R412403000 RF Attenuator BNC 3dB 2GHz 2W 50 Ohms Equivalent & Substitute Parts

Part Overview

The R412403000 is an RF attenuator manufactured by Radiall USA, Inc., designed for in-line attenuation applications in RF and microwave systems. This BNC-connectorized module provides 3dB attenuation across a frequency range of 0 Hz to 2 GHz with 50-ohm impedance matching and 2-watt power handling capability. The component is classified as Active product status and maintains ROHS3 compliance. Substitute parts are identified when the original part becomes unavailable, when inventory constraints exist, or when system requirements permit operation within an extended frequency range while maintaining core electrical specifications.

Substiute Parts

R412403000

Radiall USA, Inc.In Stock: 895R412403000 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

Substitution eligibility for the R412403000 is determined by matching the following critical parameters: attenuation value (3dB), power handling (2W), package type (BNC In-Line Module), and impedance specification (50 Ohms). The frequency range of the original part (0 Hz ~ 2 GHz) establishes the minimum operational bandwidth requirement. Substitute parts must maintain identical attenuation and power specifications while supporting the original frequency range as a subset of their operational bandwidth. Impedance matching is mandatory for RF circuit compatibility; parts with different impedance values do not qualify as direct substitutes despite matching other parameters.

Parameter Comparison

Engineering Selection Recommendations

PE7437-3 (Pasternack) qualifies as a direct parametric equivalent to R412403000. Both parts share identical attenuation (3dB), power rating (2W), impedance (50 Ohms), and package configuration (BNC In-Line Module). The PE7437-3 extends the frequency range to 4 GHz, which encompasses the original 2 GHz specification. Both parts maintain active product status and RoHS compliance certifications.

PE7438-3 (Pasternack) does not qualify as a substitute for R412403000 due to impedance mismatch. Although PE7438-3 matches attenuation, power, package type, and frequency range parameters, its 75-ohm impedance differs from the required 50-ohm specification. Impedance incompatibility prevents direct substitution in 50-ohm RF systems.

Frequently Asked Questions (FAQ)

Q: Can PE7437-3 replace R412403000 in existing circuit designs?

A: Yes. PE7437-3 maintains all critical electrical parameters: 3dB attenuation, 2W power handling, 50-ohm impedance, and BNC in-line package configuration. The extended frequency range (4 GHz versus 2 GHz) does not create incompatibility; the part operates within the original specification band while providing additional bandwidth capability.

Q: Why is PE7438-3 listed but not recommended as a substitute?

A: PE7438-3 is listed in the original substitute reference but does not meet substitution criteria due to 75-ohm impedance specification. The R412403000 requires 50-ohm impedance matching. Using a 75-ohm attenuator in a 50-ohm system introduces impedance discontinuities that degrade signal integrity and create reflections.

Q: Are there packaging or connector differences between R412403000 and PE7437-3?

A: No. Both parts use identical BNC in-line module packaging and connector configuration, enabling direct mechanical and electrical integration without adapter requirements.

Q: What compliance certifications apply to substitute selection?

A: Both R412403000 and PE7437-3 maintain RoHS compliance status and active product status, confirming regulatory alignment and ongoing manufacturer support. ECCN classification (EAR99) is consistent across both parts.

Q: Does the frequency range extension in PE7437-3 affect attenuation performance in the 0 Hz to 2 GHz band?

A: Attenuation performance is specified at 3dB across the operational bandwidth. PE7437-3 maintains 3dB attenuation throughout its 0 Hz to 4 GHz range, including the original 0 Hz to 2 GHz specification band.