Circular Connectors - Adapters

Image Part Number Description / PDF Quantity Rfq
21038211825

21038211825

HARTING

CONN ADAPTER 8P-8P M-M PNL MNT

91

21033816815

21033816815

HARTING

CONN GENDER CHANGER 8P-8P F-M

108

21033812403

21033812403

HARTING

CONN ADAPTER 4P-4P F-M INLINE

1

21033219400

21033219400

HARTING

CONN Y-ADPT 5P-5/5P M-F/F INLINE

6

21033199501

21033199501

HARTING

CONN T-ADPT 5P-5/5P F-F/M INLINE

100

21033816403

21033816403

HARTING

CONN GENDER CHANGER 4P-4P F-F

4

21038811825

21038811825

HARTING

CONN ADAPTER 8P-8P M-M PNL MNT

89

21033301300

21033301300

HARTING

CONN ADAPTER 5P-5P F-M PNL MNT

3

21033816401

21033816401

HARTING

CONN GENDER CHANGER 4P-4P F-F

20

21033816816

21033816816

HARTING

CONN GENDER CHANGER 8P-8P F-F

7

21033816402

21033816402

HARTING

CONN GENDER CHANGER 4P-8P F-F

0

21033816404

21033816404

HARTING

CONN GENDER CHANGER 8P-4P F-F

0

21053812406

21053812406

HARTING

PNL FEED THRU QCS D-COD SLDR PIN

0

Circular Connectors - Adapters

1. Overview

Circular connectors-adapters are electromechanical devices enabling seamless signal/power transmission between components with different interface standards. Defined by IEC 60512 standards, these adapters feature cylindrical housings with multiple contact points, offering critical bridging solutions in complex systems. Their importance spans across aerospace, industrial automation, and medical equipment, where they ensure interoperability while maintaining signal integrity under harsh conditions.

2. Major Types & Functional Classification

TypeFunctional FeaturesApplication Examples
MIL-DTL-5015 AdaptersThreaded coupling, 4-95 contacts, vibration resistanceMilitary communication systems
MIL-DTL-38999 AdaptersHigh-density, environmental sealing (IP67)Aerospace sensor interfaces
USB-C Circular AdaptersHybrid signal/power transmission, reversible designIndustrial IoT devices
BNC-TNC AdaptersBayonet/ threaded coupling, 0-11GHz frequency rangeRF test equipment

3. Structural Composition

Typical construction includes: - Metal housing: Aluminum alloy or stainless steel with plating (nickel/gold) - Contact elements: Phosphor bronze with precision-machined contact areas - Insulation: High-temperature resistant thermoplastics (operating range: -55 C to +200 C) - Sealing system: Multi-lip elastomer gaskets for IP68 protection - Mating interface: Polarized keying system preventing misalignment

4. Key Technical Parameters

ParameterImportance
Current Rating (1-50A)Determines power transmission capacity
Contact Resistance ( 5m )Impacts signal fidelity
Dielectric Withstanding Voltage (500V-5kV)Ensures electrical safety
Insertion Loss ( 0.5dB)Microwave signal integrity
Shock Resistance (50G-150G)Survivability in extreme environments
Durability (500-10,000 mating cycles)Lifecycle cost efficiency

5. Application Fields

Key industries include: - Aerospace: Flight control systems (e.g., Boeing 787 sensor networks) - Industrial Automation: Siemens SIMATIC controllers interconnection - Medical Equipment: MRI machine RF connectors (Philips Ingenia series) - Telecommunications: 5G base station antenna interfaces - Transportation: High-speed train diagnostic systems (Siemens Velaro)

6. Leading Manufacturers

ManufacturerRepresentative Product
Amphenol AerospaceSerie 801 MIL-DTL-38999 Adapter
TE ConnectivityDEUTSCH DT06-6P Adapter
ITT CannonC Series C63EA-20-19P
MolexMX150L Adapter System

7. Selection Guidelines

Key considerations: - Electrical Requirements: Match current/voltage ratings with system needs - Environmental Conditions: Consider temperature range, corrosion resistance - Mechanical Compatibility: Verify thread types (UNF/Metric) and keying - Standard Compliance: MIL-STD-810, ISO 6722 certification - Maintenance Factors: Evaluate ease of field repairability

8. Industry Trend Analysis

Current developments show: - Miniaturization: 30% size reduction in USB-C hybrid adapters - High-speed Data: 40Gbps+ transmission rates in new RF adapters - Smart Integration: Embedded sensors for condition monitoring - Material Innovation: Graphene-coated contacts reducing resistance by 40% - Standardization: Growing adoption of IEC 61076-1 universal interface standard

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