4903

NTE4903 thru NTE4999
Surge Clamping, Transient Overvoltage Suppressor
Bidirectional
Description:
The NTE4900 series of silicon Transient Suppressors designed to protect voltage sensitive components 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 (TA = +25°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500W
tclamping (0 volts to Bv Min) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 5 x 10−9 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
Note 1. NTE4908 and NTE4909 are discontinued devices and no longer available.
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 VC (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 @ IT
(Volts)
VR
VBR
Min
4903
4905
4907
4911
4915
183
183
183
183
183
5.50
6.40
7.02
8.55
10.20
6.12
7.13
7.79
9.50
11.40
Typ
6.80
7.50
8.20
10.00
12.00
Max
IT mA
7.48
7.88
8.61
10.50
12.60
10.0
10.0
10.0
10.0
1.0
Clamping Voltage
@ Ipp (1msec)
(Volts)
Reverse Leakage
Current @ VR
(µA)
Peak Pulse
Current
(Amps)
VC
IR
Ipp
10.8
11.3
12.1
14.5
16.7
1000.0
500.0
200.0
10.0
5.0
139.00
132.00
124.00
103.00
90.00
Temperature
Coefficient
of BV%/°C
0.057
0.061
0.065
0.073
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 VC (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 @ IT
(Volts)
VR
4919
4921
4923
4927
4929
4933
4935
4937
4939
4941
4943
4945
4947
4951
4953
4955
4959
4961
4963
4965
4967
4969
4971
4973
4975
4977
4979
4981
4983
4985
4989
4991
4993
4995
4997
4999
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
183
11.10
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
128.00
136.00
145.00
154.00
185.00
214.00
171.00
256.00
273.00
300.00
342.00
376.00
Clamping Voltage
@ Ipp (1msec)
(Volts)
Reverse Leakage
Current @ VR
(µA)
Peak Pulse
Current
(Amps)
VC
IR
Ipp
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
4.0
4.0
5.0
82.00
71.00
67.00
59.50
54.00
45.00
40.00
41.40
33.00
30.00
28.00
25.30
23.30
21.40
19.50
17.70
16.30
14.60
13.30
12.00
11.00
9.90
9.10
8.40
7.20
6.80
6.40
6.10
4.60
5.00
5.50
3.58
4.50
3.08
2.78
3.50
VBR
Min
Typ
Max
12.40
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
143.00
152.00
162.00
171.00
209.00
237.00
190.00
285.00
304.00
333.00
380.00
418.00
13.00
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
13.70
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
158.00
168.00
179.00
189.00
231.00
263.00
210.00
315.00
336.00
368.00
420.00
462.00
Temperature
Coefficient
of BV%/°C
IT mA
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
1.0
18.2
21.1
22.5
25.2
27.7
33.2
37.5
36.0
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
207.0
219.0
234.0
246.0
328.0
344.0
274.0
414.0
438.0
482.0
548.0
603.0
0.081
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 2. Normal selection of a zener transient over voltage suppressor is by rated stand−off voltage
(VWM) and should be equal or greater than DC or continuous peak operating voltage.
1.100
(27.94)
Min
.042 (1.07) Dia Max
.375
(9.52)
Max
.205 (5.21)
Dia Max