0440001.WR.
FUSE, SMD, 1A, 1206, FAST ACTING
- Manufacturer: LITTELFUSE
- Product type: SMD Fuses
- Fuse Current:1A; Blow Characteristic:Fast Acting; Voltage Rating VAC:50VAC; Voltage Rating VDC:50VDC; Fuse Case Style:1206 ^3216 Metric]; Product Range:440 Series; Br 64R8009
- Voltage Rating VAC: 50VAC
- Voltage Rating VDC: 50VDC
| Delivery and price | |
|---|---|
| Units per pack | 500 |
| Price | 0.612 € |
| Current stock | 200+ |
| Lead time | 30 days |
**Surface Mount Fuses** Ceramic Fuse > 440 Series **RoHS** ~~**Pb** [_I@QHFAL@,~~ ## 440 Series, 1206 High I2t Fuse ## ~~**Description** Lo~~ The 440 Series is a 100% Lead-free, RoHS compliant and Halogen-free fuse series designed specifically to provide over-current protection to circuits that operate under high working ambient temperatures up to 150ºC and high inrush currents. The general design ensures excellent temperature stability and performance reliability. This high I[2] t fuse series is designed to have ultra high inrush current withstand capability to avoid nuisance fuse open. ## ~~**Features**~~ - Operating Temperature • Suitable for both leaded from -55ºC to +150ºC and lead-free reflow / wave soldering - • 100% Lead-free, RoHS compliant and Halogen-free • Ultra high I[[2]] t values > compliant and Halogen-free • Ultra high I[[2]] t values ~~**Agency Approvals Applications** Lo~~ AGENCY AGENCY FILE NUMBER AMPERE RANGE ~~Lo~~ • LCD Displays • Scanners W E10480 .25A - 8A • Servers • Data Modems 29862 .25A - 8A - LCD Displays • Scanners • Servers • Data Modems • Notebook Computers • Hard Disk Drives 29862 .25A - 8A @, ~~**Electrical Characteristics for Series** ee~~ - Printers **==> picture [504 x 316] intentionally omitted <==** **----- Start of picture text -----**<br> |||||||||||||| |---|---|---|---|---|---|---|---|---|---|---|---|---| |Electrical Characteristics for Series|Additional Information| |% of Ampere| |Ampere Rating|Opening Time at 25ºC| |Rating| |100%|0.25A - 8A|4 hours, Minimum| |—|350%|0.25A - 8A|5 secs., Maximum|Datasheet|Resources|Samples| |Electrical Specifcations by Item| ||| |Ampere|Max.|Nominal|Nominal|Nominal Voltage|Nominal Power|sd|Agency Approvals| |Rating|Amp|Voltage|Interrupting Rating|Resistance|Melting I|[2]|t|Drop At Rated|Dissipation At| |Code|(AC/DC)|[1]| |(A)|Rating (V)|(Ohms)|[2]|(A|[2]|Sec.)|[3]|Current (V)|[4]|Rated Current (W)| |Wi ||G.| |0.25|.250|125|2.140|0.00649|0.5260|0.132|x|X| |50 A @ 125 V AC/DC| |0.375|.375|125|1.216|0.01455|0.4993|0.187|x|X| ||Se|S|es————EE————————es| |0.5|a|.500|a|63|50 A @ 63 V AC/DC|0.8140|0.02642|0.4831|0.242|x|X| |0.75|a|.750|GQ|63|50 A @ 63 V AC/DC|0.4624|0.09312|0.3983|0.299|x|X| |1|001.|50|0.3096|0.21054|0.3457|0.346|x|X| |50 A @ 50 V DC| |1.25|1.25|50|0.2265|0.379|0.3240|0.405|x|X| ||||S|50 A @ 50 V AC|es|es| |1.5||A|01.5|||50|es|0.1759|0.50652|es|0.3215|0.482|x|X| |1.75|1.75|32|0.0450|0.3312|0.0777|0.136|x|X| |||||ee| |2|002.|32|0.0385|0.4326|0.0792|0.158|x|X| |a|ee|a|es| |2.5|02.5|32|0.02850|0.8191|0.0747|0.187|x|X| |||||a|es| |3|003.|32|0.02252|1.232|0.0742|0.223|x|X| |||||es|es| |3.5|03.5|32|50 A @ 32 V AC/DC|0.01845|1.789|0.0757|0.265|x|X| |||||ee| |4|004.|32|0.01553|2.601|0.0709|0.284|x|X| |a|Re|eG| |5|005.|32|0.0120|4.761|0.0654|0.327|x|X| |||||a|es| |7|007.|32|0.00753|8.464|0.0696|0.487|x|X| |||||es|es| |8|008.|32|0.00634|12.95|0.0655|0.524|x|X| |a|ee|Re| **----- End of picture text -----**<br> Notes: 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. Contact Littelfuse if application transient surges are less than 1 ms. 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 Derating 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. © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Application testing is strongly recommended. Revised: 05/15/15 **Surface Mount Fuses** Ceramic Fuse > 440 Series **==> picture [94 x 32] intentionally omitted <==** **==> picture [522 x 224] intentionally omitted <==** **----- Start of picture text -----**<br> Temperature Rerating Curve Average Time Current Curves<br>140 100<br>120<br>100<br>10<br>80<br>60<br>1<br>40<br>-65 -45 -25 -5 15 35 55 75 95 115 135 155<br>TEMPERATURE (°C)<br>0.1<br>PERCENT OF RATING<br>TIME IN SECONDS<br>**----- End of picture text -----**<br> **==> picture [228 x 275] intentionally omitted <==** **----- Start of picture text -----**<br> 100<br>10<br>1<br>0.1<br>0.01<br>0.001<br>0.1 1.0 10.0 100.0 1000.<br>CURRENT IN AMPERES<br>TIME IN SECONDS<br>**----- End of picture text -----**<br> Note: 1. Rerating depicted in this curve is in addition to the standard derating of 20% for continuous operation. Example: For continuous operation at 75 degrees celsius, the fuse should be derated as follows: - I = (0.80)(0.85)IRAT = (0.68)IRAT **==> picture [522 x 286] intentionally omitted <==** **----- Start of picture text -----**<br> Soldering Parameters<br>Reflow Condition Pb-free assembly t P<br>T P<br>Critical Zone<br>- Temperature Min (Ts(min)) 150°C Ramp-up TL to TP<br>Pre Heat - Temperature Max (Ts(max)) 200°C T S(max) T L t L<br>- Time (Min to Max) (ts) 60 – 180 seconds<br>Average Ramp-Up Rate (Liquidus Temp 3°C/second max. Preheat Ramp-down<br>(TL) to peak) T S(min)<br>TS(max) to TL - Ramp-up Rate 5°C/second max. t S<br>Reflow - Temperature (TL) (Liquidus) 217°C 25<br>- Temperature (tL) 60 – 150 seconds time to peak temperature(t 25ºC to peak) Time<br>Peak Temperature (TP) 260 [+0/-5] °C<br>Time within 5°C of actual peak<br>10 – 30 seconds<br>Temperature (tp)<br>Ramp-down Rate 6°C/second max.<br>Time 25°C to peak Temperature (TP) 8 minutes max.<br>Do not exceed 260°C<br>Wave Soldering 260°C, 10 seconds max.<br>Temperature<br>**----- End of picture text -----**<br> © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 05/15/15 **Surface Mount Fuses** Ceramic Fuse > 440 Series **==> picture [93 x 32] intentionally omitted <==** ||~~**Product Characteristics**~~|~~**Product Characteristics**~~||||| |---|---|---|---|---|---|---| |||||||| |||**Body:**Advanced Ceramic||**Moisture Resistance**|MIL-STD-202, Method 106|| ||**Materials**|**Terminations:**Ag / Ni / Sn (100% Lead-free)<br>**Element Cover Coating:**Lead-free Glass||**Thermal Shock**|MIL-STD-202, Method 107,<br>Condition B|| ||**Moisture**<br>**Sensitivity Level**|IPC/JEDEC J-STD-020, Level 1||**Mechanical Shock**<br>**Vibration**|MIL-STD-202, Method 213,<br>Condition A<br>MIL-STD-202, Method 201|| ||**Solderability**<br>**Humidity Test**|IPC/ECA/JEDEC J-STD-002, Condition C<br>MIL-STD-202, Method 103, Conditions D||**Vibration,**<br>**High Frequency**<br>**Dissolution of**|MIL-STD-202, Method 204,<br>Condition D<br>IPC/ECA/JEDEC J-STD-002,|| ||**Resistance to**<br>**Solder Heat**|MIL-STD-202, Method 210, Condition B||**Metallization**<br>**Terminal Strength**|Condition D<br>IEC 60127-4|| **==> picture [261 x 271] intentionally omitted <==** **----- Start of picture text -----**<br> Dimensions<br>3.200 ± .1778<br>[.126 ± .007]<br>1.000 1.63 + .10/ -.20<br>[.039] [.064 + .004/ -.008]<br>X<br>.8179 +.046/ -.076<br>[.0322 +.0018/ -.003]<br>TERMINATION<br>0.520 ± .200<br>[.020 ± .008]<br>**----- End of picture text -----**<br> **==> picture [261 x 247] intentionally omitted <==** **----- Start of picture text -----**<br> Part Marking System<br>Amp Code Marking Code<br>.250 D<br>.375 E<br>.500 F<br>.750 G<br>001. H<br>1.25 J<br>01.5 K<br>1.75 L<br>002. N<br>02.5 O<br>003. P<br>03.5 R<br>004. S<br>005. T<br>007. W<br>008. X<br>Part Numbering System<br>**----- End of picture text -----**<br> **==> picture [522 x 208] intentionally omitted <==** **----- Start of picture text -----**<br> 0.520 ± .200 0440 008. W R<br>[.020 ± .008]<br>SERIES<br>1.000 1.500<br>[.039] [.059]<br>AMP CODE<br>[.071]1.800 QUANTITY CODE<br>W = 3000 pcs<br>3.500<br>[.138] PACKING CODE<br>R = Reel Pack<br>Packaging<br>Quantity &<br>Packaging Option Packaging Specification Quantity<br> Packaging Code<br>8mm Tape and Reel EIA-481, IEC 60286, Part 3 3000 WR<br>**----- End of picture text -----**<br> © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 05/15/15
Updated at June 9, 2026
Founded in 1927 and headquartered in Chicago, Illinois, Littelfuse is a premier global manufacturer of circuit protection, power control, and sensing technologies. Widely recognized for pioneering the first small, fast-acting protective fuse, the company has grown into an industry leader whose highly reliable components are essential to modern industrial, transportation, and consumer electronics applications worldwide. At the core of the Littelfuse portfolio is an expansive and industry-leading range of circuit protection solutions. This encompasses a massive selection of traditional fuses, fuse holders, and resettable PTC thermistor fuses designed to safely interrupt overcurrent conditions. To defend against electrical overstress, Littelfuse also provides advanced transient voltage suppression (TVS) technologies, including thousands of specialized TVS diodes, TVS varistors, and gas discharge tubes (GDTs) that ensure robust defense against voltage spikes and environmental hazards. Beyond its foundational protection components, Littelfuse manufactures a diverse array of discrete semiconductors, sensors, and switching devices. Engineers rely on their high-performance thyristors, including TRIACs and SCRs, alongside power-efficient Schottky diodes and MOSFETs for demanding power control applications. Complemented by precision proximity sensors and highly reliable reed and solid-state relays, Littelfuse delivers the critical building blocks required for secure, efficient, and complete system design.
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