023503.5MXP

CARTRIDGE FUSE, FAST ACTING, 3.5A, 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:3.5A; Voltage Rating VAC:250V; Fuse Size Metric:5mm x 20mm; Fuse Size Imperial:0.2" x 0.79"; Product Range:235 Se 32M4179
Fuse Current: 3.5A
Product Range: 235 Series
Fuse Size Metric: 5mm x 20mm
Fuse Size Imperial: 0.2" x 0.79"
Voltage Rating VAC: 250V
Blow Characteristic: Fast Acting
Breaking Capacity Current AC: 100A

Delivery and price
Units per pack	1000
Price	0.278 €
Current stock	200+
Lead time	30 days

Datasheet

**Axial Lead & Cartridge Fuses** 5×20 mm > Time-Lag > 235 Series 

~~**RoHS Pb**~~ **PSE** ~~| |IOE@MOE CE~~ 

## 235 Series, 5×20 mm, Fast-Acting Fu ~~se~~ 

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

5×20mm fast-acting glass body cartridge fuse designed to UL specification. 

## ~~**Features**~~ 

- Designed to UL/CSA/ • RoHS compliant and ANCE 248 Standard lead-free 

- Available in cartridge and axial lead format 

## ~~**Agency Approvals** es~~ §=— 

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Agency Agency File Number Ampere Range<br>Cartridge:<br>   NBK030609-JP1021A 1A - 3.5A<br>   NBK190609-JP1021A 4A -5A<br>PS    NBK030609-JP1021B 6A -7A<br>E Leaded:<br>or<br>   NBK030609-JP1021C 1A - 3.5A<br>   NBK190609-JP1021B 4A -5A<br>   NBK030609-JP1021D 6A -7A<br>   SU05001 – 3007 0.100A – 0.400A<br>   SU05001 – 2002 0.500A – 3A<br>[G    SU05001 – 2003 4A – 6A<br>E10480 0.100A - 7A<br>@. 29862 0.100A - 7A<br>N/A 0.100A – 7A<br>**----- End of picture text -----**<br>


## ~~**Applications**~~ 

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 Rating Ampere Rating Opening Time<br>100% 4 hours, Minimum<br>135% 0.100A – 7A 1 hour, Maximum<br>|<br>200% 5 seconds, Maximum<br>Additional Information<br>Lo<br>gi<br>Datasheet Resources Samples Accessories<br>For recommended fuse accessories for this product series,<br>see ‘Recommended Accessories’ section.<br>**----- End of picture text -----**<br>


© 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BA.08/26/20 

**Axial Lead & Cartridge Fuses** 5×20 mm > Time-Lag > 235 Series 

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Electrical Characteristic Specifcations by Item<br>Voltage  Nominal Cold  Agency Approvals<br>Amp Code Amp Rating(A) Rating (V) InterruptingRating Resistance (Ohms) Nominal Melting I [2] t (A [2]  sec) PSE<br>.100 0.1 250 8.4000 0.00127 x x x - x<br>.125 0.125 250 5.7500 0.00273 x x x - x<br>.200 0.2 250 3.1500 0.00867 x x x - x<br>.250 0.25 250 2.2500 0.01660 x x x - x<br>.300 0.3 250 35A @ 250VAC 1.6000 0.03215 x x x - x<br>.400 0.4 250 10kA @ 125VAC 1.075 0.05845 x x x - x<br>.500 0.5 250 0.4265 0.06915 x x x - x<br>.600 0.6 250 0.3195 0.11200 x x x - x<br>.700 0.7 250 0.2625 0.15600 x x x - x<br>.800 0.8 250 0.1920 0.25300 x x x - x<br>001. 1 250 0.1530 0.46750 x x x x x<br>1.25 1.25 250 0.1055 1.08500 x x x x x<br>01.6 1.6 250 0.0758 2.02500 x x x x x<br>100A @ 250VAC<br>002. 2 250 0.0603 2.64500 x x x x x<br>10kA @ 125VAC<br>02.5 2.5 250 0.0437 5.44500 x x x x x<br>003. 3 250 0.0347 8.39500 x x x x x<br>03.5 3.5 250 0.0331 17.14000 x x - x -<br>004. 4 125 0.0246 17.14000 x x x x x<br>005. 5 125 0.0184 27.41000 x x x x x<br>10kA @ 125VAC<br>006. 6 125 0.0148 47.32500 x x x x x<br>007. 7 125 0.0157 64.81500 x x - x -<br>**----- End of picture text -----**<br>


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


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Average Time Current Curves<br>10000<br>1000<br>100<br>10<br>1<br>0.1<br>0.01<br>0.1 1 10 100 1000<br>CURRENT IN AMPERES<br>0.100A 0.125A 0.200A 0.250A 0.300A 0.400A 0.500A 0.600A 0.700A 0.800A 1A 1.25A 1.6A 2A 2.5A 3A 4A 5A 6A<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. 

Please contact Littelfuse for details on T-C curve for 7A rating 

© 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BA.08/26/20 

**Axial Lead & Cartridge Fuses** 5×20 mm > Time-Lag > 235 Series 

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## ~~**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. 

## ~~**Product Characteristics**~~ 

||Body: Glass|
|---|---|
|**Materials**|Cap: Nickel–plated brass<br>Leads: Tin–plated Copper|
|**Terminal Strength**|MIL-STD-202, Method 211. Test Condition A|
|**Solderability**|MIL-STD-202 Method 208|
|**Product Marking**|Cap 1: Brand logo, current and voltage rating<br>Cap2: Series and agencyapproval markings|
|**Packaging**|Available in Bulk (M=1000 pcs/pkg) or on Tape/Reel<br>(MRET1=1000pcs/reel)|



|**Operating Temperature**|–55ºC to +125ºC|
|---|---|
|**Thermal Shock**|MIL-STD-202, Method 107, Test Condition B: (5<br>cycles –65OC  + 125OC)|
|**Vibration**|MIL-STD-202, Method 201|
|**Humidity**|MIL-STD-202, Method 103, Test Condition A<br>high RH (95%) and elevated temperature (40O<br>C)for 240hours|
|**Salt Spray**|MIL-STD-202, Method 101, Test Condition B|



© 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BA.08/26/20 

**Axial Lead & Cartridge Fuses** 5×20 mm > Time-Lag > 235 Series 

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Dimensions Part Numbering System<br>20+0.5 0235 xxxx M X E P<br>5.2+0.1<br>0235000P<br>-0.2 Series<br>5.1+0.6 5.1+0.6 Amp Code<br>Refer to Amp Code column of<br>Electrical Characteristics Table<br>5.6±0.4 Quantity Code<br>40±1.0 21.5±1.0<br>0235.100 XEP M = 1000<br>to<br>0235.400 XEP Packaging Code<br>0.65±0.05 X = Filler<br>Option Code<br>E = Axial Leaded<br>Lead-free<br>5.5±0.3<br>40±1.0 21.5±1.0<br>0235.500 XEP<br>to<br>0235007.XEP<br>See Notes*<br>All dimensions in mm<br>Notes:<br>**----- End of picture text -----**<br>


- **0.1A-6A have 0.65±0.05 diameter lead.** 

**7A have 0.8±0.05 diameter lead.** 

## ~~**Packaging**~~ 

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Quantity &<br>Packaging Option Packaging Specification Quantity  Packaging Code Taping Width<br>235 Series<br>Bulk N/A 1000 MX N/A<br>Bulk N/A 1000 MXE N/A<br>Reel and Tape EIA 296-E 1000 MRET1 T1=53mm (2.087”)<br>Recommended Accessories<br>Accessory  Series Description Max Application  Max Application<br>Type Voltage Amperage<br>345_ISF Panel Mount Shock-Safe Fuseholder 20<br>Holder 345 Shock-Safe Fuseholder with PC Mount, Solder Mount and Panel Mount options 20<br>830 PC Mount Shock-Safe Miniature Fuseholder 16<br>520 Metric OMNI-BLOK® Fuse Block  10<br>Block 646 PC Mount Miniature Fuse Block  250 6.3<br>658 Surface Mount Miniature Fuse Block  10<br>520_W PC Mount Miniature Fuse Clip 6.3<br>Clip 111 PC Board Mount Fuse Clip 10<br>445 PC Board Mount Fuse Clip 10<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 factory for applications greater than the max voltage and amperage shown. 

**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. 

© 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BA.08/26/20

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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