RF Directional Coupler 1G1304-30 Equivalent & Substitute Parts

Part Overview

The 1G1304-30 is an RF directional coupler manufactured by TTM Technologies, Inc., designed for general-purpose applications in the 800MHz to 1GHz frequency range. This component operates at 30dB coupling factor with a maximum power handling of 150W and features a 4-SMD, No Lead package configuration. The product is currently obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility for existing designs and new applications requiring similar RF coupling characteristics.

Substiute Parts

1G1304-30

TTM Technologies, Inc.In Stock: 21631G1304-30 Datasheet

Current PartRFQ

X3C09P2-30S

TTM Technologies, Inc.In Stock: 2995X3C09P2-30S Datasheet

MFR RecommendedRFQ

X4C09F1-30S

TTM Technologies, Inc.In Stock: 4710X4C09F1-30S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1G1304-30 are identified based on the following critical parameters that determine functional compatibility:

• Coupler Type: Standard (must match)
• Frequency Range: 800MHz ~ 1GHz minimum coverage (substitute must support or exceed this range)
• Coupling Factor: 30dB nominal (tolerance of ±0.2dB acceptable)
• Package Configuration: 4-SMD form factor
• RoHS Compliance: RoHS Compliant (environmental and regulatory requirement)
• Moisture Sensitivity Level: MSL 1 (Unlimited)

The two substitute parts identified—X3C09P2-30S and X4C09F1-30S—both maintain the standard coupler type, 4-SMD package, and RoHS compliance. Both are active products from TTM Technologies, Inc., ensuring ongoing availability and support. Frequency coverage and coupling factor specifications align with or exceed the original 1G1304-30 parameters.

Parameter Comparison

Engineering Selection Recommendations

X3C09P2-30S is the primary substitute for the 1G1304-30. This part maintains identical frequency range coverage (800MHz ~ 1GHz), equivalent coupling factor (30.2dB), and superior performance characteristics including lower insertion loss (0.1dB vs. 0.25dB) and higher power handling (225W vs. 150W). The part is active and fully supported by TTM Technologies, Inc., with RoHS and REACH compliance maintained. The package designation differs (2520 metric vs. 4-SMD, No Lead), requiring mechanical verification for PCB layout compatibility.

X4C09F1-30S serves as an alternative substitute with extended frequency coverage (400MHz ~ 1GHz), providing broader application flexibility. This part maintains the 4-SMD, No Lead package configuration, ensuring direct mechanical compatibility with the original 1G1304-30 footprint. Coupling factor remains at 30dB with improved insertion loss (0.15dB). Power handling is reduced to 100W, which may be limiting for high-power applications. This part is active and fully compliant with RoHS and REACH requirements.

Both substitutes are active products with established supply chains and regulatory compliance, eliminating obsolescence risk associated with the original 1G1304-30.

Frequently Asked Questions (FAQ)

Q: Can X3C09P2-30S directly replace 1G1304-30 on existing PCBs?

A: X3C09P2-30S maintains electrical compatibility within the 800MHz ~ 1GHz band and equivalent coupling characteristics. However, the package designation differs (2520 metric vs. 4-SMD, No Lead). Physical footprint verification is required before PCB integration.

Q: What is the primary advantage of X3C09P2-30S over the original 1G1304-30?

A: X3C09P2-30S provides lower insertion loss (0.1dB vs. 0.25dB) and higher power handling capacity (225W vs. 150W) while maintaining the same frequency range and coupling factor. The part is active and supported by the manufacturer.

Q: When should X4C09F1-30S be selected instead of X3C09P2-30S?

A: X4C09F1-30S is appropriate when the application requires extended frequency coverage below 800MHz (down to 400MHz). The 4-SMD, No Lead package also provides direct mechanical compatibility with the original 1G1304-30 footprint. Power handling is limited to 100W, which may restrict high-power applications.

Q: Are both substitute parts RoHS and REACH compliant?

A: Yes. Both X3C09P2-30S and X4C09F1-30S are RoHS Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: What is the coupling factor tolerance between the original and substitute parts?

A: The original 1G1304-30 specifies 30dB coupling factor. X3C09P2-30S provides 30.2dB, and X4C09F1-30S provides 30dB. The 0.2dB variation in X3C09P2-30S is within acceptable engineering tolerance for RF directional coupler applications.

Q: Is inventory availability a consideration for these substitutes?

A: Both substitute parts are active products with confirmed inventory: X3C09P2-30S has 2967 pcs in stock, and X4C09F1-30S has 4676 pcs in stock, ensuring reliable supply for production and design transitions.