TVS Diodes Axial > 1500W > 1N5908 1N5908 Pb Description These devices are designed to protect voltage sensitive components from high voltage, high-energy transients. They have excellent clamping capability, high surge capability, low zener impedance and fast response time. These devices are the Littelfuse exclusive, cost effective, highly reliable axial leaded package and are ideally suited for use in communication systems, numerical controls, process controls, medical equipment, business machines, power supplies and many other industrial/consumer applications, to protect CMOS, MOS and Bipolar integrated circuits. Features Maximum Ratings and Thermal Characteristics Rating Peak Power Dissipation (Note 1) @ TL " 25C Steady State Power Dissipation @ TL "75C, Lead Length = 3/8 Symbol Value Unit PPK 1500 W 5.0 W 50 mW/C PPK Derated above TL = 75C Working Peak Reverse Voltage Range - 5.0 V Peak Power - 1500 Watts @ 1 ms Maximum Clamp Voltage @ Peak Pulse Current Low Leakage < 5 A Above 10 V Response Time is Typically < 1 ns Bi-directional These are Pb-Free Devices* Functional Diagram Cathode Thermal Resistance, Junction-to-Lead R8JL 20 C/W Forward Surge Current (Note 2) @TA = 25C IFSM 200 A Operating and Storage Temperature Range * * * * * * TJ, Tstg -65 to +175 Anode Additional Information Uni-directional C/W Datasheet Resources Samples Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 1. Nonrepetitive current pulse per Figure 4 and derated above TA = 25C per Figure 2. 2. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per minute maximum. *Bidirectional device will not be available in this device (c) 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/17 TVS Diodes Axial > 1500W > 1N5908 I-V Curve Characteristics (TA = 25C unless otherwise noted, VF = 3.5 V Max. @ IF (Note 3) = 100 A) Symbol I I V I I I Parameter IPP Maximum Reverse Peak Pulse Current VC Clamping Voltage @ IPP VRWM Working Peak Reverse Voltage IR Maximum Reverse Leakage Current @ VRWM VBR Breakdown Voltage @ IT IT Test Current IF Forward Current VF Forward Voltage @ IF Ratings and Characteristic Curves Figure 2. Pulse Derating Curve PPK, PEAK POWER (kW) 100 NONREPETITIVE PULSE WAVEFORM SHOWN IN FIGURE 5 10 1 s s 1 ms PEAK PULSE DERATING IN % OF PEAK POWER OR CURRENT @ TA= 25 C Figure 1. Pulse Rating Curve 100 80 60 40 20 0 02 10 ms 55 07 t , PULSE WIDTH Figure 4. Pulse Waveform tr 3/8 3/8 5 4 3 " " PULSE WIDTH (tP) IS DEFINED AS THAT POINT WHERE THE PEAK CURRENT DECAYS TO 50% OF I PP. s PEAK VALUE - IPP 100 VALUE (%) PD , STEADY STATE POWER DISSIPATION (WATTS) Figure 3. Steady State Power Derating 51 00 1251 50 175 200 TA, AMBIENT TEMPERATURE C) ( HALF VALUE 50 2 IPP 2 tP 1 0 0 0 25 50 75 1001 25 1501 75 TL, LEAD TEMPERATURE (C) 200 01 23 4 t, TIME (ms) (c) 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/17 TVS Diodes Axial > 1500W > 1N5908 Figure 5. Typical Derating Factor for Duty Cycle Typical Protection Circuit 1 0.7 0.5 Zin DERATING FACTOR 0.3 0.2 PULSE WIDTH 10 ms 0.1 0.07 0.05 Vin 0.03 VL 100 s 0.02 0.01 0.10 LOAD 1 ms 10 s .2 0.52 1 51 05 D, DUTY CYCLE (%) 20 00 10 (c) 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/17 TVS Diodes Axial > 1500W > 1N5908 Electrical Characteristics Device (Notes 4) 1N5908 (TA = 25 C unless otherwise noted, VF = 3.5 V Max. @ IF (Note 3) = 53 A) VRWM (Note 5) Breakdown Voltage I @V R VBR (V) (Note 6) RWM VC (Volts) (Note 7) @IT (Volts) (A) Min Nom Max (mA) 5.0 300 6.0 - - 1.0 @ IPP = 120 A 8.5 @ IPP = 60 A @ IPP = 30 A 8.0 3. Square waveform, PW = 8.3 ms, Non-repetitive duty cycle. 4. 1N5908 is JEDEC registered as a unidirectional device only (no bidirectional option) 5. A transient suppressor is normally selected according to the maximum working peak reverse voltage (VRWM), which should be equal to or greater than the dc or continuous peak operating voltage level. 6. VBR measured at pulse test current IT at an ambient temperature of 25C and minimum voltages in VBR are to be controlled. 7. Surge current waveform per Figure 4 and derate per Figure 2 of the General Data - 1500 W at the beginning of this group (c) 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/17 7.6 TVS Diodes Axial > 1500W > 1N5908 Dimensions ORDERING INFORMATION Device B D P P K A 1N5908G Axial Lead (Pb-Free) 500 Units/Box 1N5908RL4G Axial Lead (Pb-Free) 1500/Tape & Reell Peak Temperature : 260C Dipping Time : 1/16" from the case for 10 seconds Physical Specifications Inches Min Shipping Flow/Wave Soldering (Solder Dipping) K Dim Package Millimeters Max Min Max A 0.335 0.374 8.50 9.50 B 0.189 0.209 4.80 5.30 D 0.038 0.042 0.96 1.06 K 1.000 --- 25.40 --- P --- 0.050 --- 1.27 Case Void-free, transfer-molded, thermosetting plastic Leads Modified L-Bend providing more contact area to bond pads Finish All external surfaces are corrosion resistant and leads are readily solderable Mounting Position Any NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. LEAD FINISH AND DIAMETER UNCONTROLLED IN DIMENSION P. 4. 041A-01 THRU 041A-03 OBSOLETE, NEW STANDARD 041A-04. Part Marking System Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics. (c) 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/17