AT-103V RF Attenuator 3dB 50 Ohm SMA Equivalent & Substitute Parts

Part Overview

The AT-103V is a 3dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for in-line SMA applications across 0 Hz to 18 GHz frequency range with 2W power handling and 50 Ohm impedance. This component is classified as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this performance specification.

Key Parameters

Parameter	Value
Manufacturer Part Number	AT-103V
Manufacturer	Hirose Electric Co Ltd
Attenuation Value	3dB
Frequency Range	0 Hz ~ 18 GHz
Power Rating	2W
Impedance	50 Ohms
Package / Case	SMA In-Line Module
Product Status	Last Time Buy
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the AT-103V are classified based on strict adherence to the following critical parameters:

Primary Substitution Criteria (Must Match):

Attenuation Value: 3dB
Impedance: 50 Ohms
Package / Case: SMA In-Line Module
Power Rating: 2W

Secondary Consideration (Frequency Range): Substitute parts are grouped by frequency range capability. The AT-103V operates across 0 Hz ~ 18 GHz. Substitutes with identical or broader frequency coverage are direct equivalents. Substitutes with narrower frequency ranges are conditional equivalents, suitable only for applications operating within their specified frequency limits.

Compliance Considerations: RoHS and REACH compliance status are documented for each substitute to support regulatory requirements in specific markets and applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Attenuation (dB)	Frequency Range (GHz)	Power (W)	Impedance (Ω)	Package	Product Status	RoHS Status
AT-103V	Hirose Electric Co Ltd	3	0 ~ 18	2	50	SMA In-Line Module	Last Time Buy	ROHS3 Compliant
32AS102-K03S3	Rosenberger	3	0 ~ 18	2	50	SMA In-Line Module	Active	RoHS Compliant
M3933/16-01S	Cinch Connectivity Solutions Midwest Microwave	3	0 ~ 18	2	50	SMA In-Line Module	Active	RoHS non-compliant
M3933/25-03N	Cinch Connectivity Solutions Midwest Microwave	3	0 ~ 2	2	50	SMA In-Line Module	Active	RoHS non-compliant
M3933/25-03S	Cinch Connectivity Solutions Midwest Microwave	3	0 ~ 2	2	50	SMA In-Line Module	Active	RoHS non-compliant
M3933/25-29N	Cinch Connectivity Solutions Midwest Microwave	3	0 ~ 12.4	2	50	SMA In-Line Module	Active	RoHS non-compliant
M3933/25-29S	Cinch Connectivity Solutions Midwest Microwave	3	0 ~ 12.4	2	50	SMA In-Line Module	Active	RoHS non-compliant
M3933/25-64S	Cinch Connectivity Solutions Midwest Microwave	3	0 ~ 18	2	50	SMA In-Line Module	Active	RoHS non-compliant

Engineering Selection Recommendations

Full-Range Equivalents (0 ~ 18 GHz): The 32AS102-K03S3 (Rosenberger) and M3933/16-01S and M3933/25-64S (Cinch Connectivity Solutions Midwest Microwave) provide complete parametric equivalence to the AT-103V across the full 18 GHz frequency range. The 32AS102-K03S3 maintains active product status and RoHS compliance, supporting modern supply chain and regulatory requirements. The M3933/16-01S and M3933/25-64S are active products but carry RoHS non-compliance status.

Frequency-Limited Equivalents: The M3933/25-03N and M3933/25-03S variants operate within 0 ~ 2 GHz, suitable only for applications constrained to this frequency band. The M3933/25-29N and M3933/25-29S variants extend to 0 ~ 12.4 GHz, appropriate for mid-range frequency applications. These parts are active products but do not meet RoHS compliance requirements.

Compliance Considerations: Applications requiring ROHS3 compliance should prioritize the 32AS102-K03S3. Applications in markets or programs with RoHS non-compliance acceptance may utilize Cinch Connectivity Solutions Midwest Microwave variants. All listed substitutes carry REACH Affected status consistent with the AT-103V.

Frequently Asked Questions (FAQ)

Q: Can M3933/25-03N or M3933/25-03S be used as direct replacements for AT-103V? A: These parts are parametric equivalents only within their 0 ~ 2 GHz frequency range. They are not suitable for applications requiring the full 0 ~ 18 GHz performance of the AT-103V.

Q: What is the primary difference between 32AS102-K03S3 and M3933/16-01S? A: Both provide full 0 ~ 18 GHz frequency coverage with identical electrical specifications. The 32AS102-K03S3 is RoHS compliant and maintains active product status. The M3933/16-01S is RoHS non-compliant. Selection depends on regulatory and compliance requirements.

Q: Are there inventory differences between substitute options? A: Yes. Current inventory levels vary: 32AS102-K03S3 (863 pcs), M3933/16-01S (990 pcs), M3933/25-64S (635 pcs), and M3933/25-29S (819 pcs). Availability should be confirmed with suppliers for production requirements.

Q: What packaging formats are available for substitutes? A: All substitutes are supplied in SMA In-Line Module format. The AT-103V is supplied in Bulk packaging, while Cinch Connectivity Solutions Midwest Microwave variants are supplied in Bag packaging. Rosenberger 32AS102-K03S3 packaging is not specified in available data.

Q: Can M3933/25-29N or M3933/25-29S replace AT-103V in all applications? A: These parts are suitable only for applications operating within 0 ~ 12.4 GHz. They are not appropriate for systems requiring full 18 GHz coverage.

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