PolySwitch® Resettable PPTCs Radial Leaded > AHEF Series AHEF Series RoHS Description The AHEF Series is a PPTC resettable device designed specifically for the automotive industry. It is a 32V high-temperature, lead-free, radial leaded resettable device that meets Littelfuse’s Automotive qualification. This qualification is based on AEC-Q200: Stress Test Qualification for Passive Components. Applications • Motor and motor circuit protection including power door- locks, mirrors, lumbar umps, seats, sunroofs and windows • Electronic Control Unit (ECU) I/O protection Features • Heating, Ventilation and Cooling (HVAC) motor and • Overcurrent and overvoltage circuit protection devices I/O protection • Resettable and single-use overcurrent devices • Telematics, infotainment and navigations systems • Wide range of form factor and termination methods • Liquid Crystal Display (LCD) back-light heaters • Products meet applicable automotive industry standards • Power and cigarette lighter outlets, plugs and adapter/chargers • Devices compatible with high-volume electronics • Powered networks and buses assembly • Air-flow detection and overcurrent protection in HVAC • RoHS compliant, Lead-Free and Halogen-Free and cooling fan systems • Stall detection in express window and sunroof circuits Additional Information • Resettable overcurrent protection for power distribution, electrical centers and junction boxes • Wire downsizing • Motor electromagnetic interference (EMI) suppression Datasheet Resources Samples • Electrostatic discharge (ESD) damage protection • Load dump and other transient voltage protection Electrical Characteristics I (A)@ I (A)@ I V I P Max Time-to-trip R R R Part H H T MAX MAX D Typ MIN MAX 1MAX Lead Size Number (mm2/AWG) (R ) (R ) (A) (V ) (A) (W) (A) (s) (Ω) (Ω) (Ω) 1MAX aMAX DC AHEF (High Temperature) – 32V AHEF050 0.5 0.5 1.0 32 100 0.9 2.5 3.0 0.3500 1.100 1.100 0.205/24 AHEF070 0.7 0.7 1.4 32 100 1.4 3.5 3.2 0.2300 0.800 0.800 0.205/24 AHEF100 1.0 1.0 1.9 32 100 1.4 5.0 6.2 0.1500 0.430 0.430 0.205/24 AHEF300 3.0 3.0 6.0 32 100 3.2 15.0 5.0 0.0350 0.110 0.110 0.52/20 AHEF500 5.0 5.0 10.0 32 100 5.3 25.0 9.0 0.0150 0.040 0.040 0.52/20 AHEF750 7.5 7.5 15.0 32 100 6.5 37.5 13.0 0.0074 0.023 0.023 0.52/20 AHEF1000 10.0 10.0 20.0 32 100 7.0 50.0 15.0 0.0060 0.016 0.016 0.82/18 Notes: I : Hold current: maximum current device will pass without interruption in 25°C, R : Minimum resistance of device as supplied at 25°C, unless otherwise specified. H unless otherwise specified. RMIN : Maximum resistance of device when measured one hour post trip at 25°C unless I : Trip current: minimum current that will switch the device from low-resistance to 1MAX otherwise specified. T high-resistance in 25°C still air, unless otherwise specified. R : Maximum functional resistance of device after being subjected to the stresses V : Maximum voltage device can withstand without damage at rated current. aMAX described in PS400 at 25°C, unless otherwise specified. MAX I : Maximum fault current device can withstand without damage at rated voltage. R : Minimum functional resistance of device after being subjected to the stresses PMA X : Power dissipated from device when in the tripped state in 25°C still air, aMIN described in PS400 at 25°C, unless otherwise specified. D unless otherwise specified. * Electrical characteristics determined at 25°C. © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/31/19

PolySwitch® Resettable PTCs Radial Leaded > AHEF Series Temperature Rerating Maximum Ambient Temperature -40°C -20°C 0°C 20°C 25°C 40°C 50°C 60°C 70°C 85°C 125°C Hold Current (A) AHEF (High Temperature) – 32V AHEF050 0.7 0.6 0.60 0.5 0.5 0.4 0.400 0.40 0.30 0.300 0.1 AHEF070 1.0 0.9 0.80 0.7 0.7 0.6 0.600 0.50 0.50 0.400 0.2 AHEF100 1.4 1.2 1.10 1.0 1.0 0.9 0.800 0.70 0.70 0.600 0.2 AHEF300 4.1 3.8 3.42 3.1 3.0 2.7 2.430 2.22 1.98 1.650 0.6 AHEF500 6.8 6.3 5.70 5.2 5.0 4.5 4.050 3.70 3.30 2.750 1.0 AHEF750 10.2 9.4 8.55 7.7 7.5 6.7 6.075 5.55 4.95 4.125 1.5 AHEF1000 13.6 12.5 11.40 10.3 10.0 8.9 8.100 7.40 6.60 5.500 2.0 Temperature Rerating Curve 200 nt e urr 150 C p Tri d n a d 100 ol H d e at R of 50 % 0 -40 -20 0 20 40 60 80 100 120 Ambient Temperature (˚C) Part Ordering Number System AHEF 300 -2 Packaging Option (Blank) = Bulk 2 = Tape and Reel Packaging AP = Ammo Pack Hold Current Indicator Product Series An “F” at the End of the Series Indicates Pb-free Version of Product © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/31/19

PolySwitch® Resettable PPTCs Radial Leaded > AHEF Series Typical Time-to-Trip Curves at 25°C AHEF 1000 A = AHEF050 B = AHEF070 E 100 C = AHEF100 F G D = AHEF300 A B C D s) E = AHEF500 p ( 10 F = AHEF750 Tri o- G = AHEF1000 e-t m 1 G Ti F E 0.1 D 0.01 1 10 A B C 100 Fault Current (A) Physical Specifications AHEF050 to AHEF100 : Tin-plated Copper-clad Steel, 0.205mm2 (24 AWG), ø 0.51mm/0.020in. Lead Material AHEF300 to AHEF750 : Tin-plated Copper 0.52mm2 (20 AWG), ø 0.81mm/0.032in AHEF1000 : Tin-plated Copper 0.82mm2 (18 AWG), ø 1.0mm/0.04in Soldering Characteristics Solderability per ANSI/J-STD 002 Category 3 Solder Heat Withstand Per IEC 68-2-20, Test Tb, Method 1a, Condition b; Can Withstand 10 s at 260°C ± 5°C Insulating Material Cured, Flame-retardant Epoxy Polymer; Meets UL 94V-0 Requirements Operation Temperature -40°C~125°C Note: See PS400 for other physical characteristics. Devices are not designed to be placed through a reflow process. Environmental Specifications Test Conditions Resistance Change 70°C, 1000 hrs ±5% Passive Aging 85°C, 1000 hrs ±5% Humidity Aging 85°C, 85% R.H., 1000 hrs ±5% Thermal Shock 125°C, -40°C 10 times ±5% Solvent Resistance MIL-STD-202, Method 215F No change Note: See PS400 for other environmental specifications. Moisture Resistance Level Level 1, J-STD-020 40°C max, 70% RH max; devices should remain in original sealed bags prior to use. Storage Conditions Devices may not meet specified values if these storage conditions are exceeded. © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/31/19

A A E E B B C C C C F F B B H H B B G G G DG D D A E D A E D A E D A E F F C C F F CL CL CL CLCLCL CLCL A E C A E B C A A E E F B H B G PolySwitch® ReCsettable PTCs B F B C H Radial LeadeBd > AJHEF SerGiJes A AC E AC G D B B D A E D A E F J J E E H H C F G D D E D A E F B CL CL DCLCL C D C A CL C CL CLFCL G D F D CLEC CL B CL CCLCLFCL CLFCLH D A E B F G A E Dimension Figures A C F A E A A E E CL CL A CLCLA E E A B J C J A E H J C B B B B B C B CF B IF I D E(x2F)igure 4E(x2) A E J E H A A C F D D D D D G GHA H D D B CL CL CL CL J C C F C C F F C C F F CL CL CL CL CLtoCL CLtoCCLLCL CL CL CLtoCL CLtoJCLCLCL CLCL E H A E A D E Figure 1 Figure 2 Figure 3 Figure 5 C F A E A E Dimensions F F A A B B B CL CL B CL CL C B F I E(x2) E(x2) E(x2) I I A B B C BPart F CI C Dimensions in CMillAimetersC (IncheEs) A D E D G H D E(x2) A B C D E F G H J Figure D D G NumbeHr MinG AHMaxB MGinHD MBax MAin MaxAAGDRMF i n(HighM TaDexmpMeriantDureMB) –a x32VMDin EMax MiEn Max CLTtCoyCpL BTyp CLFCL C B CLFtCoCL I CLFCL C F C F 7.4 12.7 4.3 5.8 7.6 3.3 E(x2) CLtoCL CL CL CLtoCL CLCL AHEF050 — (0.29) — (0.50) (0.17) (0.23) (0.30) — — (0.13) — — — — — — 1,4,5 A 6.9 10.8 4.3 5.8 7.6 D3.0 F D G H A B D AHEF070 — — — — — — — — — — 2,4,5 (0.27) (0.43) (0.17) (0.23) (0.30) C (0.12) F E(x2) C F I F A B AHEF100 — 9.7 — 13.6 4.3 5.8 7.6 — CLto—CL 3.0 CL CL— — —C — CLto—CL — CLCL1,4,5 C (0.38) (0.54) (0.17) (0.23) (0.30) (0.12) E(x2) I B C C AHEF300 — 10.2 — 15.5 4.32 5.84 7.6 — — 3.8 — — — — — —A 3,4,5 D E (0.40) (0.61) (0.17) (0.23) (0.30) (0.15) F G H A B D B 14.0 24.1 4.3 5.8 11.5 3.8 A D E AHEF500 — (0.55) — (0.95) (0.17) (0.23) (0.45) E(—x2) — (0.15) —I — — — — — 3,4,5 C G H D C 21.1 24.9 9.4 10.9 7.6 3.8 AHEF750 — — — — — — — — — — 3,4,5 (0.83) (0.98) (0.37) (0.43) (0.30) (0.15) B 23.5 27.9 9.4 10.9 7.6 4.0 A D E AHEF1000 — — — — — — — — — — 3,4,5 (0.93) (1.10) (0.37) (0.43) (G0.3H0) (0.16) D Packaging and Marking Information Part Bag Tape and Reel Ammo Pack Standard Package Part Agency Number Quantity Quantity Quantity Quantity Marking Recognition AHEF (High Temperature) – 32V AHEF050 500 — — 10,000 E0.5 * AHEF070 500 — — 10,000 E0.7 * AHEF100 500 — — 10,000 E1 * AHEF300 500 — — 10,000 E3 * AHEF500 250 — — 5,000 E5 * AHEF750 250 — — 5,000 E7.5 * AHEF1000 250 — — 5,000 E10 * *These devices are intended for use in automotive applications. © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/31/19

PolySwitch® Resettable PPTCs Radial Leaded > AHEF Series Tape and Reel Specifications AHEF devices are available in tape and reel packaging per EIA468-B/IEC286-2 and EIA 481-2 standards. See Figures 1 and 2 for details. Description EIA Mark Dimension (mm) Tolerance Carrier Tape Width W 18.0 -0.5/+1.0 Hold Down Tape Width W 11.0 Minimum 4 Top Distance between Tape Edges W 3.0 Maximum 6 Sprocket Hole Position W 9.0 -0.5/+0.75 5 Sprocket Hole Diameter D 4.0 ±0.2 0 Abscissa to Plane (Straight Lead) (AHEF300 to AHEF1000) H 20.3 ±0.5 Abscissa to Plane (Kinked Lead) (AHEF050 to AHEF100) H 20.3 ±0.5 0 Abscissa to Top (AHEF050 to AHEF300) H 32.2 Maximum 1 Abscissa to Top (AHEF500 to AHEF1000) H 45.0 Maximum 1 Overall Width with Lead Protrusion (AHEF050 to AHEF300) C 43.2 Maximum 1 Overall Width with Lead Protrusion (AHEF500 to AHEF1000) C 55.0 Maximum 1 Overall Width without Lead Protrusion (AHEF050 to AHEF300) C 42.5 Maximum 2 Overall Width without Lead Protrusion (AHEF500 to AHEF1000) C 54.0 Maximum 2 Lead Protrusion L 1.0 Maximum 1 Protrusion of Cut-out L 11.0 Maximum Protrusion Beyond Hold-Down Tape I Not specified — 2 Sprocket Hole Pitch P 12.7 ± 0.3 0 Device Pitch (AHEF050 to AHEF300) — 12.7 ± 0.3 Device Pitch (AHEF500 to AHEF1000) — 25.4 ± 0.6 Pitch Tolerance — 20 consec. ± 0.1 Tape Thickness t 0.9 Maximum Overall Tape and Lead Thickness (AHEF050 to AHEF750) t 2.0 Maximum 1 Overall Tape and Lead Thickness (AHEF1000) t 2.3 Maximum 1 Splice Sprocket Hole Alignment — 0 ± 0.3 Body Lateral Deviation h 0 ± 1.0 Body Tape Plane Deviation p 0 ± 1.3 Ordinate to Adjacent Component Lead (AHEF050 to AHEF500) P 3.81 ± 0.7 1 Ordinate to Adjacent Component Lead (AHEF750 to AHEF1000) P 7.62 ± 0.7 1 Lead Spacing (AHEF050 to AHEF500) F 5.05 ± 0.75 Lead Spacing (AHEF750 to AHEF1000) F 10.15 ± 0.75 Reel Width (AHEF050 to AHEF300) w 56.0 Maximum 2 Reel Width (AHEF500 to AHEF1000) w 63.5 Maximum 2 Reel Diameter A 370.0 Maximum Space between Flanges* (AHEF050 to AHEF300) w 48.0 Maximum 1 Space between Flanges* (AHEF500 to AHEF1000) w 55.0 Maximum 1 Arbor Hold Diameter c 26.0 ±12.0 Core Diameter* n 91.0 Maximum Box — 64/372/362 Maximum Consecutive Missing Places — None — Empty Places per Reel — 0.1% Maximum *Differs from EIA specification. © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/31/19

PolySwitch® Resettable PTCs Radial Leaded > AHEF Series Tape and Reel Diagrams (cid:31)h (cid:31)h (cid:31)p (cid:31)p Reference Plane H1 P1 H1 C2 F H C1 L A B W4H0 W5 W I2 L1 P0 D0 Direction of Unreeling Figure 1 Cross Section A-B t Reel Upper Side n Tape a Direction of Unreeling Lower Side c w 1 Cross Section w 2 Optional Shape: Circular or Polygonal 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. © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/31/19