Fuse Mounting Accessories Page 101 Fuse & Mounting Accessories

2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/03/17 Surface Mount Fuses 159 Fuse and Clip Series Average Time Current Curves Temperature Re-rating Curve Maximum Temperature Rise Telecom Nano 2 Fuse Temperature 04611.25 82 o C (180 o F) 0461002 50 o C (122 o F) Electrical Specifications by Item Ampere Rating (A) Amp Code Max Voltage Rating (V) Interrupting Rating Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals 0.50 .500 600 60 A @600 VAC 0.560 0.840 1 x 1.25 600 .1040 16.5 1 x 2.00 002. 600 .0450 17.5 1 x 1 I 2 t is calculated at 10 msecs. or less. I 2 t at 10 times rated current has a typical value of: 24 A 2 sec (2.0A), 22 A 2 sec (1.25A), 1.3 A 2 sec (0.5A). Typical inductance < 40nH up to 500 MHz. Resistance changes 0.5% for every C. Resistance is measured at 10% rated current. 1000 100 10 1 0.1 0.001 0.01 0.1 1 10 100 CURRENT IN AMPERES TIME IN SECONDS 1.25A 2A .500A TIA-968-A (formerly FCC part 68) Surge Waveforms Surge Voltage (V) Waveform (s) Current (A) Repititions Recommended Fuse Metallic A 800 10560 100 1 ea. polarity 1.25 Longitudinal A 1500 10160 200 1 ea. polarity 1.25 Metallic B 1000 9720 25 1 ea. polarity 1.25 Longitudinal B 1500 9720 37.5 1 ea. polarity 1.25 (fuse can not open during type B events) For the type A events the 0.5 fuse will open, providing non-operational compliance. The 1.25 & 2.0 will not open, providing for operational compliance with TIA-968-A type A surge events. Note: 1. Re-rating depicted in this curve is in addition to the standard re-rating of 25% for continuous operation.

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