RF Attenuator AT-115V 15dB 50 Ohm SMA Equivalent & Substitute Parts

Part Overview

The AT-115V is a 15dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for in-line SMA applications across 0 Hz to 18 GHz with 2W power handling and 50 Ohm impedance. This part is designated as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure continued availability for new designs, maintenance, and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	AT-115V
Manufacturer	Hirose Electric Co Ltd
Attenuation Value	15dB
Frequency Range	0 Hz ~ 18 GHz
Power Rating	2W
Impedance	50 Ohms
Package / Case	SMA In-Line Module
RoHS Status	RoHS Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitute parts for the AT-115V are classified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

Attenuation Value: 15dB (exact match required)
Impedance: 50 Ohms (exact match required)
Package / Case: SMA In-Line Module (exact match required)
Frequency Range: 0 Hz ~ 18 GHz (exact match required for full-range equivalence)
Power Rating: 2W (exact match required for full-range equivalence)

Secondary Consideration:

RoHS Compliance: AT-115V is RoHS Compliant; substitute parts from Cinch Connectivity Solutions are RoHS non-compliant

Substitute parts are sourced from Cinch Connectivity Solutions Midwest Microwave and are grouped into two categories:

Category 1 - Full Electrical Equivalents (15dB, 0 Hz ~ 18 GHz, 2W): Parts meeting all primary substitution criteria with identical electrical performance across the full frequency range and power rating.

Category 2 - Partial Electrical Equivalents (15dB, Limited Frequency Range or Power): Parts with matching attenuation and impedance but reduced frequency range (0 Hz ~ 12.4 GHz or 0 Hz ~ 2 GHz) or unspecified power rating.

Category 3 - Attenuation Variants (16dB): Parts with 16dB attenuation instead of 15dB, suitable only for applications where ±1dB attenuation tolerance is acceptable.

Parameter Comparison

Part Number	Manufacturer	Attenuation	Frequency Range	Power (W)	Impedance	Package	RoHS Status	Product Status
AT-115V	Hirose Electric Co Ltd	15dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	RoHS Compliant	Last Time Buy
M3933/14-05N	Cinch Connectivity Solutions	15dB	0 Hz ~ 12.4 GHz	—	50 Ohms	SMA In-Line Module	RoHS non-compliant	Active
M3933/14-05S	Cinch Connectivity Solutions	15dB	0 Hz ~ 12.4 GHz	—	50 Ohms	SMA In-Line Module	RoHS non-compliant	Active
M3933/14-18N	Cinch Connectivity Solutions	16dB	0 Hz ~ 12.4 GHz	—	50 Ohms	SMA In-Line Module	RoHS non-compliant	Active
M3933/16-36N	Cinch Connectivity Solutions	15dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	RoHS non-compliant	Active
M3933/16-36S	Cinch Connectivity Solutions	15dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	RoHS non-compliant	Active
M3933/16-38N	Cinch Connectivity Solutions	16dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	RoHS non-compliant	Active
M3933/25-15N	Cinch Connectivity Solutions	15dB	0 Hz ~ 2 GHz	2W	50 Ohms	SMA In-Line Module	RoHS non-compliant	Active

Engineering Selection Recommendations

Full Electrical Equivalents (Recommended for Direct Replacement):

M3933/16-36N and M3933/16-36S are the primary substitutes for AT-115V. Both parts match all electrical parameters: 15dB attenuation, 0 Hz ~ 18 GHz frequency range, 2W power rating, and 50 Ohm impedance in SMA In-Line Module packaging. Both are Active status parts with current availability. The difference between -36N and -36S variants relates to packaging configuration (Bag vs. unspecified), not electrical performance.

Compliance Consideration:

AT-115V is RoHS Compliant. All Cinch Connectivity Solutions substitute parts listed are RoHS non-compliant. Applications subject to RoHS requirements must account for this compliance difference during design review and procurement.

Partial Equivalents (Limited Application):

M3933/14-05N and M3933/14-05S provide 15dB attenuation and 50 Ohm impedance but are limited to 0 Hz ~ 12.4 GHz frequency range. These parts are suitable only for applications operating below 12.4 GHz. Power rating is not specified for these parts.

M3933/25-15N provides 15dB attenuation, 2W power rating, and 50 Ohm impedance but is limited to 0 Hz ~ 2 GHz frequency range. This part is suitable only for low-frequency applications below 2 GHz.

Attenuation Variants (Conditional Use):

M3933/14-18N and M3933/16-38N provide 16dB attenuation instead of 15dB. These parts are suitable only for applications where ±1dB attenuation tolerance is acceptable. M3933/16-38N matches the full frequency range (0 Hz ~ 18 GHz) and 2W power rating of AT-115V but with 16dB attenuation.

Frequently Asked Questions (FAQ)

Q: Can M3933/16-36N or M3933/16-36S be used as direct replacements for AT-115V?

A: Yes. Both parts match all critical electrical parameters: 15dB attenuation, 0 Hz ~ 18 GHz frequency range, 2W power rating, 50 Ohm impedance, and SMA In-Line Module packaging. Both are Active status parts with current inventory availability.

Q: What is the difference between M3933/16-36N and M3933/16-36S?

A: The difference is packaging configuration only. Both parts have identical electrical specifications. Selection between -36N and -36S depends on procurement and assembly requirements.

Q: Can M3933/14-05N or M3933/14-05S be used as substitutes?

A: These parts are suitable only for applications operating below 12.4 GHz. They provide 15dB attenuation and 50 Ohm impedance but do not support the full 0 Hz ~ 18 GHz frequency range of AT-115V. Power rating is not specified for these parts.

Q: Why are the Cinch Connectivity Solutions parts RoHS non-compliant while AT-115V is RoHS Compliant?

A: RoHS compliance status is determined by the manufacturing process and materials used by each manufacturer. Applications subject to RoHS requirements must account for this difference during design review and procurement planning.

Q: Can M3933/14-18N or M3933/16-38N be used as substitutes?

A: These parts provide 16dB attenuation instead of 15dB. They are suitable only for applications where ±1dB attenuation tolerance is acceptable. M3933/16-38N matches the full frequency range and 2W power rating of AT-115V.

Q: What is the difference between M3933/25-15N and AT-115V?

A: M3933/25-15N is limited to 0 Hz ~ 2 GHz frequency range, while AT-115V operates across 0 Hz ~ 18 GHz. M3933/25-15N is suitable only for low-frequency applications below 2 GHz.

Q: Are all substitute parts available in the same packaging as AT-115V?

A: All substitute parts use SMA In-Line Module packaging. Specific packaging configurations (Bag, Bulk, or unspecified) vary by part number and should be confirmed during procurement.

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