BL-B4634 Equivalent & Substitute Parts

Part Overview

The BL-B4634 is a red LED indicator from American Bright Optoelectronics Corporation, designed for through-hole mounting applications. This T-1 3/4 (5mm) package component operates at 2V forward voltage with a 200mcd brightness rating and 628nm dominant wavelength. The part is currently in active production status with 830 units available in inventory. Substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable.

Substiute Parts

BL-B4634

American Bright Optoelectronics CorporationIn Stock: 924BL-B4634 Datasheet

Current PartRFQ

HLMP-3316

Broadcom LimitedIn Stock: 5406HLMP-3316 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BL-B4634 are identified based on the following critical parameters that determine functional compatibility:

• Package Type: T-1 3/4 (5mm) through-hole radial configuration
• Color and Lens Transparency: Red with clear lens
• Mounting Interface: Through-hole PCB mounting
• Electrical Operating Range: Forward voltage and test current within acceptable design tolerances
• Optical Characteristics: Wavelength in the red spectrum (620-640nm range) with comparable brightness output
• Regulatory Compliance: EAR99 export classification and applicable RoHS/REACH status

The HLMP-3316 from Broadcom Limited qualifies as a substitute based on matching package geometry, color specification, mounting type, and wavelength classification. Variations in forward voltage (1.9V vs. 2V), test current (10mA vs. 20mA), brightness rating (60mcd vs. 200mcd), and viewing angle (35° vs. 15°) represent design trade-offs that must be evaluated within the specific application circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the BL-B4634 and HLMP-3316 maintain active product status and share identical export classification (EAR99) and tariff coding. The HLMP-3316 carries ROHS3 compliance certification and REACH unaffected status with MSL Level 1 (unlimited moisture sensitivity rating).

Selection between these parts depends on application-specific requirements:

• BL-B4634 is appropriate for applications requiring higher brightness output (200mcd) and narrower viewing angle (15°) with standard 2V forward voltage operation.
• HLMP-3316 is suitable for applications where lower brightness (60mcd) and wider viewing angle (35°) are acceptable, with the advantage of lower forward voltage (1.9V) and reduced test current (10mA), which may reduce power consumption in the circuit design.

Both parts are physically compatible with T-1 3/4 through-hole PCB layouts. The 1.18mm height difference (10.37mm vs. 9.19mm) is within typical PCB assembly tolerances for indicator applications.

Frequently Asked Questions (FAQ)

Q: Can HLMP-3316 be used as a direct replacement for BL-B4634 in existing designs?

A: Physical and electrical compatibility exists for through-hole PCB mounting. However, the HLMP-3316 operates at lower brightness (60mcd vs. 200mcd) and has a wider viewing angle (35° vs. 15°). Circuit designs relying on the higher brightness or narrower viewing angle of the BL-B4634 must be re-evaluated before substitution.

Q: What are the key differences in electrical operation?

A: The HLMP-3316 has a forward voltage of 1.9V compared to 2V for the BL-B4634, and operates at a test current of 10mA versus 20mA. These differences affect power consumption and may require circuit redesign depending on the current-limiting resistor values and power supply specifications.

Q: Are both parts suitable for the same PCB footprint?

A: Yes. Both parts use the T-1 3/4 (5mm) through-hole radial package. The maximum height difference of 1.18mm is within standard PCB assembly clearance specifications for indicator applications.

Q: What compliance certifications apply to each part?

A: Both parts are classified as EAR99 for export purposes and share the same HTSUS tariff code (8541.41.0000). The HLMP-3316 additionally carries ROHS3 compliance and REACH unaffected status.

Q: How do the wavelength specifications compare?

A: Both parts emit in the red spectrum. The BL-B4634 has a dominant wavelength of 628nm (peak 640nm), while the HLMP-3316 has a dominant wavelength of 626nm (peak 635nm). This 2nm difference is imperceptible to human vision and both parts are suitable for standard red indicator applications.