RF Attenuator 20dB 50 Ohm SMA M3933/16-04S Equivalent & Substitute Parts

Part Overview

The M3933/16-04S is an RF attenuator manufactured by Amphenol SV Microwave, designed for RF signal attenuation applications requiring 20dB reduction across a broad frequency range. This in-line module operates from DC to 18 GHz with 50 Ohm impedance and 2W power handling capability, utilizing SMA connectors for direct integration into RF systems.

The product maintains Active status with 923 units currently in stock. Equivalent and substitute parts are identified based on matching electrical specifications: 20dB attenuation value, 50 Ohm impedance, 2W power rating, and SMA in-line module packaging. Substitute parts may differ in frequency range limitations or product lifecycle status, requiring engineering evaluation for specific application requirements.

Substiute Parts

M3933/16-04S

Amphenol SV MicrowaveIn Stock: 987M3933/16-04S Datasheet

Current PartRFQ

AT-120V

Hirose Electric Co LtdIn Stock: 775AT-120V Datasheet

Parametric EquivalentRFQ

LCAT1001-20

L-comIn Stock: 1109LCAT1001-20 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the M3933/16-04S is determined by the following mandatory parameters:

Primary Matching Criteria:

• Attenuation Value: 20dB (exact match required)
• Impedance: 50 Ohms (exact match required)
• Power Rating: 2W (exact match required)
• Package Type: SMA In-Line Module (exact match required)

Secondary Considerations:

• Frequency Range: The main part operates 0 Hz ~ 18 GHz. Substitute parts with reduced frequency ranges (0 Hz ~ 3 GHz) remain electrically compatible for applications operating within their specified bandwidth but are not suitable for applications requiring full 18 GHz coverage.
• Product Status: Active status indicates ongoing availability; Last Time Buy status indicates limited future availability.
• RoHS Compliance: All identified substitutes maintain ROHS3 compliance, meeting environmental regulatory requirements.

Two substitute parts meet the primary electrical and mechanical matching criteria: AT-120V (Hirose Electric Co Ltd) and LCAT1001-20 (L-com).

Parameter Comparison

Engineering Selection Recommendations

AT-120V (Hirose Electric Co Ltd): This substitute provides full electrical and mechanical equivalence to the M3933/16-04S across all primary matching criteria, including identical frequency range coverage (0 Hz ~ 18 GHz). However, AT-120V carries Last Time Buy product status, indicating this part will reach end-of-life. Selection of AT-120V is appropriate only for applications with defined, limited production runs or where existing supply chain qualification exists. For new designs or long-term production requirements, AT-120V introduces supply continuity risk.

LCAT1001-20 (L-com): This substitute matches all primary electrical and mechanical specifications (20dB attenuation, 50 Ohm impedance, 2W power, SMA in-line module) and maintains Active product status with the highest available inventory (1069 units). The frequency range limitation (0 Hz ~ 3 GHz versus 0 Hz ~ 18 GHz) restricts application scope to systems operating within 3 GHz maximum frequency. LCAT1001-20 is suitable for DC to 3 GHz applications requiring 20dB attenuation and provides superior supply continuity compared to Last Time Buy alternatives.

Both substitutes maintain ROHS3 compliance and EAR99 export classification, meeting regulatory and compliance requirements equivalent to the main part.

Frequently Asked Questions (FAQ)

Q: Can AT-120V be used as a direct replacement for M3933/16-04S in all applications?

A: AT-120V provides electrical and mechanical equivalence across all primary specifications. However, AT-120V carries Last Time Buy status, meaning future availability is limited. For applications with ongoing production requirements beyond current inventory depletion timelines, AT-120V introduces supply risk. Verify procurement lead times and end-of-life dates with the supplier before committing to AT-120V for new designs.

Q: What is the key limitation of LCAT1001-20 compared to M3933/16-04S?

A: LCAT1001-20 operates across 0 Hz ~ 3 GHz frequency range, whereas M3933/16-04S covers 0 Hz ~ 18 GHz. Both provide identical 20dB attenuation, 50 Ohm impedance, and 2W power handling. LCAT1001-20 is suitable only for applications operating at frequencies up to 3 GHz. Applications requiring attenuation above 3 GHz must use M3933/16-04S or AT-120V.

Q: Are all three parts RoHS compliant?

A: Yes. M3933/16-04S, AT-120V, and LCAT1001-20 all maintain ROHS3 compliance, meeting environmental and regulatory requirements for restricted substance use.

Q: What packaging differences exist between these parts?

A: M3933/16-04S is supplied in Bag packaging. AT-120V is supplied in Bulk packaging. LCAT1001-20 is supplied in Bag packaging. All three use identical SMA in-line module mechanical form factor. Packaging differences affect only order quantities and handling; electrical and mechanical compatibility remains unchanged.

Q: Which substitute offers the best supply continuity?

A: LCAT1001-20 offers superior supply continuity, maintaining Active product status with 1069 units in inventory. AT-120V, despite adequate current stock (747 units), carries Last Time Buy status indicating limited future availability. For applications requiring long-term supply assurance, LCAT1001-20 is the preferred substitute within its 3 GHz frequency limitation.

Q: Can these parts be used interchangeably in existing designs?

A: Interchangeability depends on application frequency requirements. For applications operating 0 Hz ~ 3 GHz, all three parts are interchangeable. For applications requiring operation above 3 GHz, only M3933/16-04S and AT-120V are suitable. Verify your application's maximum operating frequency before selecting a substitute.