NTE4938 NTE

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 = +25C) 1500W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A t (0 volts to BV Min) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 1 x 1012 sec clamping Operating and Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65C to +175C Forward Surge Rating 200 Amps, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/20 Second at +25C Steady State Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 W T1 = +25C 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 Maximum Reverse Clamping Voltage Reverse Leakage Peak Pulse Temperature Stand Off Voltage I (1msec) Current V Current Coefficient NTE Type Diagram Breakdown Voltage I pp R T (Volts) ( A) (Amps) Number Number (Volts) (Volts) of BV%/C V V V I I R BR C R pp Min Typ Max I mA T 4902 183 5.80 6.45 6.80 7.14 10.0 10.5 1000.0 143.00 0.057 4904 183 6.40 7.13 7.50 7.88 10.0 11.3 500.0 132.00 0.061 4906 183 7.02 7.79 8.20 8.61 10.0 12.1 200.0 124.00 0.065 4910 183 8.55 9.50 10.00 10.50 1.0 14.5 10.0 103.00 0.073 4914 183 10.20 11.40 12.00 12.60 1.0 16.7 5.0 90.00 0.078 4918 183 11.10 12.40 13.00 13.70 1.0 18.2 5.0 82.00 0.081Electrical 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 Maximum Reverse Clamping Voltage Reverse Leakage Peak Pulse Temperature Stand Off Voltage I (1msec) Current V Current Coefficient NTE Type Diagram Breakdown Voltage I pp R T (Volts) ( A) (Amps) Number Number (Volts) (Volts) of BV%/C V V V I I R BR C R pp Min Typ Max I mA T 4920 183 12.80 14.30 15.00 15.80 1.0 21.2 5.0 71.00 0.084 4922 183 13.60 15.20 16.00 16.80 1.0 22.5 5.0 67.00 0.086 4926 183 15.30 17.10 18.00 18.90 1.0 25.2 5.0 59.50 0.088 4928 183 17.10 19.00 20.00 21.00 1.0 27.7 5.0 54.00 0.090 4932 183 20.50 22.80 24.00 25.20 1.0 33.2 5.0 45.00 0.094 4934 183 23.10 25.70 27.05 28.40 1.0 37.5 5.0 40.00 0.096 4936 183 25.60 28.50 30.00 31.50 1.0 41.4 5.0 36.00 0.097 4938 183 28.20 31.40 33.00 34.70 1.0 45.7 5.0 33.00 0.098 4940 183 30.80 34.20 36.00 37.80 1.0 49.9 5.0 30.00 0.099 4942 183 33.30 37.10 39.00 41.00 1.0 53.9 5.0 28.00 0.100 4944 183 36.80 40.90 43.00 45.20 1.0 59.3 5.0 25.30 0.101 4946 183 40.20 44.70 47.00 49.40 1.0 64.8 5.0 23.20 0.101 4950 183 43.60 48.50 51.05 53.60 1.0 70.1 5.0 21.40 0.102 4952 183 47.80 53.20 56.00 58.80 1.0 77.0 5.0 19.50 0.103 4954 183 53.00 58.90 62.00 65.10 1.0 85.0 5.0 17.70 0.104 4958 183 58.10 64.60 68.00 71.40 1.0 92.0 5.0 16.30 0.104 4960 183 64.10 71.30 75.00 78.80 1.0 103.0 5.0 14.60 0.105 4962 183 70.10 77.90 82.00 86.10 1.0 113.0 5.0 13.30 0.105 4964 183 77.80 86.50 91.00 95.50 1.0 125.0 5.0 12.00 0.106 4966 183 85.50 95.00 100.00 105.00 1.0 137.0 5.0 11.00 0.106 4968 183 94.00 105.00 110.00 116.00 1.0 152.0 5.0 9.90 0.107 4970 183 102.00 114.00 120.00 126.00 1.0 165.0 5.0 9.10 0.107 4972 183 111.00 124.00 130.00 137.00 1.0 179.0 5.0 8.40 0.107 4974 183 121.00 135.00 150.00 165.00 1.0 215.0 5.0 7.00 0.108 4976 183 136.00 152.00 160.00 168.00 1.0 219.0 5.0 6.80 0.108 4978 183 145.00 162.00 170.00 179.00 1.0 234.0 5.0 6.40 0.108 4980 183 154.00 171.00 180.00 189.00 1.0 246.0 5.0 6.10 0.108 4982 183 185.00 209.00 220.00 231.00 1.0 328.0 5.0 4.60 0.109 4984 183 214.00 237.00 250.00 263.00 1.0 344.0 5.0 5.00 0.109 4988 183 171.00 190.00 200.00 210.00 1.0 274.0 5.0 5.50 0.108 4990 183 256.00 285.00 300.00 315.00 1.0 414.0 5.0 3.58 0.110 4992 183 273.00 304.00 320.00 336.00 1.0 438.0 5.0 4.50 0.110 4994 183 300.00 333.00 350.00 368.00 1.0 482.0 5.0 3.08 0.110 4996 183 342.00 380.00 400.00 420.00 1.0 548.0 5.0 2.78 0.110 4998 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 ) 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 Color Band Denotes Cathode