R574493420 RF Switch IC SP4T 18GHz Equivalent & Substitute Parts

Part Overview

The R574493420 is a general-purpose RF switch integrated circuit 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 R574493420 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	R574493420
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 eligibility for the R574493420 is determined by the following critical parameters:

Primary Substitution Criteria:

Circuit configuration (SP4T or SP3T 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)
Manufacturer (Radiall USA, Inc.)

Substitution Categories:

Category 1: Direct SP4T Equivalents (Active Status) Parts R573413400 and R573413405 maintain identical circuit topology (SP4T) with all electrical parameters matching the original specification. These components are classified as active products, ensuring ongoing availability and support.

Category 2: Functional Alternatives (SP3T Configuration) Parts R573413300, R573413305, R573413310, R573413315, R573413320, R573413330, R573413340, and R573413345 operate with SP3T topology, reducing the number of throw positions from four to three. These parts maintain electrical performance parity across frequency range, impedance, isolation, insertion loss, supply voltage, and operating temperature specifications. All SP3T alternatives carry active product status.

Parameter Comparison

Part Number	Circuit	Frequency Range	Impedance	Isolation (Min)	Insertion Loss (Max)	Supply Voltage	Operating Temp	Product Status	RoHS3 Compliant
R574493420	SP4T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Obsolete	Not Specified
R573413400	SP4T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Active	Not Specified
R573413405	SP4T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Active	Not Specified
R573413300	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Active	Not Specified
R573413305	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Active	Not Specified
R573413310	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Active	ROHS3 Compliant
R573413315	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Active	Not Specified
R573413320	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Active	ROHS3 Compliant
R573413330	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Active	ROHS3 Compliant
R573413340	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Active	ROHS3 Compliant
R573413345	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Topology Replacement (SP4T to SP4T):

Parts R573413400 and R573413405 provide direct functional equivalence to the R574493420. Both components maintain SP4T circuit configuration with identical electrical specifications across all critical parameters. Selection between these two active alternatives should be based on inventory availability and procurement lead times. Both parts are manufactured by Radiall USA, Inc., ensuring design continuity and compatibility with existing circuit implementations.

For Functional Alternative Selection (SP4T to SP3T):

The SP3T alternatives (R573413300, R573413305, R573413310, R573413315, R573413320, R573413330, R573413340, R573413345) are suitable for applications where the reduced throw count does not compromise system functionality. These parts deliver equivalent electrical performance in frequency range, impedance, isolation, and insertion loss specifications. All SP3T alternatives carry active product status, ensuring long-term supply chain support.

Among the SP3T options, parts R573413310, R573413320, R573413330, and R573413345 carry ROHS3 compliance certification, which may be required for applications subject to environmental or regulatory restrictions.

Inventory Considerations:

Current inventory levels across all substitute parts range from 689 to 1068 units, indicating stable availability. The original R574493420 maintains 981 units in stock despite its obsolete classification.

Frequently Asked Questions (FAQ)

Q: Can R573413400 or R573413405 be used as direct replacements for R574493420?

A: Yes. Both R573413400 and R573413405 maintain identical SP4T circuit topology and electrical specifications including frequency range (0Hz ~ 18GHz), impedance (50Ohm), isolation (60dB minimum), insertion loss (0.5dB maximum), supply voltage (24V ~ 30V), and operating temperature range (-40°C ~ 85°C). Both are active products manufactured by Radiall USA, Inc.

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

A: SP4T (single-pole, four-throw) provides four selectable output paths from a single input. SP3T (single-pole, three-throw) provides three selectable output paths. The SP3T alternatives are suitable for applications requiring only three switching positions. All other electrical parameters remain equivalent.

Q: Are the SP3T alternatives electrically compatible with the original SP4T design?

A: SP3T alternatives maintain electrical parity across frequency range, impedance, isolation, insertion loss, supply voltage, and operating temperature specifications. Compatibility depends on whether the application circuit requires all four throw positions. If the design uses only three of the four available paths, SP3T alternatives provide full functional equivalence.

Q: Which substitute parts carry ROHS3 compliance?

A: Parts R573413310, R573413320, R573413330, and R573413345 are certified ROHS3 compliant. These parts are suitable for applications subject to environmental or regulatory requirements mandating ROHS3 compliance.

Q: What is the difference between the multiple SP3T part numbers?

A: All SP3T alternatives (R573413300, R573413305, R573413310, R573413315, R573413320, R573413330, R573413340, R573413345) maintain identical electrical specifications. Differences are internal design variations within the SP3T topology. Selection should be based on inventory availability, ROHS3 compliance requirements, and procurement lead times.

Q: Is the R574493420 still available for purchase?

A: The R574493420 is classified as obsolete but maintains current inventory of 981 units. However, active product alternatives (R573413400, R573413405, and the SP3T series) are recommended for new designs and ongoing production to ensure long-term supply chain continuity.

Q: Can multiple SP3T parts be combined to achieve SP4T functionality?

A: No. Each part operates as an independent switching module. Combining multiple SP3T parts would require additional circuit design modifications and is not a direct substitution approach.

Q: What packaging format do all substitute parts use?

A: All substitute parts use Module packaging, matching the original R574493420 package type.

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