0407003.WR

**Surface Mount Fuses** Ceramic Fuse > 407 Series 

~~**RoH**~~ **S Pb** 

## 407 Series – 1206 Time-Lag Fuse 

## ~~**Description**~~ 

Littelfuse 407 Series is a 100% lead-free, RoHS compliant and halogen-free fuse designed specifically to provide overcurrent protection to circuits that operate under high working ambient temperatures up to 150º C and high in-rush currents. The general design ensures excellent temperature stability and performance reliability. This high I[2] t time lag fuse is designed to have ultra-high in-rush current withstand capability to avoid nuisance fuse open. 

## ~~**Features**~~ 

## ~~**Agency Approvals**~~ 

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AGENCY AGENCY FILE NUMBER AMPERE RANGE<br>E10480 1A – 8A<br>**----- End of picture text -----**<br>


- Operating Temperature compliant and from -55º C to +150º C Halogen-free 

- UL Recognized to •  Suitable for both leaded UL/CSA/NMX 248-1 and and lead-free reflow/wave UL/CSA/NMX 248-14 soldering 

- 100% Lead-free, RoHS •  Ultra high I[2] t values 

## ~~**Electrical Characteristics**~~ 

|% of Ampere<br>Rating<br>100%|Ampere<br>Rating<br>1A – 8A|Opening Time at 25ºC<br>4 hours Minimum|
|---|---|---|
|200%|1A – 8A|1 sec Min; 120 secs Max|
|300%|1A – 8A|0.1 sec Min; 3 secs Max|
|800%|1A – 8A|0.002 sec Min; 0.05 secs Max|



## ~~**Benefts**~~ 

- Avoids nuisance opening •  High current ratings in due to high inrush and small size surge current inherent in the system 

## ~~**Applications**~~ 

## **Additional Information** 

- Displays 

- Servers 

- Computers 

   - Scanners 

   - Data Modems 

   - Gaming Consoles 

- Printers 

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Datasheet Samples<br>**----- End of picture text -----**<br>


© 2020 Littelfuse, Inc. 

Specifications are subject to change without notice.  Application testing is strongly recommendedSpecifications are subject to change without notice **.** Revised: 09/14/20 

**Surface Mount Fuses** Ceramic Fuse > 407 Series 

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## ~~**Electrical Specifcations by Item**~~ 

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Max.  Nominal  Nominal Power Agency<br>Ampere Rating Amp Voltage  Interrupting Rating Resistance Nominal   Melting INominal  [2] t  Voltage Dissipation At Approval<br>Code Rating Drop At Rated Rated Current<br>(A) (AC/DC) [1] (Ohms) [2] (A [2] Sec.) [3]<br>(V) Current (V) [4] (W)<br>1.00 001. 63 0.360 0.142 0.456 0.456 x<br>1.25 1.25 63 0.200 0.329 0.404 0.500 x<br>50A@63VDC<br>1.50 01.5 63 0.180 0.567 0.347 0.525 x<br>2.00 002. 63 0.100 0.870 0.323 0.640 x<br>2.50 02.5 32 0.055 1.000 0.252 0.625 x<br>3.00 003. 32 0.040 1.300 0.187 0.570 x<br>3.50 03.5 32 0.030 2.260 0.153 0.525 x<br>50A@32VDC<br>4.00 004. 32 0.025 4.180 0.142 0.560 x<br>4.50 04.5 32 0.020 5.200 0.134 0.585 x<br>5.00 005. 32 0.016 7.800 0.133 0.650 x<br>5.50 05.5 24 50A@24VDC 0.014 8.550 0.130 0.715 x<br>6.00 006. 24 0.012 15.560 0.128 0.780 x<br>7.00 007. 24 60A@24VDC 0.010 16.230 0.110 0.770 x<br>8.00 008. 24 0.009 24.120 0.097 0.800 x<br>**----- End of picture text -----**<br>


## **Note:** 

1.  AC Interrupting Rating tested at rated voltage with unity power factor. DC Interrupting Rating tested at rated voltage with time constant < 0.8 msec. 

2. Nominal Resistance measured with < 10% rated current. 

3. Nominal Melting I[2] t measured at 1 msec opening time. 

   - Devices designed to carry rated current for 4 hours minimum. It is recommended that devices be operated continuously at no more than 80% rated current. See _Temperature Re-rating Curve_ for additional derating information. 

   - Devices designed to be mounted with marking code facing up. 

4. Nominal Voltage Drop measured at rated current after temperature has stabilized. 

## ~~**Temperature Re-rating Curve**~~ 

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140<br>120<br>100<br>80<br>60<br>40<br>-65     -45      -25 -5        15       35       55       75       95      115     135    155<br>TEMPERATURE (°C)<br>PERCENT OF RATING<br>**----- End of picture text -----**<br>


Note: 

- Re-rating depicted in this curve is in addition to the standard re-rating of 20% for continuous operation. 

Example: 

- For continuous operation at 75º C, the fuse should be rerated as follows: 

- I = (0.80)(0.85)IRAT = (0.68)IRAT 

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Average Time Current Curves<br>100.000<br>10.000<br>1.000<br>0.100<br>0.010<br>0.001<br>1 10 100 1000<br>CURRENT (AMPERE)<br>1A 1.25A 1.5A 2A 2.5A 3A 3.5A 4A 4.5A 5A 5.5A 6A 7A 8A<br>TIME IN SECONDS<br>**----- End of picture text -----**<br>


© 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/20 

**Surface Mount Fuses** Ceramic Fuse > 407 Series 

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## ~~**Soldering Parameters**~~ 

||Refow Condition<br>Pre Heat<br>- Temperature Min (Ts(min))<br>- Temperature Max (Ts(max))<br>- Time (Min to Max) (ts)<br>Average Ramp-up Rate (Liquidus Temp<br>(TL) to peak)|Pb – free assembly<br>150°C<br>200°C<br>60 – 180 seconds<br>3° C/second max.||
|---|---|---|---|
||TS(max)to TL- Ramp-up Rate|5° C/second max.||
||Refow<br>- Temperature (TL) (Liquidus)<br>- Temperature (tL)|217° C<br>60 – 150 seconds||
||Peak Temperature (TP)|260+0/-5° C||
||Time within 5°C of actual peak<br>Temperature (tp)|10 – 30 seconds||
||Ramp-down Rate|6° C/second max.||
||Time 25°C to peak Temperature (TP)|8 minutes max.||
||Do not exceed|260°C||
|||||
||Wave soldering<br>260°C, 10 seconds max.|||
||~~**Product Characteristics**~~|||
||**Body:**Advanced Ceramic|||
||**Materials**<br>**Terminations:**Ag / Ni / Sn (100% Lead-<br>free)|||
||**Element Cover Coating:**Lead-free Glass|||
||**Moisture Sensitivity**<br>**Level**<br>IPC/JEDEC J-STD-020, Level 1|||
||**Solderability**<br>IPC/ECA/JEDEC J-STD-002, Condition C|||
||**Humidity Test**<br>MIL-STD-202, Method 103, Conditions D|||
||**Resistance to Solder**<br>**Heat**<br>MIL-STD-202, Method 210, Condition B|||
||**Moisture Resistance**<br>MIL-STD-202, Method 106|||
||**Thermal Shock**<br>MIL-STD-202, Method 107, Condition B|||
||**Mechanical Shock**<br>MIL-STD-202, Method 213, Condition A|||
||**Vibration**<br>MIL-STD-202, Method 201|||
||**Vibration,**<br>**High Frequency**<br>MIL-STD-202, Method 204, Condition D|||
||**Dissolution of**<br>**Metallization**<br>IPC/ECA/JEDEC J-STD-002, Condition D|||
||**Terminal Strength**<br>IEC 60127-4|||



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t P<br>T P<br>Critical Zone<br>Ramp-up TL to TP<br>T S(max) T L t L<br>Ramp-down<br>Preheat<br>T S(min)<br>t S<br>25<br>time to peak temperature Time<br>(t 25ºC to peak)<br>Temperature<br>**----- End of picture text -----**<br>


© 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/20 

**Surface Mount Fuses** Ceramic Fuse > 407 Series 

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SS Dimensions Part Marking System<br>All dimentions in mm (in) Amp Code Marking Code Amp Code Marking Code<br>3.200 ± .1778<br>[.126 ± .007] 001. H 004. S<br>1.25 J 04.5 S.<br>01.5 K 005. T<br>—_ a - -<br>1.63 + .10/ -.20 002. N 05.5 U<br>[.064 + .004/ -.008]<br>02.5 O 006. V<br>003. P 007. W<br>03.5 R 008. X<br>Lis<br>0.835 ± 0.15<br>[0.033 ± 0.006] Part Numbering System<br>0407 008. W  R<br>0.520 ± .200<br>a_i. [.020 ± .008] a<br>SERIES<br>PACKING ODE<br>1.000 1.500<br>[.039] [.059] R = Reel pack<br>AMP CODE QUANTITY CODE<br>+ Refer to Electrical ac W = 3000 pieces<br>1.800 Characteristics Table<br>[.071]<br>3.500<br>Ju [.138]<br>Packaging<br>Quantity &<br>Packaging Option Form Factor Packaging Specification Quantity<br> Packaging Code<br>EIA-481, IEC 60286,<br>8mm Tape and Reel Surface Mount 3000 WR<br>Part 3<br>**----- End of picture text -----**<br>


Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at https://www.littelfuse.com/legal/disclaimers/product-disclaimer.aspx. 

© 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/20