CT3369A-03 RF Attenuator Equivalent & Substitute Parts

Part Overview

The CT3369A-03 is a 3dB RF attenuator module manufactured by Cal Test Electronics, designed for inline attenuation applications across 0 Hz to 4 GHz frequency range. This component operates at 2W power handling capacity with 50 Ohm impedance and BNC connectors. The part maintains Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters are required for procurement flexibility, inventory management, or supply chain continuity.

Substiute Parts

CT3369A-03

Cal Test ElectronicsIn Stock: 955CT3369A-03 Datasheet

Current PartRFQ

PE7437-3

PasternackIn Stock: 781PE7437-3 Datasheet

Parametric EquivalentRFQ

PE7438-3

PasternackIn Stock: 1008PE7438-3 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CT3369A-03 are qualified based on matching the following critical parameters: attenuation value (3dB), frequency range (0 Hz ~ 4 GHz), power handling (2W), package type (BNC In-Line Module), and active product status. The impedance specification is the primary differentiator among available substitutes. PE7437-3 maintains full parameter equivalence at 50 Ohms impedance. PE7438-3 shares all parameters except impedance, which is specified at 75 Ohms, and is therefore suitable only for systems designed for 75 Ohm characteristic impedance.

Parameter Comparison

Engineering Selection Recommendations

PE7437-3 is the direct parametric equivalent to CT3369A-03, matching all electrical and mechanical specifications including 50 Ohm impedance. Both parts maintain Active product status and comply with RoHS and REACH requirements. PE7438-3 is functionally equivalent in all parameters except impedance specification (75 Ohms versus 50 Ohms) and is suitable only for 75 Ohm system applications. Selection between CT3369A-03 and PE7437-3 depends on procurement availability and supply chain requirements, as both parts are electrically and mechanically interchangeable for 50 Ohm RF systems.

Frequently Asked Questions (FAQ)

Q: Can PE7438-3 be used as a substitute for CT3369A-03? A: PE7438-3 is not suitable as a direct substitute. While it matches attenuation, frequency range, power rating, and package specifications, it is specified for 75 Ohm impedance systems, whereas CT3369A-03 is designed for 50 Ohm systems. Using a 75 Ohm attenuator in a 50 Ohm system will result in impedance mismatch and signal reflection.

Q: What is the primary difference between PE7437-3 and PE7438-3? A: The primary difference is impedance specification. PE7437-3 is rated for 50 Ohm systems, matching the CT3369A-03 specification. PE7438-3 is rated for 75 Ohm systems. All other electrical parameters (attenuation, frequency range, power handling) and mechanical specifications (BNC In-Line Module package) are identical.

Q: Are all three parts RoHS compliant? A: Yes. CT3369A-03 is RoHS3 compliant. PE7437-3 and PE7438-3 are RoHS compliant. All three parts meet RoHS requirements and are REACH unaffected.

Q: What is the inventory status of these parts? A: CT3369A-03 has 944 pieces in stock. PE7437-3 has 732 pieces in stock. PE7438-3 has 996 pieces in stock. All parts are listed as new original stock.

Q: Can these attenuators be used interchangeably in any RF application? A: No. Impedance matching is critical in RF systems. CT3369A-03 and PE7437-3 are interchangeable only in 50 Ohm systems. PE7438-3 is interchangeable only in 75 Ohm systems. Impedance mismatch will degrade system performance.