R574402425 RF Switch IC SP4T 18GHz Equivalent & Substitute Parts

Part Overview

The R574402425 is a general-purpose RF switch IC with SP4T (single-pole, four-throw) topology manufactured by Radiall USA, Inc. as part of the RAMSES series. 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 R574402425 carries an obsolete product status. Locating active equivalent and substitute components is necessary to maintain design continuity and ensure ongoing component availability for production and field support applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	R574402425
Manufacturer	Radiall USA, Inc.
Series	RAMSES
Product Status	Obsolete
Circuit Configuration	SP4T
RF Type	General Purpose
Frequency Range	0Hz ~ 18GHz
Impedance	50Ohm
Isolation (Min)	60dB
Insertion Loss (Max)	0.5dB
Test Frequency	18GHz
Voltage Supply	10.2V ~ 13V
Operating Temperature	-40°C ~ 85°C
Package / Case	Module

Substitute Part Grouping Explanation

Substitute parts for the R574402425 are grouped into two categories based on electrical and mechanical parameter compatibility:

Primary Substitute (Direct Replacement): The R574G02425 is classified as the manufacturer-recommended substitute. This part maintains identical electrical specifications including SP4T topology, 50-ohm impedance, 60dB minimum isolation, 0.5dB maximum insertion loss, and identical supply voltage and operating temperature ranges. The R574G02425 differs in product status (Active), packaging (Bulk with SMA Connectors), and moisture sensitivity level (MSL 1 Unlimited). This part provides direct functional equivalence with enhanced availability.

Parametric Equivalents (SP4T Configuration): The R573412400 and R573412405 are parametric equivalents sharing the SP4T circuit configuration. These parts maintain all critical RF performance parameters: 50-ohm impedance, 60dB minimum isolation, 0.5dB maximum insertion loss, identical frequency range, supply voltage, and operating temperature specifications. Both are Active status components in the SPnT series with Module packaging.

Parametric Equivalents (SP3T Configuration): The R573412300, R573412305, R573412320, R573412325, R573412335, and R573412380 are parametric equivalents with SP3T topology. These parts share identical electrical performance specifications (50-ohm impedance, 60dB minimum isolation, 0.5dB maximum insertion loss, frequency range, supply voltage, and operating temperature) but differ in circuit configuration (SP3T versus SP4T). Selection of SP3T variants requires application-level assessment of switching path requirements.

Key Parameters Determining Substitution:

Circuit topology (SP4T or SP3T)
Frequency range capability (0Hz ~ 18GHz)
Impedance (50Ohm)
Isolation performance (60dB minimum)
Insertion loss (0.5dB maximum)
Supply voltage range (10.2V ~ 13V)
Operating temperature range (-40°C ~ 85°C)
Product status (Active preferred over Obsolete)

Parameter Comparison

Parameter	R574402425 (Main)	R574G02425	R573412400	R573412405	R573412420	R573412300	R573412305	R573412320	R573412325	R573412335	R573412380
Manufacturer	Radiall USA, Inc.	Radiall USA, Inc.	Radiall USA, Inc.	Radiall USA, Inc.	Radiall USA, Inc.	Radiall USA, Inc.	Radiall USA, Inc.	Radiall USA, Inc.	Radiall USA, Inc.	Radiall USA, Inc.	Radiall USA, Inc.
Circuit Configuration	SP4T	SP4T	SP4T	SP4T	SP4T	SP3T	SP3T	SP3T	SP3T	SP3T	SP3T
RF Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Frequency Range	0Hz ~ 18GHz	DC ~ 18GHz	0Hz ~ 18GHz	0Hz ~ 18GHz	0Hz ~ 18GHz	0Hz ~ 18GHz	0Hz ~ 18GHz	0Hz ~ 18GHz	0Hz ~ 18GHz	0Hz ~ 18GHz	0Hz ~ 18GHz
Impedance	50Ohm	50Ohm	50Ohm	50Ohm	50Ohm	50Ohm	50Ohm	50Ohm	50Ohm	50Ohm	50Ohm
Isolation (Min)	60dB	60dB	60dB	60dB	60dB	60dB	60dB	60dB	60dB	60dB	60dB
Insertion Loss (Max)	0.5dB	0.5dB	0.5dB	0.5dB	0.5dB	0.5dB	0.5dB	0.5dB	0.5dB	0.5dB	0.5dB
Test Frequency	18GHz	18GHz	18GHz	18GHz	18GHz	18GHz	18GHz	18GHz	18GHz	18GHz	18GHz
Voltage Supply	10.2V ~ 13V	10.2V ~ 13V	10.2V ~ 13V	10.2V ~ 13V	10.2V ~ 13V	10.2V ~ 13V	10.2V ~ 13V	10.2V ~ 13V	10.2V ~ 13V	10.2V ~ 13V	10.2V ~ 13V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	Module	Module, SMA Connectors	Module	Module	Module	Module	Module	Module	Module	Module	Module
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Series	RAMSES	RAMSES	SPnT	SPnT	SPnT	SPnT	SPnT	SPnT	SPnT	SPnT	SPnT
RoHS Status	Not specified	Not specified	Not specified	Not specified	ROHS3 Compliant	Not specified	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	688 Pcs	795 Pcs	694 Pcs	685 Pcs	1186 Pcs	1092 Pcs	867 Pcs	919 Pcs	755 Pcs	734 Pcs	796 Pcs

Engineering Selection Recommendations

For Direct Replacement (SP4T Topology Required):

The R574G02425 is the manufacturer-recommended substitute for the obsolete R574402425. This part maintains complete electrical equivalence across all RF performance parameters while offering Active product status and improved availability. The R574G02425 includes SMA connectors in its module package configuration, which may require mechanical interface assessment in existing designs. This part is suitable for new production and field replacement applications.

For SP4T Topology with Alternative Sourcing:

The R573412400, R573412405, and R573412420 provide SP4T circuit configuration with identical electrical specifications. All three are Active status components with Module packaging. The R573412420 offers the highest inventory level (1186 pieces) and carries ROHS3 compliance certification. These parts are suitable for applications where circuit topology must remain SP4T and alternative sourcing is acceptable.

For SP3T Topology Applications:

The R573412300, R573412305, R573412320, R573412325, R573412335, and R573412380 are SP3T equivalents with identical RF performance parameters. These parts are appropriate only for applications where SP3T switching functionality meets system requirements. Multiple variants within this group offer ROHS3 compliance (R573412320, R573412325, R573412335, R573412380), with R573412300 providing the highest inventory availability (1092 pieces).

Compliance Considerations:

Parts carrying ROHS3 Compliant certification (R573412420, R573412320, R573412325, R573412335, R573412380) are suitable for applications with environmental compliance requirements. Selection should align with end-product regulatory obligations.

Frequently Asked Questions (FAQ)

Q: Can the R574G02425 be used as a direct replacement for the R574402425?

A: Yes. The R574G02425 is the manufacturer-recommended substitute with identical electrical specifications including SP4T topology, 50-ohm impedance, 60dB isolation, 0.5dB insertion loss, frequency range, supply voltage, and operating temperature range. The primary differences are Active product status and SMA connector integration in the module package.

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

A: SP4T (single-pole, four-throw) provides four switching paths from a single input. SP3T (single-pole, three-throw) provides three switching paths from a single input. Selection between these topologies depends on the number of RF signal paths required in the application. SP3T variants cannot substitute for SP4T applications requiring four-path switching capability.

Q: Are all substitute parts compatible with the same supply voltage and temperature range?

A: Yes. All substitute parts listed operate within the identical supply voltage range (10.2V ~ 13V) and operating temperature range (-40°C ~ 85°C) as the original R574402425.

Q: What does ROHS3 compliance indicate?

A: ROHS3 compliance indicates the component meets Restriction of Hazardous Substances Directive requirements. Parts carrying this certification (R573412420, R573412320, R573412325, R573412335, R573412380) are suitable for applications with environmental compliance mandates.

Q: How do the package configurations differ among substitute parts?

A: All substitute parts use Module packaging. The R574G02425 specifically includes SMA connectors as part of its module configuration, while other variants use standard module packaging. Mechanical interface requirements should be assessed based on existing design specifications.

Q: Which substitute part offers the highest inventory availability?

A: The R573412300 (SP3T configuration) offers the highest inventory level at 1092 pieces. For SP4T topology specifically, the R573412420 provides the highest availability at 1186 pieces.

Q: Can frequency range differences affect substitution decisions?

A: The R574G02425 specifies DC ~ 18GHz frequency range, while the original R574402425 and other substitutes specify 0Hz ~ 18GHz. Both specifications cover the same practical operating range for RF switching applications. This difference does not affect functional substitution.

Q: What inventory considerations should guide part selection?

A: Current inventory levels are provided for each substitute part. The R573412420 (SP4T, 1186 pieces) and R573412300 (SP3T, 1092 pieces) offer the highest availability. For applications requiring immediate procurement, these parts provide supply security advantages.

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