AFCT-91DRDHZ Equivalent & Substitute Parts

Part Overview

The AFCT-91DRDHZ is a 400G DR4 transceiver module manufactured by Broadcom Limited, designed for high-speed Ethernet applications. This module operates at 100Gbps data rate with a 1318nm wavelength and is housed in a pluggable QSFP form factor with MPO connector interface. The product is currently classified as Obsolete, making identification of functionally equivalent substitute components essential for system maintenance, upgrades, and procurement planning. Substitute parts must maintain compatibility across critical electrical and mechanical parameters to ensure seamless integration into existing network infrastructure.

Substiute Parts

AFCT-91DRDHZ

Broadcom LimitedIn Stock: 985AFCT-91DRDHZ Datasheet

Current PartRFQ

FTCD4523E3PCM

CoherentIn Stock: 833FTCD4523E3PCM Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AFCT-91DRDHZ are identified based on strict alignment of the following critical parameters:

Mandatory Compatibility Parameters:

• Connector Type: MPO interface required for physical compatibility
• Mounting Type: Pluggable QSFP form factor for slot compatibility
• Voltage Supply Range: 3.135V ~ 3.465V for power delivery compatibility
• Applications: Ethernet for protocol compatibility
• Moisture Sensitivity Level: 1 (Unlimited) for handling and storage compatibility

Functional Parameters (Allowable Variation):

• Data Rate: Substitute parts may operate at equal or higher data rates
• Wavelength: Substitute parts must operate within compatible optical bands (1300nm region)

The FTCD4523E3PCM from Coherent meets all mandatory compatibility parameters and qualifies as a functional substitute despite operating at a higher data rate (425Gbps) and slightly different wavelength (1311nm), both of which are within acceptable operational ranges for the 400G DR4 application category.

Parameter Comparison

Engineering Selection Recommendations

FTCD4523E3PCM Selection Basis:

The FTCD4523E3PCM qualifies as a direct substitute for the obsolete AFCT-91DRDHZ based on the following engineering criteria:

1. Electrical Compatibility: Both parts operate within the identical voltage supply range (3.135V ~ 3.465V), ensuring power delivery compatibility without modification to host system power distribution.

2. Physical Compatibility: Both parts utilize MPO connectors and pluggable QSFP form factors, enabling direct slot-level replacement without mechanical adaptation.

3. Environmental Compatibility: Both parts carry Moisture Sensitivity Level 1 (Unlimited), indicating identical handling and storage requirements.

4. Regulatory Alignment: Both parts share the same HTSUS classification (8517.62.0090), confirming equivalent tariff treatment and regulatory standing.

5. Product Status Advantage: The FTCD4523E3PCM is classified as Active product status, ensuring ongoing availability, technical support, and supply chain continuity compared to the Obsolete AFCT-91DRDHZ.

6. Performance Headroom: The higher data rate capability (425Gbps versus 100Gbps) of the substitute part provides operational margin and future-proofing for network infrastructure upgrades.

Frequently Asked Questions (FAQ)

Q: Can the FTCD4523E3PCM directly replace the AFCT-91DRDHZ without system modifications?

A: Yes. Both parts share identical voltage supply ranges (3.135V ~ 3.465V), connector types (MPO), mounting types (Pluggable QSFP), and moisture sensitivity levels (MSL 1). Direct slot replacement is supported without host system modifications.

Q: What is the significance of the different data rates (100Gbps vs. 425Gbps)?

A: The FTCD4523E3PCM operates at a higher data rate than the original part. This represents enhanced capability and does not create compatibility issues. The substitute part will function correctly in systems designed for the lower data rate specification.

Q: Are the wavelengths (1318nm vs. 1311nm) compatible?

A: Yes. Both wavelengths operate within the 1300nm optical band and are compatible for 400G DR4 Ethernet applications. The 7nm difference falls within acceptable operational tolerances for this application category.

Q: What is the inventory status for the substitute part?

A: The FTCD4523E3PCM has 785 pieces of new original stock available, compared to 934 pieces for the main part. Both parts are currently in stock.

Q: Does the FTCD4523E3PCM have REACH compliance documentation?

A: REACH status information for the FTCD4523E3PCM is available upon request from the manufacturer (Coherent). Contact the supplier for specific compliance documentation.

Q: Why is the main part classified as Obsolete?

A: The AFCT-91DRDHZ is end-of-life and no longer in active production. The FTCD4523E3PCM, classified as Active, represents the current production equivalent for this application category.