PAA.M0.4GL.AC39GZ Equivalent & Substitute Parts

Part Overview

The PAA.M0.4GL.AC39GZ is a 4-position circular connector plug with male pins and solder cup termination, manufactured by LEMO. This connector is classified as active product status and is designed for free-hanging, in-line applications requiring push-pull detent lock fastening. The connector features gold-plated mating contacts, polysulfone shell construction, and an IP50 ingress protection rating suitable for dust-protected environments. Alternative models are identified to provide options for procurement, inventory management, and application-specific requirements where equivalent electrical and mechanical specifications are maintained.

Key Parameters

Parameter	Value
Connector Type	Plug, Male Pins
Number of Positions	4
Shell Size - Insert	M04
Termination	Solder Cup
Fastening Type	Push-Pull, Detent Lock
Shell Material	Polysulfone (PSU)
Contact Finish - Mating	Gold
Ingress Protection	IP50 - Dust Protected
Current Rating	8A
Operating Temperature	-50°C ~ 150°C
Cable Opening	0.106" ~ 0.154" (2.70mm ~ 3.90mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the PAA.M0.4GL.AC39GZ is determined by the following critical parameters:

Connector Type & Gender: Plug with male pins (mechanical and electrical interface requirement)
Position Count: 4 positions (signal/power routing requirement)
Termination Method: Solder cup (assembly and integration requirement)
Shell Material: Polysulfone (PSU) (environmental and mechanical durability requirement)
Contact Finish: Gold plating (electrical conductivity and corrosion resistance requirement)
Fastening Mechanism: Push-pull detent lock (mating interface requirement)
Ingress Protection: IP50 minimum (environmental sealing requirement)
Current Rating: 8A or higher (electrical capacity requirement)
Operating Temperature Range: Must encompass -50°C to 150°C or be compatible with application limits

The substitute part S21MA7-P04MJG0-397S meets these core criteria with equivalent or superior specifications in all critical parameters.

Parameter Comparison

Parameter	PAA.M0.4GL.AC39GZ (LEMO)	S21MA7-P04MJG0-397S (ODU)	Compatibility
Connector Type	Plug, Male Pins	Plug, Male Pins	Equivalent
Number of Positions	4	4	Equivalent
Termination	Solder Cup	Solder Cup	Equivalent
Fastening Type	Push-Pull, Detent Lock	Push-Pull	Compatible
Shell Material	Polysulfone (PSU)	Polysulfone (PSU)	Equivalent
Contact Finish - Mating	Gold	Gold	Equivalent
Ingress Protection	IP50 - Dust Protected	IP50 - Dust Protected	Equivalent
Current Rating (Amps)	8A	10A	Substitute Rated Higher
Operating Temperature	-50°C ~ 150°C	-50°C ~ 120°C	Substitute Range Narrower
Cable Opening	0.106" ~ 0.154" (2.70mm ~ 3.90mm)	0.106" ~ 0.154" (2.70mm ~ 3.90mm)	Equivalent
Insert Material	Polyetheretherketone (PEEK)	Polyetheretherketone (PEEK)	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent

Engineering Selection Recommendations

Both the PAA.M0.4GL.AC39GZ and S21MA7-P04MJG0-397S maintain active product status and full ROHS3 compliance with REACH unaffected classification. Selection between these parts should be based on the following provided specifications:

PAA.M0.4GL.AC39GZ (LEMO) is suitable when the full operating temperature range of -50°C to 150°C is required for the application.

S21MA7-P04MJG0-397S (ODU) is suitable for applications operating within -50°C to 120°C and where the higher 10A current rating provides additional margin. This substitute includes strain relief features in addition to backshell construction.

Both connectors are certified for industrial, medical, and testing equipment applications with equivalent electrical and mechanical performance within their respective operating parameters.

Frequently Asked Questions (FAQ)

Q: Can S21MA7-P04MJG0-397S directly replace PAA.M0.4GL.AC39GZ in all applications?

A: Direct substitution is valid for applications where the operating temperature does not exceed 120°C. If your application requires operation above 120°C, the PAA.M0.4GL.AC39GZ must be used due to its extended temperature rating to 150°C.

Q: What are the key mechanical compatibility factors?

A: Both connectors share identical 4-position configuration, M04 shell size insert, push-pull fastening interface, cable opening dimensions (0.106" ~ 0.154"), and solder cup termination. Mating interfaces are mechanically compatible.

Q: Are there differences in current-carrying capacity?

A: The PAA.M0.4GL.AC39GZ is rated for 8A, while the S21MA7-P04MJG0-397S is rated for 10A. For applications requiring currents between 8A and 10A, the ODU substitute provides additional capacity margin.

Q: What packaging considerations apply?

A: PAA.M0.4GL.AC39GZ is supplied in standard packaging, while S21MA7-P04MJG0-397S is supplied in bulk packaging. Verify packaging requirements for your procurement and assembly processes.

Q: Are both parts RoHS and REACH compliant?

A: Yes, both PAA.M0.4GL.AC39GZ and S21MA7-P04MJG0-397S are ROHS3 compliant with REACH unaffected status, meeting regulatory requirements for industrial, medical, and testing equipment applications.

Q: What is the difference in fastening mechanisms?

A: PAA.M0.4GL.AC39GZ features push-pull with detent lock, while S21MA7-P04MJG0-397S features push-pull fastening. Both provide secure mating interfaces suitable for the specified applications.

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