PRODUCT SELECTION & COMPARISON PRODUCT SELECTION & COMPARISON S f Surface Mount Chip Fuses M t Chi F NIC Components Corp. www.NICcomp.com | Page 1 PRODUCT TRAINING SMT Fuses SMT Fuses Fuse is over‐current protection device Under adverse over‐current conditions the fuse operates to ‘open’ and protect U d d di i h f ‘ ’ d the electronic equipment from damage due to excessive current flow The goal in selection the proper fuse is to select device rating which will g p p g operate trouble‐free until adverse conditions occur In ideal case, need to know the following information to make the best fuse selection 1. 2. 3. 4. 5. 6. 7. NIC Components Corp. Circuit voltage (VDC or VAC) Nominal operating current Interrupting Rating Ambient Temperature Overload Conditions & Opening Times Maximum available fault current Inrush, Pulse or Surge current waveform www.NICcomp.com | Page 2 PRODUCT TRAINING SMT Fuses SMT Fuses 1.) Circuit Voltage & Voltage Rating: Maximum operating voltage should not exceed the fuse rated voltage NFVC6125F = 125VAC/160VDC (up to 10A); 65VAC/ (above 10A) NFVC6125F = 125VAC/160VDC (up to 10A); 65VAC/ (above 10A) NFVC6125H = 250VAC (all ratings) NFVC6125S = 125VAC (all ratings) Rule of thumb ‐ DO NOT use 125VAC rated fuse in circuit application operating at greater than 125VAC 2.) Normal Operating Current Fuses must function without opening, under rated current conditions (rated current @ +25Ԩ) for a least 4 hours Rule of thumb operate at no more than 75% of fuse current rating @ +25 Rule of thumb ‐ operate at no more than 75% of fuse current rating @ +25Ԩ 3.) Interrupt Rating: Interrupt rating can also be referenced as 'breaking capacity' or 'short circuit rating‘ of the f fuse, and is a safety rating for the maximum current that can safely be interrupted by the fuse di f t ti f th i t th t f l b i t t d b th f under rated voltage. Rule of thumb ‐ A fuse with a low interrupting rating should NOT be used in circuit applications where higher fault current could exist, as the fuse could fail potentially cause a safety hazard (i.e. arcing, fire or fracture) upon opening fracture) upon opening NIC Components Corp. www.NICcomp.com | Page 3 PRODUCT TRAINING SMT Fuses SMT Fuses 4.) Ambient Temperature: When operating at temperatures above or below +25Ԩ, please refer to the temperature derating curve found on product specifications f g f f g p g p Rule of thumb – Derate the current rating of the fuse with increasing operating temperature 5.) Overload Conditions and Opening Times: Electrical overload condition is abnormal excessive current flow condition within the electrical circuit which exceeds the circuit’ss normal full load current condition. circuit, which exceeds the circuit normal full load current condition For fuses, the first overload condition point is typically 200% to 300% of fuse current rating Overload curve, at left, shows 1.0A fuse opening in one second with between 200% ~ 300% (2.0A ~ 3.0A) applied NIC Components Corp. www.NICcomp.com | Page 4 PRODUCT TRAINING SMT Fuses SMT Fuses 6.) Maximum Available Fault Current: (as referenced in #3 above) The interrupt rating of the fuse must meet or exceed the maximum fault current of the circuit. Rule of thumb ‐ A fuse with a low interrupting rating should NOT be used in circuit applications where higher fault current could exist, as the fuse could fail potentially cause a safety hazard upon opening 7.) Pulse Current Characteristics ) Transient pulse current is used to describe current waveform shapes resulting from start‐up, in‐rush, pulse, surge or transient currents within a circuit. Transient pulse currents will produce thermal cycling and possible mechanical failure of the fuse. Capability of a fuse to withstand surge pulse conditions can be determined from the I2t characteristics of the fuse. Melting I2t, is the thermal energy level causing melting (opening) of the fuse element. Fuse component size, materials and construction will establish the I2t characteristics of the fuse. Rule of thumb ‐ Slow blow type fuses are suggested for high in‐rush and pulse current applications Rule of thumb. The circuit designer needs to properly size the fuse based upon the fuse melting I2t value b i being greater than the pulse current I t th th l t I2t divided by the pulse factor Fp t di id d b th l f t F (see page 7) ( 7) … Typically the selected T i ll th l t d 2 2 fuse should have melting I t value much greater than the I t value of the pulse (See pages 6 & 7) NIC Components Corp. www.NICcomp.com | Page 5 PRODUCT TRAINING SMT Fuses SMT Fuses 7.) Pulse Current Characteristics Use the correct formula, shown above, to determine the required I2t characteristics of the fuse NIC Components Corp. www.NICcomp.com | Page 6 PRODUCT TRAINING SMT Fuses SMT Fuses 7.) Pulse Current Characteristics Pulse factor ‘Fp’ Correct the I2t required, based upon the number of pulse cycles as seen by the fuse (see above curve) Example: 1000 cycles derate I2t to 50% 2t to 25% Example: 100,000 cycles derate I l l d NIC Components Corp. www.NICcomp.com | Page 7 PRODUCT TRAINING SMT Fuses SMT Fuses Fuse Selection (non‐pulse applications) Establish the circuit values: operating current, in‐rush current waveform and determine operating temperature Use derating factors : Temperature Derating ① Derate 75% ((0.75)) ② Derate for temperature factor EExample: l Operating 1.3A @ + 80Ԩ 1.3A / 0.75 / 0.91 = 1.905A + 80Ԩ NIC Components Corp. www.NICcomp.com | Page 8 PRODUCT TRAINING SMT Fuses SMT Fuses Fuse Selection (pulse applications) Establish the circuit values: operating current, in‐rush current waveform and determine operating temperature Pulse Example: 1.905A Calculate I2t needed based upon pulse type (see page 6), and correct I2t for number of pulses t for number of pulses (see page 7) (see page 7) Pulse Example: 100K pulses 4Amp square wave for 10mS 100K pulses 4Amp square wave for 10mS I2t = (4A)2 x 10mS = 0.16 Use derating factors : ① Derate 75% ((0.75)) ② Derate for temperature factor Corrected for 100K pulses (Fp = 25%) = 0.64 Select fuse with I2t >0.64 Temperature Derating EExample: l Operating 1.3A @ + 80Ԩ 1.3A / 0.75 / 0.91 = 1.905A + 80Ԩ NIC Components Corp. www.NICcomp.com | Page 9 PRODUCT TRAINING SMT Fuses SMT Fuses Operating 1.3A @ + 80Ԩ 1.3A / 0.75 / 0.91 = 1.905A Pulse Example: 100K pulses 4Amp square wave for 10mS I2t = (4A)2 x 10mS = 0.16 Corrected for 100K pulses = 0.64 Corrected for 100K pulses Select fuse with I2t >0.64 Suggested PN: NFVC6125F2R00TRF 2.0A rated with I2t of 1.34 (A2S) NIC Components Corp. www.NICcomp.com | Page 10 SMT Fuses Types Thick Film Wire‐In‐Air Ceramic body Solder dome Termination (Cap) NFVC series NFCC / / NFHC NFHC / / NFSC NFSC series series Melting wire Thick Film construction advantages Wire‐In‐Air construction advantages Consistent melting characteristic Length and diameter of the melting wire can be adjusted to meet many different applications Excellent inrush capability Good lightning immunity (1.2KV lightning test) NIC Components Corp. Small size Low Profile Lower Cost Range of current ratings offered www.NICcomp.com | Page 11 SMT Fuses Types Technology NFCC / / NFHC NFHC / / NFSC NFSC series Thick Film NFVC series Wire‐In‐Air Wire In Air (WIA) Typical Case Sizes 1206, 0805, 0603, 0402 Wire‐In‐Air 2410 (6125) Wire‐In‐Air Voltage Rating High Current Rating Anti‐Inrush (I2t) Size (small) Thickness (low profile) C t Cost Automated Production NIC Components Corp. Thick Film Thick Film ‐ ‐ ‐ Thick Film Thick Film Thin Film ‐ ‐ www.NICcomp.com | Page 12 NEW NIC P t N b NIC Part Numbers NFVC6125F1R00TRF Metric Size 6125 English g Rated Current Rated Size (A) Voltage(VAC) 2410 1 125 Fusing g Type fast Litt lf Littelfuse B Bussmann KOA AEM C Conquer 0451 001. 6125FF1‐R CCF1NTE1 AF2‐1.00V125T SEF 001 AF2‐1.25V125T NFVC6125F1R25TRF 6125 2410 1.25 125 fast 0451 1.25 6125FF1.25‐R CCF1NTE1.25 NFVC6125F1R60TRF 6125 2410 1.6 125 fast 0451 01.6 6125FF1.5‐R CCF1NTE1.6 NFVC6125F2R00TRF 6125 2410 2 125 fast 0451 002. 6125FF2‐R CCF1NTE2 AF2‐2.00V125T SEF 002 NFVC6125F2R50TRF 6125 2410 25 2.5 125 f t fast 0451 02 5 0451 02.5 6125FF2 5 R 6125FF2.5‐R CCF1NTE2 5 CCF1NTE2.5 AF2 2 50V125T AF2‐2.50V125T SEF 2 50 SEF 2.50 NFVC6125F3R15TRF 6125 2410 3.15 125 fast 0451 3.15 6125FF3‐R CCF1NTE3.15 AF2‐3.15V125T SEF 003 NFVC6125F4R00TRF 6125 2410 4 125 fast 0451 004. 6125FF4‐R CCF1NTE4 AF2‐4.00V125T SEF 004 NFVC6125F5R00TRF 6125 2410 5 125 fast 0451 005. 6125FF5‐R CCF1NTE5 AF2‐5.00V125T SEF 005 NFVC6125F6R30TRF 6125 2410 6.3 125 fast 0451 06.3 6125FF6.3‐R CCF1NTE6.3 AF2‐6.30V125T SEF 006 NFVC6125F7R00TRF 6125 2410 7 125 fast 0451 007. 0451 007. 6125FF7‐R 6125FF7 R AF2‐7.00V125T AF 7.00V 5T SEF 007 SEF 007 NFVC6125F8R00TRF 6125 2410 8 125 fast 0451 008 6125FF8‐R CCF1NTE8 AF2‐8.00V125T SEF 008 NFVC6125F10R0TRF 6125 2410 10 125 fast 0451 010. 6125FF10‐R CCF1NTE10 AF2‐10.0V125T SEF 010 NFVC6125F12R0TRF 6125 2410 12 65 fast 0451 012. 6125FF12‐R AF2‐12.0V125T SEF 012 NFVC6125F15R0TRF 6125 2410 15 65 fast 0451 015. 6125FF15‐R AF2‐15.0V125T SEF 015 NFVC6125F20R0TRF 6125 2410 20 65 fast NIC Components Corp. SEF 1.50 AF2‐20.0V125T www.NICcomp.com | Page 13 2410 Rated Rated Current (A) 1 Rated Rated Voltage (VAC) 250V 2410 1.25 250V 6125 2410 1.5 250V 6125 2410 16 1.6 6125 2410 2 6125 2410 2.5 250V High Inrush NA NA 6125 2410 3 250V High Inrush NA NA 6125 2410 3.15 250V High Inrush NA NA 6125 2410 3.5 250V High Inrush NA NA 6125 2410 4 250V High Inrush NA 6125 2410 5 250V High Inrush NIC Part Numbers Size Size NFVC6125S1R00TRF NFVC6125S1R25TRF NFVC6125S1R50TRF NFVC6125S1R60TRF NFVC6125S2R00TRF NFVC6125S2R50TRF NFVC6125S3R00TRF NFVC6125S3R15TRF NFVC6125S3R50TRF NFVC6125S4R00TRF NFVC6125S5R00TRF 6125 2410 6125 2410 1.25 125V High Inrush NA NA NA NA 6125 2410 1.5 125V High Inrush 0452 01.5 6125TD1.5‐R NA High InRushNA 6125 2410 1.6 125V High Inrush NA NA NA NA NA 6125 2410 2 125V High Inrush 0452 002. 6125TD2‐R NA NA SET 002 6125 2410 25 2.5 125V High Inrush High Inrush 0452 02 5 0452 02.5 6125TD2 5 R 6125TD2.5‐R NA NA SET 2 50 SET 2.50 6125 2410 3 125V High Inrush 0452 003. 6125TD3‐R NA NA SET 003 6125 2410 3.15 125V High Inrush NA NA NA NA SET 3.15 6125 2410 3.5 125V High Inrush 0452 03.5 6125TD3.5‐R NA NA SET 3.50 6125 2410 4 125V High Inrush 0452 004. 6125TD4‐R NA NA SET 004 6125 2410 5 125V High Inrush 0452 005. 6125TD5‐R NA NA SET 005 NIC Part Numbers Size Size NFVC6125H1R00TRF NFVC6125H1R25TRF NFVC6125H1R50TRF NFVC6125H1R60TRF NFVC6125H2R00TRF NFVC6125H2R50TRF NFVC6125H3R00TRF NFVC6125H3R15TRF NFVC6125H3R50TRF NFVC6125H4R00TRF NFVC6125H5R00TRF 6125 6125 NIC Components Corp. Fusing Type Littelfuse Bussmann KOA AEM Conquer High Inrush NA NA NA MF2410F1.000TM CQ24PT 001 High Inrush NA NA NA MF2410F1.250TM NA High Inrush NA NA NA NA CQ24PT 1.50 250V High Inrush High Inrush NA NA NA MF2410F1 600TM MF2410F1.600TM NA 250V High Inrush NA NA NA MF2410F2.000TM CQ24PT 002 NA NA CQ24PT 2.50 NA NA CQ24PT 003 NA NA NA NA NA NA NA NA NA CQ24PT 004 NA NA NA NA CQ24PT 005 Fusing Type Littelfuse Bussmann KOA AEM Conquer High Inrush 0452 001. 6125TD1‐R NA NA SET 001 Rated Rated Current Voltage (VAC) (A) 1 125V High InRush www.NICcomp.com | Page 14 NA SET 1.50 NFCC & NFHC Series Secondary Voltage (low voltage; fast acting) Chip Fuses COMPETITORS / CHIP FUSES: Belfuse Fast acting C2Q (0603) / C1Q (1206) ... Slow blow C1S (1216) Cooper Bussman CC06 / CC12H / 3216FF p / / Vishay MFU Series ‐ 0402 / 0603 / 0805 / 1206 / & TFU 0603 NIC Components Corp. JDYX2.E302168 Fuses, Supplemental – Component www.NICcomp.com | Page 15 NSFC Series S Secondary Voltage (low voltage; 32V; slower acting) Chip Fuses d V lt (l lt 32V l ti ) Chi F JDYX2.E302168 Fuses, Supplemental ‐ Component NIC Components Corp. www.NICcomp.com | Page 16 PRODUCT COMPARISON NIC Components NFVC6125 NIC Components NFVC6125 to to Littelfuse Littelfuse 0451 Comparison DESC: Fast Acting SMT Fuses Technology Specifications Structure & Dimensions Structure & Dimensions DCR / 2In / I2T / Thermal Shock / Surface Temperature Rise Summary NIC Components Corp. www.NICcomp.com | Page 17 Comparison Company NIC Littelfuse P/N NFVC6125F1R00TRF 0451001.MRL Structure Advantage Disadvantage NIC Components Corp. 1.Excellent thermal conductivity 1 Excellent thermal conductivity 2.Excellent anti‐surge capability 3. Stable fusing time and good reliability. 4.Excellent solder ability 5.Low surface temperature rise 6.Full automated production line 1. Production capacity 1.Excellent thermal conductivity 2. Stable fusing time and good reliability 3.Excellent solder ability 1. High g surface temperature rise f p 2. Long Lead‐time 3. Non‐automated production line www.NICcomp.com | Page 18 Comparison: Structure & Dimensions Structure Comparison Table for 1A Rating NIC Litt lf Littelfuse C Ceramic i C Ceramic i Curved wire Curved‐wire Curved wire Curved‐wire External View FINDING: Similar Construction Internal View Wire Structure 1.Dimension Specification Company L(mm) W(mm) T(mm) t(mm) NIC 6 1±0 20 6.1±0.20 2 50±0 10 2.50±0.10 2 50±0 1 2.50±0.1 1 40±0 10 1.40±0.10 Littelfuse 6.1 2.69 2.69 1.45 2. Component Measurement Company L(mm) W(mm) T(mm) t(mm) NIC 6.00 2.56 2.55 1.33 Littelfuse 6.00 2.57 2.57 1.42 NIC Components Corp. FINDING: Same size Same PCB footprint and same PCB layout www.NICcomp.com | Page 19 Comparison: Specifications Rated Voltage(V) Nominal DCR (Ω) I2t (A2S) Interrupting Voltage (AC/DC) Company PN AMP (A) NIC NFVC6125F1R00TRF 1 125V AC 160V DC 0.080 0.56 125/160 Litt lf Littelfuse 0451001 MRL 0451001.MRL 1 125V AC 125V DC 0 153 0.153 0 459 0.459 125/125 Advantage: NIC NFVC d Lower DCR Higher I Higher I2t t NIC Components Corp. www.NICcomp.com | Page 20 Comparison: Typical DCR 1.DCR Spec. Company PN AMP(A) Nominal DCR(Ω) NIC NFVC6125F1R00TRF 1 0.080 Littelfuse 0451001.MRL 1 0.153 2.Typical DCR Measurements; n = 20 300.00 Little F se 04511001 MRL Little Fuse 04511001.MRL DC Resistance (mΩ) 250.00 200.00 150.00 NIC NFVC6125F1R00TRF 100.00 50.00 0 00 0.00 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 FINDING: NIC NFVC6125F1R00TRF has lower DCR than Littelfuse 04511001.MRL NIC Components Corp. www.NICcomp.com | Page 21 Comparison: Typical I2T Company p y NIC Littelfuse f Spec. I2T 0.56 (A2S) 0.459 (A2S) I2T = The thermal energy level causing melting (opening) of the fuse element. melting (opening) of the fuse element. Test Condition: 10 A Current Test Result NIC Littelfuse sample 10In (mS) I2t (A2S) 10In (mS) I2t (A2S) 1 5.560 0.556 3.76 0.376 2 5.480 0.548 4.08 0.408 3 5.380 0.538 4.08 0.408 4 5.220 0.522 3.92 0.392 5 5.060 0.506 4.24 0.424 Avg. 5.34 0.542 4.02 0.402 FINDINGS: I2T of NIC NFVC6125F1R00TRF is better than Littelfuse 451 T of NIC NFVC6125F1R00TRF is better than Littelfuse 451 NIC NFVC6125F1R00TRF has better anti‐surge capability NIC Components Corp. www.NICcomp.com | Page 22 Comparison: Typical Fusing Time Test Condition Loading current = 2A Spec: 2In rated current ≤ 5 Seconds Test Result Time: Seconds S/N NIC Littelfuse 1 0.210 0.102 2 0.210 0.122 3 0.195 0.115 4 0.248 0. 48 0.140 5 0.203 0.132 Avg. 0.213 0.122 FINDINGS: Fusing times are very similar … all less than 0.5 seconds NIC Components Corp. www.NICcomp.com | Page 23 Comparison: Thermal Shock DCR Change with Thermal Cycle Test Condition 5 Cycles between ‐55Ԩ/+125Ԩ, 60 minutes @ each extreme NIC Littelfuse NFVC6125F1R00TRF 0451001.MRL S/N initial after change(%) initial after change(%) 1 84.14 83.90 ‐0.29% 138.2 138.6 0.29% 2 83.79 83.53 ‐0.31% 136 136.4 0.29% 3 82.91 82.77 ‐0.17% 152.8 153.4 0.39% 4 82.65 82.48 ‐0.21% 140.4 140.9 0.36% 5 79.74 79.48 ‐0.33% 131 131.6 0.46% MIN 79.74 79.48 ‐0.17% 131 131.6 0.29% MAX 84.14 83.90 ‐0.33% 152.8 153.4 0.46% AVG 82.65 82.43 0.26% % 139.68 140.18 0.36% % FINDINGS: NIC NFVC has better thermal cycle performance than Littelfuse 451 NIC NFVC has better thermal cycle performance than Littelfuse 451 NIC Components Corp. www.NICcomp.com | Page 24 Comparison: Surface Temperature Rise Test Condition Room Temp. +20Ԩ +20 Ԩ Current(A) 1.25A 1 25A Time(min) 60min Test equipment NIC Components Corp. www.NICcomp.com | Page 25 Comparison: Surface Temperature Rise Company NIC Littelfuse Surface Surface Temperature of Fuse +43°C +83°C Fe (68.18%) Ni (34.82%) Ag(93.55%) Higher heating … Littelfuse element use Fe/Ni/Ag alloy element use Fe/Ni/Ag alloy material. It has higher internal resistance, so the temperature rise is higher than NIC NFVC FINDINGS: NIC NFVC has lower self‐heating than Littelfuse 451 NIC NFVC has lower self heating than Littelfuse 451 NIC Components Corp. www.NICcomp.com | Page 26 Comparison: Summary NIC NFVC Littelfuse 0451 i lf NFVC6125F1R00TRF 0451001.MRL DCR Excellent Good 2In Fusing Time Excellent Excellent I2 T Excellent Good Thermal Shock Excellent Good Surface Temp. Rise Excellent Good Performance SUMMARY: NFVC6125 series products have excellent performance, superior to Little fuse in above performance comparison, and are compatible as replacement with Littelfuse 451 type NIC Components Corp. www.NICcomp.com | Page 27 Technical & Sales Support NIC has broad offering in Performance Passives Additi lI f ti N d d? Additional Information Needed? Need Samples? Technical Support: tpmg@niccompcom Sales Support: [email protected] NIC Components Corp. European Engineering Support North America Engineering Support SE Asia Engineering Support www.NICcomp.com | Page 28