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31202.5P
CARTRIDGE FUSE, FAST ACTING, 2.5A, 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:2.5A; Voltage Rating VAC:250V; Fuse Size Metric:6.3mm x 32mm; Fuse Size Imperial:1/4" x 1-1/4"; Product Range:312 26K8456
- Fuse Current: 2.5A
- 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: 100A
| Delivery and price | |
|---|---|
| Units per pack | 1000 |
| Price | 0.261 € |
| Current stock | 500+ |
| Lead time | 30 days |
Datasheet
**Axial Lead & Cartridge Fuses** 3AG > Fast Acting > 312/318 Series ## **312/318 Series Lead-Free 3AG, Fast-Acting Fuse PSE** ~~Ie ALi <> © E CE~~ ## **Description** ~~Po~~ The 3AG Fast-Acting Fuse solves a broad range of application requirements while offering reliable performance and cost-effective circuit protection. ~~**Features** Po~~ e In accordance with UL e RoHS compliant and Standard 248-14 Lead-free (except 10mA and 31mA rated e Available in cartridge items) and axial lead format and with various forming dimensions **==> picture [504 x 197] intentionally omitted <==** **----- Start of picture text -----**<br> ||||||| |---|---|---|---|---|---| |Agency Approvals| |Lo| |Agency|Agency File Number|Ampere Range|Po|Applications| |E10480|312 Series: 10mA - 10A/|Used as supplementary protection in appliance or| |318 Series: 31mA - 10A|utilization equipment to provide individual protection for| |@®| |AU1410|312 Series: 12A - 30A|components or internal circuits.| |312 Series: 10mA - 30A| |LR 29862| |318 Series: 31mA - 10A| |Electrical Characteristics for Series| |©|PSE|NBK040205-|312/318 Series: 1A - 10A|Po| |Oo|E10480B/F| |% of Ampere| |Ampere Rating|Opening Time| |Rating| |E10480|318 Series: 12A - 30A| |ck|us| |100%|10mA – 35A|4 hours, Minimum| |312/318 Series:| |SU05001-|135%|10mA – 35A|1 hour, Maximum| |1A/ 1.25A / 1.6A/| |[G|5005/5006/6005/6008| |2A - 10A|10mA – 10A|5 sec., Maximum| |i|G|318 Series: 31mA - 10A312 Series: 10mA - 10A|200%|12A – 30A|10 sec., Maximum| **----- End of picture text -----**<br> **==> picture [245 x 124] intentionally omitted <==** **----- Start of picture text -----**<br> |||| |---|---|---| |Electrical Characteristics for Series| |Po| |% of Ampere| |Ampere Rating|Opening Time| |Rating| |100%|10mA – 35A|4 hours, Minimum| |135%|10mA – 35A|1 hour, Maximum| |10mA – 10A|5 sec., Maximum| |200%|12A – 30A|10 sec., Maximum| |35A|20 sec., Maximum| **----- End of picture text -----**<br> **312/318 Series** © 2009 Littelfuse, Inc. **313** Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/312.html or /318.html for current information. Revised: September 10, 2010 **Introduction to Circuit ProtectionAxial Lead & Cartridge Fuses** 3AG > Fast Acting > 312/318 SeriesTransientology ## ~~**Electrical Characteristic Specifcations by Item**~~ **==> picture [506 x 550] 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>.10 [*] 0.01 250 177.4000 NA x x x [**]<br>.031 [*] 0.031 250 23.6500 0.0000300 x x x<br>.062 0.062 250 24.7000 0.000249 x x x<br>.100 0.1 250 11.2800 0.00102 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 35A@250Vac 3.4200 0.0128 x x x<br>.200 0.2 250 10KA@125Vac 3.0200 0.0165 x x x<br>.250 0.25 250 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 118.0 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 1029 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. **312/318 Series** © 2009 Littelfuse, Inc. **314** Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/312.html or /318.html for current information. **Axial Lead & Cartridge Fuses** 3AG > Fast Acting > 312/318 Series ## ~~**Temperature Rerating Curve**~~ ## ~~**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> ## ~~**Average Time Current Curves**~~ **==> picture [244 x 462] intentionally omitted <==** **----- Start of picture text -----**<br> 1000<br>“f<br>ETAT<br>100<br>| | |<br>| | |<br>|<br>10 | Palette<br>Bia \\"<br>1<br>\\ K\<br>\\\ \ \\\<br>0.1<br>He ARANMAY<br>0.01 ANN<br>0.005 0.01 0.1 1 10 100<br>CURRENT IN AMPERES<br>Please contact Littelfuse for more details on those TFC Curves of other ampere<br>ratings which are not published.<br>Recommended Process Parameters:<br>Wave Parameter Lead-Free Recommendation<br>[oT<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>.031 A .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> **Recommended Hand-Solder Parameters:** ## **Note: These devices are not recommended for IR or Convection Reflow process.** **312/318 Series** © 2009 Littelfuse, Inc. **315** Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/312.html or /318.html for current information. **Introduction to Circuit ProtectionAxial Lead & Cartridge Fuses** 3AG > Fast Acting > 312/318 SeriesTransientology ## ~~**Product Characteristics**~~ **==> picture [241 x 116] intentionally omitted <==** **----- Start of picture text -----**<br> Body: Glass<br>Materials Cap: Nickel–plated brass<br>Leads: Tin–plated Copper<br>Terminal Strength MILSTD-202G, Method 211A,<br>Test Condition A<br>ls<br>Reference IEC 60127 Second Edition<br>Solderability<br>2003-01 Annex A<br>Cap1: Brand logo, current and voltage<br>ratings<br>Product Marking<br>Cap2: Series and agency approval<br>marks<br>**----- End of picture text -----**<br> **==> picture [231 x 133] intentionally omitted <==** **----- Start of picture text -----**<br> Operating<br>Temperature<br>Thermal<br>Shock (5 cycles -65°C to +125°C)<br>Vibration MIL-STD-202G, Method 107G, Test Condition<br>_—_| MIL:STD-202G, Method 201 A<br>MILSTD-202G, Method 103B,<br>Humidity Test Condition A: High RH (95%),<br>and Elevated temperature (40°C) for 240 hours<br>Salt Spray<br>Test Condition B<br>a MILSTD-202G, Method 101D,<br>**----- End of picture text -----**<br> ## ~~**Dimensions**~~ ## ~~**Part Numbering System**~~ **==> picture [455 x 201] intentionally omitted <==** **----- Start of picture text -----**<br> Measurements displayed in millimeters (inches)<br>0312 xxxx M X P<br>312 Series<br>Series<br>6.35<br>(.25") Amp Code<br>Refer to Amp Code column of<br>31.75<br>Electrical Characteristics Table<br>(1.25")<br>Quantity Code<br>M = 1000<br>318 Series<br>0.813 Packaging Code<br>(.032") X = Filler<br>6.985<br>(.275") Lead-free<br>e- e~I—- 32.72 39.68 T =<br>(1.288") (1.56") TYP.<br>Standard Length<br>Axial Lead Material:<br>12.70<br>Tin Coated Copper<br>(0.50") TYP<br>Short Lead Option<br>**----- End of picture text -----**<br> ## ~~**Packaging**~~ |Packaging Option|Packaging Specification|Quantity|Quantity &<br>Packaging Code|Taping Width| |---|---|---|---|---| |**312 Series**||||| |Bulk|N/A|1000|MX|N/A| |Bulk|N/A<br>100<br>~~ee~~|||N/A| |**318 Series**||||| |Bulk<br>Bulk<br>Bulk|N/A<br>1000<br>MX<br>N/A<br>100<br>N/A<br>1000<br>MXB<br>~~ee~~<br>~~ee~~|||N/A<br>N/A<br>N/A| **312/318 Series** © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/312.html or /318.html for current information. **316**
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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