NTE4902 thru NTE4998
Surge Clamping, Transient Overvoltage Suppressor
Unidirectional
Description:
The NTE4900 series of silicon Transient Suppressors designed to protect voltage sensitive compo-
nents from high energy voltage transients. Transient over voltage suppressor devices have become
very important as a consequence of their high surge capability, extremely fast response time, and low
incremental surge resistance (Rs).
Application:
The NTE4900 series has a peak pulse power rating of 1500 watts for one millisecond can protect inte-
grated circuits, hybrids, CMOS, MOS, and other voltage sensitive components in a broad range of
applications such as telecommunications, power supplies, computers, automotive, industrial, and
medical equipment.
Absolute Maximum Ratings:
Peak Pulse Power Dissipation (T
A
= +25°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500W
t
clamping
(0 volts to BV Min) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
<
1 x 10–12 sec
Operating and Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +175°C
Forward Surge Rating 200 Amps, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/20 Second at +25°C
Steady State Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 W @ T1 = +25°C
Electrical Characteristics:
Clamping Factor: 1.33 @ full rated power
1.20 @ 50% rated power
The clamping factor is defined as: The ratio of the actual V
C
(Clamping voltage) to the actual BV
(Breakdown Voltage) as measured on a specific device.
Maximum Ratings
NTE Type
Number
Diagram
Number
Maximum Reverse
Stand Off Voltage
(Volts)
V
R
Min
Breakdown Voltage @ I
T
(Volts)
V
BR
Typ
Max
I
T
mA
Clamping Voltage
@ I
pp
(1msec)
(Volts)
V
C
Reverse Leakage
Current @ V
R
(µA)
I
R
Peak Pulse
Current
(Amps)
I
pp
Temperature
Coefficient
of BV%/°C
4902
4904
4906
4910
4914
4918
183
183
183
183
183
183
5.80
6.40
7.02
8.55
10.20
11.10
6.45
7.13
7.79
9.50
11.40
12.40
6.80
7.50
8.20
10.00
12.00
13.00
7.14
7.88
8.61
10.50
12.60
13.70
10.0
10.0
10.0
1.0
1.0
1.0
10.5
11.3
12.1
14.5
16.7
18.2
1000.0
500.0
200.0
10.0
5.0
5.0
143.00
132.00
124.00
103.00
90.00
82.00
0.057
0.061
0.065
0.073
0.078
0.081
Electrical Characteristics (Cont’d):
Clamping Factor: 1.33 @ full rated power
1.20 @ 50% rated power
The clamping factor is defined as: The ratio of the actual V
C
(Clamping voltage) to the actual BV
(Breakdown Voltage) as measured on a specific device.
Maximum Ratings
NTE Type
Number
Diagram
Number
Maximum Reverse
Stand Off Voltage
(Volts)
V
R
Min
Breakdown Voltage @ I
T
(Volts)
V
BR
Typ
Max
I
T
mA
Clamping Voltage
@ I
pp
(1msec)
(Volts)
V
C
Reverse Leakage
Current @ V
R
(µA)
I
R
Peak Pulse
Current
(Amps)
I
pp
Temperature
Coefficient
of BV%/°C
4920
4922
4926
4928
4932
4934
4936
4938
4940
4942
4944
4946
4950
4952
4954
4958
4960
4962
4964
4966
4968
4970
4972
4974
4976
4978
4980
4982
4984
4988
4990
4992
4994
4996
4998
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
183
12.80
13.60
15.30
17.10
20.50
23.10
25.60
28.20
30.80
33.30
36.80
40.20
43.60
47.80
53.00
58.10
64.10
70.10
77.80
85.50
94.00
102.00
111.00
121.00
136.00
145.00
154.00
185.00
214.00
171.00
256.00
273.00
300.00
342.00
376.00
14.30
15.20
17.10
19.00
22.80
25.70
28.50
31.40
34.20
37.10
40.90
44.70
48.50
53.20
58.90
64.60
71.30
77.90
86.50
95.00
105.00
114.00
124.00
135.00
152.00
162.00
171.00
209.00
237.00
190.00
285.00
304.00
333.00
380.00
418.00
15.00
16.00
18.00
20.00
24.00
27.05
30.00
33.00
36.00
39.00
43.00
47.00
51.05
56.00
62.00
68.00
75.00
82.00
91.00
100.00
110.00
120.00
130.00
150.00
160.00
170.00
180.00
220.00
250.00
200.00
300.00
320.00
350.00
400.00
440.00
15.80
16.80
18.90
21.00
25.20
28.40
31.50
34.70
37.80
41.00
45.20
49.40
53.60
58.80
65.10
71.40
78.80
86.10
95.50
105.00
116.00
126.00
137.00
165.00
168.00
179.00
189.00
231.00
263.00
210.00
315.00
336.00
368.00
420.00
462.00
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
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
21.2
22.5
25.2
27.7
33.2
37.5
41.4
45.7
49.9
53.9
59.3
64.8
70.1
77.0
85.0
92.0
103.0
113.0
125.0
137.0
152.0
165.0
179.0
215.0
219.0
234.0
246.0
328.0
344.0
274.0
414.0
438.0
482.0
548.0
603.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
71.00
67.00
59.50
54.00
45.00
40.00
36.00
33.00
30.00
28.00
25.30
23.20
21.40
19.50
17.70
16.30
14.60
13.30
12.00
11.00
9.90
9.10
8.40
7.00
6.80
6.40
6.10
4.60
5.00
5.50
3.58
4.50
3.08
2.78
3.50
0.084
0.086
0.088
0.090
0.094
0.096
0.097
0.098
0.099
0.100
0.101
0.101
0.102
0.103
0.104
0.104
0.105
0.105
0.106
0.106
0.107
0.107
0.107
0.108
0.108
0.108
0.108
0.109
0.109
0.108
0.110
0.110
0.110
0.110
0.110
Note 1. Normal selection of a zener transient over voltage suppressor is by rated stand–off voltage
(V
WM
) and should be equal or greater than DC or continuous peak operating voltage.
1.100
(27.94)
Min
.375
(9.52)
Max
.042 (1.07) Dia Max
Color Band Denotes Cathode
.205 (5.21)
Dia Max
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