0313.400MXP

Fuse, Cartridge, Slow Blow, 400 mA, 250 V, 6.3mm x 32mm, 1/4" x 1-1/4", Slo-Blo 313 Series

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Manufacturer: LITTELFUSE
Product type: Cartridge Fuses
Blow Characteristic:Time Delay; Fuse Current:400mA; Voltage Rating VAC:250V; Fuse Size Metric:6.3mm x 32mm; Fuse Size Imperial:1/4" x 1-1/4"; Product Range:313 Series; Breaking Capa
SVHC: No SVHC (25-Jun-2020)
Fuse Current: 400mA
Product Range: Slo-Blo 313 Series
Fuse Size Metric: 6.3mm x 32mm
Fuse Size Imperial: 1/4" x 1-1/4"
Voltage Rating VAC: 250V
Blow Characteristic: Slow Blow
Breaking Capacity Current AC: 35A

Delivery and price
Units per pack	1000
Price	0.554 €
Current stock	10+
Lead time	30 days

Datasheet

**Axial Lead & Cartridge Fuses** 3AG > Slo-Blo[®] Fuse > 313/315 Series 

~~**RoHS Pb**~~ **PSE** ~~rIO@MWEWO KE~~ 

## 313/315 Series Lead-Free 3AG, Sl ~~o-Blo[®] Fuse~~ 

**Description** The 3AG Slo-Blo[®] fuse solves a broad range of application ~~Lo~~ requirements while offering reliable performance and costeffective circuit protection. 

The fuse catalog number with the suffix “ID” instantly identifies itself upon opening by showing a discoloration of its glass body. Guesswork and time consuming circuit testing are eliminated. This unique design offers the same quality performance characteristics as the standard 3AG Slo-Blo[®] Fuse design. 

|~~**Agency Approvals**~~<br>**Agency**<br>**Agency File Number**<br>**Ampere Range**<br>~~_ {SEE ~~|~~**Agency Approvals**~~<br>**Agency**<br>**Agency File Number**<br>**Ampere Range**<br>~~_ {SEE ~~|~~**Features**~~<br>• In accordance with UL<br>Standard 248-14<br>• RoHS compliant and<br>Lead-free<br> ~~Lo~~|
|---|---|---|
|E10480<br>)|0.010A - 10A**|• Available in cartridge<br>and axial lead format|
|29862<br>a|0.010A - 10A**/15A**|and with various forming<br>dimensions|
|E10480<br>**PS**<br>**E**<br>NBK040205-E10480B/F<br>NBK040205-E10480D/H<br>~~”~~<br>~~>~~|10A - 30A<br>1-5A<br>6.25- 10A**/15A**|~~**Applications**~~<br>Used as supplementary protection in appliance or<br>~~[Fo~~|
|SU05001-6004<br>SU05001-5007<br>SU05001-5008<br>SU05001-5009<br>[G|2.25-2.5A<br>2.8A - 3.2A<br>4A - 6.3A<br>7A-8A|utilization equipment to provide individual protection for<br>components or internal circuits.|
|N/A<br><~~3~~|0.010A - 10A**/15A**|~~**Electrical Characteristics by Series**~~<br>~~Po~~|



~~**Applications** [Fo~~ Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. 

|~~**Electrical Characteristics by Series**~~<br>~~Po~~|~~**Electrical Characteristics by Series**~~<br>~~Po~~|
|---|---|
|% of Ampere<br>Rating<br>Ampere Rating|Opening Time|
|100%<br>10mA – 30A<br>135%<br>10mA – 30A|4 hours, Minimum<br>1 hour, Maximum|
|200%<br>10mA – 15A<br>20A – 30A|5 sec., Min.,<br>30 sec., Max<br>5 sec., Min.,<br>60 sec Max|



** See note under Electrical Characteristics by item 

## **Additional Information** [Lo 

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Datasheet Resources Samples<br>313 Series 313 Series 313 Series<br>@<br>Datasheet Resources Samples<br>315 Series 315 Series 315 Series<br>**----- End of picture text -----**<br>


© 2015 Littelfuse, Inc. Specifications are subject to change without notice. Application testing is strongly recommended. Revised: 07/15/15 

**Axial Lead & Cartridge Fuses** 3AG > Slo-Blo[®] Fuse > 313/315 Series 

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## ~~**Electrical Characteristic Specifcations by Item**~~ 

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Nominal  Agency Approvals<br>Amp  Ampere  Voltage  Interrupting Cold  Nominal<br>Code Rating (A) Rating (V) Rating Resistance  I [2] Melting t (A [2]  sec) PSE<br>(Ohms)<br>.010 0.01 250 4300.0000 0.000121 x x x<br>.031 0.031 250 430.0000 0.00303 x x x<br>.040 0.04 250 300.0000 0.00630 x x x<br>.062 0.062 250 120.0000 0.0210 x x x<br>.100 0.1 250 43.0000 0.0850 x x x<br>.125 0.125 250 30.0000 0.152 x x x<br>.150 0.15 250 20.0000 0.270 x x x<br>.175 0.175 250 8.6700 0.177 x x x<br>.187 0.187 250 8.0100 0.230 x x x<br>.200 0.2 250 35A@250Vac 6.5900 0.270 x x x<br>.250 0.25 250 10KA@125Vac 4.2700 0.385 x x x<br>.300 0.3 250 3.1350 0.730 x x x<br>.375 0.375 250 2.0950 1.23 x x x<br>.400 0.4 250 1.8750 1.35 x x x<br>.500* 0.5 250 1.2600 2.55 x x x<br>.600 0.6 250 0.9120 4.00 x x x<br>.700 0.7 250 0.7000 5.90 x x x<br>.750 0.75 250 0.6215 7.16 x x x<br>.800 0.8 250 0.5540 8.00 x x x<br>001.* 1 250 0.3750 14.0 x x x x<br>01.2 1.2 250 0.2780 21.5 x x x x<br>1.25 1.25 250 0.2600 24.0 x x x x<br>01.5* 1.5 250 0.1910 38.0 x x x x<br>01.6 1.6 250 0.1710 49.6 x x x x<br>01.8 1.8 250 0.1410 92.0 x x x x<br>100A@250Vac<br>002.* 2 250 0.1169 77.0 x x x x<br>10KA@125Vac<br>2.25 2.25 250 0.0968 121 x x x x x<br>02.5 2.5 250 0.0811 199 x x x x x<br>02.8 2.8 250 0.0675 269 x x x x x<br>003.* 3 250 0.0593 200 x x x x x<br>03.2 3.2 250 0.0529 209 x x x x x<br>004.* 4 250 0.0311 76.1 x x x x x<br>005.* 5 250 0.0214 276 x x x x x<br>6.25* 6.25 250 0.0154 388 x x x x x<br>200A@250Vac<br>06.3 6.3 250 0.0154 388 x x x x x<br>10KA@125Vac<br>007.* 7 250 0.0128 547 x x x x x<br>008.* 8 250 0.0111 701 x x x x x<br>010.** 10 250 0.0083 1285 x x x x<br>010.* 10 32 0.0083 1285 x<br>012. 12 32 0.0065 1200 x<br>015.** 15 125 0.0050 2650 x x x x<br>015. 15 32 300A@32Vac 0.0050 2650 x<br>020. 20 32 0.0022 9560 x<br>025. 25 32 0.0017 16500 x<br>030. 30 32 0.0012 26900 x<br>**----- End of picture text -----**<br>


- For 313series, these ratings available with an indicating option. Add the “ID” designation to the series number. i.e.   313.500ID. 

- ** These 2 ratings are designed for special voltage requirement. For 10A, it is available as 250Vac rated and the part number is 0313010.MX250P; For 15A, it is available as 125Vac rated and the part number is 0315015.MX125P. 

© 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 07/15/15 

**Axial Lead & Cartridge Fuses** 3AG > Slo-Blo[®] Fuse > 313/315 Series 

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Temperature Re-rating Curve<br>**----- End of picture text -----**<br>


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A<br>B<br>B<br>A<br>**----- End of picture text -----**<br>


## **A - For 313/315 Series, from 10mA to 150mA** 

## **B - For all other ampere ratings of 313/315 series** 

Note: 

Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation. 

## ~~**Soldering Parameters - Wave Soldering**~~ 

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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**~~ 

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1000<br>100<br>10<br>1<br>0.1<br>0.01<br>0.05 0.1 1 10 100 1000<br>CURRENT IN AMPERES<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>1/16A 1/10A 15/100.175A 1/4A 3/8A 1/2A 3/4A 1A 1 1/2A 2A 3A 4A 5A 7A 8A 10A 12A15A 20A25A 30A<br>TIME IN SECONDS<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: 07/15/15 

**Axial Lead & Cartridge Fuses** 3AG > Slo-Blo[®] Fuse > 313/315 Series 

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||~~**Product Characteristics**~~|~~**Product Characteristics**~~|||||
|---|---|---|---|---|---|---|
||||||||
||**Materials**<br>**Terminal Strength**<br>**Solderability**|Body: Glass<br>Cap: Nickel–plated brass<br>Leads: Tin–plated Copper<br>MIL-STD-202, Method 211,  Test<br>Condition A<br>MIL-STD-202 method 208||**Operating**<br>**Temperature**<br>**Thermal Shock**<br>**Vibration**|–55ºC to +125ºC<br>MIL-STD-202, Method 107,  Test Condition<br>B: (5 cycles -65°C to +125°C)<br>MIL-STD-202, Method 201||
||**Product Marking**|Cap1:  Brand logo, current and voltage<br>ratings<br>Cap2:  Series and agency approval marks||**Humidity**|MIL-STD-202, Method 103,  Test<br>Condition A: High RH (95%) and Elevated<br>temperature (40°C) for 240 hours||
|||||**Salt Spray**|MIL- STD-202, Method 101, Test<br>Condition B||



## ~~**Dimensions**~~ 

## ~~**Part Numbering System**~~ 

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Measurements displayed in millimeters (inches)<br>313  000P  Series 315  000P  Series<br>(cartridge) (axial leaded)<br>6.35±0.3  6.985±0.3<br>(.25") (.275")<br>31.75±1.12 32.39±1.12<br>(1.25") (1.275")<br>Axial Lead Diameter: Axial Lead Length:<br>0.81±0.05 (.032") for 38.1±3.15 (1.50") TYP.<br>(0.01A - 15A)<br>1.02±0.06 (.040") for(0.01A - 15A) Axial Lead Material:<br>(20A - 30A) Tin-coated copper<br>**----- End of picture text -----**<br>


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Measurements displayed in millimeters (inches) 0313 xxxx M X P<br>313  000P  Series 315  000P  Series<br>(cartridge) (axial leaded) Series<br>6.35±0.3  6.985±0.3  Amp Code<br>(.25") (.275") Refer to Amp Code column of<br>Electrical Characteristics Table<br>31.75±1.12 32.39±1.12<br>(1.25") (1.275") Quantity Code<br>Axial Lead Diameter: Axial Lead Length: M = 1000<br>0.81±0.05 (.032") for 38.1±3.15 (1.50") TYP.<br>1.02±0.06 (.040") for(0.01A - 15A) Axial Lead Material:  Packaging Code X = Filler<br>(20A - 30A) Tin-coated copper<br>Lead-free<br>Packaging<br>Quantity &<br>Packaging Option Packaging Specification Quantity Taping Width<br> Packaging Code<br>313 Series<br>Bulk N/A 1000 MX N/A<br>Bulk N/A 100 HX N/A<br>315 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: 07/15/15

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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