The respective characteristics of the power spring terminal and power connector

1. Definition of current carrying capacity (current magnitude) for power and signal spring terminals

The influence of temperature in power supply applications

Definition of rated current of connectors

Provisions on temperature rise of connectors in various testing standards

The controversy surrounding the allowable temperature rise of connectors

The impact of testing methods on the temperature rise of connectors

The impact of connector status on current carrying capacity testing

Three influencing factors for testing the current carrying capacity of connectors

(1) Overview of connector temperature rise

The balance between heat generation and heat dissipation in connectors

The generation of heat from connectors

There are three ways for connectors to dissipate heat

Thermal radiation

Heat convection

Heat conduction

(2) The generation of connector heat and body resistance

The specific resistance requirements for the power supply spring terminal and signal spring terminal

How to calculate the resistance of the spring terminal body

(3) The generation of heat in connectors and local superheat at interfaces

Resistance heat at the connector interface

How is the local ultra-high temperature generated at the connector interface

The calculation formula for local ultra-high temperature at the connector interface

The local ultra-high temperature characteristics of the connector interface

The harm of local ultra-high temperature at the connector interface

Continuous current and instantaneous current of 3 connectors

Continuous current; Instantaneous current; Overload current

The loading process of current

Determination of instantaneous current

The quantitative relationship between the instantaneous current of common coatings and the contact resistance of connectors

Quantitative relationship between connector overload current, overload time, and rated current

Design standards for power supply spring terminals

(1) Local ultra-high temperature standards

Four local ultra-high temperature standards

Source of local ultra-high temperature standards/curve relationship between local ultra-high temperature and contact voltage

(2) The relationship between local ultra-high temperature standards and contact resistance

The quantitative relationship between the separation interface, permanent connection interface, and contact resistance and current at the end of product life derived from local ultra-high temperature standards

Discussion on the quantitative relationship between the contact resistance of the power supply spring terminal and the current

(3) Consideration of the resistance of the spring terminal body

Reduce the resistance of the spring terminal body

How to choose copper (alloy) to reduce the resistance of spring terminal body and improve heat dissipation ability

Calculation of body resistance

(4) Consideration of connector contact resistance

How to reduce contact resistance through multi contact contact of power supply spring terminals

How to improve contact reliability of power supply spring terminal with multiple contacts

The multi contact contact of the power spring terminal enhances the insertion and extraction life

5. Distribution of current

(1) Dedicated power spring terminal

Size limit for dedicated power supply spring terminals

The connection requirements for dedicated power supply spring terminals have been increased

Simplified analysis of dedicated power supply spring terminals

The influence of the size of wire conductors on the rated current of connectors

The effect of environmental temperature on the rated current of connectors/derating current/derating curve

The effect of increasing the heat dissipation area on the rated current of the connector

(2) Parallel multi terminal applications

The advantages of parallel multi terminal applications

(3) Parallel connection