RF Attenuator AT-113V Equivalent & Substitute Parts

Part Overview

The AT-113V is a 13dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for 50-ohm impedance applications across 0 Hz to 18 GHz frequency range with 2W power handling capability in SMA in-line module configuration. The part is currently in Last Time Buy status, indicating production discontinuation. Equivalent and substitute parts are necessary to ensure continued availability and supply chain continuity for applications requiring 13dB attenuation at 50 ohms with full 18 GHz bandwidth and 2W power rating.

Key Parameters

Parameter	AT-113V Specification
Attenuation Value	13dB
Frequency Range	0 Hz ~ 18 GHz
Impedance	50 Ohms
Power Rating	2W
Package / Case	SMA In-Line Module
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AT-113V is determined by the following critical parameters:

Primary Matching Criteria (Mandatory for Direct Substitution):

Attenuation Value: 13dB
Impedance: 50 Ohms
Package / Case: SMA In-Line Module
Frequency Range: 0 Hz ~ 18 GHz (full bandwidth coverage)
Power Rating: 2W

Secondary Consideration:

RoHS compliance status is noted but does not prevent substitution in non-regulated applications

Parts meeting all primary criteria are classified as direct parametric equivalents. Parts with attenuation values of 14dB or reduced frequency range (0 Hz ~ 12.4 GHz) are listed as parametric alternatives with noted deviations.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Attenuation	Frequency Range	Power (W)	Impedance	Package	RoHS Status	Inventory (Pcs)
AT-113V	Hirose Electric Co Ltd	13dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	RoHS Compliant	1042
M3933/16-32N	Cinch Connectivity Solutions Midwest Microwave	13dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	RoHS Non-compliant	1104
M3933/16-32S	Cinch Connectivity Solutions Midwest Microwave	13dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	RoHS Non-compliant	1052
M3933/14-20N	Cinch Connectivity Solutions Midwest Microwave	13dB	0 Hz ~ 12.4 GHz	—	50 Ohms	SMA In-Line Module	RoHS Non-compliant	928
M3933/16-34N	Cinch Connectivity Solutions Midwest Microwave	14dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	RoHS Non-compliant	1052
M3933/16-34S	Cinch Connectivity Solutions Midwest Microwave	14dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	RoHS Non-compliant	892
M3933/14-19N	Cinch Connectivity Solutions Midwest Microwave	14dB	0 Hz ~ 12.4 GHz	—	50 Ohms	SMA In-Line Module	RoHS Non-compliant	852
M3933/14-19S	Cinch Connectivity Solutions Midwest Microwave	14dB	0 Hz ~ 12.4 GHz	—	50 Ohms	SMA In-Line Module	RoHS Non-compliant	1120

Engineering Selection Recommendations

Direct Parametric Equivalents (Full Specification Match):

M3933/16-32N and M3933/16-32S are direct parametric equivalents to AT-113V, matching all critical specifications: 13dB attenuation, 0 Hz to 18 GHz frequency range, 2W power rating, and 50-ohm impedance in SMA in-line module configuration. Both parts are in Active product status with established inventory. The primary difference is RoHS non-compliance; selection depends on regulatory requirements of the end application.

Parametric Alternatives (Specification Deviations):

M3933/16-34N and M3933/16-34S provide full 18 GHz bandwidth and 2W power handling but with 14dB attenuation instead of 13dB. These are suitable only for applications where 1dB additional attenuation is acceptable.

M3933/14-20N provides matching 13dB attenuation but with reduced frequency range (0 Hz to 12.4 GHz) and unspecified power rating. This part is suitable only for applications operating below 12.4 GHz.

M3933/14-19N and M3933/14-19S provide 14dB attenuation with reduced frequency range (0 Hz to 12.4 GHz) and unspecified power rating. These represent the greatest deviation from AT-113V specifications.

Product Status Consideration:

AT-113V is Last Time Buy; M3933/16-32N and M3933/16-32S are Active status parts with higher inventory availability, making them preferred for new designs and long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can M3933/16-34N or M3933/16-34S be used as direct replacements for AT-113V?

A: These parts match all specifications except attenuation value (14dB vs. 13dB). They are suitable only if the application can tolerate 1dB additional signal loss. Frequency range and power rating are identical.

Q: What is the impact of RoHS non-compliance in M3933 series parts?

A: RoHS non-compliance indicates the presence of restricted substances (lead, cadmium, hexavalent chromium, etc.). Selection depends on end-product regulatory requirements. Applications subject to EU RoHS Directive, California RoHS, or equivalent regulations require RoHS-compliant parts. Unrestricted applications may use RoHS non-compliant parts.

Q: Are M3933/14-20N or M3933/14-19N suitable substitutes?

A: These parts have reduced frequency range (12.4 GHz maximum vs. 18 GHz) and are suitable only for applications operating entirely below 12.4 GHz. They are not suitable for full-bandwidth 18 GHz applications.

Q: What is the difference between M3933/16-32N and M3933/16-32S?

A: Both parts are parametrically identical with matching attenuation, frequency range, power rating, and impedance. The suffix designation (N vs. S) indicates internal configuration or connector type variant. Inventory levels differ (1104 vs. 1052 units). Consult manufacturer documentation for specific configuration details.

Q: Why is AT-113V in Last Time Buy status?

A: Last Time Buy status indicates Hirose Electric has discontinued production. M3933/16-32N and M3933/16-32S from Cinch Connectivity Solutions provide equivalent functionality with active production status and established supply chains for continued availability.

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