PolySwitch(R) Resettable PPTCs Surface Mount > Automotive ASMD Series Automotive ASMD Series RoHS Description Helping to reduce weight of wire harnesses. PPTC devices distributed in a circuit can allow the use of smaller wire sizes with the resulting harnesses. Forego looping back and forth around a fuse box and place your protection wherever you see fit. The solid state composition of PPTC devices helps provide reliability. Applications * Automotive and industrial transportation * Actuators and medium motors * Trace protection Features * Harness/junction box protection * Products meet applicable automotive industry standards * Powered outputs * Compatible with high-volume electronics assembly * Electronic control modules * Resettable solution against overcurrent and short-circuit * Telematics/Infotainment * AEC-Q200 qualified, RoHS compliant, and ISO/TS16949 certified Benefits * Surface-mount form factor * Expertise from the world's leading resettable overcurrent protection manufacturer Additional Information * Wide range of dedicated automotive surface-mount and radial-leaded resettable overcurrent devices * High performance transient voltage protection devices Datasheet Samples Resources Electrical Characteristics Part Number IH(A)@ IH(A)@ IT VMAX (R1MAX) (RaMAX) (A) (VDC) IMAX PD Typ (A) (W) Max Time-to-trip (A) RMIN R1MAX RaMAX (s) () () () ASMD - 16-60V ASMD030F 0.23 0.23 0.59 60 10 1.1 1.15 12.0 0.980 4.800 4.800 ASMD050F 0.37 0.37 0.98 60 10 1.7 1.95 20.0 0.290 1.400 1.400 ASMD075F 0.60 0.60 1.48 30 40 1.1 3.00 20.0 0.290 1.000 1.000 ASMD100F 0.90 0.90 2.16 30 40 1.1 4.50 20.0 0.098 0.480 0.480 ASMD125F 1.04 1.04 2.46 16 40 1.1 5.20 20.0 0.057 0.250 0.250 ASMD150F 1.27 1.27 2.95 16 40 1.2 6.35 25.0 0.049 0.250 0.250 ASMD150F/33 1.20 1.20 2.88 33 40 1.9 6.00 14.0 0.068 0.230 0.230 ASMD185F 1.85 1.85 3.70 16 40 1.5 9.25 11.3 0.032 0.126 0.126 ASMD200F 1.73 1.73 3.93 16 40 1.2 8.65 30.0 0.050 0.120 0.120 ASMD250F 1.97 1.97 5.00 16 40 1.2 9.85 30.0 0.035 0.085 0.085 Notes: IH :Hold current: maximum current device will pass without interruption in 25C, unless otherwise specified IT :Trip current: minimum current that will switch the device from low-resistance to high-resistance in 25C still air, unless otherwise specified. VMAX :Maximum voltage device can withstand without damage at rated current. IMAX :Maximum fault current device can withstand without damage at rated voltage. PD :Power dissipated from device when in the tripped state in 25C still air, unless otherwise specified. RMIN :Minimum resistance of device as supplied at 25C, unless otherwise specified. R1MAX:Maximum resistance of device when measured one hour post reflow, unless otherwise specified. RaMAX:Maximum functional resistance of device after being subjected to the stresses described in PS400 at 25C, unless otherwise specified. (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/14/19 PolySwitch(R) Resettable PTCs Surface Mount > Automotive ASMD Series Temperature Rerating Maximum Ambient Temperature Part Number -40C -20C 0C 20C 25C 40C 50C 60C 70C 85C 0.11 Hold Current (A) ASMD - 16-60V ASMD030F 0.35 0.31 0.27 0.23 0.22 0.19 0.17 0.15 0.13 ASMD050F 0.59 0.53 0.46 0.39 0.37 0.33 0.29 0.26 0.23 0.18 ASMD075F 0.91 0.81 0.71 0.60 0.58 0.50 0.45 0.40 0.35 0.28 ASMD100F 1.37 1.22 1.06 0.90 0.86 0.76 0.68 0.60 0.52 0.41 ASMD125F 1.58 1.40 1.23 1.04 1.00 0.87 0.78 0.70 0.60 0.48 ASMD150F 1.93 1.70 1.50 1.27 1.22 1.07 0.95 0.85 0.74 0.58 ASMD150F/33 1.96 1.73 1.50 1.26 1.20 1.03 0.91 0.80 0.68 0.51 ASMD185F 2.93 2.58 2.30 1.93 1.85 1.62 1.44 1.30 1.12 0.88 ASMD200F 2.63 2.34 2.04 1.73 1.66 1.45 1.30 1.16 1.00 0.80 ASMD250F 3.00 2.66 2.32 1.97 1.89 1.65 1.48 1.32 1.14 0.91 Temperature Rerating Curve % of Rated Hold and Trip Current 200 150 100 50 0 -40 -20 0 20 40 60 Ambient Temperature (C) (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/14/19 80 100 120 PolySwitch(R) Resettable PPTCs Surface Mount > Automotive ASMD Series Typical Time-to-Trip Curves at 25C 100 A B C D EF H I G 10 Time-to-Trip (s) ASMD A = ASMD030F B= ASMD050F C= ASMD075F D= ASMD100F E= ASMD125F F = ASMD150F, ASMD150F/33 G= ASMD185F H= ASMD200F I=ASMD250F 1 0.1 A 0.01 0.1 C B 1 D E G HI F 10 100 Fault Current (A) Physical Specifications Terminal Pad Material 98%+ Tin-plated Brass Soldering Characteristics Solderability per ANSI-J-STD-002 Category 1 Solder Heat Withstand per IEC 60068-2-20, Test Tb, Section 5, Method 1a Flammability Resistance per IEC 60695-11-5 Needle Flame Test for 20 seconds Recommended Storage Conditions 40C max, 70% RH max; Devices May Not Meet Specified Ratings if Storage Conditions are Exceeded Operation Temperature -40C~85C Note: See PS400 for other physical specifications. Environmental Specifications Test Conditions Resistance Change 60C, 1000 hrs 3% Typical 85C, 1000 hrs 5% Typical Humidity Aging 85C, 85% R.H., 100 hrs 1.2% Typical Thermal Shock 85C, -40C 20 times 125C, -55C 10 times -33% Typical -33% Typical Freon No change No change No change Passive Aging Solvent Resistance Trichloroethane Hydrocarbons Note: See PS400 for other environmental specifications. Moisture Resistance Level Level 2a, J-STD-020 Storage Conditions 40C max, 70% RH max; devices should remain in original sealed bags prior to use. Devices may not meet specified values if these storage conditions are exceeded. (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/14/19 PolySwitch(R) Resettable PTCs Surface Mount > Automotive ASMD Series Dimension Figures C C F H B D G B D E F E A A Figure 1 Dimensions Dimensions in Millimeters (Inches) A Part Number Min B Max Min C Max Min D Max Min E Max Min F Max Min G Max Min H Max Min Figure Max ASMD - 16-60V ASMD030F 6.73 7.98 (0.265) (0.314) -- 3.18 4.8 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43 (0.125) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017) -- 1 ASMD050F 6.73 7.98 (0.265) (0.314) -- 3.18 4.8 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43 (0.125) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017) -- 1 ASMD075F 6.73 7.98 (0.265) (0.314) -- 3.18 4.8 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43 (0.125) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017) -- 1 ASMD100F 6.73 7.98 (0.265) (0.314) -- 3.00 4.8 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43 (0.118) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017) -- 1 ASMD125F 6.73 7.98 (0.265) (0.314) -- 3.00 4.8 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43 (0.118) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017) -- 1 ASMD150F 8.00 9.40 (0.315) (0.370) -- 3.00 6.0 6.71 0.56 0.71 0.56 0.71 3.68 3.94 0.66 1.37 0.43 (0.118) (0.24) (0.264) (0.022) (0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054) (0.017) -- 1 ASMD150F/33 8.00 9.40 (0.315) (0.370) -- 3.00 6.0 6.71 0.56 0.71 0.56 0.71 3.68 3.94 0.66 1.37 0.43 (0.118) (0.24) (0.264) (0.022) (0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054) (0.017) -- 1 ASMD185F 8.00 9.40 (0.315) (0.370) -- 3.00 6.0 6.71 0.56 0.71 0.56 0.71 3.68 3.94 0.66 1.37 0.43 (0.118) (0.24) (0.264) (0.022) (0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054) (0.017) -- 1 ASMD200F 8.00 9.40 (0.315) (0.370) -- 3.00 6.0 6.71 0.56 0.71 0.56 0.71 3.68 3.94 0.66 1.37 0.43 (0.118) (0.24) (0.264) (0.022) (0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054) (0.017) -- 1 ASMD250F 8.00 9.40 (0.315) (0.370) -- 3.00 6.0 6.71 0.56 0.71 0.56 0.71 3.68 3.94 0.66 1.37 0.43 (0.118) (0.24) (0.264) (0.022) (0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054) (0.017) -- 1 (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/14/19 PolySwitch(R) Resettable PPTCs Surface Mount > Automotive ASMD Series Recommended Pad Layout A B C B Packaging and Marking Information Recommended Pad Layout Figures [mm (in)] Part Number Tape and Reel Quantity Standard Package Part Marking Dimension A (Min*/Nom) Dimension B (Nom) Dimension C (Nom) ASMD - 16-60V ASMD030F 2,000 10,000 030F 3.1 (0.12) 2.3 (0.09) 5.1 (0.201) ASMD050F 2,000 10,000 050F 3.1 (0.12) 2.3 (0.09) 5.1 (0.201) ASMD075F 2,000 10,000 075F 3.1 (0.12) 2.3 (0.09) 5.1 (0.201) ASMD100F 2,000 10,000 100F 3.1 (0.12) 2.3 (0.09) 5.1 (0.201) ASMD125F 2,000 10,000 125F 3.1 (0.12) 2.3 (0.09) 5.1 (0.201) ASMD150F 1,500 7,500 150F 4.6 (0.18) 2.3 (0.09) 6.1 (0.240) ASMD150F/33 1,500 7,500 153F 4.6 (0.18) 2.3 (0.09) 6.1 (0.240) ASMD185F 1,500 7,500 185A 4.6 (0.18) 2.3 (0.09) 6.1 (0.240) ASMD200F 1,500 7,500 200F 4.6 (0.18) 2.3 (0.09) 6.1 (0.240) ASMD250F 1,500 7,500 250F 4.6 (0.18) 2.3 (0.09) 6.1 (0.240) * These devices are intended for use in automotive applications. (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/14/19 PolySwitch(R) Resettable PTCs Surface Mount > Automotive ASMD Series Solder Reflow Recommendations Profile Feature Pb-Free Assembly Average ramp up rate (TsMAX to Tp) 3C/s max Preheat 150C * Temperature max (TsMAX) 200C * Time (tsMIN to tsMAX) 60-120 s Time maintained above: * Temperature (TL) 217C * Time (tL) 60-150 s Peak/Classification temperature (Tp) 260C TL Temperature * Temperature min (TsMIN) tp Tp Critical Zone TL to Tp Ramp Up tL TsMAX TsMIN ts Preheat 25 Reflow Profile Ramp Down t 25C to Peak Time Time within 5C of actual peak temperature Time (tp) 30 s max Ramp down rate 3C/s max Time 25C to peak temperature 8 min max Note: All temperatures refer to topside of the package, measured on the package body surface. Solder Reflow * Recommended reflow method: IR, hot air, nitrogen. * Recommended maximum paste thickness: 0.25mm (0.010in) * Devices can be cleaned using standard methods and aqueous solvents. * Experience has shown the optimum conditions for forming acceptable solder fillets occur when a reasonable amount of solder paste is placed underneath each device's termination. As such, we request that customers comply with our recommended solder pad layouts. * Customer should validate that the solder paste amount and reflow recommendations meet its application. * We request that customer board layouts refrain from placing raised features (e.g. vias, nomenclature, traces, etc.) underneath PolySwitch devices. It is possible that raised features could negatively impact solderability performance of our devices. Rework * Standard industry practices. (Please also avoid direct contact to the device.) Part Ordering Number System ASMD 150 F /33 -2 Packaging 2 = Tape and Reel Alternative Voltage Rating (If Applicable) Lead Free Hold Current Indicator Product Series (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/14/19 PolySwitch(R) Resettable PPTCs Surface Mount > Automotive ASMD Series Tape and Reel Specifications ASMD EIA 481-2 Description ASMD030F ASMD050F ASMD075F ASMD100F ASMD125F ASMD150F ASMD150F/33 ASMD185F ASMD200F ASMD250F W 16.0 0.30 16.0 0.30 P0 4.0 0.10 4.0 0.10 P1 8.0 0.10 12.0 0.10 P2 2.0 0.10 2.0 0.10 A0 5.6 0.23 6.9 0.23 B0 8.1 0.15 9.6 0.15 B1 max 12.1 12.1 D0 1.5 + 0.10/ -.00 1.5 + 0.10/ -.00 F 7.50 0.10 7.50 0.10 E1 1.75 0.10 1.75 0.10 E2 min 14.25 14.25 T max 0.4 0.4 T1 max 0.1 0.1 K0 3.2 0.15 3.4 0.15 A max 330 330 N min 50 50 W1 16.4 + 2.0/-.00 16.4 + 2.0/-.00 W2 max 22.4 22.4 (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/14/19 PolySwitch(R) Resettable PTCs Surface Mount > Automotive ASMD Series Tape and Reel Diagrams P0 D0 T Embossment P2 E1 Cover Tape A0 B1 F W E2 K0 B0 T1 P1 Center Lines of Cavity Figure 1 W2 (Measured at Hub) Cover Tape A N (Hub Dia.) W1 (Measured at Hub) Carrier Tape Embossed Cavity Figure 2 WARNING * Users should independently evaluate the suitability of and test each product selected for their own application. * Operation beyond the maximum ratings or improper use may result in device damage and possible electrical arcing and flame. * These devices are intended for protection against damage caused by occasional overcurrent or overtemperature fault conditions and should not be used when repeated fault conditions or prolonged trip events are anticipated. * Contamination of the PPTC material with certain silicone-based oils or some aggressive solvents can adversely impact the performance of the devices. * Device performance can be impacted negatively if devices are handled in a manner inconsistent with recommended electronic, thermal, and mechanical procedures for electronic components. * PPTC devices are not recommended for installation in applications where the device is constrained such that its PTC properties are inhibited, for example in rigid potting materials or in rigid housings, which lack adequate clearance to accommodate device expansion. * Operation in circuits with a large inductance can generate a circuit voltage (Ldi/dt) above the rated voltage of the device. 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) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/14/19