For other Voltage, Power, or Tolerance Consult Factory.
TX, TXV, and S-Level Screening
Available~.
Replacement for IN4954 - IN4996
DIM
A
B
C (L Axial)
C (K
Axial)
D
MIN.
.047"
.038"
1.00"
MAX
.158"
.185"
.053"
.042"
Part Number/Ordering Information
~
SZN
L
Screening
~
l
AXIAL (K & L)
All dimensions are prior to soldering
= Not Screened
TX =TXLevel
TXV=TXV
S = S Level
Package Type
§!
L = Axial Leaded
SMS = Surface Mount Square Tab
K =
40
Mil Lead Diameter
Device / Voltage
4954 - 4996
DIM
MIN.
.155"
.190"
.023"
Body to Tab Clearance:
.001"
c
A
B
D
MAX.
.185"
.220"
.027"
SQUARE TAB (SMS)
All dimensions are prior to soldering
Maximum Ratings
Symbol
SZN4954-4996
Units
Nominal Zener Voltage
Continuous Power
@
65°C
Operating and Storage Temp.
Thermal Resistance
Junction to Lead, L=3/8" (Axial)
Vz
Po
Top,Tstg
L - axial
K· axial
ReJL
6.8 - 390
5
-65
to
+175
22
25
7
V
W
°C
°CIW
°CIW
Thermal Resistance
Junction to End Cap (SMS)
ReJE
NOTE: All specifications are subject to change without notification.
SCD's for these devices should be reviewed b SSDI rior to release.
DATA SHEET
#:
ZOOOlOB
~:sD11
14701 Firestone Blvd
*
La
Mirada, Ca 90638
Phone: (562) 404-4474
*
Fax: (562) 404-1773
ssdi@ssdi- ower.corn
*
www.ssdi- ower.corn
Solid State Devices, Inc.
SZN4954 thru SZN4996
Elcdl"ical Characteristics
Vz
PART
NUMBER
@
IZ(I)
(II
25 (' (
l
lnlcxs
Otherw ise
Specified)
I
ZK
Test
Current
Vz
@
IZ(1)
Vz
@
IZ(I)
Iz(l)
Test
Current
Zz
Imp.
@
IZ(1)
ZZK
Knee
Imp.
@
IZK
Iz
Max de
Vz(reg)
I
zsM
@ 10to
50% of
Iz
V
R
Test
Voltage
I
R
Reverse
Current
@
Vr
Max
OOVZ
I
R
Reverse
Current
+150
°C
Max
itA
750
500
300
200
200
150
150
150
100
100
100
100
Current
Peak
Surge
Temp.
Coeff.
@
IZ(l)
Max
Max
Nom
Min
Max
--
mA
175
175
150
150
125
125
100
100
75
75
65
65
Max
Max
--
rnA
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Rating
Max
Rating
--
V
5.2
5.7
6.2
6.9
7.6
8.4
9.1
9.9
11.4
12.2
13.7
15.2
V
SZN4954
SZN4955
SZN4956
SZN4957
SZN4958
SZN4959
SZN4960
SZN4961
SZN4962
SZN4963
SZN4964
SZN4965
6.8
7.5
8.2
9.1
10.0
11.0
12.0
13.0
15
16
18
20
V
V
7.14
7.87
8.61
9.55
10.50
11.55
12.60
13.65
15.75
16.80
18.90
21.00
o
1
1.5
1.5
2
2
2.5
2.5
3
3.5
3.5
4.0
4.5
o
450
409
371
338
307
322
338
344
351
358
365
373
mA
700
630
580
520
475
430
395
365
315
294
264
237
V
0.7
0.7
0.7
0.7
0.8
0.8
0.8
0.9
1.0
1.1
1.2
1.5
A
29.3
26.4
24
22
20
19
18
16
12
10
9.0
8.0
IJA
150
100
50
25
25
10
10
10
5.0
5.0
5.0
2.0
«t-c
.05
.06
6.46
7.13
7.79
8.65
9.50
10.45
11.40
12.35
14.25
15.20
17.10
19.00
.06
.06
.07
.07
.07
.08
.08
.08
.085
.085
SZN4966
SZN4967
SZN4968
SZN4969
SZN4970
22
24
27
30
33
20.90
22.8
25.7
28.5
31.4
23.10
25.2
28.3
31.5
34.6
50
50
50
40
40
5.0
5
6
8
10
380
388
396
403
412
1.0
1.0
1.0
1.0
1.0
216
198
176
158
144
1.8
2.0
2.0
2.5
2.8
7.0
6.5
6.0
5.5
5.0
16.7
18.2
20.6
22.8
25.1
2.0
2.0
2.0
2.0
2.0
.085
.09
.09
.09
.095
100
100
100
100
100
SZN4971
SZN4972
SZN4973
SZN4974
SZN4975
SZN4976
SZN4977
SZN4978
SZN4979
SZN4980
SZN4981
SZN4982
SZN4983
SZN4984
SZN4985
SZN4986
SZN4987
SZN4988
SZN4989
SZN4990
36
39
43
47
51
56
62
68
75
82
91
100
110
120
130
150
160
180
200
220
34.2
37.1
40.9
44.7
48.5
53.2
58.9
64.6
71.3
77.9
86.5
95.0
104.5
114.0
123.5
142.5
152
171
190
209
37.8
40.9
45.1
49.3
53.5
58.8
65.1
71.4
78.7
86.1
95.5
105
115.5
126.0
136.5
157.5
168
189
210
231
30
30
30
25
25
20
20
20
20
15
15
12
12
10
10
8
8
5
5
5
11
14
20
25
27
35
42
50
55
80
90
110
125
170
190
330
350
450
500
550
420
428
437
445
473
560
700
750
800
850
900
950
1000
1050
1100
1150
1200
1250
1300
1333
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
132
122
110
100
92
84
76
70
63
58
52.5
47.5
43
39.5
36.6
31.6
29.4
26.4
23.6
21.6
3.0
3.0
3.3
3.5
4.0
4.4
5.0
5.5
6.0
6.6
7.5
8.0
9.0
10
11
13
14
16
18
19
4.5
4.0
3.5
3.2
3.0
2.8
2.5
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.75
0.70
0.60
0.50
0.50
27.4
29.7
32.7
35.8
38.8
42.6
47.1
51.7
56
62.2
69.2
76.0
83.6
91.2
98.8
114.0
121.6
136.8
152.0
167.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
.095
.095
.095
.095
.095
.095
.100
.100
.100
.100
.100
.100
.100
.100
.105
.105
.105
.110
.110
.115
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
NOTE: All specifications are subject to change without notification.
SCD's for these devices should be reviewed b SSDl rior to release.
DATA SHEET
#:
ZOOOlOB
ss
14701 Firestone Blvd
*
La
Mirada, Ca 90638
Phone: (562) 404-4474
*
Fax: (562) 404-1773
ssdi@ssdi wer.com
*
www.ssdi-ower.com
II
Devices, Inc.
Solid State
Vz
PART
NUMBER
@ IZ(I)
SZN4954 thru SZN4996
Electrical Chaructcrixtics
Vz
@ IZ(I)
(0
1S C
(l
;nlcss Other» isc Specified)
I
ZK
Test
Current
Vz
@ IZ(I)
I
z
(I)
Test
Current
Zz
Imp.
@ IZ(l1
ZZK
Knee
Imp.
@I
ZK
I
z
Maxdc
Current
Vz(reg)
I
zsM
@ 10 to
50% of
lz
Max
V
R
Test
Voltage
I
R
Reverse
Current
@
Vr
Max
OOVZ
I
R
Reverse
Current
+150
DC
Max
IlA
Peak
Surge
Temp.
Coeff.
@ IZ
(1)
Nom
Min
Max
--
rnA
Max
Max
--
rnA
Rating
Max
Rating
--
V
Max
%/DC
V
V
V
n
650
800
950
1,175
1,400
1,800
n
1367
1400
1433
1467
1533
1667
rnA
V
A
IJA
2.0
2.0
2.0
2.0
2.0
2.0
SZN4991
SZN4992
SZN4993i'
SZN4994i'
SZN4995i'
SZN4996i'
240
270
300
330
360
390
228
257
285
314
342
371
252
283
315
346
378
409
5
5
4
4
3
3
1.0
1.0
1.0
1.0
1.0
1.0
19.8
17.5
15.6
14.4
13.0
12.0
22
25
28
32
35
40
0.40
0.35
0.30
0.25
0.22
0.20
182.0
206.0
228.0
251.0
274.0
297.0
.115
.120
.120
.120
.120
.120
100
100
100
100
100
100
NOTES:
1/
All zener voltages are measured with an automated test set using a 10 - 50 msec test time. Longer or shorter test time will have a corresponding effect on the measured
value due to heating effects.
2/ Zener impedance is derived from the AC voltage divided by the AC current with RMS value of 10% of DC zener test current superimposed on the test current.
3/ SSDI standard marking consists of a contrasting color cathode dot or band. Part number information is included on packaging labels.
4/ For Ordering Information, Price, and Availability- Contact Factory.
5/ Screening based on MIL-PRF-195oo. Screening flows available on request.
6/ Suffix"" for Axial and "SMS" for Square Tab Surface Mount.
7/ For tighter tolerances, consult the factory.
8/ Figures shown are for a peak sinusoidal surge current of 8.3 msec duration, repeated a maximum of I surge per minute.
9/ Contact factory for availability
NOTE: All specifications are subject to change without notification.
C++ 属于面向对象的编程语言，OOP的思想不必多说，特别对于复杂的软件工程来说，利用OOP绝对是事半功倍，相对于传统的C来说； 当然用C来写单片机程序无可厚非，已经延续了一个传统，从大学时学的开始到工作岗位，好多人都是一直用C来做，但是既然Keil支持C++编译， 可以用C++来编写你的代码，可以利用高级语言来结构化，清晰化你的程序，为嘛不用呢！哈哈，个人看法！下面进入正题： C+...[详细]
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