SFH350 Equivalent & Substitute Parts

Part Overview

The SFH350 is a fiber optic transmitter operating at 850nm wavelength, manufactured by Infineon Technologies. This component is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing system design and maintenance. The SFH350 was designed for applications requiring 850nm optical transmission with specific electrical and mechanical characteristics. Due to its discontinued status, engineers must evaluate functionally equivalent alternatives that maintain compatibility with existing system requirements.

Substiute Parts

SFH350

Infineon TechnologiesIn Stock: 9502SFH350 Datasheet

Current PartRFQ

HFBR-2523Z

Broadcom LimitedIn Stock: 1782HFBR-2523Z Datasheet

MFR RecommendedRFQ

HFBR-2533Z

Broadcom LimitedIn Stock: 1927HFBR-2533Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SFH350 are identified based on the following criteria derived from the provided data:

Primary Substitution Parameters:

• Wavelength compatibility: 850nm operation
• Moisture Sensitivity Level: MSL 3 (168 Hours)
• REACH Status: REACH Unaffected
• RoHS Compliance: Parts meeting modern compliance standards

The substitute parts listed (HFBR-2523Z and HFBR-2533Z) are Broadcom Limited fiber optic receivers. While these parts differ in function (receiver vs. transmitter) and electrical specifications from the SFH350, they are provided in the manufacturer's substitute list and share the same MSL rating and REACH status. Selection between substitutes depends on specific application requirements regarding data rate, supply voltage, and power sensitivity.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The SFH350 is discontinued, requiring substitution for new designs or system maintenance. Both HFBR-2523Z and HFBR-2533Z are active products with current manufacturing support.

Compliance Consideration: Both substitute parts meet ROHS3 compliance and maintain REACH Unaffected status, aligning with modern regulatory requirements. The SFH350 is RoHS non-compliant; systems requiring RoHS compliance must use the substitute parts.

Electrical Specification Consideration: HFBR-2523Z operates at 4.75V to 5.25V supply with 3.7mA current consumption and 40KBd data rate. HFBR-2533Z operates at 7V supply with 10mA current consumption, -24dBm minimum receivable power, and 40KBd data rate.

Selection between HFBR-2523Z and HFBR-2533Z depends on system supply voltage availability and sensitivity requirements.

Frequently Asked Questions (FAQ)

Q: Why are the substitute parts (HFBR-2523Z and HFBR-2533Z) listed as receivers when the SFH350 is a transmitter? A: The substitute list provided by the manufacturer indicates these parts as functional alternatives for the SFH350 application. System designers must verify that receiver functionality meets their circuit requirements.

Q: Can HFBR-2523Z and HFBR-2533Z be used interchangeably? A: Both parts operate at 40KBd data rate and share MSL 3 rating. However, they differ in supply voltage (4.75V-5.25V vs. 7V) and current consumption (3.7mA vs. 10mA). Selection depends on available system supply voltage and power budget constraints.

Q: What is the significance of MSL 3 (168 Hours) rating? A: MSL 3 indicates the component requires controlled moisture exposure during storage and handling. All three parts share this rating, ensuring consistent handling requirements across the main part and substitutes.

Q: Are there packaging differences between the main part and substitutes? A: The SFH350 packaging is not specified in the provided data. Both HFBR-2523Z and HFBR-2533Z are supplied in Bulk packaging. Physical form factor compatibility must be verified for mechanical integration.

Q: Do the substitute parts maintain the same wavelength as the SFH350? A: Wavelength specifications are not provided for the substitute parts in the available data. System designers must obtain detailed optical specifications from Broadcom to confirm wavelength compatibility for 850nm applications.