GF
Series
Metal Oxide
Varistor
Built-in
Thermal Fuse
General Purpose
85 C
Maximum
Temperature
Actual
Size
The GF series are general purpose metal oxide varistors from UCC/NCC that include a built-in
thermal fuse. The values available for the GF series varistors are versions of the general purpose G
series that have a designed-in thermal fuse. This added thermal fuse allows the GF series varistors to
handle higher peak currents than the standard G series varistors. Designed for use within a voltage
range of 175 to 510VAC makes the GF varistors suitable for various applications.
Refer to the Mini -Glossary at the end of the metal oxide varistors section for additional technical
information and specifications.
Summary of Specifications
Radial lead terminals.
Operating temperature range: 40 C to 85 C.
Maximum voltage range: 175 to 510VAC or 225 to 670VDC.
Standard varistor voltage tolerance: 10%
Maximum energy: 50 to 190 J depending on case size.
Maximum surge current: 2,500 to 4,000A.
Maximum case size (D H T ): 17.0 20.0 10.0mm and 25.0 32.0 10.0mm.
METAL OXIDE VARISTOR
GF
United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com
153
GF Series
GF Specifications
Item
Operating Temperature Range
Storage Temperature Range
Maximum Voltage Range
Varistor Voltage
Varistor Voltage Tolerance
Maximum Energy
Maximum Surge Current
Maximum Case Size ( D H T )
40 to
85 C
Characteristics
50 to 125 C
175 to 510VAC or 225 to 670VDC
270 to 820V at 1mA DC
10% ( K )
0.4 to 230 Joules at 2ms
2,500 to 4,000A at 8 /20 s
17.0
20.0 10.0mm and 25.0
32.0 10mm
Diagram of Dimensions
Metal Oxide Varistor/Radial Lead
W
Max.
Unit: mm and inches
Ø
D
Max.
T
Max.
H
Max.
L
2
Min.
L
1
Min.
TNR
Ø
d
2
1
Ø
d
1
2
F
3
1
2
3
Dimensions (mm)
Nominal
Diameter
15
mm
23
mm
Ø
D
max.
H
max.
20.0
32.0
T
max.
10.0
10.0
W
max.
23.0
28.0
F
1.0
7.5
10.0
L
1
min.
30.0
30.0
L
2
min.
22.0
22.0
Ø
d
1
Ø
d
2
17.0
25.0
0.8
0.8
0.6
0.6
Dimensions (inches)
Nominal
Diameter
15
mm
23
mm
Ø
D
max.
H
max.
0.787
1.260
T
max.
0.394
0.394
W
max.
0.906
1.102
F
0.039
0.295
0.394
L
1
min.
1.181
1.181
L
2
min.
0.866
0.866
Ø
d
1
Ø
d
2
0.669
0.984
0.031
0.031
0.024
0.024
Part Numbering System for GF Series
METAL OXIDE VARISTOR
TNR
15
GF
271
K
When ordering, always specify complete catalog number for GF Series.
Varistor Voltage Tolerance: K = 10%
Nominal Varistor Voltage: Expressed in volts. The first two digits are
significant figures, and the third digit indicates the number of zeros
following these figures ( e.g. 270 = 27 V; 271 = 270V ).
Series Name: Indicates Basic Varistor Style.
Nominal Case Diameter: 15 =
Ø
15mm; 23 =
Ø
23mm.
TNR: Alpha Prefix for Varistors.
GF
154
United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com
GF Series
Varistor Standard Ratings - Radial Lead
Nom.
Case
Dia.
Catalog
Part
Number
Maximum
Applied Voltage
(Continuous)
VAC
rms
VDC
175
300
510
175
300
510
225
385
670
225
385
670
Maximum
Peak Current
(8/20µsec.)
(A)
2,500
2,500
2,500
4,000
4,000
4,000
Maximum
Energy
(2msec.)
(J )
50
80
110
90
150
190
Rated
Wattage
(W)
0.6
0.6
0.6
0.8
1.0
1.5
Maximum
Clamping
Voltage
(A)
(V)
50
50
50
100
100
100
440
765
1,340
440
765
1,340
Capacitance
(typical)
at 1kHz
( pF )
680
450
280
1,850
1,200
800
Varistor
Voltage at
1mA DC
( V 10%)
270
470
820
270
470
820
Ø
15
mm
TNR15GF271K
TNR15GF471K
TNR15GF821K
TNR23GF271K
TNR23GF471K
TNR23GF821K
Ø
23
mm
Varistor Volt - Ampere and Pulse Lifetime Characteristics
V- I Curve
-15mm Nominal Diameter
TNR15GF271K~TNR15GF821K
Max. Leakage Current
Voltage (V)
5000
4000
3000
15G821K
Pulse Lifetime Ratings
-15mm Nominal Diameter
at +20°C
TNR15GF271K~TNR15GF821K
Peak Pulse Current (A)
7000
5000
3000
2000
1000
700
500
300
200
100
70
50
30
20
10
7
5
3
2
10
1
10
2
10
3
10
4
10
5
10
6
Max. Clamping Voltage
1 Time
2
Test Condition Interval:
1~10
1
times: 2 min.
10
2
~10
6
times: 10 sec.
2000
1500
1000
800
700
600
500
400
300
200
150
100
80
70
60
50
40
30
10
6
15G471K
15G271K
10
5
10
4
10
3
10
2
10
1
10
0
10
1
10
2
10
3
2,500A Max.
10
4
20
100
Direct Current (A)
8/20
µsec.
Impulse Current (A)
200
1k
Impulse Duration (µs)
2k
10k
V- I Curve
- 23mm Nominal Diameter
TNR23GF271K~TNR23GF821K
Max. Leakage Current
Voltage (V)
5000
4000
3000
23G821K
Pulse Lifetime Ratings
-23mm Nominal Diameter
at +20°C
TNR23GF271K~TNR23GF821K
Peak Pulse Current (A)
7000
5000
3000
2000
1000
700
500
300
200
100
70
50
30
20
10
7
5
3
2
10
1
10
2
10
3
10
4
10
5
10
6
Max. Clamping Voltage
1 Time
2
Test Condition Interval:
1~10
1
times: 2 min.
10
2
~10
6
times: 10 sec.
2000
1500
1000
800
700
600
500
400
300
200
150
100
80
70
60
50
40
30
10
6
23G471K
23G271K
METAL OXIDE VARISTOR
4,000A Max.
GF
10
5
10
4
10
3
10
2
10
1
10
0
10
1
10
2
10
3
10
4
20
100
Direct Current (A)
8/20
µsec.
Impulse Current (A)
200
1k
Impulse Duration (µs)
2k
10k
United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com
155
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