RF Attenuator AT-506(40) Equivalent & Substitute Parts

Part Overview

The AT-506(40) is a 6dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for inline attenuation in 50-ohm RF systems operating from DC to 4 GHz with 2W power handling capability. This part carries a Last Time Buy status, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure continued availability for system maintenance, design updates, and production continuity.

Key Parameters

Parameter	Value
Attenuation Value	6dB
Frequency Range	0 Hz ~ 4 GHz
Power Rating	2W
Impedance	50 Ohms
Package / Case	BNC In-Line Module
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AT-506(40) is determined by matching the following critical parameters:

Attenuation Value: 6dB (exact match required)
Frequency Range: 0 Hz ~ 4 GHz (minimum coverage required)
Power Rating: 2W (minimum required)
Impedance: 50 Ohms (exact match required for system compatibility)
Package / Case: BNC In-Line Module (mechanical and electrical interface requirement)

Parts are grouped into two categories:

Full Equivalents: Parts matching all critical parameters (attenuation, frequency range, power, impedance, and package).

Partial Equivalents: Parts matching attenuation, power, impedance, and package but with extended frequency range capabilities. These provide superior performance within the AT-506(40) operating envelope.

Non-Equivalent Parts: Parts with impedance or frequency range deviations that do not meet substitution criteria for direct replacement.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Attenuation	Frequency Range	Power (W)	Impedance (Ω)	Package	Product Status	Inventory (Pcs)
AT-506(40)	Hirose Electric Co Ltd	6dB	0 Hz ~ 4 GHz	2W	50	BNC In-Line Module	Last Time Buy	746
6806.01.A	Huber+Suhner, Inc.	6dB	0 Hz ~ 4 GHz	2W	50	BNC In-Line Module	Active	657
ATT-0313-06-BNC-10	Cinch Connectivity Solutions Midwest Microwave	6dB	0 Hz ~ 4 GHz	2W	50	BNC In-Line Module	Active	1158
CT3353-06	Cal Test Electronics	6dB	0 Hz ~ 4 GHz	2W	50	BNC In-Line Module	Active	1061
CT3369A-06	Cal Test Electronics	6dB	0 Hz ~ 4 GHz	2W	50	BNC In-Line Module	Active	842
PE7437-6	Pasternack	6dB	0 Hz ~ 4 GHz	2W	50	BNC In-Line Module	Active	915
PE7438-6	Pasternack	6dB	0 Hz ~ 4 GHz	2W	75	BNC In-Line Module	Active	1046
R412406000	Radiall USA, Inc.	6dB	0 Hz ~ 2 GHz	2W	50	BNC In-Line Module	Active	903
R414406000	Radiall USA, Inc.	6dB	0 Hz ~ 8 GHz	2W	50	2W	Active	1097
R414406150	Radiall USA, Inc.	6dB	0 Hz ~ 4 GHz	2W	50	BNC In-Line Module	Active	969

Engineering Selection Recommendations

Full Equivalents (Direct Replacement)

The following parts are direct substitutes for the AT-506(40) and match all critical electrical and mechanical parameters:

6806.01.A (Huber+Suhner, Inc.) — Active status, REACH Unaffected
ATT-0313-06-BNC-10 (Cinch Connectivity Solutions Midwest Microwave) — Active status, RoHS Compliant
CT3353-06 (Cal Test Electronics) — Active status, ROHS3 Compliant
CT3369A-06 (Cal Test Electronics) — Active status, ROHS3 Compliant
PE7437-6 (Pasternack) — Active status, RoHS Compliant
R414406150 (Radiall USA, Inc.) — Active status, ROHS3 Compliant

Extended Frequency Range (Superior Performance)

R414406000 (Radiall USA, Inc.) — Extends frequency coverage to 8 GHz while maintaining 50-ohm impedance and 2W power rating. Suitable for applications requiring headroom beyond 4 GHz.

Non-Equivalent Parts (Not Recommended for Direct Substitution)

PE7438-6 (Pasternack) — 75-ohm impedance; incompatible with 50-ohm system designs
R412406000 (Radiall USA, Inc.) — Limited to 2 GHz frequency range; insufficient for full 4 GHz operation

Frequently Asked Questions (FAQ)

Q: Can PE7438-6 replace the AT-506(40)?

A: No. PE7438-6 has 75-ohm impedance while AT-506(40) requires 50-ohm impedance. Impedance mismatch causes signal reflections and system performance degradation.

Q: Is R412406000 suitable as a substitute?

A: No. R412406000 operates only to 2 GHz, which is below the AT-506(40) specification of 4 GHz. Use only in applications confirmed to operate below 2 GHz.

Q: What is the difference between the full equivalents?

A: All full equivalents match the AT-506(40) electrical specifications (6dB, 0-4 GHz, 2W, 50Ω) and BNC package. Selection depends on manufacturer preference, supply chain availability, and compliance certifications required for your application.

Q: Can R414406000 be used instead of AT-506(40)?

A: Yes, with consideration. R414406000 extends frequency coverage to 8 GHz while maintaining all other specifications. It provides superior performance margin for applications operating within the 0-4 GHz band and is suitable for future-proofing designs.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts carry either RoHS or ROHS3 compliance status. Verify specific compliance requirements for your application and supply chain documentation.

Q: What packaging is available for these parts?

A: All equivalent and substitute parts are supplied in Bulk packaging as BNC In-Line Modules, matching the AT-506(40) form factor.

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