# FUSE, SMD, 20A, 1206, FAST ACTING

![Product image](https://novapart.co/image/farnell:1757303/)

**URL**: https://novapart.co/products/0501020.WR./fuse-smd-20a-1206-fast-acting
**SKU**: 0501020.WR.
**Manufacturer**: LITTELFUSE
**Category**: Circuit Protection || Fuses & Fuse Accessories || Fuses || SMD Fuses
**Price**: €0.3630
**Stock**: 10+

## Specifications

| Parameter | Value |
|---|---|
| Fuse Current | 20A |
| Product Range | 501 Series |
| Fuse Case Style | 1206 (3216 Metric) |
| Voltage Rating Vdc | 32VDC |
| Blow Characteristic | Fast Acting |
| Breaking Capacity Current Dc | 150A |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:1757303/)

Ceramic Fuse > 501 Series 

~~**RoHS Pb** |[_JQUF][ cAMus] @;~~ 

## **Surface Mount Fuses** 

## 501 Series – High Current 1206 Fast-Ac ~~ting Fuse~~ 

## ~~**Description**~~ 

The 501 Series is a 100% Lead-free, RoHS compliant and Halogen-free fuse series designed specifically to provide over- current protection to circuits that operate under high working ambient temperature up to 150°C. 

The general design ensures excellent temperature stability and performance reliability. 

The high I[2] t values which is typical in the Littelfuse Ceramic Fuse family, ensure high inrush current withstand capability. 

## ~~**Features**~~ 

- Operating Temperature • 100% Lead-free, RoHS from -55ºC to +150ºC compliant and Halogenfree 

- Designed to provide over-current protection • Suitable for both leaded in high current voltage and lead-free reflow / regulator module (VRM) wave soldering applications 

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

|AGENCY|AGENCY FILE NUMBER|AMPERE RANGE|
|---|---|---|
|cWAX us|E10480|10A - 20A|
||29862|10A - 20A|



## ~~**Applications**~~ 

- Voltage Regulator • Notebook PC Module (VRM) • DC-DC Converter 

- Equipment 

- **Additional Information** Gi **Datasheet Resources Samples** 

|Equipment<br>• DC-DC Converter|• DC-DC Converter|
|---|---|
|~~**Electrical Characteristics for Series**~~||
|% of Ampere<br>Rating<br>Ampere Rating<br>Opening Time at 25ºC<br>100%<br>10A – 20A<br>4 Hours, Minimum<br>350%<br>10A – 20A<br>5 Seconds, Maximum<br>**Additional Information**<br>**Datasheet**<br>**Samples**<br>**Resources**<br>~~—_—————~~<br>Gi||
|~~**Electrical Specif**~~**i**~~**cations by Item**~~||
|Ampere<br>Rating<br>(A)<br>Amp<br>Code<br>Max. Voltage<br>Rating<br>(V)<br>Interrupting<br>Rating<br>(DC)1<br>Nominal<br>Resistance<br>(Ohms)2<br>Nominal<br>Melting I2T<br>(A2Sec.)3<br>Nominal Voltage<br>Drop At Rated<br>Current (V)4<br>Nominal Power<br>Dissipation At<br>Rated Current (W)<br>Agency Approvals<br>10<br>010.<br>32<br>150 A @ 32 VDC<br>0.00362<br>10.385<br>0.04407<br>0.4407<br>x<br>x<br>12<br>012.<br>32<br>0.00311<br>20.341<br>0.04927<br>0.5912<br>x<br>x<br>15<br>015.<br>32<br>0.00250<br>39.700<br>0.04843<br>0.7265<br>x<br>x<br>20<br>020.<br>32<br>0.00194<br>86.360<br>0.05888<br>1.1776<br>x<br>x<br>~~|~~<br>~~| |~~<br>~~a se~~<br>~~ee~~<br>~~|~~<br>|<br>~~ase~~<br>~~ee~~<br>~~| |~~<br>~~ase~~<br>~~|~~<br>~~a~~||



Notes: 

1. DC Interrupting Rating tested at rated voltage with time constant < 0.5 msec. 

2. Nominal Resistance measured with < 10% rated current. 

Devices designed to carry rated current for 4 hours minimum. It is recommended that devices be operated continuously at no more than 80% rated current. See “Temperature Re-rating Curve”for additional re-rating information. 

3. Nominal Melting I[2] t measured at 1 msec. opening time. For other I[2] t data refer to chart. 

4. Nominal Voltage Drop measured at rated current after temperature has stabilized and with fuse mounted on board with 3-oz Cu trace. 

Devices designed to be mounted with marking code facing up. 

© 2016 Littelfuse, Inc. Specifications are subject to change without notice.  Application testing is strongly recommendedSpecifications are subject to change without notice **.** Revised: 05/10/16 

**Surface Mount Fuses** Ceramic Fuse > 501 Series 

**==> picture [93 x 32] intentionally omitted <==**

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


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**----- Start of picture text -----**<br>
140<br>120<br>100<br>80<br>60<br>40<br>-65    -45      -25       -5       15       35      55       75       95      115    135    155<br>TEMPERATURE (°C)<br>PERCENT OF RATING<br>**----- End of picture text -----**<br>


Note: 

1. Re-rating depicted in this curve is in addition to the standard re-rating of 20% for continuous operation. 

Example: 

For continuous operation at 75 degrees celsius, the fuse should be rerated as follows: 

- I = (0.80)(0.85)IRAT = (0.68)IRAT 

## ~~**Average Time Current Curves**~~ 

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**----- Start of picture text -----**<br>
100.000<br>10.000<br>1.000<br>0.100<br>0.010<br>0.001<br>1 10 100 1000<br>CURRENT IN AMPERES<br>10A 12A 15A 20A<br>TIME IN SECONDS<br>**----- End of picture text -----**<br>


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**----- Start of picture text -----**<br>
|||||||||||
|---|---|---|---|---|---|---|---|---|---|
|Soldering Parameters|
|Reflow Condition|Pb – free assembly|t|P|
|T|P|
|Critical Zone|
|- Temperature Min (Ts(min))|150°C|Ramp-up|TL to TP|
|Pre Heat|- Time (Min to Max) (t- Temperature Max (Ts(max)s)|)|200°C60 – 180 seconds|T|S(max)|T|L|t|L|
|Average Ramp-up Rate (Liquidus Temp|3°C/second max.|Preheat|Ramp-down|
|(TL) to peak)|T|S(min)|
|TS(max) to TL - Ramp-up Rate|5°C/second max.|t|S|
|Reflow|- Temperature (TL) (Liquidus)|217°C|25|
|- Temperature (tL)|60 – 150 seconds|time to peak temperature|Time|
|(t 25ºC to peak)|
|Peak Temperature (TP)|260|[+0/-5]|°C|
|Time within 5°C of actual peak|
|10 – 30 seconds|
|Temperature (tp)|
|Ramp-down Rate|6°C/second max.|
|Time 25°C to peak Temperature (TP)|8 minutes max.|
|Do not exceed|260°C|
|Wave Soldering|260°C, 10 seconds max.|

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


© 2016 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 05/10/16 

**Surface Mount Fuses** Ceramic Fuse > 501 Series 

**==> picture [94 x 32] intentionally omitted <==**

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

**==> picture [245 x 136] intentionally omitted <==**

**----- Start of picture text -----**<br>
Body:  Advanced Ceramic<br>Materials Terminations:   Ag / Ni / Sn (100% Lead-free)<br>Element Cover Coating:  Lead-free Glass<br>Moisture<br>IPC/JEDEC J-STD-020, Level 1<br>Sensitivity Level<br>Solderability IPC/ECA/JEDEC J-STD-002, Condition B<br>Humidity Test MIL-STD-202, Method 103, Conditions D<br>Resistance to<br>MIL-STD-202, Method 210, Condition B<br>Solvents<br>**----- End of picture text -----**<br>


||**Moisture Resistance**|MIL-STD-202, Method 106|
|---|---|---|
||**Thermal Shock**|MIL-STD-202, Method 107,<br>Condition B|
||**Mechanical Shock**<br>**Vibration**|MIL-STD-202, Method 213,<br>Condition A<br>MIL-STD-202, Method 201|
||**Vibration,**|MIL-STD-202, Method 204,|
||**High Frequency**|Condition D|
||**Dissolution of**|IPC/ECA/JEDEC J-STD-002,|
||**Metallization**<br>**Terminal Strength**|Condition D<br>IEC 60127-4|



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Dimensions<br>**----- End of picture text -----**<br>


||~~**Part Marking System**~~||
|---|---|---|
||AmpCode<br>MarkingCode||
||010.<br>10||
||012.<br>12||
||015.<br>15<br>020.<br>20||
||||
||~~**Part Numbering System**~~||



**==> picture [184 x 236] intentionally omitted <==**

**----- Start of picture text -----**<br>
3.200 ± .1778<br>[.126 ± .007]<br>1.00 1.63 +.10/-.20<br>[.04] [.064 +.004/-.008]<br>20<br>0.835 ± 0.15<br>[.033 ± .006]<br>.520 ± .200<br>[.020 ± .008]<br>1.000 1.500<br>[.039] [.059]<br>1.800<br>[.071]<br>3.500<br>[.138]<br>**----- End of picture text -----**<br>


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**----- Start of picture text -----**<br>
0501 020. W R<br>Series<br>AMP Code<br>Quantity<br>W = 3000 pcs<br>Packing Code<br>R = Reel Pack<br>**----- End of picture text -----**<br>


||~~**Packaging**~~|||||
|---|---|---|---|---|---|
||Packaging Option|Packaging Specifcation|Quantity|Quantity &<br>Packaging Code||
||8mm Tape and Reel|EIA-481, IEC 60286, Part 3|3000|WR||



© 2016 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 05/10/16 



## Links

- [View this product on Novapart](https://novapart.co/products/0501020.WR./fuse-smd-20a-1206-fast-acting)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/en-ES/littelfuse/0501020-wr/fuse-smd-20a-1206-fast-acting/dp/1757303)
---

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