R574493400 RF Switch IC SP4T 18GHz Equivalent & Substitute Parts

Part Overview

The R574493400 is a general-purpose RF switch IC with SP4T (single-pole, four-throw) topology manufactured by Radiall USA, Inc. This component operates across a frequency range of 0Hz to 18GHz with 50-ohm impedance and is designed for RF switching applications requiring high isolation and low insertion loss characteristics.

The R574493400 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this RF switch topology.

Key Parameters

Parameter	Value
Manufacturer Part Number	R574493400
Manufacturer	Radiall USA, Inc.
Circuit Configuration	SP4T
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
RF Type	General Purpose
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the R574493400 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Circuit configuration (SP4T 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)
RF type classification (General Purpose)

Substitute Categories:

Category 1: Direct SP4T Equivalents (Active Status) Parts R573413400 and R573413405 maintain identical electrical specifications to the R574493400, including SP4T topology, frequency range, impedance, isolation, insertion loss, supply voltage, and operating temperature. These parts are classified as active products and represent direct functional equivalents.

Category 2: SP3T Functional Alternatives (Active Status) Parts R573413300, R573413305, R573413310, R573413315, R573413320, R573413330, R573413340, and R573413345 share identical electrical performance parameters with the main part across frequency range, impedance, isolation, insertion loss, supply voltage, and operating temperature. The distinction is circuit configuration: these parts feature SP3T (single-pole, three-throw) topology rather than SP4T. SP3T configuration provides three switch positions instead of four, representing a reduced-throw alternative suitable for applications not requiring four-position switching.

Parameter Comparison

Part Number	Manufacturer	Circuit	Frequency Range	Impedance	Isolation (Min)	Insertion Loss (Max)	Supply Voltage	Operating Temp	Package	Product Status	RoHS Status
R574493400	Radiall USA, Inc.	SP4T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Obsolete	Not Specified
R573413400	Radiall USA, Inc.	SP4T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active	Not Specified
R573413405	Radiall USA, Inc.	SP4T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active	Not Specified
R573413300	Radiall USA, Inc.	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active	Not Specified
R573413305	Radiall USA, Inc.	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active	Not Specified
R573413310	Radiall USA, Inc.	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active	ROHS3 Compliant
R573413315	Radiall USA, Inc.	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active	Not Specified
R573413320	Radiall USA, Inc.	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active	ROHS3 Compliant
R573413330	Radiall USA, Inc.	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active	ROHS3 Compliant
R573413340	Radiall USA, Inc.	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active	ROHS3 Compliant
R573413345	Radiall USA, Inc.	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (SP4T Topology Required):

R573413400 and R573413405 are the appropriate selections when SP4T circuit configuration is mandatory for system operation. Both parts are classified as active products, ensuring ongoing manufacturer support and supply chain availability. These parts maintain complete electrical and mechanical compatibility with the R574493400 across all specified parameters.

For Functional Substitution (SP3T Topology Acceptable):

When application requirements permit operation with three switch positions instead of four, the SP3T alternatives provide equivalent electrical performance. Parts R573413310, R573413320, R573413330, and R573413340 carry ROHS3 compliance certification, which may be required for certain regulatory or procurement specifications. Parts R573413300, R573413305, R573413315, and R573413345 are also available as active products without specified RoHS certification.

All substitute parts maintain identical frequency range, impedance, isolation, insertion loss, supply voltage, and operating temperature specifications relative to the obsolete R574493400, ensuring functional equivalence within their respective circuit topologies.

Frequently Asked Questions (FAQ)

Q: Can R573413400 or R573413405 be used as direct replacements for R574493400?

A: Yes. Both R573413400 and R573413405 are active SP4T RF switch ICs with identical electrical specifications to the R574493400. They share the same frequency range (0Hz ~ 18GHz), impedance (50Ohm), isolation (60dB minimum), insertion loss (0.5dB maximum), supply voltage (24V ~ 30V), operating temperature range (-40°C ~ 85°C), and module package type. The primary distinction is product status: R573413400 and R573413405 are active products, while R574493400 is obsolete.

Q: What is the difference between SP4T and SP3T configurations?

A: SP4T (single-pole, four-throw) provides four switch positions, allowing selection among four distinct signal paths. SP3T (single-pole, three-throw) provides three switch positions. The SP3T alternatives are suitable for applications requiring only three switching positions. All other electrical parameters remain identical between SP4T and SP3T variants.

Q: Are the SP3T parts (R573413300 through R573413345) suitable substitutes if my application only requires three switch positions?

A: Yes. The SP3T parts maintain all electrical performance parameters identical to the R574493400: frequency range, impedance, isolation, insertion loss, supply voltage, and operating temperature. If your circuit design requires only three switch positions, any SP3T variant provides equivalent RF performance. Selection among SP3T options may be based on RoHS compliance requirements or inventory availability.

Q: What is the significance of ROHS3 compliance noted on certain substitute parts?

A: ROHS3 compliance indicates adherence to the Restriction of Hazardous Substances Directive. Parts R573413310, R573413320, R573413330, and R573413340 carry this certification. If your procurement or regulatory requirements mandate RoHS compliance, these four SP3T variants are appropriate selections. Parts without specified RoHS status may still be suitable depending on your specific compliance requirements.

Q: Are all substitute parts available in the same module package as the R574493400?

A: Yes. All substitute parts listed are packaged as modules, matching the R574493400 package type. Mechanical compatibility is maintained across all alternatives.

Q: What supply voltage is required for operation of substitute parts?

A: All substitute parts operate with supply voltage in the range of 24V to 30V, identical to the R574493400. Ensure your power supply design accommodates this voltage specification.

Q: Can I use these substitute parts interchangeably in my existing design?

A: SP4T substitutes (R573413400 and R573413405) are directly interchangeable with R574493400 without circuit modification. SP3T substitutes require circuit design review to confirm that three switch positions satisfy application requirements. All parts maintain identical electrical performance across the specified frequency range and operating conditions.

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