Battery Protector Surface Mount > ITV9550 Series ITV9550 45A Series Description ITV9550 Series is a chip type surface mountable device that can protect against both overcurrent and overcharging. It comprises a fuse element to ensure stable operation under normal electrical current and to cut off the current when overcurrent occurs. It also comprises a resistive heating element that could be used in combination with a voltage detecting means, such as IC and FET. When overvoltage is detected, the heating element is electrically excited to generate heat to blow the fuse element to achieve overvoltage protection. Agency Approvals Features AGENCY AGENCY FILE NUMBER AMPERE RANGE Halogen Free Protection for both overcurrent and Surface Mount E10480 45 A overcharging Fast response TBD 45 A Applications Thermal Derating Characteristics Vacuum cleaner E-bike Ambient Operating Temperature P ower tools UPS 25C 40C 60C E-scooter Recommend Rated Current (A) 49.0 44.5 37.0 Electrical Characteristics Agency Resistance Approvals I Cells in V I V rated max break OP Part Number Ordering Code (A) Series (Vdc) (A) (V) R R heater fuse () (m) ITV9550L1245 ITV9550L1245MR 45 3 62 120 9.8 ~ 13.5 1.9 ~ 3.4 0.4 ~ 2.0 X X ITV9550L1445 ITV9550L1445MR 45 4 62 120 13.0 ~ 18.4 3.4 ~ 6.0 0.4 ~ 2.0 X X ITV9550L2045 ITV9550L2045MR 45 5 62 120 16.7 ~ 23.5 5.6 ~ 9.9 0.4 ~ 2.0 X X ITV9550L3045 ITV9550L3045MR 45 6~7 62 120 22.3 ~ 31.5 10.0 ~ 17.7 0.4 ~ 2.0 X X ITV9550L4045 ITV9550L4045MR 45 9~10 62 120 33.0 ~ 46.9 22.0 ~ 38.7 0.4 ~ 2.0 X X ITV9550L5045 ITV9550L5045MR 45 12~14 62 120 43.7 ~ 62.0 38.5 ~ 68.0 0.4 ~ 2.0 X X Current Capacity 100% x I rated No Melting Cut Time 200% x I rated < 1 min Interrupting Current 150A, power on 5 ms, power off 995 ms, 10000 cycles No Melting Over Voltage Operation In operation voltage range, the fusing time is <1min. Notes: I = Cur rent carrying capacity that is measured at 40C thermal equilibrium condition rated I = The current that the fuse element is able to interrupt break V = The maximum voltage that can be cut off by fuse max V = Range of operation voltage OP R = The resistance of the heating element heater R = The resistance of the fuse element fuse Cells in series = Number of battery cells connected in series in the circuit for ITV device to protect. Value specified is determined by using the PWB with 25mm*2oz copper traces, AWG8 covered wire, and 0.6mm glass epoxy PCB. Specifications are subject to change without notice. 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/27/20Battery Protector Surface Mount > ITV9550 Series Cut Time by Heater Operation Various heater wattage at 25C ambient temperature Constant heater wattage at various ambient temperature 100 100 33W 100W 10 10 1 1 0.1 0.1 -20 0 20 40 60 80 100 0 20 40 60 80 100 120 Ambient Temperature (C) Power (W) Cut Time by Current Operation Various interrupting current at 25C ambient temperature Constant 2x rated current at various ambient temperature 100 100 10 1 10 0.1 0.01 0.001 1 0 50 100 150 200 250 300 350 -20 0 20 40 60 80 100 Interrupting Current (A) Ambient Temperature (C) Environmental Specifications Storage 0~35C, 70%RH Temperature 3 months after shipment Operating -10C to +65C Temperature Hot Passive Aging 1005C, 250 hours No structural damage and functional failure Humidity Aging 60C2C, 90~95% R.H. 250 hours No structural damage and functional failure Cold Passive -203C, 500 hours Aging No structural damage and functional failure Thermal Shock MIL-STD-202 Method 107G +125C/-55C, 100 times No structural damage and functional failure 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/27/20 Cut Time (s) Cut Time (s) Cut Time (s) Cut Time (s)