NTE4900 Surge Clamping, Overvoltage Transient Suppressor, Unidirectional Description: The NTE4900 is a zener overvoltage transient suppressor in an axial lead type package designed to protect voltage sensitive components from high voltage, high energy transients. This device has excellent clamping capability, high surge capability, low zener impedance, and fast response time making the NTE4900 ideal for use in communication systems, numerical controls, process controls, medical equipment, business machines, power supplies and many other industrial/consumer ap- plications, to protect CMOS, MOS and Bipolar integrated circuits. Features: Peak Power: 1500W 1.0ms Maximum Clamp Voltage Peak Pulse Current Low Leakage: < 5.0 A Above 10V Absolute Maximum Ratings: Peak Power Dissipation (NonRepetitive Current Pulse, T +25C), P . . . . . . . . . . . . . . 1500W L PK Steady State Power Dissipation (T +75C, Lead length = 3/8), P . . . . . . . . . . . . . . . . . . . . . 5W L D Derate Above T = +75C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mW/C L Forward Curent Current (T = +25C, Note 1), I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200A A FSM Operating Junction Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to +175C J Storage Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to +175C stg Lead Temperature (During Soldering, 1/16 from case, 10sec), T . . . . . . . . . . . . . . . . . . . . . +230C L Note 1. 1/2 Square Wave (or equivalent), PW = 8.3ms, Duty Cycle = 4 Pulses per minute maximum. Electrical Characteristics: (T = +25C, V = 3.5V Max, I (Note 1) = 100A unless otherwise A F F specified) Parameter Symbol Test Conditions Min Typ Max Unit Breakdown Voltage V I = 1mA 6 V BR T Reverse StandOff Voltage V Note 2 5 V RWM Reverse Leakage Current I V = 5V 300 A R RWM Reverse Voltage (Clamping Voltage V I = 120A 8.5 V RSM RSM Clamping Voltage V I = 30A 7.6 V C PP I = 60A 8.0 V PP Note 1. 1/2 Square Wave (or equivalent), PW = 8.3ms, Duty Cycle = 4 Pulses per minute maximum. Note 2. A Transient Suppressor is normally selected according to the maximum reverse standoff voltage (V ), which should be equal to or greater than the DC or continuous peak operat- RWM ing voltage level.1.100 (27.94) .375 (9.52) Min Max .042 (1.07) Dia Max .205 (5.21) Dia Max .050 (1.27) Max (Both Ends) Color Band Denotes Cathode (Unidirectional ONLY. Bidirectional devices have NO band.)