Panasonic ASCT1F46E manual What is a Surface Mount Relay? 1. From IMT to SMT, Features and Effects

15

15.PCB mounting

2. SMD type

To meet the market demand for downsizing to smaller, lighter, and thinner products, PC boards also need to proceed from insertion mounting to surface mounting technology.

To meet this need, we offer a line of surface mount relays. The following describes some cautions required for surface mount relay installation to prevent malfunction and incorrect operation.

*Please contact us for or reflow soldering of through-hole terminal type.

1.What is a Surface Mount Relay?

1.From IMT to SMT

Conventional insertion mount technology (IMT) with some 30 years of history is now being replaced with surface mount technology (SMT).

Solid-state components such as resistors, ICs, and diodes can withstand high heat stresses from reflow soldering because they use no mechanical parts. In contrast, the conventional electro-mechanical relays consisting of solenoid coils, springs, and armatures are very sensitive to thermal stress from reflow soldering.

We applied the experience gained from our advanced relay technologies to produce high-performance electromagnetic relays compatible with surface mount technologies such as IRS and VPS.

Insertion Mount Technology & Surface Mount Technology

	Insertion	Components' terminals are inserted into terminal
	Mounting
		holes of PC board and are soldered to copper pads
	Technology
		on the other side of the board. (flow-soldering)
	(IMT)
	Surface	Components are placed on copper pads pre-coated
	Mounting
		with paste solder and the board assembly is heated to
	Technology
		solder the components on the pads. (reflow soldering)
	(SMT)
2. Features and Effects
		Features

Allows high density mounting

Components can be installed on both sides of a board

Ceramic PC boards can be used

Compatible with automatic placement by robots

Drilling for lead holes is not required

Compact system designs are possible due to high density mounting

High heat resistance

Anti-gas measures

The surface mount relay is realized with the following advanced technologies:

•Heat-resistance encapsulation technique

•Gas analysis

•Reliability assessment

•Precision molding technique for heat-resistant materials

Chip resistor

Effects

System downsizing

Overall cost reduction

High reliability