0325020.HXP

CARTRIDGE FUSE, SLOW BLOW, 20A, 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:Slow Blow; Fuse Current:20A; Voltage Rating VAC:250V; Fuse Size Metric:6.3mm x 32mm; Fuse Size Imperial:1/4" x 1-1/4"; Product Range:Slo-Blo 3 26K8663
Breaking Capacity Current AC: 400A

Delivery and price
Units per pack	1000
Price	1.63 €
Current stock	10+
Lead time	30 days

Datasheet

**Axial Lead & Cartridge Fuses** 3AB > Slo-Blo[®] Fuse > 325/326 Series 

**RoHS** ~~**P**~~ **b PSE** ~~_I@k@OEGMWCECA~~ 

## 325/326 Series Lead-Free 3AB, Slo-Blo ~~[®] Fuse~~ 

## **Description** ~~[Po~~ 

The 3AB Slo-Blo[®] Fuse with ceramic body construction permits higher interrupting ratings and voltage ratings. Ideal for applications where high current loads are expected. 

## ~~**Features**~~ 

- In accordance with UL • RoHS compliant and Standard 248-14 Lead-free 

## ~~**Agency Approvals** Lo~~ 

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||||
|---|---|---|
|Agency|Agency File Number|Ampere Range|
|E10480|0.250A - 10A|
|®|
|E10480|12A - 30A|
|Al|
|29862|0.250A - 30A|
|G.|
|Cartridge:|
|NBK 030805-E10480A|1A-3.2A|
|NBK 030805-E10480C|4A-5A|
|NBK 030805-E10480E|6.25A-15A|
|PS|NBK 260106-JP1021A|20A-30A|
|E|Leaded:|
|NBK 030805-E10480B|1A-3.2A|
|NBK 030805-E10480D|4A-5A|
|NBK 030805-E10480F|6.25A-15A|
|NBK 260106-JP1021B|20A-30A|
|SU05001-5010|7-10A|
|SU05001-5011|12A, 15A|
|-|SU05001-5012|20A|
|IG|
|SU05001-6006|2.8A-3.2A|
|SU05001-6007|2.5A|
|T 50239752 01|*12A/*15A/*20A|
|A|
|N/A|0.010A - 30A|

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* Approved for cartridge version only 

- Available in cartridge and axial lead format and with various forming dimensions 

## ~~**Applications** [Po~~ 

Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. 

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Electrical Characteristics for Series<br>Lo<br>% of Ampere<br>Ampere Rating Opening Time<br>Rating<br>100% 0.010A – 30A 4 hours, Minimum<br>135% 0.010A – 30A 1 hour, Maximum<br>0.010A – 3.2A 5 sec., Min., 30 sec., Max.<br>200%<br>4A – 30A 5 sec., Min., 60 sec., Max.<br>———<br>Additional Information<br>e<br>Datasheet Resources Samples Accessories<br>325 Series 325 Series 325 Series 325 Series<br>a<br>Datasheet Resources Samples Accessories<br>326 Series 326 Series 326 Series 326 Series<br>**----- End of picture text -----**<br>


For recommended fuse accessories for this product series, see ‘Recommended Accessories’ section. 

© 2016 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/16/16 

Application testing is strongly recommended. 

**Axial Lead & Cartridge Fuses** 3AB > Slo-Blo[®] Fuse > 325/326 Series 

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

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Ampere  Voltage  Nominal Cold  Nominal  Agency Approvals<br>Amp  Interrupting<br>Code Rating(A) Rating (V) Rating Resistance (Ohms) I [2] Melting t (A [2 ] sec) PSE<br>.010 0.01 250 3324.8000 0.00013 x<br>.031 0.031 250 332.5000 0.0110 x<br>.062 0.062 250 91.7000 0.0276 x<br>.100 0.1 250 33.5500 0.0870 x<br>.125 0.125 250 100A@250Vac 22.4500 0.100 x<br>.150 0.15 250 15.4500 0.143 x<br>.175 0.175 250 8.9200 0.350 x<br>.187 0.187 250 7.7250 0.330 x<br>.200 0.2 250 6.7700 0.316 x<br>.250 0.25 250 4.4300 0.804 x x x<br>.300 0.3 250 3.2200 1.230 x x x<br>.375 0.375 250 2.1550 1.20 x x x<br>.400 0.4 250 1.9350 1.33 x x x<br>.500 0.5 250 1.3000 4.80 x x x<br>.600 0.6 250 0.9495 3.90 x x x<br>.700 0.7 250 0.7215 6.42 x x x<br>.750 0.75 250 0.6410 13.00 x x x<br>.800 0.8 250 100A@250Vac 0.5725 8.20 x x x<br>10KA@125Vac<br>001. 1 250 10KA@125Vdc 0.3890 16.3 x x x x<br>01.2 1.2 250 0.2860 22.0 x x x x<br>1.25 1.25 250 0.2680 40.0 x x x x<br>01.5 1.5 250 0.1975 59.7 x x x x<br>01.6 1.6 250 0.1760 66.0 x x x x<br>002. 2 250 0.1210 118.0 x x x x<br>02.5 2.5 250 0.0835 185.0 x x x x x<br>02.8 2.8 250 0.0695 232.0 x x x x x<br>003. 3 250 0.0605 200.0 x x x x x<br>100A@250Vac<br>03.2 3.2 250 0.0539 214.0 x x x x x<br>10KA@125Vac<br>004. 4 250 0.0761 9.71 x x x x<br>005. 5 250 0.0522 25.0 x x x x<br>6.25 6.25 250 400A@250Vac 0.0346 60.4 x x x x<br>10KA@125Vac<br>007. 7 250 10KA@125Vdc 0.0227 47.3 x x x x x<br>008. 8 250 0.0193 67.1 x x x x x<br>010. 10 250 0.0132 137 x x x x x<br>400A@250Vac<br>012. 12 250 10KA@125Vac 0.0067 129 x x x x x*** x<br>600A@125Vdc<br>012.* 12 250 1500A@250Vac 0.0011 618 x x x<br>400A@250Vac<br>015. 15 250 10KA@125Vac 0.0050 245 x x x x x*** x<br>600A@125Vdc<br>015.* 15 250 1500A@250Vac 0.0083 760 x x x<br>400A@250Vac<br>020. 20 250 10KA@125Vac 0.0034 575 x x x x x*** x<br>600A@125Vdc<br>020.* 20 250 1500A@250Vac 0.0042 2500 x x x<br>025.** 25 250 1500A@250Vac 0.0032 4682 x x<br>025. 25 250 400A@250Vac 0.0024 1030 x x x x<br>10KA@60Vdc<br>030. 30 250 600A@125Vdc 0.0019 1690 x x x x<br>**----- End of picture text -----**<br>


- *Higher i[2] t version available. Please add suffix “D” to part numbers. For instance, 0325020.MXDP, 0326020.MXDP I[2] t test at 10× rated current. 

- **Higher I[2] t version available. Please add suffix “W” to part numbers. For instance, 0325025.MXWP 

- ***Approved for cartridge versions only, and interrupting rating is 400A@125Vac and 400A@250Vac © 2016 Littelfuse, Inc. Specifications are subject to change without notice. 

Revised: 12/16/16 

**Axial Lead & Cartridge Fuses** 3AB > Slo-Blo[®] Fuse > 325/326 Series 

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


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Average Time Current Curves<br>**----- End of picture text -----**<br>


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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>.375A .500A .750A1.0A1.5A 2.0A 2.5A 3.0A 3.5A 4.0A5.0A 6.25A 7.0A8.0A 10.0A 12.0A15.0A 20.0A25.0A 30.0A<br>TIME IN SECONDS<br>**----- End of picture text -----**<br>


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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>


## **Recommended Process Parameters:** 

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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>**----- 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.** 

© 2016 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/16/16 

**Axial Lead & Cartridge Fuses** 3AB > Slo-Blo[®] Fuse > 325/326 Series 

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Product Characteristics<br>Body: Ceramic Operating Temperature –55ºC to +125ºC<br>Materials Cap: Nickel–plated brass MIL-STD-202, Method 107, Test<br>Leads: Tin–plated Copper Thermal Shock Condition B:(5 cycles - 65ºC to<br>Terminal Strength MIL-STD-202, Method 211, 125ºC)<br>Test Condition A<br>Vibration: MIL-STD-202, Method 201<br>Solderability MIL-STD-202 Method 208 MIL-STD-202, Method 103, Test<br>Condition A: High RH (95%) and<br>Cap1:  Brand logo, current and voltage  Humidity<br>Elevated temperature(40ºC) for 240<br>ratings<br>Product Marking hours<br>Cap2:  Series and agency approval<br>marks Salt Spray MIL-STD-202, Method 101, Test<br>Condition B<br>Dimensions Part Numbering System<br>Measurements displayed in millimeters (inches)<br>0325 xxxx M X P<br>326  000P  Series 325  000P  Series<br>(cartridge) (axial leaded)<br>Series<br>6.35±0.3  6.985±0.3  Amp Code<br>(.25") (.275") Refer to Amp Code column of<br>31.75±1.12 32.72±1.12 Electrical Characteristics Table<br>(1.25") (1.288") 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>(0.01A - 15A) 52±1(2.0”) for long lead Packaging Code<br>1.02±0.06 (.040") for X = Filler<br>(20A - 30A) Axial Lead Material:<br>Tin-coated copper Lead-free<br>Packaging<br>**----- End of picture text -----**<br>


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Quantity &<br>Packaging Option Packaging Specification Quantity Taping Width<br> Packaging Code<br>325 Series<br>Bulk N/A 5 VX N/A<br>Bulk N/A 100 HX N/A<br>Bulk N/A 1000 MX N/A<br>Bulk N/A 1000 MX52 (long lead) N/A<br>Bulk N/A 1000 MX52L (long lead) N/A<br>Bulk N/A 1000 MXD N/A<br>Bulk N/A 1000 MXF31 N/A<br>Bulk N/A 1000 MXW N/A<br>326 Series<br>Bulk N/A 5 VX N/A<br>Bulk N/A 100 HX N/A<br>Bulk N/A 1000 MX N/A<br>Bulk N/A 1000 MXCC N/A<br>Bulk N/A 1000 MXD N/A<br>**----- End of picture text -----**<br>


© 2016 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/16/16 

**Axial Lead & Cartridge Fuses** 3AB > Slo-Blo[®] Fuse > 325/326 Series 

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## ~~**Recommended Accessories**~~ 

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Max  Max<br>Accessory<br>Series Description Application  Application<br>Type<br>Voltage Amperage<br>155100 Twist-Lock In-Line Fuseholder 32 20<br>342 Traditional Panel Mount Fuseholder 250 20<br>Holder<br>346 Panel Mount Flip-Top Shock-Safe Fuseholder 250 15<br>345 Shock-Safe Fuseholder with PC Mount, Solder Mount and Panel Mount options 250 20<br>354 Low Profile OMNI-BLOK [®]  Fuse Block 30<br>Block 600<br>359 High Current Screw Terminal Fuse Block  30<br>122 High Current Traditional PC Board Fuse Clip  1000 30<br>Clip<br>101 Rivet/Eyelet Type Fuse Clip 1000 15<br>**----- End of picture text -----**<br>


Notes: 

1. Do not use in applications above rating. 

2. Please refer to fuseholder data sheet for specific re-rating information. 

3. Please contact Littelfuse for applications greater than the max voltage and amperage shown. 

© 2016 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/16/16

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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