![0440004.WR — Fuse, Surface Mount, 4 A, Fast Acting, 32 V, 32 V, 1206 [3216 Metric], 440](/media/5/2/C/72C71C5CCFE50C25.webp)
0440004.WR
Fuse, Surface Mount, 4 A, Fast Acting, 32 V, 32 V, 1206 [3216 Metric], 440
- Manufacturer: LITTELFUSE
- Product type: SMD Fuses
- Fuse Current:4A; Product Range:440 Series; Voltage Rating VAC:32VAC; Voltage Rating V DC:32VDC; Blow Characteristic:Fast Acting; Fuse Case Style:1206; Breaking Capacity Current AC:50A; Brea
- SVHC: No SVHC (25-Jun-2020)
- Fuse Current: 4A
- Product Range: 440
- Fuse Case Style: 1206 [3216 Metric]
- Voltage Rating VAC: 32V
- Voltage Rating VDC: 32V
- Blow Characteristic: Fast Acting
- Breaking Capacity Current AC: 50A
- Breaking Capacity Current DC: 50A
| Delivery and price | |
|---|---|
| Units per pack | 1500 |
| Price | 0.571 € |
| Current stock | 50+ |
| Lead time | 30 days |
**Surface Mount Fuses** Ceramic Fuse > 440 Series ## **440 Series, 1206 High I[2] t Fuse** ## ~~**Description**~~ 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. ## ~~**Agency Approvals**~~ ## ~~**Features**~~ |AGENCY|AGENCY FILE NUMBER|AMPERE RANGE| |---|---|---| |AW<br>G.|E10480|1.75A - 8A| |G.|Pending|1.75A - 8A| and lead-free reflow / wave soldering from -55ºC to +150ºC compliant and Halogen| 2t values free e Ultra high | ## ~~**Applications**~~ ## ~~**Electrical Characteristics for Series** CT~~ |% of Ampere<br>Rating|Ampere Rating|Opening Time at 25ºC| |---|---|---| |100%|1.75A - 8A|4 hours, Minimum| |350%|1.75A - 8A|5 secs., Maximum| ## ~~**Electrical Specifcations by Item**~~ |Ampere<br>Rating<br>(A)<br>||Amp<br>Code<br>|~~||~~|Max.<br>Voltage<br>Rating (V)<br>~~||~~|Interrupting Rating<br>(AC/DC)1|Nominal<br>Resistance<br>(Ohms)2<br>~~a~~|Nominal<br>Melting I2t<br>(A2Sec.)3<br>~~ee~~|Nominal Voltage<br>Drop At Rated<br>Current (V)4<br>~~ee~~|Nominal Voltage<br>Nominal Power<br>Dissipation At<br>Rated Current (W)<br>~~|~~<br>~~ee~~|AgencyApprovals<br>~~|~~sd|AgencyApprovals<br>~~|~~sd| |---|---|---|---|---|---|---|---|---|---| |||||||||~~|~~<br>~~ee~~|| |1.75<br>|<br>||1.75<br>|~~||~~<br>|~~|~~|32<br>~~||~~<br>~~|~~|50 A @ 32 V AC/DC|0.04121<br>~~a~~<br>~~es~~|0.3312<br>~~ee~~<br>~~ee~~|0.07769<br>~~ee~~|0.136<br>~~ee~~|x<br>~~ee~~|x| |2<br>|<br>|<br>||002.<br>| ~~||~~<br>|~~|~~<br>|~~||~~|32<br>~~||~~<br>~~|~~<br>~~||~~||0.03582<br>~~a~~<br>~~es~~<br>~~es~~|0.4326<br>~~ee~~<br>~~ee~~<br>~~ee~~|0.07921<br>~~ee~~|0.158<br>~~ee~~|x<br>~~ee~~|x| |2.5<br>|<br>|<br>||02.5<br>| ~~|~~<br>|~~||~~<br>|<br>||32<br>~~|~~<br>~~||~~||0.026706<br>~~es~~<br>~~es~~<br>~~es~~|0.8191<br>~~ee~~<br>~~ee~~<br>~~ee ee~~|0.0747<br>~~ee~~|0.187|x|x| |3<br>|<br>||003.<br>| ~~||~~<br>|<br>|<br>~~[|~~|32<br>~~||~~<br>~~[|~~||0.022<br>~~es~~<br>~~es~~<br>~~ee~~|1.232<br>~~ee~~<br>~~ee ee~~<br>~~ee~~|0.07418<br>~~ee~~|0.223|x|x| |3.5<br>|<br>||03.5<br>|<br>|<br>~~[|~~<br>|<br>||32<br>~~[|~~||0.01877<br>~~es ~~<br>~~ee~~<br>~~es~~|1.789<br> ~~ee ee~~<br>~~ee~~<br>~~es~~|0.07566<br>~~ee~~|0.265|x|x| |4<br>||004.<br>~~[|~~<br>|<br>|<br>[~~||~~|32<br>~~[|~~<br>~~||~~||0.01515<br>~~ee~~<br>~~es~~<br>~~es~~|2.601<br>~~ee~~<br>~~es~~<br>~~ee~~|0.07088|0.284|x|x| |5<br>|<br>||005.<br>|<br>|<br>[~~||~~<br>|~~|~~|32<br>~~||~~<br>~~|~~||0.01119<br>~~es~~<br>~~es~~<br>~~ee~~|4.761<br>~~es~~<br>~~ee~~<br>~~ee~~|0.06544|0.327|x|x| |7<br>|<br>||007.<br>[~~||~~<br>|~~|~~<br>|~~|~~|32<br>~~||~~<br>~~|~~<br>~~|~~||0.00794<br>~~es~~<br>~~ee~~<br>~~es~~|8.464<br>~~ee~~<br>~~ee~~<br>~~es~~|0.06963|0.487|x|x| |8<br>|<br>||008.<br>| ~~|~~<br>|~~|~~|32<br>~~|~~<br>~~|~~||0.00646<br>~~ee~~<br>~~es~~|12.95<br>~~ee~~<br>~~es~~|0.065526|0.524|x|x| 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. Nominal Melting I²t 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 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. © 2009 Littelfuse, Inc. **440 Series** **1** Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/440.html for current information. Revised: December 18, 2009 **Introduction to Circuit ProtectionSurface Mount Fuses** Ceramic Fuse > 440 SeriesTransientology ## ~~**Temperature Derating Curve**~~ ## ~~**Average Time Current Curves**~~ **==> picture [505 x 631] intentionally omitted <==** **----- Start of picture text -----**<br> 140<br>120<br>100 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>Note:<br>1. Derating depicted in this curve is in addition to the standard derating of 20% for<br>continuous operation.<br>���������<br>For continuous operation at 75 degrees celsius, the fuse should be derated as follows: 0.01<br>I = (0.80)(0.85)IRAT = (0.68)IRAT<br>0.001<br>1 10 100 1000<br>CURRENT IN AMPERES<br>Soldering Parameters<br>Reflow Condition ���������������� 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>1.75A 2A 2.5A 3A 3.5A 4A 5A 7A 8A<br>PERCENT OF RATING<br>TIME IN SECONDS<br>Temperature<br>**----- End of picture text -----**<br> © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/440.html for current information. **440 Series** **2** **Surface Mount Fuses** Ceramic Fuse > 440 Series ## ~~**Product Characteristics**~~ **Body:** Advanced Ceramic **Moisture Resistance** MIL-STD-202, Method 106G **Materials Terminations:** Ag / Ni / Sn (100% Lead-free) MIL-STD-202, Method 107G, **Thermal Shock Element Cover Coating:** Lead-free Glass ~~ss a~~ **Moisture Mechanical Shock** MIL-STD-202, Method 213B, Condition A **Sensitivity Level Vibration** MIL-STD-202, Method 201A **Solderability Vibration,** MIL-STD-202, Method 204D, **Humidity Test High Frequency** Condition D **Dissolution of ESD Immunity Metallization** Condition D Ln IEC 61000-4-2, 8KV Direct ee IPC/ECA/JEDEC J-STD-002C, **Resistance to** | **Solder Heat** MILSTD-202, Method 210E Condition B EC **Terminal Strength** 0127-4 ## ~~**Dimensions**~~ **==> picture [198 x 332] intentionally omitted <==** **----- Start of picture text -----**<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>Tf an 2<br>TERMINATION<br>0.520 ± .200<br>[.020 ± .008]<br>1.000 1.500<br>[.039] [.059]<br>1.800<br>[.071]<br>3.500<br>[.138]<br>**----- End of picture text -----**<br> |Amp Code|Marking Code| |---|---| |1.75|**L**| |002.|**N**| |02.5|**O**| |003.|**P**| |03.5|**R**| |004.|**S**| |005.|**T**| |007.|**W**| |008.|**X**| **==> picture [104 x 9] intentionally omitted <==** **----- Start of picture text -----**<br> Part Numbering System<br>**----- End of picture text -----**<br> **0440 008. W R SERIES AMP CODE QUANTITY CODE** W = 3000 pcs ## **PACKING CODE** ## ~~**Packaging**~~ |~~**Packaging**~~|||| |---|---|---|---| |Packaging Option|Packaging Specification|Quantity|Quantity &<br>Packaging Code| |8mm Tape and Reel||3000|WR| © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/440.html for current information. **440 Series** **3** **Introduction to Circuit Protection** Transientology © 2009 Littelfuse, Inc. Specifications are subject to change without notice. **4**
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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