NTE4828 thru NTE4868 Surge Clamping, Transient Overvoltage Suppressor Unidirectional Description: The NTE4800 Series of high power transient suppressors are Silicon PN Junction devices designed for absorbtion of high voltage transients associated with power disturbances, switching and induced lighting effects. These devices were designed to be used on the output of switching power supplies and may be used to replace crowbar circuits. They are able to withstand high levels of peak current while allowing a circuit breaker to trip of a fuse to blow before shorting. This will enable the user to reset the breaker or replace the fuse and continue operation. For this type of operation, it is recommended that a sufficient mounting surface be used for dissipating the heat generated by the device during the transient or overvoltage condition. Features: Glass Passivated Junction 5000W Peak Pulse Power Capability on 10/1000 s Waveform Repetition Rate (Duty Cycle): 0.05% Low Incremental Surge Resistance Fast Response Time Absolute Maximum Ratings: (T = +25C unless otherwise specified) A Minimum Peak Puse Power Dissipation (10/1000 s Waveform, Note 1), P . . . . . . . . . . 5000W PPM Peak Pulse Current (10/1000 s Waveform, Note 1), I . . . . . . . . . . . . . . . . . . . . . . . . . . See Table PPM Steady State Power Dissipation (T = +75C, Lead Length .375 (9.5mm), Note 2), P . . . 8W L M(AV) Peak Forward Surge Current, I FSM (8.3ms Single Half SineWave Superimposed on Rated Load, Note 3) . . . . . . . . . . . . . 400A Instantaneous Forward Voltage (I = 100A, Note 3), V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5V F F Operating Junction Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 to +175C J Storage Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 to +175C stg Lead Temperature (During Soldering, .375 (9.5mm) Lead Length, 10sec ), T . . . . . . . . . . +300C L Note 1. Nonrepetitive current pulse, dereated above T = +C. A 2 2 Note 2. Mounted on Copper Leaf area of 0.79in (20mm ). Note 3. Measured on 8.3ms single half sinewave or equivalent square wave, duty cycle = 4 pulses per minute maximum.Electrical Characteristics: (T = +25C unless otherwise specified) A Maximum Ratings Maximum Reverse Clamping Voltage Reverse Leakage Peak Pulse Temperature I (1msec) Current V Current NTE Type Stand Off Voltage Breakdown Voltage I (Note 4) pp R Coefficient T (Volts) ( A) (Amps) Number (Volts) (Volts) of BV%/C V V V I I R BR C R pp Min Typ Max I mA T 4828 15.0 16.7 20.4 5.0 24.4 10.0 206.00 0.094 4840 24.0 26.7 29.5 5.0 38.9 10.0 128.00 0.101 4846 30.0 33.3 36.8 5.0 48.4 10.0 103.00 0.103 4848 33.0 36.7 40.6 5.0 53.3 10.0 94.00 0.104 4850 36.0 40.0 44.2 5.0 58.1 10.0 85.00 0.104 4858 48.0 53.3 58.9 5.0 77.4 10.0 65.00 0.106 4868 64.0 71.1 78.6 5.0 103.0 10.0 49.00 0.108 Note 4. V measured after I applied for 300ms. I = Square Wave Pulse or equivalent.. (BR) T T 1.000 (25.4) .360 (9.1) Min Max .360 (9.1) Dia Max .052 (1.3) Dia Max Color Band Denotes Cathode