Page 1
SPECIFICATIONS
PRODUCT：
VARISTOR
TYPE：
GNR25D□□□
□□□□□□
□□□K
MODEL：
CITATION：
REVISION：
B01
TOTAL PAGES：
5
PAGE：
1/5
RELEASED DATE：
Feb. 06, 2002
REVISION HISTORY
NO REV. DATE DCR NO. DESCRIPTION OF CHANGE REV.
1
Feb. 06,2002
NEW RELEASE B01
2
3
4
5
6
7
8
9
10
11
12
Approved by Checked by Edited by
Yu-Chang Huang Cloud Chen Andy Chiang
Page 2
TYPE
GNR25D□□□
□□□□□□
□□□K
MODEL
PAGE 2/5
CITATION
DATE
Feb. 06, 2002
SUBJECT
QUALITY APPROVAL and STRUCTURE
REV.
B01
1. QUALITY SYSTEM APPROVAL
ISO9001 Certificate of approval No.97-HOU-AQ-1382
2. SAFETY STANDARDS APPROVAL
Standard No. UL 1449 CUL
File No. E166389 E166389
3. STRUCTURE
NO. ITEM DESCRIPTION
3.1 Main Material Zinc Oxide
3.2 Coating Material Epoxy Resin
3.3 Marking GNR, Part number, UL and CUL recognized component mark
3.4 Appearance Without dirt and crack, marking should be clear
D(max.) 27.5
H(max.) 31.0
T(max.)
＊
＊＊
＊(1)
F
12.7± 1.0
ψd1.0± 0.1
L(min.) 10.0
k(max.) 3.0
3.5 Dimensions
Unit: mm
＊＊＊＊(1) See Page 3, Dimensions Table
Page 3
TYPE
GNR25D□□□
□□□□□□
□□□K
MODEL
PAGE 3/5
CITATION
DATE
Feb. 06, 2002
SUBJECT
DIMENSIONS TABLE
REV.
B01
Part No. T
max.
25D201K 5.5
25D241K 5.7
25D271K 6.0
25D361K 6.2
25D391K 6.3
25D431K 6.5
25D471K 6.8
25D511K 7.0
25D621K 7.6
25D681K 8.3
25D751K 8.5
25D781K 8.7
25D821K 9.1
25D911K 9.6
25D102K 10.5
25D112K 10.8
25D122K 11.5
Unit:mm
Page 4
TYPE
GNR25D□□□
□□□□□□
□□□K
MODEL
PAGE 4/5
CITATION
DATE
Feb. 06, 2002
SUBJECT
ELECTRICAL CHARACTERISTICS
REV.
B01
4. ELECTRICAL CHARACTERISTICS
N0. ITEM PERFORMANCE TEST METHODS
4.0 Standard Conditions
Unless otherwise specified, all tests are made
under environmental conditions as given below:
Temperature: 5〜35℃
Relative humidity: 45〜85 % RH
4.1
Maximum Allowable
Voltage
AC : ＊＊＊＊(2) Vrms
DC : ＊＊＊＊(2) V
Maximum continuous sine wave(RMS) or DC
voltage which may be applied.
4.2 Varistor Voltage V
1mA
: ＊＊＊＊(2) V
Voltage across the varistor measured at CmA DC.
4.3
Varistor Voltage
Temperature
Coefficient
0 〜 −−−−0.05 %/℃
V
CmA
at 85℃ － V
CmA
at 25℃ 1
V
CmA
at 25℃ 60
4.4
Max. Clamping
Voltage
＊
＊＊
＊(2) V at ＊＊＊＊(2) A
Peak voltage across the varistor with a specified
peak impulse current of 8× 20μs waveform.
4.5 Rated Power ＊＊＊＊(2) W
Maximum 50〜60Hz power which may be
loaded for 1,000 hrs at 85± 2℃ with
△V
CmA
/ V
CmA
≦± 10%.
The max. current within the varistor voltage
change of less than ± 10% when one impulse
current (8× 20μs) applied.
4.6
Withstanding Surge
Current
＊
＊＊
＊(2) A
The max. current with a varistor voltage change
of less than ± 10% when two times impulse
current (8× 20μs) are applied at intervals of 5
minutes.
4.7 Energy ＊＊＊＊(2) Joule
The max. energy absorbed with a varistor voltage
change of less than ± 10% when one impulse(10
× 1000μs) is applied.
4.8 Surge Life ＊＊＊＊(2) A
The max. current with a varistor voltage change
of less than ± 10% when 10,000 times impulse
current (8× 20μs) are applied at intervals of 20
seconds at room temperature.
＊ (2) See Page 5
×
×
100
Page 5
TYPE
GNR25D□□□
□□□□□□
□□□K
MODEL
PAGE 5/5
CITATION
DATE
Feb. 06, 2002
SUBJECT
ELECTRICAL CHARACTERISTICS
REV.
B01
PART
NUMBER
MAXIMUM
ALLOWABLE
VOLTAGE
VARISTOR
VOLTAGE
CLAMPING
VOLTAGE
(MAX.)
RATED
WATTAGE
(MAX.)
SURGE
CURRENT
(8/20μμμμs)
MAXIMUM
ENERGY
(10/1000μμμμs)
SURGE
LIFE
Itm(A)
AC
rms
(V) DC(V) (V) (V) Ip(A) (W)
1 TIME 2 TIMES
Wtm(joule) (A)
25D201K 130 170 185
〜
225 340
190
25D241K 150 200 216
〜
264 395
220
25D271K 175 225 243
〜
297 455
255
25D361K 230 300 324
〜
396 595
330
25D391K 250 320 351
〜
429 650
360
25D431K 275 350 387
〜
473 710
380
25D471K 300 385 423
〜
517 775
440
25D511K 320 415 459
〜
561 845
440
25D621K 385 505 558
〜
682 1025
440
25D681K 420 560 612
〜
748 1120
460
25D751K 460 615 675
〜
825 1240
510
25D781K 485 640 702
〜
858 1290
530
25D821K 510 670 738
〜
902 1355
570
25D911K 550 745 819
〜
1001 1500
620
25D102K 625 825 900
〜
1100 1650
685
25D112K 680 895 990
〜
1210 1815
770
25D122K 750 980 1080
〜
1320 2000
150 1.0 20000 14000
800
250
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