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. T ransient 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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)
Clamping Voltage
@ Ipp (1msec)
(Volts)
Reverse Leakage
Current @ VR
(µA)
Peak Pulse
Current
(Amps)
Temperature
Coefficient
of BV%/°C
VRVBR VCIRIpp
Min Typ Max IT 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 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)
Clamping Voltage
@ Ipp (1msec)
(Volts)
Reverse Leakage
Current @ VR
(µA)
Peak Pulse
Current
(Amps)
Temperature
Coefficient
of BV%/°C
VRVBR VCIRIpp
Min Typ Max IT 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 stand–off voltage
(VWM) 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
