FGA.1B.304.CLAD42Z Equivalent & Substitute Parts

Part Overview

The FGA.1B.304.CLAD42Z is a 4-position circular connector plug with male pins and solder cup termination, manufactured by LEMO. This connector is designed for applications requiring shielded, push-pull fastening with gold-plated mating contacts and operates across a wide temperature range of -55°C to 250°C. The part is currently active in production with 665 units in stock. Equivalent and substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements permit functional alternatives.

Substiute Parts

FGA.1B.304.CLAD42Z

LEMOIn Stock: 683FGA.1B.304.CLAD42Z Datasheet

Current PartRFQ

S21LAC-P04MJG0-420S

ODUIn Stock: 826S21LAC-P04MJG0-420S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part S21LAC-P04MJG0-420S from ODU is identified as functionally equivalent based on the following critical parameters:

• Connector type: Both are plug connectors with male pins
• Position count: Both feature 4-position configurations
• Termination method: Both utilize solder cup termination
• Fastening mechanism: Both employ push-pull fastening
• Shell material and finish: Both use brass with chrome plating
• Contact finish: Both feature gold-plated mating contacts
• Shielding: Both are shielded designs
• Insert material: Both use PEEK inserts
• Compliance: Both are ROHS3 compliant and REACH unaffected

Substitution is permitted where the operating environment and electrical requirements fall within the constraints of the substitute part's specifications.

Parameter Comparison

Engineering Selection Recommendations

Both parts maintain active product status and ROHS3 compliance. Selection between the FGA.1B.304.CLAD42Z and S21LAC-P04MJG0-420S depends on application-specific constraints:

The FGA.1B.304.CLAD42Z is suitable for applications requiring the full specified current rating of 10A and extended operating temperature range of -55°C to 250°C.

The S21LAC-P04MJG0-420S is suitable for applications operating within -40°C to 120°C temperature limits and requiring maximum current of 7.5A. This substitute provides additional features including strain relief and is specified for industrial, medical, military, and testing equipment applications.

Both parts are REACH unaffected and carry EAR99 ECCN classification.

Frequently Asked Questions (FAQ)

Q: Can S21LAC-P04MJG0-420S replace FGA.1B.304.CLAD42Z in all applications?

A: Substitution is valid only when the application operates within the ODU part's temperature range (-40°C to 120°C) and current requirements do not exceed 7.5A. The LEMO part supports higher current (10A) and extended temperature operation (-55°C to 250°C).

Q: What are the mechanical compatibility considerations?

A: Both connectors use 4-position push-pull fastening with solder cup termination and PEEK inserts. Cable opening ranges are nearly identical (3.00mm to 4.20mm for ODU versus 3.10mm to 4.20mm for LEMO), permitting compatible cable assemblies within the overlapping range.

Q: Are there differences in shell finish that affect performance?

A: The LEMO part features chrome plating on brass, while the ODU part features chrome over nickel plating on brass. Both finishes provide equivalent corrosion resistance and are suitable for IP50 dust-protected applications.

Q: Do both parts meet the same compliance standards?

A: Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. Both are classified as EAR99 for export control purposes.

Q: What is the significance of the cable opening specification?

A: Cable opening specifications define the acceptable cable diameter range for proper strain relief and sealing. The overlapping range (3.10mm to 4.20mm) permits cable assemblies to be compatible with both connectors within this window.