81CNQ035A

Bulletin PD-20040 rev. A 09/01 81CNQ...A SERIES SCHOTTKY RECTIFIER New GenIII D-61 Package Major Ratings and Characteristics Characteristics IF(AV) Rectangular waveform VRRM range IFSM @ tp = 5 µs sine VF TJ @ 40 Apk, TJ = 125°C (per leg) range 80 Amp Description/Features The 81CNQ...A center tap Schottky rectifier module series has been optimized for low reverse leakage at high temperature. The proprietary barrier technology allows for reliable operation up to 175 °C junction temperature. Typical applications are in switching power supplies, converters, free-wheeling diodes, and reverse battery protection. 175 °C TJ operation Center tap module High purity, high temperature epoxy encapsulation for enhanced mechanical strength and moisture resistance Low forward voltage drop High frequency operation Guard ring for enhanced ruggedness and long term reliability 81CNQ...A Units 80 35 to 45 4600 0.54 A V A V - 55 to 175 °C New fully transfer-mold low profile, small footprint, high current package Case Styles 81CNQ...A 81CNQ...ASM 81CNQ...ASL D61-8 www.irf.com D61-8-SM D61-8-SL 1 81CNQ...A Series Bulletin 20040 rev. A 09/01 Voltage Ratings Part number VR Max. DC Reverse Voltage (V) VRWM Max. Working Peak Reverse Voltage (V) 81CNQ035A 35 81CNQ040A 40 81CNQ045A 45 Absolute Maximum Ratings Parameters IF(AV) Max. Average Forward Current * See Fig. 5 IFSM EAS IAR Max. Peak One Cycle Non-Repetitive Surge Current (Per Leg) * See Fig. 7 Non-Repetitive Avalanche Energy (Per Leg) Repetitive Avalanche Current (Per Leg) 4600 790 54 8 A mJ A Following any rated load condition and with 10ms Sine or 6ms Rect. pulse rated VRRM applied 5µs Sine or 3µs Rect. pulse TJ = 25 °C, IAS = 8 Amps, L = 1.7 mH Current decaying linearly to zero in 1 µsec Frequency limited by TJ max. VA = 1.5 x VR typical 81CNQ Units 80 A Conditions 50% duty cycle @ TC = 141 °C, rectangular wave form Electrical Specifications Parameters VFM Max. Forward Voltage Drop (Per Leg) * See Fig. 1 (1) 81CNQ Units 0.60 0.74 0.54 0.66 5 45 2600 5.5 10000 V V V V mA mA pF nH V/ µs @ 40A @ 80A @ 40A @ 80A Conditions TJ = 25 °C TJ = 125 °C VR = rated VR IRM CT LS Max. Reverse Leakage Current (Per Leg) * See Fig. 2 Typical Series Inductance (1) (Per Leg) Max. Junction Capacitance (Per Leg) TJ = 25 °C TJ = 125 °C VR = 5VDC, (test signal range 100Khz to 1Mhz) 25°C Measured lead to lead 5mm from package body dv/dt Max. Voltage Rate of Change (Rated VR) (1) Pulse Width < 300µs, Duty Cycle