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Technical content
chip type resettable fuses
features
- Q uickly breaks extraordinary current
- Sm all size SM D type
- T he least rise in resistance after reflow soldering
- L atched if/w hen extraordinary current continues
- T he least rise in resistance by repeating trips
- U L 143A File N o. E250106
- c-U L C A N /C A S-C 222, N o.0 and T echnical Inform ation L etter N o. C A -3A File N o. E250106 approved
- M arking: G reen body color
- P roducts w ith lead-free term inations m eet EU R oH S and C hina R oH S requirem ents ordering inform ation New Part # dim ensions and construction Protective CoatingElement L aa W h Inner Electrode Outer Electrode L .177±.008 (4.5± 0.2) .126±.008 (3.2± 0.2) .020±.008 (0.5± 0.2) .016±.008 (0.4± 0.2) Wh a D im ensions inches (m m ) SF45 (18 12) Type For further inform ation on packaging, please refer to A ppendix A . EU N : N orm al 45: 4.5 x 3.2m m T : Sn T E: Em bossed plastic tape 45 SF Type Style C haracteristic Term ination M aterial Hold C urrent Packaging N TE T110 050: 0.50A 075: 0.75A 110: 1.1A 245 K O A Speer Electronics, Inc. • 199 Bolivar D rive • Bradford, P A 16701 • U SA • 814-362-5536 • Fax: 814-362-8883 • w w w.koaspeer.com Specifications given herein m ay be changed at any tim e w ithout prior notice. Please confirm technical specifications before you order and/or use. 1/06/09 circuit protection
246 K O A Speer Electronics, Inc. • 199 Bolivar D rive • Bradford, P A 16701 • U SA • 814-362-5536 • Fax: 814-362-8883 • w w w.koaspeer.com Specifications given herein m ay be changed at any tim e w ithout prior notice. Please confirm technical specifications before you order and/or use. 2/22/08 SF chip type resettable fuses Perform ance C haracteristics D erating C urve Tim e to Trip C haracteristics environm ental applications Percentage of Rated Current160 -55 -35 -15 25 45 65 1 255 Ambient Temperature (°C) 85 1 05 140 120 100 R -T C haracteristics Resistance (Ω) 100k 05 01 50 Temperature (°C) 0.1 100 10k 100 Time to Trip (Sec.) .01 .001 0.1 10 100 1 Current (A) .0001 075 110 050 100 1000 Param eter R equirem ent Lim it Test M ethod T rip Endurance U se the device w hich has been left for 15 m inutes or m ore in 25°C set voltage to be applied to the elem ent at m axim um rated voltage. A nd set current to be applied w ithin the range betw een trip current and m axim um rated current W ithout dam age under 24 hours of current sending T rip C ycle L ife (ON -OFF T est) U se the device w hich has been left for 15 m inutes or m ore in 25°C set voltage and current to be applied to m axim um rated voltage and m axim um rated current respectively. A pply rated voltage for 5 seconds and 55 seconds off W ithout dam age after 1000 cycles C old R esistance -40°C ± 3°C , 1000 hours W ithout D am age H eat R esistance 85°C ± 3°C , 1000 hours W ithout D am age H um idity R esistance 85°C ± 3°C , 85% R H , 1000 hours W ithout D am age H eat-C old C ycling -40°C ± 3°C (30 m inutes), +85°C ± 3°C (30 m inutes), 20 cycles W ithout D am age Part D esignation Hold R ating M ax. R ated Voltage (D C V) applications and ratings Trip C urrent (A) Initial R esistance R Type ( Ω) R esistance after Tripping R 1 M ax. ( Ω) M ax. R ated C urrent (A) SF45N050 0.50A SF45N075 0.75A SF45N110 1.10A 15.0 13.2 6.0 -40°C to +85°C Pow er D issipation PD (W ) 0.49 0.24 0.15 1.00 1.50 2.20 0.6 O perating Tem perature R ange 0.85 0.41 0.21 circuit protection