility: Forward voltage must be 6V typical to ensure direct circuit compatibility without redesign. Forward current rating must be equal to or greater than 150mA maximum.

Package Compatibility: The substitute must use the 1414 (3535 metric) surface-mount package to ensure mechanical fit on existing PCB layouts.

Viewing Angle: The substitute viewing angle must be equal to or greater than 120° to maintain or improve optical coverage characteristics.

Compliance & Status: The substitute should be active product status with current RoHS compliance certification to ensure long-term availability and regulatory adherence.

Parameter Comparison

Engineering Selection Recommendations

The CUD7GF1B from SETi/Seoul Viosys is a direct substitute for the BL-3535CB based on the following engineering criteria:

Electrical Equivalence: Both components operate at 6V forward voltage with identical wavelength specifications at 275nm. The CUD7GF1B maximum forward current of 200mA exceeds the BL-3535CB requirement of 150mA, providing operational margin within the same circuit topology.

Mechanical Compatibility: Both components use the 1414 (3535 metric) surface-mount package, ensuring identical PCB footprint and assembly compatibility without layout modifications.

Optical Compatibility: The CUD7GF1B viewing angle of 125° exceeds the BL-3535CB specification of 120°, maintaining or improving optical performance in existing applications.

Compliance & Availability: The CUD7GF1B holds active product status with ROHS3 compliance certification, ensuring long-term component availability and regulatory adherence. The BL-3535CB obsolete status makes the CUD7GF1B the appropriate production alternative.

Moisture Handling: Both components share identical MSL rating of 3 (168 hours), requiring equivalent moisture control during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Can the CUD7GF1B directly replace the BL-3535CB without circuit modification?

A: Yes. Both components operate at 6V forward voltage with identical 275nm wavelength specifications and use the same 1414 (3535 metric) surface-mount package. No circuit redesign is required for direct substitution.

Q: What is the significance of the higher 200mA current rating on the CUD7GF1B compared to the 150mA rating on the BL-3535CB?

A: The CUD7GF1B maximum forward current of 200mA exceeds the BL-3535CB specification of 150mA. This provides additional operational margin and does not create compatibility issues when the circuit is designed for 150mA operation. The component will operate safely at or below the circuit's designed current level.

Q: Are there differences in viewing angle between these components?

A: The CUD7GF1B has a 125° viewing angle compared to the BL-3535CB 120° viewing angle. This 5° difference represents an improvement in optical coverage and does not negatively impact existing optical system designs.

Q: What is the difference between RoHS Compliant and ROHS3 Compliant?

A: Both certifications indicate compliance with Restriction of Hazardous Substances regulations. ROHS3 represents the current version of the RoHS directive. Both components meet hazardous substance restrictions and are suitable for regulated applications.

Q: Are the moisture sensitivity levels equivalent?

A: Yes. Both the BL-3535CB and CUD7GF1B carry MSL rating 3 (168 hours), requiring identical moisture control procedures during storage, handling, and assembly processes.

Q: Why is the BL-3535CB listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The CUD7GF1B active product status ensures ongoing availability for current and future applications requiring 275nm UV-C LED functionality in the 3535 metric package.