What Is a Relay?

As the name indicates, a relay is a mechanism for relaying electric power. They can roughly be sorted into contact relays (mechanical relays) and non-contact relays (MOS FET relays, solid state relays). SUMIKASUPER LCP is mainly used for mechanical relays. A mechanical relay is comprised of a coil (electromagnet) and a switch (contact). When an electric current is applied to the coil, a magnetic force (electromagnet) is generated, and the switch is turned ON/OFF via that force. Relays are used for a wide range of applications from large machines such as automobiles and industrial robots to small devices such as OA equipment and home appliances that we use everyday.

Characteristics Required of the Material

Relays generally require high heat resistance (rigidity and strength at high temperatures and reflow resistance), low gas emission, low dust generation, and high dielectric strength. SUMIKASUPER LCP meets these characteristics. The best grade can be selected according to the heat resistance required for the relay and the thin-wall flowability needed for molding.

Grade Selection Guide for Relay Applications

The following are suitable grades of SUMIKASUPER LCP for relays that have these required characteristics. The high heat resistant grade E6008 and ultra-high heat resistant grade E4008 are best for relays. E5008 is recommended when more heat resistance is required. E6807LHF is recommended for thin relays requiring high flowability.

Table 6-6-1 Grades of SUMIKASUPER LCP for Relay Applications

Relay type		Required resistance	Recommended grade
For cover	Encapsulation type	Special high heat resistance	E5008, E5008L etc.
		Ultra-high heat resistance	E4008 etc.
	Open type	Ultra-high heat resistance	E4008 etc.
		High heat resistance	E6008 etc.
		High flow	E6807LHF etc.
For base		Ultra-high heat resistance	E4008 etc.
		High heat resistance	E6008 etc.
		High flow	E6807LHF etc.
For coil encapsulation		High heat resistance	E6008, E6807T etc.