AT-101V RF Attenuator 1dB 50 Ohm SMA In-Line Module Equivalent & Substitute Parts

Part Overview

The AT-101V is a 1dB RF fixed attenuator manufactured by Hirose Electric Co Ltd, designed for RF signal attenuation across 0 Hz to 18 GHz frequency range with 50 Ohm impedance and 2W power handling capability in SMA in-line module form factor. The part is currently in Last Time Buy status, indicating production discontinuation. Equivalent and substitute parts are necessary to ensure continued availability and system compatibility for applications requiring identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Attenuation Value	1dB
Frequency Range	0 Hz ~ 18 GHz
Power Rating	2W
Impedance	50 Ohms
Package / Case	SMA In-Line Module
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitute parts for the AT-101V are classified based on strict parametric equivalence. The primary substitution criteria are:

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

Frequency range variations are permitted only when the substitute part's frequency range encompasses or equals the main part's 0 Hz ~ 18 GHz specification. Parts with reduced frequency ranges (0 Hz ~ 2 GHz or 0 Hz ~ 12.4 GHz) are listed for reference but represent limited-bandwidth alternatives.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Attenuation (dB)	Frequency Range	Power (W)	Impedance (Ω)	Package	Product Status	RoHS Status
AT-101V	Hirose Electric Co Ltd	1	0 Hz ~ 18 GHz	2	50	SMA In-Line Module	Last Time Buy	RoHS Compliant
LCAT1006-01	L-com	1	0 Hz ~ 18 GHz	2	50	SMA In-Line Module	Active	Not Specified
M3933/16-05N	Cinch Connectivity Solutions Midwest Microwave	1	0 Hz ~ 18 GHz	Not Specified	50	SMA In-Line Module	Active	RoHS Non-Compliant
M3933/16-05S	Cinch Connectivity Solutions Midwest Microwave	1	0 Hz ~ 18 GHz	2	50	SMA In-Line Module	Active	RoHS Non-Compliant
M3933/25-01N	Cinch Connectivity Solutions Midwest Microwave	1	0 Hz ~ 2 GHz	2	50	SMA In-Line Module	Active	RoHS Non-Compliant
M3933/25-27N	Cinch Connectivity Solutions Midwest Microwave	1	0 Hz ~ 12.4 GHz	2	50	SMA In-Line Module	Active	RoHS Non-Compliant
M3933/25-27S	Cinch Connectivity Solutions Midwest Microwave	1	0 Hz ~ 12.4 GHz	2	50	SMA In-Line Module	Active	RoHS Non-Compliant

Engineering Selection Recommendations

Full-Bandwidth Equivalents (0 Hz ~ 18 GHz):

LCAT1006-01 (L-com) provides complete parametric equivalence with the AT-101V across all electrical specifications and maintains active product status. This part is the primary substitute for applications requiring the full 18 GHz frequency range.

M3933/16-05S (Cinch Connectivity Solutions Midwest Microwave) offers full parametric equivalence including 2W power rating and 18 GHz frequency range. This part is qualified to MIL-DTL-M3933 military specification. RoHS non-compliance must be evaluated against application requirements.

M3933/16-05N (Cinch Connectivity Solutions Midwest Microwave) matches frequency range and impedance specifications but does not specify power rating. This part is qualified to MIL-DTL-M3933 military specification and is suitable only when power rating verification is not critical.

Limited-Bandwidth Alternatives:

M3933/25-01N and M3933/25-27N/S are restricted to 0 Hz ~ 2 GHz and 0 Hz ~ 12.4 GHz respectively. These parts are suitable only for applications operating within their specified frequency ranges and do not provide full AT-101V frequency coverage.

Frequently Asked Questions (FAQ)

Q: Can M3933/16-05N be used as a direct substitute for AT-101V?

A: M3933/16-05N matches the frequency range (0 Hz ~ 18 GHz) and impedance (50 Ohms) specifications. However, power rating is not specified in the datasheet. Verification of 2W power handling capability is required before substitution in power-sensitive applications.

Q: What is the difference between M3933/16-05N and M3933/16-05S?

A: Both parts share identical frequency range (0 Hz ~ 18 GHz) and impedance (50 Ohms). M3933/16-05S explicitly specifies 2W power rating, while M3933/16-05N does not. Both are RoHS non-compliant and MIL-DTL-M3933 qualified.

Q: Are M3933/25-01N and M3933/25-27S suitable replacements for AT-101V?

A: These parts are not suitable for full-bandwidth replacement. M3933/25-01N operates only to 2 GHz, and M3933/25-27N/S operate only to 12.4 GHz. Use these parts only in applications where operation is limited to their respective frequency ranges.

Q: Does RoHS compliance affect substitution decisions?

A: RoHS compliance is a regulatory and supply chain consideration. AT-101V is RoHS compliant. Substitute parts from Cinch Connectivity Solutions (M3933 series) are RoHS non-compliant. Selection depends on application regulatory requirements and end-market restrictions.

Q: What is the inventory status of substitute parts?

A: LCAT1006-01 has 673 units in stock. M3933/16-05S and M3933/25-27S each have approximately 1000+ units in stock. M3933/16-05N and M3933/25-01N/27N have 940-1007 units in stock. All substitute parts are listed as active products with ongoing availability.

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