CT4458-30 SMA RF Attenuator Equivalent & Substitute Parts

Part Overview

The CT4458-30 is a fixed RF attenuator manufactured by Cal Test Electronics, designed for in-line attenuation applications in RF and microwave systems. This SMA-connectorized module provides 30dB attenuation across a 0 Hz to 18 GHz frequency range with 50-ohm impedance and 2-watt power handling capability. The part is currently active in production status with ROHS3 compliance and REACH unaffected classification. Substitute parts are identified when equivalent electrical and mechanical parameters are required for system integration, inventory management, or component availability.

Substiute Parts

CT4458-30

Cal Test ElectronicsIn Stock: 888CT4458-30 Datasheet

Current PartRFQ

P1AT-SAMF-18G2W-30

P1dB IncIn Stock: 934P1AT-SAMF-18G2W-30 Datasheet

Parametric EquivalentRFQ

SA18E-30

Fairview MicrowaveIn Stock: 1120SA18E-30 Datasheet

Parametric EquivalentRFQ

SA6HA-30

Fairview MicrowaveIn Stock: 1134SA6HA-30 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CT4458-30 are qualified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Critical Parameters (Must Match Exactly):

• Attenuation Value: 30dB
• Impedance: 50 Ohms
• Power Rating: 2W
• Package Type: SMA In-Line Module
• Connector Configuration: Male-Female

Frequency Range Consideration: Substitute parts are grouped into two categories based on frequency range specifications. Parts P1AT-SAMF-18G2W-30 and SA18E-30 maintain full 0 Hz ~ 18 GHz coverage matching the CT4458-30. Part SA6HA-30 operates within a reduced frequency range of 0 Hz ~ 6 GHz and is suitable only for applications not requiring operation above 6 GHz.

Compliance Parameters: All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original part.

Parameter Comparison

Engineering Selection Recommendations

Full-Range Substitutes (0 Hz ~ 18 GHz): Parts P1AT-SAMF-18G2W-30 and SA18E-30 are direct parametric equivalents to CT4458-30, maintaining identical frequency range coverage. Both parts are active in production status with ROHS3 compliance and REACH unaffected classification. Selection between these parts and the original CT4458-30 depends on supply chain requirements and inventory availability.

Limited-Range Substitute (0 Hz ~ 6 GHz): Part SA6HA-30 is a parametric equivalent only for applications operating within the 0 Hz to 6 GHz frequency range. This part is not suitable for systems requiring operation above 6 GHz. Use of SA6HA-30 is restricted to applications with confirmed frequency requirements below 6 GHz.

Compliance and Production Status: All substitute parts maintain active production status and ROHS3 compliance, ensuring long-term availability and regulatory alignment with the original CT4458-30.

Frequently Asked Questions (FAQ)

Q: Can SA6HA-30 be used as a direct replacement for CT4458-30? A: SA6HA-30 is a parametric equivalent only for applications operating within 0 Hz to 6 GHz. It is not suitable for systems requiring operation above 6 GHz. Verify application frequency requirements before substitution.

Q: What are the critical parameters that determine substitutability? A: Attenuation value (30dB), impedance (50 Ohms), power rating (2W), package type (SMA In-Line Module), and connector configuration (Male-Female) must match exactly. Frequency range must meet or exceed application requirements.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed (P1AT-SAMF-18G2W-30, SA18E-30, and SA6HA-30) are ROHS3 compliant and REACH unaffected, matching the regulatory status of CT4458-30.

Q: What is the difference between P1AT-SAMF-18G2W-30 and SA18E-30? A: Both parts are parametric equivalents with identical electrical specifications (30dB, 0 Hz ~ 18 GHz, 50 Ohms, 2W, SMA In-Line Module). The difference is manufacturer: P1dB Inc versus Fairview Microwave. Selection depends on supply chain and procurement requirements.

Q: Can these parts be used interchangeably in existing designs? A: Yes, for full-range substitutes (P1AT-SAMF-18G2W-30 and SA18E-30). Both maintain identical electrical and mechanical parameters. SA6HA-30 is interchangeable only in applications confirmed to operate within 0 Hz to 6 GHz.

Q: What packaging format is used for all these parts? A: All parts use SMA In-Line Module packaging with Male-Female connector configuration, ensuring mechanical compatibility in standard RF system installations.