SVC821D-10A データシートの表示（PDF） - Unspecified

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SVC821D-10A

CERAMIC SURGE ABSORBERS (VARISTORS)

Unspecified 

CERAMIC SURGE ABSORBERS (VARISTORS)

SVC

APPLICATIONS

The protection of semiconducting elements such as diodes,

thyristors, transistors, IC and relays against transient voltages.

Similar protection of many types of measuring instruments,

control machinery and communication equipment and broadcasting

equipment against inductive lightning and switching surges.

Protection of general purpose electrical equipment, domestic

mechinery and appliances. TV and radios and similar consumer

products against lightning and switching surges.

■ Power supply circuit protection

Line circuit

Varistor voltage selection table (ZL)

Power supply voltage

100V AC

200V AC

12V DC

24V DC

Type

SVC201D-□□A

SVC221D-□□A

SVC241D-□□A

SVC271D-□□A

SVC391D-□□A

SVC431D-□□A

SVC471D-□□A

SVC220D-□□B

SVC390D-□□B

Notes :

①The power supply voltage must not exceed the maximum

allowable circuit voltage.

②Since independent wiring loads and capacitive loads cause the

voltage build-up at the time of opening or closing the load, use SVC

having a varistor voltage as high as possible.( mark)

③The bold faced portions of the type letters vary.

AC/DC single-phase circuit

AC three-phase circuit

■ Telecommunication circuit protection

Varistor voltage selection guied

Power supply voltage

12V DC

24V AC

Type

SVC180D-□□B

SVC220D-□□B

SVC820D-□□A

SVC390D-□□B

SVC820D-□□A

Notes :

The varistor SVC has a capacitance value. Take not of this when

applying them to high-frequency signal circuits.

■ Switching circuit protection

Protection of relay

(Contact coil)

Protection of

semiconductors

Line and groud circuit

Varistor voltage selection table (ZE)

Power supply voltage

100V AC

200V AC

Type

SVC431D-□□A

SVC471D-□□A

SVC751D-□□A to SVC 112D-□□A

SVC182D-□□A

Notes :

①When subjected to megger testing (500V DC), the insulation

resistance value can decrease due to the leakage current of the

SVC, To avoid this remove the varistor or use marked SVC.

②When subjected to dielectric strength test(1000V AC). remove the

SVC or use marked SVC.

Select varistors taking a note of operating conditions peculiar to the

equipment.

AC/DC single-phase circuit

AC three-phase circuit

Varistor voltage selection guide

Power supply voltage

12V DC

24V DC

100V DC

100V AC

Type

SVC220D-□□B

SVC390D-□□B

SVC151D-□□A

SVC201D-□□A

SVC221D-□□A

SVC241D-□□A

SVC271D-□□A

Notes :

①The power supply voltage must not exceed the maximum

allowable circuit voltage of the SVC

②Pay due attention to the surge energy generated by the load.

③Select SVC referring to the pulse lifetime rating.

④To further reduce the tendency of sparking across the contacts

connect a capacitor parallel with the SVC. This will also protect the

equipment from electromagnetic wave jamming.

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