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0312.750HXP
CARTRIDGE FUSE, FAST ACTING, 0.75A, 250V
⚠️ 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: Cartridge Fuses
- Blow Characteristic:Fast Acting; Fuse Current:750mA; Voltage Rating VAC:250V; Fuse Size Metric:6.3mm x 32mm; Fuse Size Imperial:1/4" x 1-1/4"; Product Range:3 26K8443
- Fuse Current: 750mA
- Product Range: 312 Series
- Fuse Size Metric: 6.3mm x 32mm
- Fuse Size Imperial: 1/4" x 1-1/4"
- Voltage Rating VAC: 250V
- Blow Characteristic: Fast Acting
- Breaking Capacity Current AC: 35A
| Delivery and price | |
|---|---|
| Units per pack | 1000 |
| Price | 0.272 € |
| Current stock | 200+ |
| Lead time | 30 days |
Datasheet
**Axial Lead & Cartridge Fuses** 3AG > Fast Acting > 312/318 Series **RoHS Pb PSE** ## 312/318 Series Lead-Free 3AG, F ~~ast-Acting Fuse~~ **Description** The 3AG Fast-Acting Fuse solves a broad range ~~[Po~~ of application requirements while offering reliable performance and cost-effective circuit protection. ## ~~**Features**~~ - In accordance with UL • RoHS compliant and Standard 248-14 Lead-free - Available in cartridge and axial lead format and with various forming dimensions ## ~~**Agency Approvals** Lo~~ **Agency Agency File Number Ampere Range** ~~Po~~ ~~**Applications**~~ **==> picture [228 x 170] intentionally omitted <==** **----- Start of picture text -----**<br> |||| |---|---|---| |Agency|Agency File Number|Ampere Range| |E10480|312 Series: 0.062A - 30A| |®|318 Series: 0.062A - 10A| |312 Series: 0.062A - 30A| |29862| |€|318 Series: 0.062A - 10A| |PS|NBK040205-E10480B/F|312/318 Series 1A-5A| |E| |oO|NBK040205-E10480D/H|312/318 Series 6A-10A| |E10480|318 Series: 12A - 30A| |cs| |SU05001-6008|312/318 Series: 1-2A| |SU05001-5005|312/318 Series: 3-6A| |IG| |SU05001-5006|312/318 Series: 7-10A| |312 Series: 0.062A - 10A| |N/A| |«|318 Series: 0.062A - 10A| **----- End of picture text -----**<br> Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. **==> picture [244 x 113] intentionally omitted <==** **----- Start of picture text -----**<br> |||| |---|---|---| |Electrical Characteristics for Series| |[oT| |% of Ampere| |Ampere Rating|Opening Time| |Rating| |100%|0.062A – 35A|4 hours, Minimum| |135%|0.062A – 35A|1 hour, Maximum| |0.062A – 10A|5 sec., Maximum| |200%|12A – 30A|10 sec., Maximum| |35A|20 sec., Maximum| **----- End of picture text -----**<br> ## **Additional Information** ~~Lo~~ **==> picture [201 x 72] intentionally omitted <==** **----- Start of picture text -----**<br> |||| |---|---|---| |Datasheet|Resources|Samples| |312 Series|312 Series|312 Series| |a| |Datasheet|Resources|Samples| |318 Series|318 Series|318 Series| **----- End of picture text -----**<br> © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Application testing is strongly recommended. Revised: 08/10/15 **==> picture [94 x 32] intentionally omitted <==** **Axial Lead & Cartridge Fuses** 3AG > Fast Acting > 312/318 Series ## ~~**Electrical Characteristic Specifcations by Item**~~ **==> picture [507 x 523] intentionally omitted <==** **----- Start of picture text -----**<br> Voltage Nominal Nominal Agency Approvals<br>Amp Ampere Interrupting Cold<br>Code Rating (A) Rating (V) Rating Resistance I [2] Melting t (A [2] sec) PSE<br>(Ohms)<br>.062 0.062 250 24.7000 0.000249 x x x<br>.100 0.1 250 11.2800 0.00171 x x x<br>.125 0.125 250 7.1450 0.00289 x x x<br>.150 0.15 250 5.1300 0.00550 x x x<br>.175 0.175 250 3.8750 0.00960 x x x<br>.187 0.187 250 3.4200 0.0128 x x x<br>.200 0.2 250 35A@250Vac 3.0200 0.0165 x x x<br>.250 0.25 250 10KA@125Vac 2.0100 0.0355 x x x<br>.300 0.3 250 1.4050 0.0689 x x x<br>.375 0.375 250 0.8250 0.185 x x x<br>.500 0.5 250 0.4980 0.483 x x x<br>.600 .6 250 0.3620 0.880 x x x<br>.750 0.75 250 0.2445 1.84 x x x<br>001. 1 250 0.1900 0.760 x x x x x<br>1.25 1.25 250 0.1385 1.45 x x x x x<br>01.5 1.5 250 0.1036 2.35 x x x x<br>01.6 1.6 250 0.0934 2.80 x x x x x<br>1.75 1.75 250 0.0856 3.60 x x x x<br>100A@250Vac<br>01.8 1.8 250 0.0825 3.85 x x x x<br>10KA@125Vac<br>002. 2 250 0.0704 5.20 x x x x x<br>2.25 2.25 250 0.0594 7.20 x x x x x<br>02.5 2.5 250 0.0513 9.54 x x x x x<br>003. 3 250 0.0427 14.0 x x x x x<br>004. 4 250 0.0293 28.5 x x x x x<br>005. 5 250 0.0224 50.0 x x x x x<br>006. 6 250 200A@250Vac 0.0178 118.0 x x x x x<br>007. 7 250 10KA@125Vac 0.0146 81.0 x x x x x<br>008. 8 250 0.0122 166.0 x x x x x<br>010. 10 250 0.0093 298.0 x x x x x<br>012. [*] 12 32 0.0072 234.6 x x [**] x<br>015. [*] 15 32 0.0052 490.5 x x [**] x<br>020. [*] 20 32 300A@32 Vac 0.0035 1414 x x [**] x<br>025. [*] 25 32 0.0024 2041 x x [**] x<br>030. [*] 30 32 0.0019 3717 x x [**] x<br>035. 35 32 0.0013 7531<br>**----- End of picture text -----**<br> NOTES: - ** For 318 Series 12A to 30A, the agency approval is only cURus. © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/10/15 **Axial Lead & Cartridge Fuses** 3AG > Fast Acting > 312/318 Series **==> picture [93 x 32] intentionally omitted <==** **==> picture [261 x 19] intentionally omitted <==** **----- Start of picture text -----**<br> Temperature Re-rating Curve<br>**----- End of picture text -----**<br> **==> picture [261 x 475] intentionally omitted <==** **----- Start of picture text -----**<br> Average Time Current Curves<br>1000<br>100<br>10<br>1<br>0.1<br>0.01<br>0.005 0.01 0.1 1 10 100<br>CURRENT IN AMPERES<br>Please contact Littelfuse for more details on those T-C Curves of other ampere<br>ratings which are not published.<br>Recommended Process Parameters:<br>Wave Parameter Lead-Free Recommendation<br>Preheat:<br>(Depends on Flux Activation Temperature) (Typical Industry Recommendation)<br> Temperature Minimum: 100°C<br> Temperature Maximum: 150°C<br> Preheat Time: 60-180 seconds<br>Solder Pot Temperature: 260°C Maximum<br>Solder Dwell Time: 2-5 seconds<br>.062 A .125 A .250 A .375 A.500 A .750 A 1 A 1.5 A 2 A2.5 A3 A4 A5 A 6 A7 A 8 A 10 A<br>TIME IN SECONDS<br>**----- End of picture text -----**<br> **==> picture [244 x 200] intentionally omitted <==** Note: Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation. ## ~~**Soldering Parameters - Wave Soldering**~~ **==> picture [243 x 172] intentionally omitted <==** **----- Start of picture text -----**<br> 300<br>280<br>260<br>240<br>220<br>200<br>180<br>160<br>140<br>120<br>100<br>80<br>60<br>40<br>20<br>0<br>Time (Seconds)<br>Preheat Time Cooling Time<br>Dwell Time<br>Temperature (°C) - Measured on bottom side of board 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240<br>**----- End of picture text -----**<br> ## **Recommended Hand-Solder Parameters:** Solder Iron Temperature: 350°C +/- 5°C Heating Time: 5 seconds max. **Note: These devices are not recommended for IR or Convection Reflow process.** © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/10/15 **Axial Lead & Cartridge Fuses** 3AG > Fast Acting > 312/318 Series **==> picture [94 x 32] intentionally omitted <==** ||~~**Product Characteristics**~~|~~**Product Characteristics**~~|||||| |---|---|---|---|---|---|---|---| ||||||||| ||**Materials**<br>**Terminal Strength**<br>**Solderability**<br>**Product Marking**|Body: Glass<br>Cap: Nickel–plated brass<br>Leads: Tin–plated Copper<br>MIL-STD-202, Method 211,<br>Test Condition A<br>MIL-STD-202 method 208<br>Cap1:<br>Brand logo, current and voltage<br>ratings<br>Cap2:<br>Series and agency approval|||**Operating**<br>**Temperature**<br>**Thermal**<br>**Shock**<br>**Vibration**<br>**Humidity**|–55ºC to +125ºC<br>MIL-STD-202, Method 107, Test Condition B: (5<br>cycles -65°C to +125°C)<br>MIL-STD-202, Method 201<br>MIL-STD-202, Method 103,<br>Test Condition A: High RH (95%),<br>and Elevated temperature (40°C) for 240 hours|| |||marks|||**Salt Spray**|MIL-STD-202, Method 101,<br>Test Condition B|| ||||||||| ||~~**Dimensions**~~||||~~**Part Numbering System**~~||| Measurements displayed in millimeters (inches) **==> picture [236 x 114] intentionally omitted <==** **----- Start of picture text -----**<br> 312 000 Series 318 000 Series<br>(cartridge) (axial leaded)<br>6.35±0.3 6.985±0.3<br>(.25") (.275")<br>31.75±1.12 32.72±1.12<br>(1.25") (1.288")<br>Axial Lead Diameter: Axial Lead Length:<br>0.81±0.05 (.032") Standard Length:<br>39.68 (1.56") TYP.<br>Axial Lead Material: Short Lead Option:<br>Tin-coated copper 12.70 (0.50”) TYP<br>**----- End of picture text -----**<br> **==> picture [147 x 132] intentionally omitted <==** **----- Start of picture text -----**<br> 0312 xxxx M X P<br>Series<br>Amp Code<br>Refer to Amp Code column of<br>Electrical Characteristics Table<br>Quantity Code<br>M = 1000<br>Packaging Code<br>X = Filler<br>Lead-free<br>**----- End of picture text -----**<br> ## ~~**Packaging**~~ **==> picture [506 x 124] intentionally omitted <==** **----- Start of picture text -----**<br> Quantity &<br>Packaging Option Packaging Specification Quantity Taping Width<br> Packaging Code<br>312 Series<br>Bulk N/A 1000 MX N/A<br>Bulk N/A 100 HX N/A<br>318 Series<br>Bulk N/A 1000 MX N/A<br>Bulk N/A 100 HX N/A<br>Bulk N/A 1000 MXB N/A<br>**----- End of picture text -----**<br> © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/10/15
Updated at June 4, 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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