Fuji Electric FJ Series - Coil Surge Suppression Units

(Photo No.KKD06-021)
SZ-Z4-C
 Features
• The surge voltage generated when the suppression coil is
turned off prevents malfunction of the electronic circuit.
• The mounting can be carried out easily just by connecting the
connection terminals to the coil terminals.
(1) Built-in varistor……Cutting off the peak surge voltage.
(2) Built-in CR…… Suppressing the abrupt rise in the surge
voltage.
 Types and ratings
 Coil-surge suppression unit
Coil-surge suppression unit
 Ordering information
z Coil-surge suppression unit
SZ-Z35-C
(1) Type
Product name
Coil-surge
absorption unit
Surge absorption
element
varistor
CR
Varistor
CR
Control coil
applicable voltage range
AC/DC24-48V
AC/DC100-250V
AC380-440V
AC/DC24-48V
AC/DC100-250V
AC/DC24-48V
AC/DC100-250V
AC380-440V
AC24-48V
AC100-250V
Specifications
Varistor voltage 100V
Varistor voltage 470V
Varistor voltage 910V
0.22µF, 22Ω
0.1µF, 220Ω
Varistor voltage 100V
Varistor voltage 470V
Varistor voltage 910V
0.47µF, 100Ω
0.22µF, 470Ω
Applicable type frame
AC-operated type
FJ-B18,B25 ,B32
FJ-B40 -B95
DC-operated type
FJ-B18/G,B25/G,B32/G
—
FJ-B18/G,B25/G,B32/G
—
Type
SZ-Z1-C
SZ-Z2-C
SZ-Z3-C
SZ-Z4-C
SZ-Z5-C
SZ-Z31-C
SZ-Z32-C
SZ-Z33-C
SZ-Z34-C
SZ-Z35-C
Type
No surge absorption
unit
Built-in varistor
Built-in CR
Coil-surge absorption property (AC200V coil)
FJ-B18
(0.1ms/div, 1kV/div)(CP-487)
FJ-B18＋SZ-Z2-C
(2ms/div, 200V/div)(CP-489)
FJ-B18＋SZ-Z5-C
(2ms/div, 200V/div)(CP-488)
Applicable
The current will change abruptly when the coil is turned
off. And a very high surge voltage will be generated due
to the coil inductance and will cause interference to the
surrounding electronic equipment, and thereby result in
circuit malfunction or damage to the circuit.
When the surge voltage exceeds a certain range, the
current will flow to the varistor that is connected in
parallel with the coil and play the role of suppressing
the peak surge voltage. Used for AC and DC circuits.
Suppressing the surge voltage, i.e., the voltage of the
varistor.
The CR circuit (capacitor and resistor series circuit)
that is connected in parallel with the coil reduces the
frequency of the surge voltage, and suppresses an
abrupt rise in the surge voltage (dv/dtproperty）. Used
for AC and DC circuits.
Information subject to change without notice
32
Contactors and Thermal Overload Relays