F39-EU1E Omron, F39-EU1E Datasheet - Page 220

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➏ Handling Relays

➏-1 Vibration and Shock

Relays are precision components. Regardless of whether or not they

are mounted, do not exceed the rated values for vibration and shock.

The vibration and shock values are determined individually for each

Relay, so check the individual Relay specifications in this catalog.

If a Relay is subjected to abnormal vibration or shock, its original

performance capabilities will be lost.

➐ Relays for Printed Circuit

➐-1 Selecting PCBs

PCBs are classified into those made of epoxy and those made of

phenol. The following table lists the characteristics of these PCBs.

Select one, taking into account the application and cost. Epoxy PCBs

are recommended for mounting Relays to prevent the solder from

cracking.

➐-2 Selecting PCBs

The PCB may warp due to the size, mounting method, or ambient

operating temperature of the PCB or the weight of components

mounted to the PCB. Should warping occur, the internal mechanism

of the Relay on the PCB will be deformed and the Relay may not

provide its full capability. Determine the thickness of the PCB by

taking the material of the PCB into consideration.

In general, PCB thickness should be 0.8, 1.2, 1.6, or 2.0 mm. Taking

Relay terminal length into consideration, the optimum thickness is 1.6

mm.

Item

Electrical

characteristics

Mechanical

characteristics

Relative cost High

Applications

Boards (PCBs)

(1) PCB Materials

(2) PCB Thickness

Material

Glass epoxy (GE) Paper epoxy (PE)

Applications that

require high

reliability.

High insulation

resistance.

Insulation

resistance

hardly affected

by moisture

absorption.

The

dimensions are

not easily

affected by

temperature or

humidity.

Suitable for

through-hole or

multi-layer

PCBs.

http://www.ia.omron.com/

Terminal length

Epoxy

Characteristics

between glass

epoxy and phenol

Characteristics

between glass

epoxy and phenol

Moderate

Characteristics

between glass

epoxy and paper

phenol

New PCBs are

highly insulation-

resistive but easily

affected by

moisture

absorption.

Low

Applications in

comparatively

good

environments with

low-density wiring.

Paper phenol

The

dimensions are

easily affected

by temperature

or humidity.

Not suitable for

through-hole

PCBs.

Phenol

(PP)

➏-2 Dropped Products

Do not use a product that has been dropped, or that has been taken

apart. Not only may its characteristics not be satisfied, but it may be

susceptible to damage or burning.

➐-3 Selecting PCBs

Refer to the following table to select the terminal hole and land

diameters based on the Relay mounting dimensions. The land

diameter may be smaller if the land is processed with through-hole

plating.

➐-4 Mounting Space

➀ Ambient Temperature

When mounting a Relay, check this catalog for the specified amount

of mounting space for that Relay, and be sure to allow at least that

much space.

When two or more Relays are mounted, their interaction may

generate excessive heat. In addition, if multiple PCBs with Relays are

mounted to a rack, the temperature may rise excessively. When

mounting Relays, leave enough space so that heat will not build up,

and so that the Relays' ambient temperature remains within the

specified operating temperature range.

➁ Mutual Magnetic Interference

When two or more Relays are mounted, Relay characteristics may be

changed by interference from the magnetic fields generated by the

individual Relays. Be sure to conduct tests using the actual devices.

➐-5 Pattern Design for Noise Countermeasures

➀ Noise from Coils

When the coil is turned OFF, reverse power is generated to both ends

of the coil and a noise spike occurs. As a countermeasure, connect a

surge absorbing diode. The diagram below shows an example of a

circuit for reducing noise propagation.

Nominal value

Terminal hole diameter (mm)

(3) Terminal Hole and Land Diameters

0.6

0.8

1.0

1.2

1.3

1.5

1.6

2.0

Noise is superimposed

on the power supply line,

so a separate pattern is

connected from a

smoothing capacitor to

supply coil power.

Smoothing

capacitor

Tolerance

±0.1

Relay drive transistor

The pattern will

form an antenna

circuit, so make

it as short as

possible.

Precautions for All Relays

Minimum land diameter (mm)

Power supply line

1.5

1.8

2.0

2.5

3.0

C-11

F39-EU1E Omron, F39-EU1E Datasheet - Page 220

F39-EU1E

Specifications of F39-EU1E

Related parts for F39-EU1E