AFBR-S4K33C0125B Equivalent & Substitute Parts

Part Overview

The AFBR-S4K33C0125B is a photodiode optical sensor manufactured by Broadcom Limited, designed for 430nm wavelength detection in a 12-WFBGA surface mount package. This component is classified as an avalanche photodiode with an active area of 9mm² and operates across the temperature range of -40°C to 60°C.

The AFBR-S4K33C0125B is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this optical sensor.

Substiute Parts

AFBR-S4K33C0125B

Broadcom LimitedIn Stock: 836AFBR-S4K33C0125B Datasheet

Current PartRFQ

AFBR-S4N33C013

Broadcom LimitedIn Stock: 1326AFBR-S4N33C013 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AFBR-S4K33C0125B is determined by the following critical parameters:

Primary Substitution Criteria:

• Active area matching (9mm²)
• Surface mount packaging compatibility
• Wavelength detection capability in the ultraviolet to visible spectrum
• Maximum reverse voltage rating sufficient for application requirements
• Operating temperature range compatibility
• RoHS compliance status

The AFBR-S4N33C013 is identified as a manufacturer-recommended substitute. While this part operates at 420nm wavelength (compared to 430nm for the main part) and features a different package designation (9-UBGA versus 12-WFBGA), both components share the same active area of 9mm², surface mount mounting type, and equivalent spectral detection capability. The AFBR-S4N33C013 provides an extended operating temperature range (-40°C to 85°C) and broader spectral range coverage (300nm to 900nm), supporting ultraviolet detection applications.

Parameter Comparison

Engineering Selection Recommendations

Compatibility Assessment:

The AFBR-S4N33C013 serves as a direct substitute for the AFBR-S4K33C0125B based on the following engineering factors:

1. Active Area Equivalence: Both components feature identical 9mm² active areas, ensuring equivalent light collection and detection characteristics.

2. Spectral Compatibility: The AFBR-S4N33C013 operates at 420nm with a broad spectral range of 300nm to 900nm, encompassing the 430nm detection capability of the main part. This extended spectral coverage supports applications requiring ultraviolet sensitivity.

3. Reverse Voltage Consideration: The AFBR-S4N33C013 maximum reverse voltage rating of 26.9V is lower than the main part's 30.25V. Circuit designs operating near the upper voltage limit of the main part require verification against the substitute's voltage specification.

4. Temperature Range Extension: The AFBR-S4N33C013 extends the maximum operating temperature to 85°C, compared to 60°C for the main part. Applications requiring operation at elevated temperatures benefit from this extended range.

5. Regulatory Compliance: Both components maintain ROHS3 compliance and EAR99 export classification, supporting equivalent regulatory requirements.

6. Packaging Transition: The shift from 12-WFBGA to 9-UBGA packaging requires PCB layout and footprint verification to ensure mechanical and electrical compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: Can the AFBR-S4N33C013 directly replace the AFBR-S4K33C0125B in existing designs?

A: Direct replacement requires verification of three factors: PCB footprint compatibility between 12-WFBGA and 9-UBGA packages, maximum reverse voltage requirements (26.9V limit for the substitute), and operating temperature range requirements. The active area and spectral detection capability are equivalent.

Q: What is the wavelength difference between these two parts, and does it affect functionality?

A: The main part operates at 430nm while the substitute operates at 420nm. The AFBR-S4N33C013 provides a spectral range of 300nm to 900nm, which encompasses the 430nm detection capability. The 10nm wavelength difference falls within the spectral response curve of the substitute part.

Q: Are there package compatibility issues between 12-WFBGA and 9-UBGA?

A: Yes. These are different ball grid array packages with different footprints, pin counts, and mechanical dimensions. PCB redesign and revalidation are required for package migration. Consult package datasheets for specific dimensional and electrical pin mapping information.

Q: What is the significance of the maximum reverse voltage difference?

A: The AFBR-S4K33C0125B supports 30.25V maximum reverse voltage, while the AFBR-S4N33C013 supports 26.9V. Applications operating the photodiode near or at the upper voltage limit must confirm that the substitute's lower rating remains acceptable for the intended circuit design.

Q: Do both parts have equivalent moisture sensitivity requirements?

A: No. The main part has MSL 1 (Unlimited), while the substitute has MSL 3 (168 Hours). The substitute requires more stringent moisture control during storage and handling. Implement appropriate moisture barrier packaging and storage conditions for the AFBR-S4N33C013.

Q: Are both parts still available for procurement?

A: Both components are classified as obsolete. Availability is limited to existing inventory. Confirm current stock status with authorized distributors before finalizing design decisions based on substitution.