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: D Glass Passivated Junction D 5000W Peak Pulse Power Capability on 10/1000µs Waveform D Repetition Rate (Duty Cycle): 0.05% D Low Incremental Surge Resistance D Fast Response Time Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Minimum Peak Puse Power Dissipation (10/1000µs Waveform, Note 1), PPPM . . . . . . . . . . 5000W Peak Pulse Current (10/1000µs Waveform, Note 1), IPPM . . . . . . . . . . . . . . . . . . . . . . . . . . See Table Steady State Power Dissipation (TL = +75°C, Lead Length .375” (9.5mm), Note 2), PM(AV) . . . 8W Peak Forward Surge Current, IFSM (8.3ms Single Half Sine–Wave Superimposed on Rated Load, Note 3) . . . . . . . . . . . . . 400A Instantaneous Forward Voltage (IF = 100A, Note 3), VF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5V Operating Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +175°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +175°C Lead Temperature (During Soldering, .375” (9.5mm) Lead Length, 10sec ), TL . . . . . . . . . . +300°C Note 1. Non–repetitive current pulse, dereated above TA = +°C. Note 2. Mounted on Copper Leaf area of 0.79in2 (20mm2). Note 3. Measured on 8.3ms single half sine–wave or equivalent square wave, duty cycle = 4 pulses per minute maximum. Electrical Characteristics: (TA = +25°C unless otherwise specified) Maximum Ratings NTE Type Number Maximum Reverse Stand Off Voltage (Volts) Breakdown Voltage @ IT (Note 4) (Volts) VBR VR 4828 4840 4846 4848 4850 4858 4868 15.0 24.0 30.0 33.0 36.0 48.0 64.0 Min Typ Max IT mA 16.7 26.7 33.3 36.7 40.0 53.3 71.1 – – – – – – – 20.4 29.5 36.8 40.6 44.2 58.9 78.6 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Clamping Voltage @ Ipp (1msec) (Volts) Reverse Leakage Current @ VR (µA) Peak Pulse Current (Amps) VC IR Ipp 10.0 10.0 10.0 10.0 10.0 10.0 10.0 206.00 128.00 103.00 94.00 85.00 65.00 49.00 24.4 38.9 48.4 53.3 58.1 77.4 103.0 Temperature Coefficient of BV%/°C Note 4. V(BR) measured after IT applied for 300ms. IT = Square Wave Pulse or equivalent.. 1.000 (25.4) Min .360 (9.1) Max .360 (9.1) Dia Max .052 (1.3) Dia Max Color Band Denotes Cathode 0.094 0.101 0.103 0.104 0.104 0.106 0.108