RF Power Divider 40278 Equivalent & Substitute Parts

Part Overview

The TTM Technologies 40278 is an RF power divider module designed for operation in the 8 GHz to 12.4 GHz frequency band with 1.2 dB insertion loss. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations. The module is packaged in a standard form factor measuring 2.500" L x 2.000" W x 0.370" H and carries unlimited moisture sensitivity rating (MSL 1).

Substiute Parts

40278

TTM Technologies, Inc.In Stock: 10718740278 Datasheet

Current PartRFQ

PWD-5532-03-SMA-79

Cinch Connectivity Solutions Midwest MicrowaveIn Stock: 1134PWD-5532-03-SMA-79 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 40278 is based on the following critical parameters:

Frequency Coverage: The substitute must operate within or encompass the 8 GHz to 12.4 GHz operating band of the original part. The PWD-5532-03-SMA-79 provides extended frequency coverage from 2 GHz to 18 GHz, fully containing the required band.

Package Classification: Both parts are classified as modules with compatible form factors. The substitute maintains module-level packaging suitable for direct integration.

Electrical Performance: Insertion loss and isolation characteristics determine signal integrity. The substitute specification of 1 dB insertion loss meets or exceeds the original 1.2 dB performance requirement.

Moisture Sensitivity: Both parts carry MSL 1 rating, indicating unlimited moisture sensitivity tolerance and compatible handling requirements.

Regulatory Compliance: Both parts are classified under ECCN EAR99, maintaining consistent export control status.

Parameter Comparison

Engineering Selection Recommendations

The PWD-5532-03-SMA-79 is an active product with current manufacturing support, addressing the obsolescence status of the 40278. The substitute provides superior insertion loss performance (1 dB versus 1.2 dB) and extended frequency coverage encompassing the original operating band. The specified 20 dB minimum isolation provides additional performance margin for applications requiring signal separation.

Dimensional differences exist in width and height; the substitute is narrower (0.750" versus 2.000") and marginally taller (0.380" versus 0.370"). Length remains identical at 2.500". These dimensional variations require mechanical integration assessment within the target application.

Both parts maintain identical moisture sensitivity classification and export control status, ensuring consistent supply chain and regulatory compliance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the PWD-5532-03-SMA-79 directly replace the 40278 in existing designs?

A: Electrical compatibility is established through frequency band containment, insertion loss improvement, and isolation specification. Mechanical compatibility requires verification of the dimensional differences, particularly the reduced width (0.750" versus 2.000") and connector interface compatibility.

Q: What is the significance of the extended frequency range in the substitute?

A: The PWD-5532-03-SMA-79 operates from 2 GHz to 18 GHz, fully encompassing the original 8 GHz to 12.4 GHz band. This extended range provides design flexibility for future applications without component substitution.

Q: Are there compliance differences between the original and substitute parts?

A: Both parts carry identical ECCN EAR99 classification and MSL 1 moisture sensitivity rating. The substitute is RoHS non-compliant, which may require assessment against application-specific compliance requirements.

Q: What does the 20 dB isolation specification indicate?

A: Isolation (minimum 20 dB) specifies the attenuation between output ports, indicating the degree of signal separation. This parameter was not specified for the original 40278 but represents a performance characteristic of the substitute.

Q: How do the dimensional differences affect integration?

A: The substitute is significantly narrower (0.750" versus 2.000" width) while maintaining identical length and similar height. PCB layout and mechanical mounting must accommodate these dimensional changes. Connector type and interface compatibility must be verified independently.