R574403615 RF Switch IC SP6T 18GHz Equivalent & Substitute Parts

Part Overview

The R574403615 is a general-purpose RF switch IC with SP6T (single-pole, six-throw) topology manufactured by Radiall USA, Inc. This component operates across a frequency range of 0Hz to 18GHz with 50-ohm impedance and is housed in a module package. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components to maintain system functionality and ensure continued availability for new designs and field replacements.

Key Parameters

Parameter	Value
Manufacturer Part Number	R574403615
Manufacturer	Radiall USA, Inc.
Circuit Configuration	SP6T
Frequency Range	0Hz ~ 18GHz
Impedance	50Ohm
Isolation (Minimum)	60dB
Insertion Loss (Maximum)	0.5dB
Test Frequency	18GHz
Supply Voltage	24V ~ 30V
Operating Temperature Range	-40°C ~ 85°C
Package Type	Module
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the R574403615 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Circuit configuration (SP6T topology)
Frequency range capability (0Hz ~ 18GHz minimum)
Impedance matching (50Ohm)
Isolation performance (60dB minimum)
Insertion loss specification (0.5dB maximum)
Supply voltage compatibility (24V ~ 30V)
Operating temperature range (-40°C ~ 85°C)
Package type (Module)

Substitution Categories:

Direct Equivalent (Recommended): R574G03615 maintains identical electrical specifications while offering active product status and enhanced packaging with SMA connectors. This part belongs to the RAMSES series and provides the most direct replacement path.

Parametric Equivalents (SP6T Configuration): R573403600, R573403605, R573403610, R573403610LP, and R573403615 all maintain SP6T topology with identical electrical performance specifications. These parts are active and available in bulk packaging.

Parametric Alternatives (SP5T Configuration): R573403510, R573403515, R573403520, and R573403540 provide SP5T (single-pole, five-throw) topology. These components meet all electrical specifications but differ in circuit configuration by providing one fewer throw position. Selection of SP5T alternatives requires confirmation that the application does not require the sixth throw position.

Parameter Comparison

Part Number	Manufacturer	Circuit	Frequency Range	Impedance	Isolation (Min)	Insertion Loss (Max)	Supply Voltage	Operating Temp	Package	Product Status
R574403615	Radiall USA, Inc.	SP6T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Obsolete
R574G03615	Radiall USA, Inc.	SP6T	DC ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module, SMA Connectors	Active
R573403600	Radiall USA, Inc.	SP6T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573403605	Radiall USA, Inc.	SP6T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573403610	Radiall USA, Inc.	SP6T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573403610LP	Radiall USA, Inc.	SP6T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573403615	Radiall USA, Inc.	SP6T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573403510	Radiall USA, Inc.	SP5T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573403515	Radiall USA, Inc.	SP5T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573403520	Radiall USA, Inc.	SP5T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573403540	Radiall USA, Inc.	SP5T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active

Engineering Selection Recommendations

Primary Recommendation: R574G03615 is the manufacturer-recommended direct equivalent. This part maintains identical electrical specifications to the obsolete R574403615 while offering active product status, ensuring long-term availability and supply chain continuity. The RAMSES series designation and enhanced packaging with SMA connectors provide improved integration options. Moisture sensitivity level of 1 (Unlimited) indicates superior handling characteristics compared to the original part.

Secondary Recommendations (SP6T Topology): R573403600, R573403605, R573403610, R573403610LP, and R573403615 are all active SP6T RF switch ICs with identical electrical performance. These parts are suitable for direct substitution where the original circuit topology must be preserved. Multiple variants provide flexibility in procurement and inventory management. Parts with ROHS3 compliance designation (R573403600, R573403605, R573403610, R573403615) are preferred for applications requiring environmental compliance documentation.

Alternative Consideration (SP5T Topology): R573403510, R573403515, R573403520, and R573403540 provide SP5T configuration with identical electrical specifications except for circuit throw count. These parts are suitable only when the application circuit design can accommodate a five-throw configuration instead of six-throw. ROHS3 compliant variants (R573403520, R573403540) are available for compliance-sensitive applications.

Compliance Status: All recommended substitute parts are active and manufactured by Radiall USA, Inc., ensuring consistent quality and support. Multiple parts carry ROHS3 compliance certification, supporting environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can R574G03615 be used as a direct replacement for R574403615?

A: Yes. R574G03615 is the manufacturer-recommended equivalent with identical electrical specifications (SP6T topology, 0Hz-18GHz frequency range, 50-ohm impedance, 60dB isolation, 0.5dB insertion loss, 24V-30V supply, -40°C to 85°C operating range). The primary difference is active product status and enhanced packaging with SMA connectors. The frequency range specification extends to DC rather than 0Hz, which is functionally equivalent for this application.

Q: What is the difference between SP6T and SP5T configurations?

A: SP6T (single-pole, six-throw) provides six selectable output positions, while SP5T (single-pole, five-throw) provides five selectable output positions. The electrical performance specifications are identical. SP5T parts are suitable only if the application circuit design requires five or fewer throw positions. Verify circuit requirements before selecting SP5T alternatives.

Q: Are all substitute parts available in the same package type?

A: All substitute parts are housed in module packages. R574G03615 includes SMA connectors as part of the module package, providing enhanced integration. Other SP6T equivalents (R573403600, R573403605, R573403610, R573403610LP, R573403615) use standard module packaging. Confirm connector compatibility with your application before selection.

Q: What does ROHS3 compliance indicate?

A: ROHS3 compliance certifies that the component meets Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials. Parts designated as ROHS3 compliant (R573403600, R573403605, R573403610, R573403615 for SP6T; R573403520, R573403540 for SP5T) are suitable for applications requiring environmental compliance documentation.

Q: Why is the original R574403615 marked as obsolete?

A: Product obsolescence indicates that the manufacturer has discontinued production and support. Active equivalent parts are available to ensure continued functionality and supply chain continuity. Transition to an active equivalent part is necessary for new designs and long-term field support.

Q: Are there differences in moisture sensitivity between substitute parts?

A: R574G03615 has a moisture sensitivity level (MSL) of 1 (Unlimited), indicating superior moisture handling characteristics. Most other substitute parts list MSL as Not Applicable. This difference does not affect electrical performance but may influence storage and handling requirements in high-humidity environments.

Q: Can I use multiple substitute parts interchangeably in the same design?

A: All SP6T equivalents (R574G03615, R573403600, R573403605, R573403610, R573403610LP, R573403615) maintain identical electrical specifications and are interchangeable from an electrical standpoint. Physical packaging differences, particularly the SMA connectors on R574G03615, may require circuit board layout verification. SP5T parts are not interchangeable with SP6T parts unless the application circuit is redesigned to accommodate the reduced throw count.

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