Fuseology Selection Guide Page 18 Fuseology Selection Guide

Fuseology Selection Guide www.littelfuse.com Fuse and PTC Products Selection Guide (continued) PTC PRODUCTS PTCs (positive temperature coefficient) increase resistance as temperature increases. They are designed to prevent unsafe levels of current while allowing constant safe current levels, and their resistance will "reset" automatically when the current and temperature returns to a safe level. PTCs are typically used in applications where automatic reset is desired. Series Name 1 View Datasheet Order Samples Size 2 Hold Current (I HOLD ) Max Voltage (V MAX ) Max Fault current (I MAX ) Operating Temperature Range Agency Approvals Halogen Free RoHS Lead Free cUR UR TUV Surface Mount: LoRho PTC (Low Resistance) 0402 0.1 - 0.5A 6 / 12 V 50 A 0603 0.5 - 2.0A 0805 0.75 - 3.0A 1206 0.75 - 4.5A 1812 1.9 - 3.7A 2920 7.0A 0603L 0603 (1608) 0.04 - 0.5A 6 - 15 V 40 A 0805L 0805 (2012) 0.10 - 1.10 A 6 - 15 V 100 / 40 A 1206L 1206 (3216) 0.10 - 2.0A 6 - 30 V 100 A 1210L 1210 (3225) 0.05 - 2.0A 6 - 30 V 10 / 100 A 1812L 1812 (4532) 0.1 - 3.0A 6 - 60 V 10 / 20 / 100 A 2016L 2016 (5041) 0.30 - 2.00 A 6 - 60 V 20 / 40 A 2920L 2920 (7351) 0.30 - 3.00 A 6 - 60 V 10 / 40 A 250S 0.13 A 60 V 3 A Radial Leaded: USBR see data sheet 0.75 - 2.50 A 6 / 16 V 40 A 16R 2.50 - 14.00 A 16 V 100 A 30R 0.90 - 9.00 A 30 V 40 A 60R 0.10 - 3.75 A 60 V 40 A 72R 0.20 - 3.75 A 72 V 40 A 250R 0.08 - 0.18 A 250 V 3 / 10 A 600R 0.15 - 0.16 A 600 V 3 A Battery Strap: SL (Low Resistance) 1.9 - 3.7 A 6 V 50 A (1) Detailed information about most product series listed here can be found on our web site. (2) 18

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