ACT90WE8SN Equivalent & Substitute Parts

Part Overview

The ACT90WE8SN is an 8-position circular connector receptacle manufactured by TE Connectivity Deutsch Connectors, designed for panel mount applications with female sockets and crimp termination. This connector conforms to MIL-DTL-38999 Series III specifications and is rated for 13A continuous current with an operating temperature range of -65°C to 175°C. The part is discontinued at DiGi Electronics, necessitating identification of equivalent alternatives for ongoing system support and procurement.

Key Parameters

Parameter	Value
Connector Type	Receptacle, Female Sockets
Number of Positions	8
Shell Size - Insert	17-8
Shell Size, MIL	E
Mounting Type	Panel Mount
Mounting Feature	Flange
Termination	Crimp
Fastening Type	Threaded
Orientation	N (Normal)
Shielding	Shielded
Current Rating	13A
Operating Temperature	-65°C to 175°C
Contact Finish - Mating	Gold
Contact Finish Thickness - Mating	50.0µin (1.27µm)
Series	MIL-DTL-38999 Series III

Substitute Part Grouping Explanation

Substitution of the ACT90WE8SN is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Connector type: Receptacle with female sockets
Position count: 8 positions
Shell size: 17-8 insert, MIL size E
Mounting configuration: Panel mount with flange
Termination method: Crimp
Fastening: Threaded
Shielding: Shielded
Current rating: 13A minimum
Operating temperature range: -65°C to 175°C minimum
Contact finish: Gold plating
Series compliance: MIL-DTL-38999 Series III

The substitute part D38999/20WE8SN meets all mandatory parameters while maintaining full electrical and mechanical compatibility with the original ACT90WE8SN specification.

Parameter Comparison

Parameter	ACT90WE8SN	D38999/20WE8SN	Compatibility
Manufacturer	TE Connectivity Deutsch Connectors	TE Connectivity Deutsch Connectors	Identical
Connector Type	Receptacle, Female Sockets	Receptacle, Female Sockets	Identical
Number of Positions	8	8	Identical
Shell Size - Insert	17-8	17-8	Identical
Shell Size, MIL	E	E	Identical
Mounting Type	Panel Mount	Panel Mount	Identical
Mounting Feature	Flange	Flange	Identical
Termination	Crimp	Crimp	Identical
Fastening Type	Threaded	Threaded	Identical
Orientation	N (Normal)	N (Normal)	Identical
Shielding	Shielded	Shielded	Identical
Current Rating (Amps)	13A	13A	Identical
Operating Temperature	-65°C to 175°C	-65°C to 175°C	Identical
Contact Finish - Mating	Gold	Gold	Identical
Contact Finish Thickness - Mating	50.0µin (1.27µm)	50.0µin (1.27µm)	Identical
Contact Material	Copper Alloy	Copper Alloy	Identical
Insert Material	Thermoplastic	Thermoplastic	Identical
Series	MIL-DTL-38999 Series III, ACT	MIL-DTL-38999 Series III, DTS	Compatible
Shell Material	Composite	Aluminum	Different
Color	Olive Drab	Olive Drab	Identical
Ingress Protection	Environment Resistant	Environment Resistant	Identical
RoHS Status	RoHS non-compliant	RoHS non-compliant	Identical
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Identical
ECCN	EAR99	EAR99	Identical
HTSUS	8536.69.4020	8536.69.4020	Identical

Engineering Selection Recommendations

The D38999/20WE8SN serves as a direct functional equivalent to the discontinued ACT90WE8SN. Both connectors are manufactured by TE Connectivity Deutsch Connectors and comply with MIL-DTL-38999 Series III specifications. The primary material difference—composite shell in the ACT90WE8SN versus aluminum shell in the D38999/20WE8SN—does not affect electrical or mechanical compatibility, as both materials satisfy the specified environmental resistance and operating temperature requirements.

Both parts carry identical electrical ratings (13A current, -65°C to 175°C operating range), contact specifications (gold plating at 50.0µin thickness), and termination methods (crimp). Both are RoHS non-compliant and classified under identical ECCN and HTSUS codes, indicating equivalent regulatory treatment.

The D38999/20WE8SN includes a self-locking feature not specified in the ACT90WE8SN, which provides enhanced mechanical security without compromising compatibility. Current inventory availability for the D38999/20WE8SN (722 pieces) supports procurement for ongoing applications.

Frequently Asked Questions (FAQ)

Q: Can the D38999/20WE8SN directly replace the ACT90WE8SN in existing assemblies?

A: Yes. Both connectors meet identical electrical specifications (13A, -65°C to 175°C), mechanical dimensions (8-position, size 17-8, MIL size E), and termination requirements (crimp). The threaded panel mount flange configuration is identical. Mating interfaces are fully compatible.

Q: What is the significance of the different shell materials (composite vs. aluminum)?

A: Both materials satisfy the specified environment resistance and operating temperature range. The material difference does not affect electrical performance, current carrying capacity, or thermal characteristics within the stated operating limits. Both shells provide equivalent shielding effectiveness for the shielded connector design.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts are RoHS non-compliant, carry identical ECCN (EAR99) and HTSUS (8536.69.4020) classifications, and maintain MSL 1 (Unlimited) moisture sensitivity ratings. Regulatory treatment is equivalent.

Q: What does the self-locking feature on the D38999/20WE8SN provide?

A: The self-locking feature enhances mechanical retention of the mated connector pair through internal locking mechanisms. This feature does not affect electrical compatibility and provides additional security for applications requiring vibration resistance or frequent mating cycles.

Q: Are the crimp contact specifications identical?

A: Yes. Both connectors use copper alloy contacts with 50.0µin (1.27µm) gold plating on mating surfaces. Crimp termination specifications are identical, ensuring compatibility with existing cable assembly tooling and procedures.

Q: What is the current inventory status for the substitute part?

A: The D38999/20WE8SN has 722 pieces in stock as new original inventory. Both the original ACT90WE8SN and substitute D38999/20WE8SN are discontinued at DiGi Electronics, making current inventory availability a critical factor for procurement planning.

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