NTE4903 thru NTE4999
Surge Clamping, Transient Overvoltage Suppressor
Bidirectional
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
integrated 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)
<
5 x 109 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)
Breakdown Voltage @ I
T
(Volts)
Clamping Voltage
@ I
pp
(1msec)
(Volts)
Reverse Leakage
Current @ V
R
(
A)
Peak Pulse
Current
(Amps)
Temperature
Coefficient
of BV%/
C
V
R
V
BR
V
C
I
R
I
pp
Min
Typ
Max
I
T
mA
4903
183
5.50
6.12
6.80
7.48
10.0
10.8
1000.0
139.00
0.057
4905
183
6.40
7.13
7.50
7.88
10.0
11.3
500.0
132.00
0.061
4907
183
7.02
7.79
8.20
8.61
10.0
12.1
200.0
124.00
0.065
4911
183
8.55
9.50
10.00
10.50
10.0
14.5
10.0
103.00
0.073
4915
183
10.20
11.40
12.00
12.60
1.0
16.7
5.0
90.00
0.078
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)
Breakdown Voltage @ I
T
(Volts)
Clamping Voltage
@ I
pp
(1msec)
(Volts)
Reverse Leakage
Current @ V
R
(
A)
Peak Pulse
Current
(Amps)
Temperature
Coefficient
of BV%/
C
V
R
V
BR
V
C
I
R
I
pp
Min
Typ
Max
I
T
mA
4919
183
11.10
12.40
13.00
13.70
1.0
18.2
5.0
82.00
0.081
4921
183
12.80
14.30
15.00
15.80
1.0
21.1
5.0
71.00
0.084
4923
183
13.60
15.20
16.00
16.80
1.0
22.5
5.0
67.00
0.086
4927
183
15.30
17.10
18.00
18.90
1.0
25.2
5.0
59.50
0.088
4929
183
17.10
19.00
20.00
21.00
1.0
27.7
5.0
54.00
0.090
4933
183
20.50
22.80
24.00
25.20
1.0
33.2
5.0
45.00
0.094
4935
183
23.10
25.70
27.05
28.40
1.0
37.5
5.0
40.00
0.096
4937
183
25.60
28.50
30.00
31.50
1.0
36.0
5.0
41.40
0.097
4939
183
28.20
31.40
33.00
34.70
1.0
45.7
5.0
33.00
0.098
4941
183
30.80
34.20
36.00
37.80
1.0
49.9
5.0
30.00
0.099
4943
183
33.30
37.10
39.00
41.00
1.0
53.9
5.0
28.00
0.100
4945
183
36.80
40.90
43.00
45.20
1.0
59.3
5.0
25.30
0.101
4947
183
40.20
44.70
47.00
49.40
1.0
64.8
5.0
23.30
0.101
4951
183
43.60
48.50
51.05
53.60
1.0
70.1
5.0
21.40
0.102
4953
183
47.80
53.20
56.00
58.80
1.0
77.0
5.0
19.50
0.103
4955
183
53.00
58.90
62.00
65.10
1.0
85.0
5.0
17.70
0.104
4959
183
58.10
64.60
68.00
71.40
1.0
92.0
5.0
16.30
0.104
4961
183
64.10
71.30
75.00
78.80
1.0
103.0
5.0
14.60
0.105
4963
183
70.10
77.90
82.00
86.10
1.0
113.0
5.0
13.30
0.105
4965
183
77.80
86.50
91.00
95.50
1.0
125.0
5.0
12.00
0.106
4967
183
85.50
95.00
100.00
105.00
1.0
137.0
5.0
11.00
0.106
4969
183
94.00
105.00
110.00
116.00
1.0
152.0
5.0
9.90
0.107
4971
183
102.00
114.00
120.00
126.00
1.0
165.0
5.0
9.10
0.107
4973
183
111.00
124.00
130.00
137.00
1.0
179.0
5.0
8.40
0.107
4975
183
128.00
143.00
150.00
158.00
1.0
207.0
5.0
7.20
0.108
4977
183
136.00
152.00
160.00
168.00
1.0
219.0
5.0
6.80
0.108
4979
183
145.00
162.00
170.00
179.00
1.0
234.0
5.0
6.40
0.108
4981
183
154.00
171.00
180.00
189.00
1.0
246.0
5.0
6.10
0.108
4983
183
185.00
209.00
220.00
231.00
1.0
328.0
5.0
4.60
0.109
4985
183
214.00
237.00
250.00
263.00
1.0
344.0
5.0
5.00
0.109
4989
183
171.00
190.00
200.00
210.00
1.0
274.0
5.0
5.50
0.108
4991
183
256.00
285.00
300.00
315.00
1.0
414.0
5.0
3.58
0.110
4993
183
273.00
304.00
320.00
336.00
1.0
438.0
5.0
4.50
0.110
4995
183
300.00
333.00
350.00
368.00
1.0
482.0
4.0
3.08
0.110
4997
183
342.00
380.00
400.00
420.00
1.0
548.0
4.0
2.78
0.110
4999
183
376.00
418.00
440.00
462.00
1.0
603.0
5.0
3.50
0.110
Note 1. Normal selection of a zener transient over voltage suppressor is by rated standoff 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
.205 (5.21)
Dia Max
.042 (1.07) Dia Max
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