0239007.MXP

Fuse, Cartridge, Slow Blow, 7 A, 125 V, 5mm x 20mm, 0.2" x 0.79", Slo-Blo 239

⚠️ 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:7A; Voltage Rating VAC:125V; Fuse Size Metric:5mm x 20mm; Fuse Size Imperial:0.2" x 0.79"; Product Range:Slo-Blo 239 Series; Breaking Capac
SVHC: No SVHC (23-Jan-2024)
Fuse Current: 7A
Product Range: Slo-Blo 239
Fuse Size Metric: 5mm x 20mm
Fuse Size Imperial: 0.2" x 0.79"
Voltage Rating VAC: 125V
Blow Characteristic: Slow Blow
Breaking Capacity Current AC: 10kA

Delivery and price
Units per pack	1000
Price	0.451 €
Current stock	200+
Lead time	30 days

Datasheet

Axial Lead and Cartridge Fuses **Datasheet** 

**477 Series** 5×20 mm, Time-Lag Fuse 

## **RoHS Pb PSE** C1 ~~0~~ 

## **Description** 

400Vdc/500Vac rated, 5x20mm, time-lag, surge withstand ceramic body cartridge fuse. 

## **Features & Benefits** 

- Designed to International ■ Available in cartridge and axial (IEC) Standard for use lead form globally. ■ RoHS compliant and lead-free 

- ■ Follow the IEC 60127-2, Sheet 5 specification for time-lag fuses 

## **Additional Information** 

## **Applications** 

High energy and power efficient applications. 

## **Electrical Characteristics for Series** 

**==> picture [198 x 7] intentionally omitted <==**

**----- Start of picture text -----**<br>
Resources Accessories Samples<br>**----- End of picture text -----**<br>


## **Agency Approvals** 

|**Agency**<br>**PS**<br>**E**<br>Oo|**Agency File Number**<br>Cartridge:<br>NBK040609-JP1021A<br>NBK040609-JP1021C<br>NBK100408-JP1021A<br>Leaded:<br>NBK040609-JP1021B<br>NBK040609-JP1021D<br>NBK100408-JP1021B|**Ampere Range**<br>1A – 5A<br>6.3A – 12A<br>16A<br>1A – 5A<br>6.3A – 12A<br>16A|
|---|---|---|
|©|SE-S-2300622R|0.50A – 8A|
|WA~~us~~|E10480|0.50A - 16A|
|~~us~~|40025413|1A, 3.15A|
|A|J50248089|10A, 12A, 16A|
|C~~c~~|N/A|0.50A – 16A|
||N/A|0.50A - 16A|



|**% of Ampere**<br>**Rating**<br>150%|**Ampere Rating**<br>.5 - .8|**Opening Time**<br>60 minutes, Minimum|
|---|---|---|
||1 - 3.15|60 minutes, Minimum|
||4 - 6.3|60 minutes, Minimum|
||8 - 16|30 minutes, Minimum|
|210%|.5 - .8|30 minutes, Maximum|
||1 - 3.15|30 minutes, Maximum|
||4 - 6.3|30 minutes, Maximum|
||8 - 16|30 minutes, Maximum|
|275%|.5 - .8|.25 sec., Min.; 80 sec. Max.|
||1 - 3.15|.75 sec., Min.; 80 sec. Max.|
||4 - 6.3|.75 sec., Min.; 80 sec. Max.|
||8 - 16|.75 sec., Min.; 80 sec. Max.|
|400%|.5 - .8|.05 sec., Min.; 5 sec. Max.|
||1 - 3.15|.095 sec., Min.; 5 sec. Max.|
||4 - 6.3|.15 sec., Min.; 5 sec. Max.|
||8 - 16|.15 sec., Min.; 5 sec. Max.|
|1000%|.5 - .8|.005 sec., Min.; .15 sec. Max.|
||1 - 3.15|.01 sec., Min.; .15 sec. Max.|
||4 - 6.3|.01 sec., Min.; .15 sec. Max.|
||8 - 16|.01 sec., Min.; .15 sec. Max.|



© 2025 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 08/22/25 

**1** 

Axial Lead and Cartridge Fuses **Datasheet** 

**477 Series** 5×20 mm, Time-Lag Fuse 

## **Electrical Characteristic** 

|**Amp**<br>**Code**<br>.500|**Amp**<br>**Rating**<br>0.5|**Max Voltage**<br>**Rating (V)**<br>**AC**<br>**DC**|**Max Voltage**<br>**Rating (V)**<br>**AC**<br>**DC**|**Interrupting Rating**<br>100A@500VAC<br>1500A@400VDC|**Nominal Cold**<br>**Resistance**<br>**(Milli-ohms)**<br>1055.900|**Nominal**<br>**Melting**<br>**I2t (A2 sec.)†**<br>0.300|**Agency Approvals**|**Agency Approvals**|**Agency Approvals**|**Agency Approvals**|
|---|---|---|---|---|---|---|---|---|---|---|
||||||||x<br>Cc|x<br>acm|**PS**<br>**E**<br>-<br>x*<br>©<br>Was|x**<br>-<br>-<br>OQ<br>A|
|||**AC**<br>500|**DC**<br>400||||||||
|.800|0.8|500|400||430.000|0.909|x|x|-<br>x*|x**<br>-<br>-|
|001.|1|500|400||139.400|1.800|x|x|x<br>x*|x**<br>-<br>x|
|002.|2|500|400||55.200|9.120|x|x|x<br>x*|x**<br>-<br>-|
|3.15|3.15|500|400||27.700|50.109|x|x|x<br>x*|x**<br>-<br>x|
|004.|4|500|400|100A@500VAC<br>500A@400VDC|17.200|52.480|x|x|x<br>x*|x**<br>-<br>-|
|005.|5|500|400||13.700|76.500|x|x|x<br>x*|x**<br>-<br>-|
|06.3|6.3|500|400||10.970|121.451|x|x|x<br>x|x**<br>-<br>-|
|008.|8|500|400||8.305|203.520|x|x|x<br>x|x**<br>-<br>-|
|010.|10|500|400||4.950|509.000|x|x|x<br>x|-<br>x<br>-|
|012.|12|500|400||4.730|576.000|x|x|x<br>x|-<br>x<br>-|
|016.|16|500|400|100A@500VAC<br>400A@400VDC|3.100|1331.200|x|x|x<br>x|-<br>x***<br>-|



**Notes:** 

*100A @ 600Vac also available. Add suffix "MXE6P". Example: 0477004.MXE6P. 

**Semko approval for 100A@500Vac and 200A@400Vdc. 

***100A@ 500Vac and 300A@400Vdc for 16A †I2t test at 10x rated current. 

## **Temperature Re-rating Curve** 

## **Average Time Current Curves** 

**==> picture [62 x 10] intentionally omitted <==**

**----- Start of picture text -----**<br>
0.500A 0.800A 1A 2A 3.15A 4A 5A 6.3A 8A 10A 12A 16A<br>**----- End of picture text -----**<br>


© 2025 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 08/22/25 

**2** 

Axial Lead and Cartridge Fuses **Datasheet** 

**477 Series** 5×20 mm, Time-Lag Fuse 

## **Soldering Parameters - Wave Soldering** 

**==> picture [212 x 148] 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<br>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: 

|**Wave Parameter**<br>Preheat:<br>(Depends on Flux Activation Temperature)|**Lead-Free Recommendation**<br>(Typical IndustryRecommendation)|
|---|---|
|Temperature Minimum:|100°C|
|Temperature Maximum:|150°C|
|Preheat Time:|60-180 seconds|
|Solder Pot Temperature:|260°C Maximum|
|Solder Dwell Time:|2-5 seconds|



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:** Ceramic **Materials Cap:** Nickel–plated Brass **Leads:** Tin–plated Copper **Terminal Strength** MIL-STD-202, Method 211, Test Condition A **Solderability** MIL-STD-202 Method 208 **Cap 1:** Brand logo, current and voltage ratings **Product Marking Cap 2:** Series and agency approval markings **Packaging** Available in Bulk (M=1000 pcs/pkg) 

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



## **Dimensions** 

## **Part Numbering System** 

## **0477 xxxx M X E P** 

**==> picture [165 x 145] intentionally omitted <==**

**----- Start of picture text -----**<br>
0477000XP<br>0477.500XEP<br>to 40±1.0 21.5±1.0 5.6±0.4<br>0477.800XEP<br>7 - > 4<br>mane 0.65±0.05* [pS<br>0477001.XEP<br>to 40±1.0 21.5±1.0 5.5±0.3<br>0477016.XEP<br>se a<br>0.65±0.05*<br>All dimensions in mm<br>Notes:<br>* Ratings above 5A 1.0±0.05 diameter lead.<br>**----- End of picture text -----**<br>


**==> picture [100 x 139] intentionally omitted <==**

**----- Start of picture text -----**<br>
Series<br>Amp Code<br>Refer to Amp Code Column of<br>Electral Characteristics Table<br>Quantity Code<br>M = 1000<br>Packing Code<br>X = Filler<br>Option Code<br>E: Axial Lead<br>Others: Special Options<br>   Please Call Littelfuse for detail.<br>Lead-Free<br>**----- End of picture text -----**<br>


## **Packaging** 

|**Packaging Option**|**Packaging Specification**|**Quantity**|**Quantity &**<br>**Packaging Code**|**Reel Size**|
|---|---|---|---|---|
|||**477 Series**|||
|Bulk|N/A|1000|MX|N/A|
|Bulk|N/A|1000|MXE|N/A|
|Reel and Tape|N/A|1000|MRET1|T1=53mm(2.087”)|



**Disclaimer Notice -** Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation.  Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation.  Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation.  The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. 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. 

© 2025 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 08/22/25 

**3**

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.

About Novapart

Novapart is a B2B electronic component broker specialising in stock shortages and cost reduction. We source hard-to-find parts and identify compliant alternatives across a catalogue of 540,000+ components from 500+ manufacturers.

Learn more →

Stock Shortage Specialist

When a component is unavailable, discontinued or has an unacceptable lead time, we tap into our network of vetted European and Asian distributors to source what you need — without compromising on quality or traceability.

Request a quote →

Compliant Alternatives

We identify pin-to-pin, electrically equivalent substitutes that meet the same certifications (RoHS, AEC-Q100, REACH) as your original specification — validated against datasheets, not just part numbers. Often at a lower cost.

BOM Analysis service →