Metal-Oxide Varistors (MOVs) Surface Mount Multilayer Varistors (MLVs) > AUML Series RoHS AUML Varistor Series Description The AUML Series of Multilayer Transient Surge Suppressors was specifically designed to suppress the destructive transient voltages found in an automobile. The most common transient condition results from large inductive energy discharges. The electronic systems in the automobile, e.g. antilock brake systems, direct ignition systems, engine control, airbag control systems, wiper motor controls, etc., are susceptible to damage from these voltage transients and thus require protection. The AUML transient suppressors have temperature independent suppression characteristics affording protection from -40C to 125C. The AUML suppressor is manufactured from semiconducting Size Table ceramics which offer rugged protection and excellent transient energy absorption in a small package. The devices Metric EIA are available in ceramic leadless chip form, eliminating lead 3216 1206 inductance and assuring fast speed of response to transient surges. These Suppressors require significantly smaller 3225 1210 space and land pads than Silicon TVS diodes, offering greater 4532 1812 circuit board layout flexibility for the designer. 5650 2220 Also see the Littelfuse ML, MLN and MLE Series of Multilayer Suppressors. Features Applications AEC - Q200 compliant High peak surge Suppression of MLN Series) current capability inductive switching RoHS Compliant Provides on-board or other transient Low Profile, compact transient voltage Load Dump energy events such as EFT industry standard chip protection for ICs rated per SAE and surge voltage at size (1206, 1210, 1812 and transistors Specification J1113 the circuit board level and 2220 Sizes) Leadless, surface Used to help achieve ESD protection for Inherent bidirectional mount chip form electromagnetic components sensitive clamping compliance of Zero Lead Inductance to IEC 61000-4-2 No Plastic or epoxy end products Variety of energy (Level 4), MIL-STD- packaging assures Replace larger surface ratings available 883C, Method 3015.7, better than 94V-0 mount TVS Zeners in and other industry No temperature derating ammabilitfl y rating many applications specifications (See up to 125C ambient Also the MLE or Absolute Maximum Ratings For ratings of individual members of a series, see Device Ratings and Specifications chart. Continuous AUML Series Units Steady State Applied Voltage DC Voltage Range (V ) 18, 24, 48, 68 V M(DC) Transient Load Dump Energy, (W ) 1.5 to 25 J LD Jump Start Capability (5 minutes), (V ) 48 V JUMP O Operating Ambient Temperature Range (T ) -40 to +125 C A O Storage Temperature Range (T ) -40 to +150 C STG O Temperature Coefficient (V) of Clamping Voltage (V ) at Specified Test Current <0.01 %/ C C CAUTION: Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/27/20Metal-Oxide Varistors (MOVs) Surface Mount Multilayer Varistors (MLVs) > AUML Series Device Ratings and Specifications C C Maximum Ratings (125 ) Specifications (25 ) Maximum Jump Start Load Dump Nominal Varistor Voltage Maximum Standby Maximum Clamping Continuous DC Voltage Energy at 10mA Leakage Voltage (V ) at C Part Number Voltage (5 Min) (10 Pulses) DC Test Current (at 13V DC) Test Current (8/20s) V V W V Min V Max I V I M(DC) JUMP LD N(DC) N(DC) L C P (V) (V) (J) (V) (V) (A) (V) (A) V18AUMLA1206 18 24.5 1.5 23 32 50 40 1.5 V18AUMLA1210 18 24.5 3.0 23 32 50 40 1.5 V18AUMLA1812 18 24.5 6.0 23 32 100 40 5.0 V18AUMLA2220 18 24.5 25 23 32 200 40 10.0 V24AUMLA2220 24 24.5 25 32 39 200 60 10.0 V48AUMLA2220 48 24.5 25 54.5 66.5 200 105 10.0 V68AUMLA2220 68 24.5 25 77.2 94.4 200 135 10.0 NOTES: 1. Average power dissipation of transients not to exceed 0.1W, 0.15W, 0.3W and 1W for model sizes 1206, 1210, 1812 and 2220 respectively. 2. Load dump :min. time of energy input 40ms, interval 60sec(the load dump time constant Td differs from the time constant of energy input load dump rating for ISO 7637-2 pulse 5a, please contact littelfuse. 3. Thermal shock capability per Mil-Std-750, Method 1051: -55C to 125C, 5 minutes at 25C, 25 Cycles: 15 minutes at each extreme. 4. For application specific requirements, please contact Littelfuse. Current, Energy and Power Derating Curve Peak Pulse Current Test Waveform for Clamping Voltage When transients occur in rapid succession, the average power dissipation is the energy (watt-seconds) per pulse 100 times the number of pulses per second. The power so developed must be within the specifications shown on the Device Ratings and Characteristics Table for the specific device. Certain parameter ratings must be derated at high 50 temperatures as shown below. 0 100 T 90 O TIME 1 80 T 1 MAXIMUM LEAKAGE MAXIMUM CLAMPING VOLTAGE 70 100 T Figure 2 2 1210/1206 60 1812 2220 50 0 = Virtual Origin of Wave 1 40 T = Time from 10% to 90% of Peak 1210/1206 30 T = Rise Time = 1.25 x T 10 1 FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM 20 1812 T2220 = Decay Time FOR CLAMPING VOLTAGE 2 10 Example - For an 8/20 s Current Waveform: 0 O = VIR8TUs AL ORIGIN OF = T = Rise WATimeVE -55 50 60 70 80 90 100110 120130 140150 1 1 o t = TIME FROM 10% TO 90% OF PEAK AMBIENT TEMPERATURE ( C) 20s = T = Decay Time Figure 1 2 1 t = VIRTUAL FRONT TIME = 1.25 x t 1 1mA 100mA 100A 10A 100A 10mA 1A 10A t = VIRTUAL TIME TO HALF VALUE FIGURE 1. CURRENT, ENERGY AND POWER DERATING 2 CURRENT (IMPULSE DURATION) Maximum LeakagCURe CurVE rent/Clamping Voltage Curve for Typical V-I Characteristics of the V18AUMLA2220 at -40C, o FIGURE 2. MAXIMUM LEAKAGE CURRENT/CLAMPING VOLTAGE CURVE FOR AUML SERIES AT 25 C AUML Series at 25C 25C, 85C and 125CEXAMPLE: FOR AN 8/20 s CURRENT WAVEFORM 8s = t = VIRTUAL FRONT TIME 1 20 s = t = VIRTUAL TIME TO 100 2 MAXIMUM LEAKAGE MAXIMUM CLAMPING VOLTAGE HALF VALUE 100 1210/1206 1812 2220 o 1210/1206 -40 C 10 o 10 25 C 1812 2220 o 85 C o 125 C 1 1 1A 10A 100A 1mA 10mA 100mA 1A 10A100A1000A 10A 100A 1mA 10mA 100mA 1A 10A 100A CURRENT CURRENT Figure 3 Figure 4 o o o o o FIGURE 3. TYPICAL V-I CHARACTERISTICS OF THE V18AUMLA2220 at -40 C, 25 C, 85 C AND 125 C FIGURE 2. MAXIMUM LEAKAGE CURRENT/CLAMPING VOLTAGE CURVE FOR AUML SERIES AT 25 C 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/27/20 100 o -40 C 10 o 25 C o 85 C o 125 C 1 1A 10A 100A 1mA 10mA 100mA 1A 10A100A1000A CURRENT o o o o FIGURE 3. TYPICAL V-I CHARACTERISTICS OF THE V18AUMLA2220 at -40 C, 25 C, 85 C AND 125 C VOLTAGE VOLTAGE PERCENT OF RATED VALUE VOLTAGE VOLTAGE PERCENT OF PEAK VALUE