61857-2

Insulation:	Non-Insulated
Tongue Inside Opening:	0.197" (5.00mm)
Length - Termination:	0.350" (8.89mm)
Length - Ring Center to Termination:	0.400" (10.16mm)
Material - Insulation:	--
Insulation Diameter:	0.090" ~ 0.150" (2.29mm ~ 3.81mm)
Contact Material:	Brass
Contact Finish:	Tin
Color:	--
Features:	--
Series:	--
Wire Gauge:	14-18 AWG
Termination:	Crimp
Mounting Type:	Free Hanging (In-Line)
Length - Overall:	0.930" (23.62mm)
Width - Outer Edges:	0.375" (9.53mm)
Stud/Tab Size:	--
Terminal Type:	Standard
Part Status:	Active
Packaging:	Reel

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Introduction

A spade connector (also known as an insulated connector, a splined terminal, or a flat blade connector) is a type of electrical connector used primarily as a fastening device for joining two or more electrical wires. It is typically shaped like a spade, but with insulated portions for tight connection of the wires. Commonly used in the automotive and industrial industries, spade connectors are designed for high current and voltage applications. The 61857-2 is an important national standard in the industry, which defines the application of spade connectors and the working principle.

Application Field

The application field of the 61857-2 standard covers the design and use of insulated spade connectors. It provides the requirements and test methods for ensuring the interchangeability,quality,performance and safety of insulated spade connectors. This standard applies to insulated spade connectors with continuous current ratings up to 1500A, rated voltage up to 5kV, and with conductor sizes up to 25mm.

Design Requirements

The design of these spade connectors must comply with 61857-2. Firstly, the insulation material and overall shape of the connector should be designed so that it can resist material deterioration, abrasion, and mechanical stress due to thermal expansion or environmental effects. Furthermore, the contact between the terminal and conductor must be firm and secure, and the connection must be safe and reliable, and have good electrical conductivity. Additionally, the terminal must be able to withstand the seismic vibration and mechanical impact, so that it can be used in harsh environments.

Test Requirements

The 61857-2 requires a set of tests to be performed on spade connectors, to ensure the quality of a specific connector model. Firstly, two-point measurement of conductor resistance of the spade connector must be conducted, and the resistance must not exceed 0.05 Ohm. Secondly, the electric current withstand capability of the spade connector must be tested, and the results must be at least 1500A. Thirdly, the mechanical strength of the spade connector must be tested by bending, pushing and pulling, and the maximum mechanical force must not cause any damage to the connector. Moreover, the insulative material of the spade connector must be tested in order to ensure the insulation safety, and the withstand voltage must be at least 5kV.

Working Principle

Spade connectors consist of a spade terminal with an insulation material covering it. The insulator material provides physical protection for the terminal as well as an electrical insulation barrier between the terminal and any other conductive material. The spade terminal is made of a metal conductor, usually copper, and is shaped like a spade in order to provide a large surface area for a secure joint with a wire.The spade connector works to connect two or more wires together. First, the terminal end of the spade connector is connected to the wire, often through an electrical crimp connection or using a screw. The other end of the connector is then connected to a circuit board or another wire. When the two ends are connected to the respective circuits, the circuit is complete and the current flows between the two circuits.

Conclusion

The 61857-2 is an important national standard in the industry of spade connectors. It provides guidelines for the application, design, and testing of spade connectors. Spade connectors are widely used in automotive and industrial industries, and they are designed for high current and voltage applications. This article has discussed the application field, design requirements, test requirements and working principle of 61857-2 spade connectors.

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