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

Part Overview

The M3933/30-03N 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 1023 units in stock. Substitute parts are identified when equivalent electrical parameters and mechanical interfaces are available from alternative manufacturers, enabling procurement flexibility and supply chain continuity.

Substiute Parts

M3933/30-03N

Amphenol SV MicrowaveIn Stock: 1122M3933/30-03N Datasheet

Current PartRFQ

AT-101V

Hirose Electric Co LtdIn Stock: 1056AT-101V Datasheet

Parametric EquivalentRFQ

LCAT1006-01

L-comIn Stock: 726LCAT1006-01 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the M3933/30-03N are qualified based on the following critical parameters that determine functional interchangeability:

Primary Substitution Criteria:

• Attenuation Value: 1dB (exact match required)
• Impedance: 50 Ohms (exact match required)
• Power Rating: 2W (exact match required)
• Package / Case: SMA In-Line Module (exact match required)

Secondary Consideration:

• Frequency Range: The M3933/30-03N operates 0 Hz ~ 32 GHz. Substitute parts with reduced frequency ranges (0 Hz ~ 18 GHz) are qualified for applications operating within their specified frequency limits.

Two substitute parts meet these criteria: AT-101V (Hirose Electric Co Ltd) and LCAT1006-01 (L-com). Both provide identical attenuation, impedance, and power handling in the same SMA in-line module package. The frequency range difference reflects design variations between manufacturers but does not affect substitution validity for applications within the 0 Hz ~ 18 GHz operating window.

Parameter Comparison

Engineering Selection Recommendations

M3933/30-03N (Primary Selection): Select this part for applications requiring operation across the full 0 Hz to 32 GHz frequency range. The component maintains Active product status, ensuring long-term availability and supply stability. ROHS3 compliance satisfies stringent environmental and regulatory requirements. Highest current inventory (1023 units) supports immediate procurement needs.

AT-101V (Conditional Substitute): This part qualifies as a substitute for applications operating within 0 Hz to 18 GHz frequency limits. The component carries Last Time Buy status, indicating discontinued production with limited future availability. RoHS compliance is confirmed. Use this substitute only when frequency requirements do not exceed 18 GHz and when long-term supply is not critical. Bulk packaging may require internal repackaging for controlled inventory management.

LCAT1006-01 (Conditional Substitute): This part qualifies as a substitute for applications operating within 0 Hz to 18 GHz frequency limits. The component maintains Active product status, supporting ongoing availability. RoHS compliance status is not specified in available documentation. Use this substitute when frequency requirements do not exceed 18 GHz and when Active product status is required. Bag packaging aligns with standard component handling procedures.

Frequently Asked Questions (FAQ)

Q: Can AT-101V or LCAT1006-01 be used in place of M3933/30-03N in all applications?

A: No. Both substitute parts operate only to 18 GHz, compared to the M3933/30-03N specification of 32 GHz. Substitution is valid only for applications with maximum operating frequencies at or below 18 GHz. Applications requiring operation above 18 GHz must use the M3933/30-03N.

Q: What is the significance of AT-101V being listed as "Last Time Buy"?

A: Last Time Buy status indicates that Hirose Electric Co Ltd has discontinued production of this part. Existing inventory will be depleted without replenishment. While currently available (1011 units in stock), this part should not be selected for new designs or long-term production requirements. Use only when immediate availability is critical and frequency requirements are within 18 GHz limits.

Q: Are there packaging differences between these parts?

A: Yes. M3933/30-03N and LCAT1006-01 are supplied in Bag packaging, while AT-101V is supplied in Bulk packaging. Bag packaging typically includes individual component packaging suitable for controlled inventory and traceability. Bulk packaging requires internal sorting and repackaging. Select based on your inventory management and traceability requirements.

Q: What is the difference between ROHS3 and RoHS compliance?

A: ROHS3 represents the most current RoHS directive implementation with the most stringent restrictions on hazardous substances. RoHS Compliant indicates adherence to earlier RoHS standards. Both designations confirm environmental compliance, but ROHS3 represents the higher standard. M3933/30-03N meets ROHS3 requirements; AT-101V meets RoHS requirements; LCAT1006-01 compliance level is not specified.

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

A: Interchangeability is limited to the mechanical interface (SMA In-Line Module) and electrical parameters (1dB attenuation, 50 Ohm impedance, 2W power). Frequency range differences must be evaluated against your specific application requirements. If your design operates exclusively within 0 Hz to 18 GHz, AT-101V and LCAT1006-01 are mechanically and electrically interchangeable with M3933/30-03N.

Q: Which substitute part should be selected for new product designs?

A: LCAT1006-01 is the preferred substitute for new designs requiring operation within 0 Hz to 18 GHz. This part maintains Active product status, ensuring continued availability and supply chain stability. AT-101V should be avoided for new designs due to Last Time Buy status. For applications requiring operation above 18 GHz, the M3933/30-03N remains the only qualified option.