INDUSTRY COMPONENT

Terminal Pins

Terminal pins are conductive metal components that provide electrical connections in refrigerator compressor thermal overload protectors.

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Component Specifications

Definition
Terminal pins are precision-engineered conductive components designed to establish secure electrical connections between the thermal overload protector and the compressor circuit in refrigeration systems. They serve as the interface points for power supply and control signals, ensuring reliable operation of the protective mechanism that prevents compressor damage from overheating.
Working Principle
Terminal pins function by providing a low-resistance electrical pathway between connected components. When installed in a thermal overload protector, they transmit electrical current to the bimetallic strip or thermal element. When excessive temperature occurs, the protector interrupts the circuit through these pins, cutting power to the compressor to prevent damage.
Materials
Copper alloy (typically C11000 or C26000) with tin or silver plating for corrosion resistance and improved conductivity. Alternative materials include brass or phosphor bronze for specific applications.
Technical Parameters
  • Pin Length 15mm ±0.5mm
  • Pin Diameter 2.8mm ±0.1mm
  • Current Rating 10-20A
  • Voltage Rating 250V AC
  • Temperature Range -40°C to 125°C
  • Contact Resistance <5mΩ
  • Insulation Resistance >100MΩ
Standards
ISO 8092, DIN 46247, UL 310, IEC 60947

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Terminal Pins.

terminal pins electrical connectors compressor protector thermal overload refrigerator components electrical contacts refrigeration parts Terminal Pins in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Refrigerator Compressor Thermal Overload Protector

Thermal protection device for refrigerator compressor motors

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Engineering Analysis

Risks & Mitigation
  • Poor electrical contact leading to overheating
  • Corrosion causing increased resistance
  • Mechanical stress causing pin deformation
  • Incompatible materials causing galvanic corrosion
FMEA Triads
Trigger: Insufficient plating thickness or poor plating quality
Failure: Increased contact resistance leading to localized heating
Mitigation: Implement strict plating thickness QC checks and corrosion testing
Trigger: Improper installation torque or alignment
Failure: Loose connections causing arcing and intermittent operation
Mitigation: Provide precise installation specifications and torque requirements
Trigger: Material incompatibility with connected components
Failure: Galvanic corrosion leading to connection failure
Mitigation: Specify compatible material combinations and protective coatings

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.1mm diameter, ±0.5mm length, contact resistance variation <10%
Test Method
ASTM B667 for contact resistance, IEC 60068-2-11 for salt spray corrosion, UL 310 for electrical safety

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the primary function of terminal pins in thermal overload protectors?

Terminal pins provide the electrical connection points that allow the thermal overload protector to monitor compressor temperature and interrupt power when dangerous overheating occurs, preventing compressor failure.

Why are terminal pins typically plated with tin or silver?

Tin or silver plating reduces oxidation, improves electrical conductivity, enhances corrosion resistance, and ensures reliable long-term connections in the humid refrigeration environment.

Can terminal pins from different manufacturers be interchanged?

While physically similar, terminal pins should only be interchanged when they meet identical electrical specifications, dimensional tolerances, and material requirements to ensure proper function and safety.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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