NTE4991 NTE

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 = +25C) 1500W A t (0 volts to Bv Min) < 5 x 109 sec clamping Operating and Storage Temperature . 65C 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 V (Clamping Voltage) to the actual BV C (Breakdown Voltage) as measured on a specific device. Maximum Ratings Clamping Voltage Reverse Leakage Peak Pulse Maximum Reverse Temperature I (1msec) Current V Current NTE Type Diagram Stand Off Voltage Breakdown Voltage I pp R Coefficient T Number Number (Volts) (Volts) (Volts) ( A) (Amps) of BV%/C V V V I I R BR C R pp Min Typ Max I mA T 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 0.078Electrical Characteristics (Contd): Clamping Factor: 1.33 full rated power 1.20 50% rated power The clamping factor is defined as: The ratio of the actual V (Clamping Voltage) to the actual BV C (Breakdown Voltage) as measured on a specific device. Maximum Ratings Clamping Voltage Reverse Leakage Peak Pulse Maximum Reverse Temperature I (1msec) Current V Current NTE Type Diagram Stand Off Voltage Breakdown Voltage I pp R Coefficient T Number Number (Volts) (Volts) (Volts) ( A) (Amps) of BV%/C V V V I I R BR C R pp Min Typ Max I mA T 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 2. Normal selection of a zener transient over voltage suppressor is by rated standoff voltage (V ) and should be equal or greater than DC or continuous peak operating voltage. WM 1.100 .375 (27.94) (9.52) Min Max .042 (1.07) Dia Max .205 (5.21) Dia Max