4

G9KA

PCB Power Relays

G

9

K

A

Precautions

 Refer to PCB Relays Common Precautions for general precautions.

As this relay is a high-voltage and high-current type,

there is a risk of abnormal heat generation, smoke

generation or fire if you use the relay with a contact

voltage, current, or for a number of times beyond the

specified range. Use only within the specified ranges.

If the power is switched on when the connections

are insufficient, there is a risk of abnormal heat

generation. Do not connect and use probes and

sockets on individual relays.

If the power is switched on when the connections

are insufficient, there is a risk of abnormal heat

generation. Please install and use relays under

recommended conditions.

Drop

• Do not use relays that have been dropped as they may not

function properly.

 Coil Voltage Reduction (holding voltage) after Relay

Operation

• Use this relay with coil voltage reduction.

• Apply the rated voltage for 0.1 to 3 seconds to the coil first.

• The range of coil rated voltage must be set as 100 to 120%,

and holding voltage must be 45 to 60%. Do not exceed the

ranges due to the change of coil voltage change and so on.

*

The coil resistances were measured at a coil temperature of 23°C with

tolerances of ± 10%.

Diode Connection for Operating Coil

• Connect diode and zener diode (or varistor) to the coil (refer to

the picture below).

Diode is for coil surge absorption. Ensure to include zener

diode as there is a possibility of any influence for switching

capability when only using diodes.

• Coil has no polarity. Connect the diodes in the reverse polarity

of the voltage applied to the coil.

• The recommended zener diode voltage is 3 times that of the

rated coil voltage.

• Use diodes with reverse dielectric strength 10 times or more

that of coil rated voltage, and with forward current more than

coil rated current.

PCB Terminal Soldering

• Solder at 290°C for 20 seconds (max.) in soldering bath.

• It is not possible to wash relay as this is not fully sealed type.

Assembly

• To reduce the risk of specification deterioration, assemble

relays in a dust free, low humidity and non-corrosive gas

environment.

• Using the relay under high temperature, high humidity, or

harmful gas may deteriorate its performance characteristics

due to condensation or corrosive materials, resulting in failure

or burn damage to the relay.

• This product weight is about 220 g. Be careful of the strength

of PCB. To reduce soldering crack due to heat stress, use both

sides through hole PCB.

Electrical Endurance

• This relay's electrical endurance specification is based on our

company's standard test procedure with resistive loads.

Relays intended for use with remove; types of drive circuits

PWM, capacitive, resistive dropper etc.), types of loads (e.g.

capacitive or inductive), and switching cycles (duty and

operation timing) must be tested to confirm suitability to the

actual intended application.

• The final failure mode is failure to break the circuit. In such a

case, burning may extend to surrounding components.

Implement safety circuits and other measures to minimize the

risk of mechanical failure.

Micro Load

• This is a power relay for high power switching. Do not use for

micro loads such as signal switching.

Warning

Precautions for Safe Use

Precautions for Correct Use

Applied coil

voltage

Coil

resistance *

Coil power consumption

Rated voltage

100 to 120%

28.8

Ω (DC12)

115.2

Ω (DC24)

Approx. 5 to 7.2 W

Holding voltage

45 to 60%

Approx. 1.0 to 1.8 W

100 to 120%

45 to 60%

(Holding voltage)

0.1 to 3 seconds

(Rated voltage)

Relay coil

Diode

Zenner diode