# SMD FUSE, FAST ACTING, 2.5A, 63VDC

![Product image](https://novapart.co/image/farnell:4729462/)

**URL**: https://novapart.co/products/043702.5WR/smd-fuse-fast-acting-25a-63vdc
**SKU**: 043702.5WR
**Manufacturer**: LITTELFUSE
**Category**: Circuit Protection || Fuses & Fuse Accessories || Fuses || SMD Fuses
**Price**: €0.8420
**Stock**: 10+
**Lead Time**: 97 days (indicative)

## Description

Fuse Current:2.5A; Blow Characteristic:Fast Acting; Voltage Rating VAC:45V; Voltage Rating VDC:63V; Fuse Case Style:1206 ^3216 Metric]; Product Range:437 Series; Br 27AM6675

## Specifications

| Parameter | Value |
|---|---|
| Svhc | To Be Advised |
| Fuse Current | 2.5A |
| Product Range | 437 Series |
| Fuse Case Style | 1206 [3216 Metric] |
| Voltage Rating Vac | 45V |
| Voltage Rating Vdc | 63V |
| Blow Characteristic | Fast Acting |
| Breaking Capacity Current Ac | 50A |
| Breaking Capacity Current Dc | 50A |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4729462/)

Surface Mount Fuses **Datasheet** 

**437 Series** 1206 Fast-Acting Fuse 

## UK ACEL_IQHF-Wdus **RoHS Pb** &, 

## **Description** 

This 100% Lead-free, RoHS compliant and Halogen-free fuse series has been designed specifically to provide over current protection to circuits might encounter high working ambient temperatures (up to 150ºC). The general design ensures excellent temperature stability and performance reliability. In addition to this, the high I²t values typical of the Littelfuse Ceramic Fuse family ensure high inrush current withstand capability. 

## **Features & Benefits** 

- Operating Temperature from ■ Conforms to EN60127-1 and -55ºC to +150ºC EN60127-7 (0.5A-8A only) 

- 100% Lead-free, Halogen-Free ■ CE Mark indicates suitability and RoHS compliant for European Market 

- Suitable for both leaded ■ UKCA Mark indicates suitability and lead-free reflow / wave for the UK Market soldering 

## **Web Resources** 

Download ECAD models, order samples, and find technical recources at www.littelfuse.com 

- UL Recognized to UL/CSA/ NMX 248-1 and UL/CSA/NMX 248-14 

## **Applications** 

- LCD Displays ■ Scanners 

- Servers ■ Data Modems 

■ Printers 

## **Electrical Characteristics** 

|**% of Ampere**<br>**Rating**<br>100%|**Ampere Rating**<br>250mA - 8A|**Opening Time at 25ºC**<br>4 hours, Minimum|
|---|---|---|
|250%|750mA - 8A|5 seconds, Maximum|
|350%|250mA -500mA|5 seconds, Maximum|
|350%|750mA - 8A|1 second, Maximum|



## **Agency Approvals** 

|**Agency**<br>~~coAdus~~|**Agency File/Certificate Number**<br>E10480|**Ampere Range**<br>0.250A - 8A|
|---|---|---|
|~~coAd us~~<br>G.|29862|0.250A - 8A|
|G|N/A|0.5A - 8A|
|~~a~~|J50519871|0.5A - 8A|
|~~a~~|N/A|0.5A - 8A|



## **Electrical Specifications** 

|**Ampere**<br>**Rating**<br>**(A)**<br>0.25|**Ampere**<br>**Amp**<br>**Code**<br>.250|**Max.**<br>**Voltage**<br>**Rating**<br>**(V)**<br>125|**Voltage**<br>**Interrupting Rating1**<br>50 A @ 125 V AC/DC|**Nominal**<br>**Resistance**<br>**(Ohms)2**<br>2.29|**Nominal Melting**<br>**I2t (A2Sec.)3**<br>0.003|**Nominal**<br>**Voltage Drop**<br>**At Rated**<br>**Current (V)4**<br>0.78|**Nominal Power**<br>**Dissipation At**<br>**Rated Current**<br>**(W)**<br>0.195|**Nominal Power**<br>**Agency Approvals**|**Nominal Power**<br>**Agency Approvals**|**Nominal Power**<br>**Agency Approvals**|**Nominal Power**<br>**Agency Approvals**|**Nominal Power**<br>**Agency Approvals**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|||||||||x<br>MW:|x<br> G|-<br>CE|-<br> A|-<br>Yk|
|0.375|.375|125||1.33|0.01|0.6|0.225|x|x|-|-|-|
|0.5|.500|63|50 A @ 63 V AC/DC|0.908|0.018|0.52|0.26|x|x|x|x|x|
|0.75|.750|63||0.665|0.080|0.45|0.338|x|x|x|x|x|
|1.0|001.|63||0.42|0.106|0.41|0.41|x|x|x|x|x|
|1.25|1.25|63||0.318|0.257|0.4|0.5|x|x|x|x|x|
|1.5|01.5|63||0.209|0.398|0.39|0.585|x|x|x|x|x|
|1.75|1.75|63||0.071|0.084|0.27|0.473|x|x|x|x|x|
|2.0|002.|63||0.058|0.225|0.2|0.4|x|x|x|x|x|
|2.5|02.5|63|50A @ 45V AC/63V DC<br>50A @ 32V AC/35V DC<br>50A @ 32V DC|0.043|0.441|0.15|0.375|x|x|x|x|x|
|3.0|003.|63||0.033|0.506|0.14|0.42|x|x|x|x|x|
|3.5|03.5|63||0.027|0.777|0.13|0.455|x|x|x|x|x|
|4.0|004.|63||0.022|1.024|0.13|0.52|x|x|x|x|x|
|5.0|005.|63||0.0159|2.3|0.13|0.65|x|x|x|x|x|
|7.0|007.|35|50A @ 32V AC/35V DC<br>50A @ 32V DC|0.01|5.02|0.13|0.91|x|x|x|x|x|
|8.0|008.|35||0.0093|7.23|0.13|1.04|x|x|x|x|x|



## **Notes:** 

**1.** AC Interrupting Rating tested at rated voltage with unity power factor. DC Interrupting Rating tested at rated voltage with time constant < 0.8 msec. 

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

**3.** Contact Littelfuse if application transient surges are less than 1 ms. 

**4.** Nominal Voltage Drop measured at rated current after temperature has stabilized. 

- 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. Devices designed to be mounted with marking code facing up. 

- 2.5A-5A, (50A @ 45V AC/63V DC- For cURus only, 50 A @ 32 V DC-for CSA only, 50A @ 32 V AC both cURus and CSA 

© 2024 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 10/29/24 

**1** 

**==> picture [505 x 757] intentionally omitted <==**

**----- Start of picture text -----**<br>
Surface Mount Fuses  Datasheet<br>437 Series<br>1206 Fast-Acting Fuse<br>Temperature Re-rating Curve Average Time Current Curves<br>140<br>10<br>120<br>100<br>1<br>80<br>60<br>0.1<br>40<br>-65         -45        -25         -5           15          35          55          75         95         115        135       155<br>Temperature (°C)<br>0.01<br>Note:<br>1.  Re-rating depicted in this curve is in addition to the standard re-rating of 20% for continuous operation.<br>Example:<br>For continuous operation at 75 degrees celsius, the fuse should be rerated as follows:<br>I = (0.80)(0.85)IRAT = (0.68)IRAT<br>0.001<br>0.1 1 10 100<br>Current In Amperes<br>Soldering Parameters<br>Reflow Condition Pb – free assembly<br>- Temperature Min (Ts(min)) 150°C  t P<br>T P<br>Pre Heat - Temperature Max (Ts(max)) 200°C Ramp-up Critical ZoneTL to TP<br>Average Ramp-up Rate (Liquidus Temp (Tpeak) - Time (Min to Max) (ts) L) to  60 – 180 seconds3°C/second max. T S(max) T L t L<br>TS(max) to TL - Ramp-up Rate 5°C/second max. Ramp-down<br>Reflow - Temperature (T- Temperature (tLL)) (Liquidus) 217°C 60 – 150 seconds T S(min) tPreheat S<br>Peak Temperature (TP) 260 [+0/-5]  °C<br>Time within 5°C of actual peak Temperature (tp) 10 – 30 seconds 25<br>Ramp-down Rate 6°C/second max. time to peak temperature(t 25ºC to peak) Time<br>Time 25°C to peak Temperature (TP) 8 minutes max.<br>Do not exceed 260°C<br>Wave Soldering 260°C, 10 seconds max.<br>© 2024 Littelfuse, Inc.<br>2 Specifications are subject to change without notice.<br>Revised: GD. 10/29/24<br>a<br>.250A .375A .500A .750A 1A 1.25A  1.5A 1.75A 2A 2.5A 3A3.5A 4A 5A 7A 8A<br>Percent Of Rating<br>Time In Seconds<br>Temperature<br>**----- End of picture text -----**<br>


Surface Mount Fuses **Datasheet** 

**437 Series** 1206 Fast-Acting Fuse ee 

## **Product Characteristics** 

**Body:** Advanced Ceramic **Terminations:** Ag / Ni / Sn (100% Lead-free) **Materials Element Cover Coating:** Ceramic/Lead-free Glass 

**Moisture Sensitivity Level** IPC/JEDEC J-STD-020, Level 1 **Solderability** IPC/EIC/JEDEC J-STD-002, Condition B **Humidity Test** MIL-STD-202, Method 103, Condition D **Resistance to Solder Heat** MIL-STD-202, Method 210, Condition B **Moisture Resistance** MIL-STD-202, Method 106 

**Thermal Shock Mechanical Shock Vibration Vibration, High Frequency Dissolution of Metallization Terminal Strength** 

MIL-STD-202, Method 107, Condition B MIL-STD-202, Method 213, Condition A MIL-STD-202, Method 201 MIL-STD-202, Method 204, Condition D IPC/EIC/JEDEC J-STD-002, Condition D IEC 60127-4 

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Dimensions mm (inches) Part Marking System<br>[0.126 ± 0.007]3.200 ± 0.1778 Amp Code Marking Code Amp Code Marking Code<br>0.25 D 2.0 N<br>fr<br>0.375 E 2.5 O<br>0.5 F 3.0 P<br>1.63 +0.10 / -0.2 0.75 G 3.5 R<br>[0.064 +0.004 / -0.008]<br>1.0 H 4.0 S<br>N<br>1.25 J 5.0 T<br>izic, i<br>1.5 K 7.0 W<br>1.75 L 8.0 X<br>0.835 ± 0.15<br>[0.0329 ± 0.006]<br>Part Numbering System<br>0.520 ± 0.200<br>[0.020 ± 0.008] af 0437    008.   W    R<br>[0.039]1.000 [0.059]1.500 Series<br>Packaging Code<br>oe AMP Code TTT. R = Reel Pack<br>1.800<br>[0.071]<br>Quantity Code<br>W = 3000 pcs<br>ft 3.500 ; -L<br>[0.138]<br>Packaging<br>Packaging Option SpecificationPackaging  Quantity [Quantity & Packaging ] Code<br>8mm Tape<br>EIA-481, IEC 60286-3 3000 WR<br>& Reel<br>**----- End of picture text -----**<br>


**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. © 2024 Littelfuse, Inc. **3** Specifications are subject to change without notice. Pdliteluss ~~|~~ 28 ~~=~~ Revised: GD. 10/29/24 



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