AFCT-5705LZ Equivalent & Substitute Parts

Part Overview

The AFCT-5705LZ is a transceiver module manufactured by Broadcom Limited, designed for Ethernet applications with a data rate of 1.25Gbd and 1310nm wavelength. This is a pluggable SFP (Small Form-factor Pluggable) module with LC duplex connectors, operating at 3.14V to 3.47V supply voltage. The product is currently obsolete, making equivalent and substitute parts necessary for system maintenance, upgrades, and continued deployment in legacy network infrastructure.

Substiute Parts

AFCT-5705LZ

Broadcom LimitedIn Stock: 661AFCT-5705LZ Datasheet

Current PartRFQ

AFCT-725SMZ

Broadcom LimitedIn Stock: 1046AFCT-725SMZ Datasheet

SimilarRFQ

AFCT-5705LZ-C

ProLabsIn Stock: 96410AFCT-5705LZ-C Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AFCT-5705LZ is determined by the following critical parameters:

• Wavelength: 1310nm (infrared, long-wavelength band)
• Connector Type: LC (standard for SFP modules)
• Mounting Type: Pluggable form factor (SFP or compatible)
• Supply Voltage Compatibility: Operating voltage range must support system requirements
• RoHS and Compliance Status: Environmental and regulatory compliance

The identified substitute parts maintain the 1310nm wavelength and LC connector specifications. However, differences in data rate, form factor (SFP vs. SFP28), and voltage specifications must be evaluated for specific deployment scenarios.

Parameter Comparison

Engineering Selection Recommendations

AFCT-5705LZ-C (ProLabs): This is the primary equivalent substitute. It is manufactured as an Avago AFCT-5705LZ compatible module, maintains the same 1310nm wavelength, LC connector, and SFP form factor. The part is currently active in production status, ensuring availability. RoHS compliance is confirmed. This substitute is suitable for direct replacement in systems requiring 1.25Gbd Ethernet transceiver functionality.

AFCT-725SMZ (Broadcom Limited): This substitute shares the 1310nm wavelength and LC connector with the main part but operates at 25Gbps data rate and uses the SFP28 form factor. The supply voltage is 3.3V, which differs from the AFCT-5705LZ specification. This part is in Last Time Buy status. Selection of this substitute requires verification that the host system supports SFP28 form factor and 25Gbps operation, as it represents a performance upgrade rather than a direct equivalent.

Frequently Asked Questions (FAQ)

Q: Can AFCT-5705LZ-C be used as a direct replacement for AFCT-5705LZ?

A: Yes. AFCT-5705LZ-C is designed as a compatible equivalent, maintaining the same wavelength (1310nm), connector type (LC), and form factor (SFP). Both operate in Ethernet applications with the same optical specifications.

Q: What is the key difference between AFCT-725SMZ and AFCT-5705LZ?

A: AFCT-725SMZ operates at 25Gbps compared to AFCT-5705LZ at 1.25Gbd, and uses SFP28 form factor instead of SFP. The host system must support SFP28 modules and higher data rates for this substitute to function.

Q: Are all substitutes RoHS compliant?

A: Yes. AFCT-5705LZ-C and AFCT-725SMZ are both RoHS compliant, meeting environmental regulatory requirements equivalent to or compatible with the original part.

Q: Why is AFCT-5705LZ marked as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Broadcom Limited. Substitute parts ensure continued availability for system maintenance and replacement needs.

Q: Does voltage compatibility matter when selecting a substitute?

A: Yes. The AFCT-5705LZ operates at 3.14V to 3.47V. AFCT-725SMZ operates at 3.3V, which falls within this range but represents a different specification. AFCT-5705LZ-C voltage is not specified in available data. Verify host system voltage requirements before selection.

Q: What is the difference between SFP and SFP28 form factors?

A: SFP (Small Form-factor Pluggable) and SFP28 are both pluggable transceiver modules with LC connectors. SFP28 supports higher data rates (up to 28Gbps) and has different physical dimensions. Host systems must explicitly support SFP28 modules; SFP28 modules are not backward compatible with SFP-only slots.