0451.062MRL.

Fuse **Datasheet** 

**451/453 Series** Very Fast-Acting Fuse 

## **RoHS PSE** [JHE -@u«cW@ ~~bC~~ iusECA 

## **Description** 

The Nano2® SMF Fuse is a very small, Wire-in-Air (WIA) square shape surface mount fuse that was designed for secondary side circuit over-current protection applications.  These fuses are designed for PCB using surface mount technology. 

## **Features & Benefits** 

## **Additional Information** 

- Very fast-acting 

   - UL Listed and Recognized to UL/CSA/NMX UL 248-1 and UL/CSA/NMX UL 248-14 (see Agency Approvals) 

- Small size 

- Wide range of current rating available (0.062A to 20A) 

   - Conforms to DENAN’s Appendix 3 

- Wide operating temperature ■ Conforms to IEC/EN 60127-1 

- range and IEC/EN 60127-7 

- RoHS compliant and Halogen Free 

## **Applications** 

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Resources Accessories Samples<br>451 Series 451 Series 451 Series<br>ey 6}<br>2S |<br>Resources Accessories Samples<br>453 Series 453 Series 453 Series<br>**----- End of picture text -----**<br>


## **Electrical Characteristics for Series** 

|**% of Ampere Rating**|**Ampere Rating**|**Opening Time**|
|---|---|---|
|100%|0.062 – 20|4 hours, Minimum|
|200%|0.062 – 10<br>12 – 20|5 sec., Maximum<br>20 sec., Maximum|



   - Storage system 

- Notebook PC 

- LCD/PDP TV 

   - Telecom system 

- LCD monitor 

   - Wireless basestation 

- LCD/PDP panel 

   - White goods 

   - Game console 

- LCD backlight inverter 

   - Office Automation equipment 

- Portable DVD player 

- Power supply 

   - Battery charging circuit protection 

- Networking 

   - Industrial equipment 

- PC server 

- Cooling fan system 

## **Agency Approvals** 

|**Agency**<br>cds|**Agency File Number**<br>E10480|**Ampere Range**<br>6.3A - 20A|
|---|---|---|
|@.|29862|0.062A - 15A|
|A|J50446731|1A, 1.25A, 2A, 2.5A,<br>3.15A, 4A, 5A, 7A,<br>8A, 10A, 12A, 20A|
|**PS**<br>**E**<br>Oo|NBK030205-E10480A<br>NBK030205-E10480B<br>NBK101105-E184655|1A-1.6A<br>2A-5A<br>6.3A - 10A|
||E10480|0.062A  - 5A|
|C~~c~~|NA|1A, 1.25A, 2A, 2.5A,<br>3.15A, 4A, 5A, 7A,<br>8A, 10A, 12A, 20A|



© 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 08/23/21 

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Fuse **Datasheet** 

**451/453 Series** Very Fast-Acting Fuse 

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## **Electrical Specifications by Item** 

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Ampere  Max Nominal Cold  Nominal  Agency Approvals<br>Rating Amp Code Voltage  Interrupting Resistance  Melting<br>(A) Rating  Rating (Ohms) I [2] t (A [2] sec) PSE<br>(V)<br>.062 .062 125 5.5000 0.00019 - x - x - -<br>.080 .080 125 4.0500 0.00033 - x - x - -<br>.100 .100 125 3.1000 0.00138 - x - x - -<br>.125 .125 125 1.7000 0.00286 - x - x - -<br>.160 .160 125 1.2157 0.0048 - x - x - -<br>.200 .200 125 0.8372 0.0089 - x - x - -<br>.250 .250 125 0.5765 0.0158 - x - x - -<br>.315 .315 125 50A @125VAC/VDC 0.3918 0.0311 - x - x - -<br>.375 .375 125 300A @32VDC 0.4541 0.0442 - x - x - -<br>.400 .400 125 PSE: 100A @100VAC 0.4233 0.0551 - x - x - -<br>.500 .500 125 0.3046 0.0824 - x - x - -<br>.630 .630 125 0.2022 0.1381 - x - x - -<br>.750 .750 125 0.1444 0.2143 - x - x - -<br>.800 .800 125 0.1355 0.2654 - x - x - -<br>1.00 001. 125 0.0780 0.6029 - x x x x x<br>1.25 1.25 125 0.0780 0.664 - x x x x x<br>1.50 01.5 125 0.0630 0.853 - x x x - -<br>1.60 01.6 125 0.0580 1.060 - x x x - -<br>2.00 002. 125 0.0367 0.530 - x x x x x<br>2.50 02.5 125 0.0286 1.029 - x x x x x<br>3.00 003. 125 50A @125VAC/VDC 0.0227 1.650 - x x x - -<br>3.15 3.15 125 10,000A @75VDC 0.0215 1.920 - x x x x x<br>300A @32VDC<br>3.50 03.5 125 PSE: 100A @100VAC 0.0200 2.469 - x x x - -<br>4.00 004. 125 0.0160 3.152 - x x x x x<br>5.00 005. 125 0.0125 5.566 - x x x x x<br>6.30 06.3 125 50A @125VAC/VDC  0.0096 9.170 x x x - - -<br>7.00 007. 125 400A @32VDC 0.0090 10.32 x x x - x x<br>8.00 008. 125 PSE: 100A @100VAC 0.0077 20.23 x x x - x x<br>35A @125 VAC/<br>10.0 010. 125 50A @125 VDC 0.0056 26.46 x x x - x x<br>400A @32 VDC<br>PSE: 100A @100VAC<br>12.0 012. 65 150A @65VDC 0.0049 47.97 x x - - x x<br>15.0 015. 65 100A @65VAC 0.0037 97.82 x x - - - -<br>20.0 020. 65 400A @32VDC 0.00244 154 x - - - x x<br>**----- End of picture text -----**<br>


**Notes:** 

- l[2] t calculated at 8ms. 

- Resistance is measured at 10% of rated current, 25ºC 

© 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 08/23/21 

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Fuse **Datasheet** 

**451/453 Series** Very Fast-Acting Fuse 

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## **Temperature Re-rating Curve** 

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## **Note:** 

**1.** Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation. 

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## **Average Time Current Curves** 

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100<br>10<br>1<br>0.1<br>0.01<br>0.001<br>0.01 0.1 1 10 100 1000 10000<br>CURRENT IN AMPS<br>62mA 80mA 100mA 125mA 160mA 200mA 250mA 315mA 375mA 400mA 500mA 630mA 750mA 800mA 1A 1.25A 1.5A 1.6A 2A 2.5A 3A 3.15A 3.5A 4A 5A 6.3A 7A 8A 10A 12A15A 20A<br>TIME IN SECONDS<br>**----- End of picture text -----**<br>


## **Soldering Parameters** 

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Reflow Condition Pb – Free assembly<br>- Temperature Min (Ts(min)) 150°C  t P<br>Pre Heat - Temperature Max (Ts(max)) 200°C T P Ramp-up Critical ZoneTL to TP<br>Average ramp up rate (Liquidus Temp (T- Time (Min to Max) (ts) L) to peak 60 – 180 secs5°C/second max. T S(max) T L t L<br>TS(max) to TL - Ramp-up Rate 5°C/second max.<br>Reflow - Temperature (TL) (Liquidus) 217°C  Preheat Ramp-down<br>- Temperature (tL) 60 – 150 seconds T S(min)<br>Peak Temperature (TP) 260 [+0/–5]  °C t S<br>Time within 5°C of actual peak Temperature (tp) 20 – 40 seconds 25<br>Ramp-down Rate 5°C/second max. time to peak temperature Time<br>(t 25ºC to peak)<br>Time 25°C to peak Temperature (TP) 8 minutes max.<br>Do not exceed 260°C<br>260°C Peak Temperature, 10 seconds<br>Wave Soldering Parameters<br>max.<br>Temperature<br>**----- End of picture text -----**<br>


© 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 08/23/21 

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Fuse **Datasheet** 

**451/453 Series** Very Fast-Acting Fuse 

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## **Product Characteristics** 

**Body:** Ceramic **Terminations** : **Materials** Gold-Plated Caps / Sn-dipped Silver Plated Caps (451 RoHS/HF series) Silver-plated Caps (451MR RoHS ratings below 375mA and 453 RoHS Series) **Product Marking** Brand, Ampere Rating **Operating Temperature** –55°C to 125°C **Moisture Sensitivity Level** Level 1, J-STD-020 **Solderability** MIL-STD-202, Method 208 **Insulation Resistance** MIL-STD-202, Method 302, Test **(after Opening)** Condition A (10,000 ohms minimum) 

|**acteristics**||
|---|---|
|**Thermal Shock**|MIL-STD-202, Method 107,  Test<br>Condition B, 5 cycles, -65°C /<br>+125°C, 15 minutes @ each extreme|
|**Mechanical Shock**|MIL-STD-202, Method 213, Test I:<br>Deenergized.  100G’s pk amplitude,<br>sawtooth wave 6ms duration, 3<br>cycles XYZ+xyz = 18 shocks|
|**Vibration**|MIL-STD-202, Method 201: 0.03”<br>amplitude, 10-55 Hz in 1 min.  2hrs<br>each XYZ=6hrs|
|**Moisture Resistance**|MIL-STD-202, Method 106, 10 cycles|
|**Salt Spray**|MIL-STD-202, Method 101, Test<br>Condition B (48hrs)|
|**Resistance to Soldering Heat**|MIL-STD-202, Method 210, Test<br>condition B (10 sec at 260°C)|



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Dimensions Part Numbering System<br>6.10 ± .20 2.69 ± .25 0451       001.   M     R    L<br>(.240") (.106")<br>Series<br>F 7 A 2.69 ± .25 451 = Gold / Sn-dipped Silver Plated Caps<br>(.106")<br>453 = Silver Plated Caps<br>1.45 Amp Code<br>(.057") Refer to Electrical<br>6.86 characteristics table<br>(.270")<br>Quantity code<br>3.15 M = 1000 pcs<br>(.124") N = 5000 pcs<br>2.95 Packaging code<br>1.96 (.116") R = Tape and Reel<br>(.077")<br>L-RoHS Compliant & Halogen Free<br>Recommended pad layout<br>(Gold Plated Caps)<br>SN-RoHS Compliant & Halogen Free<br>(Sn-dipped Caps)<br>**----- End of picture text -----**<br>


**Note:** “L” suffix applies to 451 series only - 453 series is available only as RoHS compliant version and does not require “L” suffix. Please do not include “L” suffix within 453 series ordering instructions. 

## **Packaging** 

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Quantity &<br>Packaging Option Packaging Specification Quantity<br> Packaging Code<br>12mm Tape and Reel EIA RS-481-2 (IEC 286, part 3) 5000 NR<br>12mm Tape and Reel EIA RS-481-2 (IEC 286, part 3) 1000 MR<br>**----- End of picture text -----**<br>


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© 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 08/23/21 

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