AT-1906(40) RF Attenuator 6dB 50 Ohm SMA Equivalent & Substitute Parts

Part Overview

The AT-1906(40) is a 6dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for in-line attenuation applications across 0 Hz to 8 GHz frequency range with 50 Ohm impedance and 2W power handling capability in SMA connector configuration. This part is currently in Last Time Buy status, making equivalent and substitute parts identification critical for ongoing procurement and design continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	AT-1906(40)
Manufacturer	Hirose Electric Co Ltd
Attenuation Value	6dB
Frequency Range	0 Hz ~ 8 GHz
Power Rating	2W
Impedance	50 Ohms
Package / Case	SMA In-Line Module
RoHS Status	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitute parts for the AT-1906(40) are qualified based on the following critical parameters:

Core Electrical Parameters (Must Match):

Attenuation Value: 6dB
Impedance: 50 Ohms
Power Rating: 2W
Package Type: SMA In-Line Module

Frequency Range Compatibility: Substitute parts are grouped by frequency range capability. The AT-1906(40) operates 0 Hz ~ 8 GHz. Substitutes with equal or greater frequency range are electrically compatible for applications within the original 8 GHz specification.

Compliance Considerations: RoHS status and moisture sensitivity level are documented for procurement and environmental compliance verification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Attenuation (dB)	Frequency Range (GHz)	Power (W)	Impedance (Ω)	Package	RoHS Status	Product Status	Inventory (Pcs)
AT-1906(40)	Hirose Electric Co Ltd	6	0 ~ 8	2	50	SMA In-Line Module	RoHS Compliant	Last Time Buy	784
6606_SMA-50-1/199_NE	Huber+Suhner, Inc.	6	0 ~ 18	2	50	SMA In-Line Module	ROHS3 Compliant	Active	883
6606_SMA-50-2/199_NE	Huber+Suhner, Inc.	6	0 ~ 6	2	50	SMA In-Line Module	ROHS3 Compliant	Active	997
6606_SMA-50-3/199_NE	Huber+Suhner, Inc.	6	0 ~ 27	2	50	SMA In-Line Module	ROHS3 Compliant	Active	932
ATS-1M1F-06DB2W	Amphenol RF	6	0 ~ 6	2	50	SMA In-Line Module	ROHS3 Compliant	Active	1555
ATT-0238-06-SMA-02	Cinch Connectivity Solutions Midwest Microwave	6	0 ~ 4	2	50	SMA In-Line Module	RoHS Compliant	Active	888
CT4458-06	Cal Test Electronics	6	0 ~ 18	2	50	SMA In-Line Module	ROHS3 Compliant	Active	928
M3933/25-70S	Cinch Connectivity Solutions Midwest Microwave	6	0 ~ 18	2	50	SMA In-Line Module	RoHS non-compliant	Active	848
P1AT-SAMF-18G2W-6	P1dB Inc	6	0 ~ 18	2	50	SMA In-Line Module	ROHS3 Compliant	Active	847

Engineering Selection Recommendations

Direct Substitutes (Frequency Range ≥ 8 GHz, Active Status):

The following parts are electrically equivalent to AT-1906(40) with extended frequency range capability and active product status:

6606_SMA-50-1/199_NE (Huber+Suhner): 0 ~ 18 GHz, ROHS3 Compliant, 883 units in stock
6606_SMA-50-3/199_NE (Huber+Suhner): 0 ~ 27 GHz, ROHS3 Compliant, 932 units in stock
CT4458-06 (Cal Test Electronics): 0 ~ 18 GHz, ROHS3 Compliant, 928 units in stock
P1AT-SAMF-18G2W-6 (P1dB Inc): 0 ~ 18 GHz, ROHS3 Compliant, 847 units in stock

Limited Frequency Range Substitutes (Frequency Range < 8 GHz, Active Status):

These parts are electrically equivalent within their specified frequency ranges:

6606_SMA-50-2/199_NE (Huber+Suhner): 0 ~ 6 GHz, ROHS3 Compliant, 997 units in stock
ATS-1M1F-06DB2W (Amphenol RF): 0 ~ 6 GHz, ROHS3 Compliant, 1555 units in stock
ATT-0238-06-SMA-02 (Cinch Connectivity Solutions): 0 ~ 4 GHz, RoHS Compliant, 888 units in stock

Compliance Note:

M3933/25-70S (Cinch Connectivity Solutions) is RoHS non-compliant and should be selected only when legacy compliance requirements apply.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher frequency range than the original AT-1906(40)?

A: Yes. A substitute with frequency range 0 ~ 18 GHz or higher is electrically compatible for applications operating within the original 0 ~ 8 GHz specification. The attenuator will function correctly at all frequencies up to 8 GHz.

Q: What is the critical parameter for determining substitutability?

A: The core parameters are attenuation value (6dB), impedance (50 Ohms), power rating (2W), and SMA In-Line Module package. All listed substitutes meet these requirements. Frequency range determines the upper operating limit of the application.

Q: Are there connector compatibility issues between SMA In-Line Module substitutes?

A: No. All listed substitutes use SMA connectors in in-line module configuration and are mechanically and electrically compatible with the same circuit board footprints and connector interfaces as the AT-1906(40).

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

A: Both designations indicate compliance with RoHS directives. ROHS3 represents compliance with the most recent RoHS 3 directive. Both are acceptable for modern procurement unless legacy specifications require the original RoHS designation.

Q: Why is the AT-1906(40) listed as Last Time Buy?

A: Last Time Buy status indicates the manufacturer is discontinuing production. Substitute parts with Active status from alternative manufacturers provide continuity for ongoing designs and procurement.

Q: Can I substitute the P1AT-29MF-40G2W-6 for the AT-1906(40)?

A: No. The P1AT-29MF-40G2W-6 uses a 2.92mm connector package, not SMA. It is not mechanically compatible with SMA-based circuit designs.

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