Terminals - Solder Lug Connectors

Image Part Number Description / PDF Quantity Rfq
7326

7326

Keystone Electronics Corp.

CONN TERM LUG RING #6 FLAT

182315800

7318

7318

Keystone Electronics Corp.

CONN TERM LUG LOCKWASHR #6 ANGLE

2147483647

7328

7328

Keystone Electronics Corp.

CONN TERM LUG RING #4 FLAT

2147483647

909

909

Keystone Electronics Corp.

CONN TERM LUG LOCKWASHER #4 FLAT

40392700

1274

1274

Keystone Electronics Corp.

CONN TERM LUG RING #4 FLAT

8900

7339

7339

Keystone Electronics Corp.

CONN TERM LUG RING FLAT

0

Terminals - Solder Lug Connectors

1. Overview

Solder lug connectors are electrical components designed to establish permanent connections between wires/cables and conductive surfaces through soldering processes. These connectors feature a barrel-shaped termination area for wire insertion and a flat mounting surface with holes for mechanical fixation. Their importance lies in providing reliable electrical continuity and mechanical stability in power distribution systems, control circuits, and electronic assemblies across various industries.

2. Major Types & Functional Classification

TypeFeaturesApplications
Ring Terminal360 closed loop designAutomotive ground connections
Fork TerminalOpen loop for bolted connectionsIndustrial control panels
Spade TerminalQuick-disconnect flat interfaceConsumer electronics
Right-Angle Terminal90 bent structureSpace-constrained enclosures
Multi-hole TerminalMultiple mounting pointsHigh-vibration environments

3. Structure & Composition

Typical construction includes: - Conductive base (copper/tin-plated copper) - Insulated transition zone (thermoplastic material) - Solder barrel (annealed copper alloy) - Mounting flange with M2-M8 threaded holes - Corrosion-resistant plating (nickel/silver/zinc)

4. Key Technical Specifications

ParameterValue RangeSignificance
Current Rating10-300ADetermines power capacity
Voltage Rating300-1000VDefines insulation requirements
Contact Resistance 0.5m Impacts energy efficiency
Temperature Range-55 C to +150 CEnvironmental durability
Wire Gauge Range26AWG to 4/0AWGCompatibility with conductors

5. Application Areas

Primary industries include: - Automotive (battery terminals, alternator connections) - Renewable energy (solar inverters, wind turbines) - Industrial automation (PLC cabinets, motor controls) - Telecommunications (base station power systems) - Consumer electronics (power supply units, audio equipment)

6. Leading Manufacturers & Products

ManufacturerProduct SeriesKey Features
TE ConnectivityDeutsch DT SeriesHigh-vibration resistance
Phoenix ContactST 16-250250mm wire capacity
AmphenolIndustrial 400 SeriesIP67 rated housing
YazakiY-Connect SeriesAutomotive OEM standard

7. Selection Guidelines

Key considerations: - Match wire gauge to terminal barrel diameter - Verify current/voltage requirements with safety margins - Environmental factors (humidity, temperature extremes) - Mechanical stress requirements (vibration, torque) - Regulatory compliance (RoHS, UL, ISO standards)

8. Industry Trends Analysis

Current development directions: - Miniaturization with high-current density designs - Integration of smart monitoring capabilities - Adoption of eco-friendly plating materials - Enhanced thermal management solutions - Standardization for cross-industry compatibility

Application Case: EV Battery Connection

Modern electric vehicles employ multi-layer solder lug connectors with integrated thermal fuses to handle 400A+ currents while maintaining ISO 26262 functional safety compliance. The connectors feature anti-creepage distances and vibration-damping coatings for automotive powertrains.

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