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P4SMA18A
400 Watt Unidirectional Transient Voltage Suppresor
P4SMA18A P4SMA18A DO-214AC (SMA) Color Band Denotes Cathode Device Marking: 18A 400 Watt Unidirectional Transient Voltage Suppressor Absolute Maximum Ratings (Note 1) TA = 25°C unless otherwise noted Symbol Parameter Value Units PPPM Peak Pulse Power Dissipation on 10/1000µs waveform 400 W I Peak Pulse Current on 10/1000µs waveform 15.9 A PPM I Non-repetitive Peak Forward Surge Current superimposed on 40 A FSM rated load (JEDEC method) (Note 2) Note 1: These ratings are limiting values above which serviceability of any semiconductor device may be impaired. Note 2: Measured on 8.3ms single half-sine wave or equivalent square wave. Duty cycle = 4 pulses per minute maximum. Thermal Characteristics T = 25°C unless otherwise noted A Symbol Parameter Value Units Thermal Resistance from Junction to Ambient 120 °C/W R JA Q Thermal Resistance from Junction to Leads 30 °C/W R JL Q T Storage Temperature Range –65 to +150 °C stg TJ Operating Junction Temperature –65 to +150 °C Electrical Characteristics T = 25°C unless otherwise noted A Symbol Parameter Value Units V Breakdown Voltage at I = 1.0mA 17.1 - 18.9 V BR T Maximum Temperature Coefficient of V 0.089 %/°C BR aT V Reverse Stand-off Voltage 15.3 V RWM I Maximum Reverse Leakage Current @ V 1 µA R RWM V Maximum Clamping Voltage @ I 25.2 V C PPM © 2001 P4SMA18A Rev. A
