316

General Purpose Relay

G7L

Precautions

■ Handling

• To preserve initial performance, do not drop or otherwise subject

the power relay to shock.

• The case is not designed to be removed during normal handling

and operation. Doing so may affect performance.

• Use the power relay in a dry environment free from excessive dust,

SO

• Do not allow a voltage greater than the maximum allowable coil

voltage to be applied continuously.

• Do not use the power relay outside of specified voltages and cur-

rents.

• Do not allow the ambient operating temperature to exceed the

specified limit.

■ Installation

• Although there are not specific limits on the installation site, it

should be as dry and dust-free as possible.

• PCB terminal-equipped relays weigh approximately 100 g. Be sure

that the PCB is strong enough to support them. We recommend

dual-side through-hole PCBs to reduce solder cracking from heat

stress.

• Quick-connect terminals can be connected to fast on receptacle

#250 and positive-lock connectors.

• Allow suitable slack on leads when wiring, and do not subject the

terminals to excessive force.

■ Cleaning PCB Terminals

• PCB terminals have semi-sealed construction which prevents flux

from entering the relay base. It is recommended that the user

should apply a tape seal over the vent hole prior to wave soldering

or cleaning. The tape should then be removed after processing.

■ Operating Coil

• As a rule, either a battery or a DC power supply with a maximum

5% ripple is used for the operating voltage for DC relays. Before

using a rectified AC supply, confirm that the ripple is not greater

than 5%. Ripple greater than this can lead to variations in the oper-

ating and reset voltages.

As excessive ripple can generate beats, the insertion of a

smoothing capacitor is recommended as shown below.

• When driving a transistor, check the leakage current and connect a

bleeder resistor if necessary.

• Momentary voltage drops on coil input voltage should not exceed

one second duration after contact mating with no shock or vibra-

tion.

■ Applications

• Compressors for package air conditioners and heater switching

controllers

• Switching controllers for power tools or motors

• Power controllers for water heaters

• Power controllers for dryers

• Lamp control, motor drivers, and power supply switching in copy

machines, facsimiles, and other OA equipment

• Lighting controllers

• Power controllers for packers or food processing equipment

• Magnetron control in microwaves