RF Attenuator 1dB 50 Ohm SMA M3933/30-03S Equivalent & Substitute Parts

Part Overview

The M3933/30-03S is an RF attenuator manufactured by Amphenol SV Microwave, designed for inline attenuation applications across microwave and RF systems. This component provides 1dB attenuation across a frequency range of 0 Hz to 32 GHz with 50 Ohm impedance and 2W power handling capability in an SMA connector configuration. The part is currently in Active product status with 938 units in stock. Substitute parts are identified when equivalent electrical parameters and mechanical form factors are required due to component availability, supply chain considerations, or design flexibility needs.

Key Parameters

Parameter	Value
Attenuation Value	1dB
Frequency Range	0 Hz ~ 32 GHz
Impedance	50 Ohms
Power Rating	2W
Package Type	SMA In-Line Module
Product Status	Active
RoHS Compliance	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the M3933/30-03S are qualified based on the following critical parameters that must match or exceed the main part specifications:

Mandatory Matching Parameters:

Attenuation Value: 1dB (exact match required)
Impedance: 50 Ohms (exact match required)
Power Rating: 2W (minimum requirement)
Package Type: SMA In-Line Module (exact match required)

Frequency Range Consideration: The M3933/30-03S operates across 0 Hz to 32 GHz. Substitute parts with reduced frequency ranges (0 Hz to 18 GHz) remain functionally equivalent for applications operating within the 18 GHz upper limit, as the attenuator performance at lower frequencies is not compromised by a lower maximum frequency specification.

Compliance Parameters: All substitute parts maintain EAR99 ECCN classification and HTSUS code 8533.21.0090 consistency with the main part.

Parameter Comparison

Parameter	M3933/30-03S (Amphenol SV Microwave)	AT-101V (Hirose Electric)	LCAT1006-01 (L-com)
Attenuation Value	1dB	1dB	1dB
Frequency Range	0 Hz ~ 32 GHz	0 Hz ~ 18 GHz	0 Hz ~ 18 GHz
Impedance	50 Ohms	50 Ohms	50 Ohms
Power Rating	2W	2W	2W
Package Type	SMA In-Line Module	SMA In-Line Module	SMA In-Line Module
Manufacturer	Amphenol SV Microwave	Hirose Electric Co Ltd	L-com
Product Status	Active	Last Time Buy	Active
Packaging	Bag	Bulk	Bag
RoHS Status	ROHS3 Compliant	RoHS Compliant	Not specified in data
Current Inventory	938 Pcs	1011 Pcs	673 Pcs

Engineering Selection Recommendations

Primary Selection (M3933/30-03S): The M3933/30-03S is the recommended primary choice for new designs and applications requiring operation across the full 0 Hz to 32 GHz frequency range. Active product status ensures long-term availability and supply chain stability. ROHS3 compliance meets current environmental regulations.

Secondary Selection (LCAT1006-01): The LCAT1006-01 is suitable for applications with frequency requirements limited to 18 GHz or below. Active product status provides supply continuity. This part is available in Bag packaging matching the main part configuration.

Tertiary Selection (AT-101V): The AT-101V is available as an alternative but carries Last Time Buy status, indicating discontinued production. This part should be selected only when inventory availability is critical and frequency operation is limited to 18 GHz or below. Bulk packaging differs from standard bag configuration.

All three parts maintain identical electrical performance within their respective frequency ranges and are mechanically compatible as direct substitutes in SMA connector applications.

Frequently Asked Questions (FAQ)

Q: Can AT-101V be used as a direct replacement for M3933/30-03S in all applications?

A: AT-101V is electrically equivalent for applications operating at frequencies up to 18 GHz. For applications requiring operation above 18 GHz, AT-101V is not suitable. Additionally, AT-101V carries Last Time Buy status, limiting future availability.

Q: What is the significance of the frequency range difference between M3933/30-03S (32 GHz) and the substitute parts (18 GHz)?

A: The frequency range specification indicates the maximum operating frequency. Substitute parts with 18 GHz maximum frequency are fully functional at all frequencies below 18 GHz. Selection depends on the application's actual frequency requirements, not the maximum specification.

Q: Are there packaging differences between the substitute parts?

A: Yes. M3933/30-03S and LCAT1006-01 are supplied in Bag packaging. AT-101V is supplied in Bulk packaging. Packaging selection may affect handling, storage, and integration into manufacturing processes.

Q: Do all substitute parts meet RoHS compliance requirements?

A: M3933/30-03S is ROHS3 compliant. AT-101V is RoHS compliant. LCAT1006-01 RoHS status is not specified in the provided data. Verify LCAT1006-01 compliance requirements with the manufacturer if RoHS certification is mandatory for your application.

Q: What is the impact of Last Time Buy status on AT-101V?

A: Last Time Buy status indicates the manufacturer has discontinued production. Existing inventory may be available, but future replenishment is not guaranteed. For long-term production requirements, AT-101V should not be selected as a primary component.

Q: Are all three parts mechanically interchangeable?

A: Yes. All three parts use SMA In-Line Module packaging and are mechanically interchangeable in connector applications. Electrical performance is identical within the specified frequency ranges of each part.

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