Image not available
Illustrative purposes only
043803.5WRA
FUSE, AEC-Q200, FAST ACTING, 3.5A, 0603
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: LITTELFUSE
- Product type: SMD Fuses
- Fuse Current:3.5A; Blow Characteristic:Fast Acting; Voltage Rating VAC:32VAC; Voltage Rating VDC:32VDC; Fuse Case Style:0603 ^1608 Metric]; Product Range:438A 46AC4660
- Fuse Current: 3.5A
- Product Range: 438A Series
- Fuse Case Style: 0603 [1608 Metric]
- Voltage Rating VAC: 32
- Voltage Rating VDC: 32VDC
- Blow Characteristic: Fast Acting
- Breaking Capacity Current AC: 50A
- Breaking Capacity Current DC: 50A
| Delivery and price | |
|---|---|
| Units per pack | 50 |
| Price | 1.07 € |
| Current stock | 500+ |
| Lead time | 30 days |
Datasheet
**Surface Mount Fuses** Ceramic Fuse > 438A Series ## 438A Series – 0603 Fast-Acting Fus ~~e~~ ## **R** ~~**oHS**~~ **Pb** ~~[_JQHF chu @.~~ ## ~~**Description** Po~~ The 438A series AECQ-compliant fuses are specifically tested to cater secondary circuit protection needs of compact auto electronics application. The general design ensures excellent temperature stability and performance reliability. The high I²t values which is typical in the Littelfuse ceramic fuse family ensure high inrush current withstand capability. ## ~~**Features** [Po~~ - Operating Temperature • Meets Littelfuse's from -55ºC to +150ºC Automotive qualifications* ## ~~**Agency Approvals**~~ **==> picture [223 x 138] intentionally omitted <==** **----- Start of picture text -----**<br> Agency Agency File Number Ampere Range<br>E10480 0.25A – 6A<br>Wks<br>29862 0.25A – 6A<br>@.<br>Electrical Characteristics for Series<br>% of Ampere<br>Ampere Rating Opening Time at 25ºC<br>Rating<br>100% 0.250A – 6A 4 Hours, Minimum<br>250% 0.250A – 6A | 5 Seconds, Maximum<br>**----- End of picture text -----**<br> ## ~~**Electrical Characteristics for Series**~~ - 100% Lead-free, RoHS • Recognized to UL/CSA/ compliant and HalogenNMX 248-1 and UL/CSA/ free NMX 248-14 - Suitable for both leaded and lead-free reflow/wave - soldering * Largely based on Littelfuse internal AECQ-200 test plan. ~~**Applications** Lo~~ - Li-ion Battery • TFT Display • LED Head-Lights • Battery Management System (BMS) - • Automotive Navigation System • Clusters ## **Additional Information** **==> picture [199 x 9] intentionally omitted <==** **----- Start of picture text -----**<br> Datasheet Resources Samples<br>**----- End of picture text -----**<br> ## ~~**Electrical Specifcations by Item** LT~~ |**Ampere**<br>**Rating**<br>**(A)**<br>**Amp**<br>**Code**<br>**Max.**<br>**Voltage**<br>**Rating (V)**<br>**Interrupting Rating**<br>**(AC/DC)1**<br>**Nominal**<br>**Resistance**<br>**(Ohms)2**<br>**Nominal**<br>**Melting I2t **<br>**(A2Sec.)3**<br>**Nominal Voltage**<br>**Drop At Rated**<br>**Current (V)4**<br>**Nominal Power**<br>**Dissipation At Rated**<br>**Current (W)**<br>||**Ampere**<br>**Rating**<br>**(A)**<br>**Amp**<br>**Code**<br>**Max.**<br>**Voltage**<br>**Rating (V)**<br>**Interrupting Rating**<br>**(AC/DC)1**<br>**Nominal**<br>**Resistance**<br>**(Ohms)2**<br>**Nominal**<br>**Melting I2t **<br>**(A2Sec.)3**<br>**Nominal Voltage**<br>**Drop At Rated**<br>**Current (V)4**<br>**Nominal Power**<br>**Dissipation At Rated**<br>**Current (W)**<br>||**Agency Approvals**<br>~~pe~~<br>cs @.| |---|---|---| |0.25<br>.250<br>63VDC<br>2.218<br>0.0017<br>0.550|0.138|x<br>x| |0.375<br>.375<br>63VDC<br>1.247<br>0.0041<br>0.488<br>|<br>||0.183|x<br>x| |50A @ 63VDC<br>50A @ 32VAC<br>0.5<br>.500<br>63VDC<br>0.829<br>0.0100<br>0.486<br>0.243<br>0.75<br>.750<br>63VDC<br>0.466<br>0.0281<br>0.378<br>0.284<br>1<br>001.<br>63VDC<br>0.310<br>0.0593<br>0.351<br>0.351<br>1.25<br>1.25<br>63VDC<br>0.200<br>0.0510<br>0.365<br>0.456<br>1.75<br>1.75<br>32VDC<br>50A@32VAC/32VDC<br>0.1405<br>0.1440<br>0.360<br>0.540<br>2<br>002.<br>32<br>50A @ 32VDC/12VAC<br>0.0490<br>0.181<br>0.107<br>0.214<br>2.5<br>02.5<br>32<br>0.0364<br>0.240<br>0.095<br>0.238<br>3<br>003.<br>32<br>0.0264<br>0.439<br>0.093<br>0.279<br>3.5<br>03.5<br>32<br>0.0210<br>0.647<br>0.082<br>0.287<br>4<br>004.<br>32<br>0.0177<br>0.730<br>0.079<br>0.316<br>~~-—~~<br>~~a~~<br>~~—~~<br>~~—~~<br>~~——=~~<br>~~=~~<br>~~_~~<br>~~|~~<br>~~|~~<br>~~—~~||x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x| |5<br>005.<br>32<br>0.0127<br>0.747<br>0.074<br>6<br>006.<br>24<br>50A @ 24VDC/12VAC<br>0.0086<br>1.444<br>0.072<br>~~|~~<br>|<br>||0.370<br>0.432|x<br>x<br>x<br>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. **4.** Nominal Voltage Drop measured at rated current after temperature has stabilized. 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 re-rating information. - Devices designed to be mounted with marking code facing up. © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 10/11/19 **Surface Mount Fuses** Ceramic Fuse > 438A Series **==> picture [94 x 32] intentionally omitted <==** ## ~~**Temperature Re-rating Curve**~~ **==> picture [243 x 176] intentionally omitted <==** **----- Start of picture text -----**<br> 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:** **1.** Re-rating depicted in this curve is in addition to the standard re-rating of 20% for continuous operation. **Example:** For continuous operation at 75 degrees celsius, the fuse should be rerated as follows: I = (0.80)(0.85)IRAT = (0.68)IRAT ## ~~**Average Time Current Curves**~~ **==> picture [243 x 311] 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 10 100<br>CURRENT IN AMPERES<br>.250A .375A .500A .750A 1A 1.25A 1.75A 2A 2.5A 3A 3.5A 4A 5A 6A<br>TIME IN SECONDS<br>**----- End of picture text -----**<br> ||~~**Soldering Parameters**~~||||||||||||||||||| |---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---| ||**Refow Condition**|Pb – free assembly|||||||||||||||||| ||**Pre Heat**<br>**- Temperature Min (Ts(min))**<br>**- Temperature Max (Ts(max))**|150°C<br>200°C|||**T**P|||||**Ramp-up**|||**t**P||**Critical Zone**<br>**TL to TP**||||| ||**- Time (Min to Max) (ts)**<br>**Average Ramp-up Rate (Liquidus Temp (TL) to peak)**<br>**TS(max) to TL - Ramp-up Rate**<br>**Refow**<br>**- Temperature (TL) (Liquidus)**<br>**- Temperature (tL)**<br>**Peak Temperature (TP)**|60 – 180 seconds<br>3°C/second max.<br>5°C/second max.<br>217°C<br>60 – 150 seconds<br>260+0/-5°C||**Temperature**|**T**L<br>**T**S(max)<br>**T**S(min)||**t**S<br>**Preheat**||||||**t**L||**Ramp-down**||||| ||**Time within 5°C of actual peak Temperature (tp)**|10 – 30 seconds|||**25**||||||||||||||| ||**Ramp-down Rate**<br>**Time 25°C to peak Temperature (TP)**|6°C/second max.<br>8 minutes max.||||**time to peak temperature**<br>**(t 25ºC to peak)**||||||||**Time**|||||| ||**Do not exceed**|260°C|||||||||||||||||| ||||||||||||||||||||| ||**Wave Soldering**<br>260°C, 10 seconds max.||||||||||||||||||| © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 10/11/19 **Surface Mount Fuses** Ceramic Fuse > 438A Series **==> picture [94 x 32] intentionally omitted <==** ## ~~**Product Characteristics**~~ |**Materials**|**Body:**Advanced Ceramic<br>**Terminations:**Ag/Ni/Sn (100% Lead-free)<br>**Element Cover Coating:**Lead-free Glass| |---|---| |**Moisture Sensitivity Level**<br>**Solderability**|IPC/JEDEC J-STD-020, Level 1<br>IPC/EIC/JEDEC J-STD-002, Condition C| |**Humidity Test**|MIL-STD-202, Method 103, Conditions D| |**Resistance to Solder Heat**|MIL-STD-202, Method 210, Condition B| |**Moisture Resistance**|MIL-STD-202, Method 106| ||| |**Thermal Shock**|MIL-STD-202, Method 107, Condition B| |**Mechanical Shock**<br>**Vibration**<br>**Vibration, High Frequency**<br>**Dissolution of Metallization**<br>**Terminal Strength**|MIL-STD-202, Method 213, Condition A<br>MIL-STD-202, Method 201<br>MIL-STD-202, Method 204, Condition D<br>IPC/EIC/JEDEC J-STD-002, Condition D<br>IEC 60127-4| |**High Temperature Storage**|MIL-STD-202 Method 108 with exemptions| |---|---| |**Thermal Shock Test**|JESD22 Method JA-104,<br>Test Conditions B and N| |**Biased Humidity**|MIL-STD-202 Method 103, 85°C/85% RH<br>with 10% operating power for 1000 hrs| |**Operational Life**|MIL-STD-202 Method 108, Test Condition D| |**Resistance To Solvents**|MIL-STD-202 Method 215| |**Mechanical Shock**|MIL-STD-202 Method 213, Test Condition C| ||| |**High Frequency Vibration**|MIL-STD-202, Method 204| |**Resistance To Soldering**<br>**Heat**|MIL-STD-202 Method 210, Test Condition B| |**Solderability**|JESD22-B102E Method 1| |**Terminal Strength For SMD**|AEC Q200-006| |**Board Flex**|AEC Q200-005| |**Electrical Characterization**|3 Temperature Electrical Characterization| **==> picture [522 x 406] intentionally omitted <==** **----- Start of picture text -----**<br> Dimensions Part Marking System<br>1.575±0.152<br>[0.062 ± 0.006]<br>Amp Code Marking Code<br>.250 D<br>0.85 ± 0.150 .375 E<br>[0.033 ± 0.006]<br>.500 F<br>.750 G<br>001. H<br>0.530 +/- 0.150 1.25 J<br>[0.021 +/- 0.006]<br>1.75 L<br>002. N<br>0.508±0.102<br>[0.02±0.004] 02.5 O<br>003. P<br>03.5 R<br>004. S<br>005. T<br>006. U<br>Part Numbering System<br>0.432 +/- 0.150<br>[0.017 +/- 0.006]<br>0438 005. W R A<br>0.60 0.74<br>[0.024] [0.029] Series AEC-Q200 Qualified<br>Packing Code<br>1.00 Amp Code R = Reel Pack<br>[0.039] Quantity Code<br>1.94<br>[0.076]<br>Packaging<br>Packaging Option Packaging Specification Quantity Quantity & Packaging Code<br>8mm Tape and Reel EIA-481, IEC 60286, Part 3 3000 WR<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: www.littelfuse.com/disclaimer-electronics. © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 10/11/19
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.
About Novapart
Novapart is a B2B electronic component broker specialising in stock shortages and cost reduction. We source hard-to-find parts and identify compliant alternatives across a catalogue of 410,000+ components from 500+ manufacturers.
Learn more →Stock Shortage Specialist
When a component is unavailable, discontinued or has an unacceptable lead time, we tap into our network of vetted European and Asian distributors to source what you need — without compromising on quality or traceability.
Request a quote →Compliant Alternatives
We identify pin-to-pin, electrically equivalent substitutes that meet the same certifications (RoHS, AEC-Q100, REACH) as your original specification — validated against datasheets, not just part numbers. Often at a lower cost.
BOM Analysis service →