# Fuse, Surface Mount, 12 A, Slow Blow, 48 V, 1206 [3216 Metric], JB12S Series

![Product image](https://novapart.co/image/farnell:4420148RL/)

**URL**: https://novapart.co/products/JB12S1202R/fuse-surface-mount-12-a-slow-blow-48-v-1206-3216
**SKU**: JB12S1202R
**Manufacturer**: YAGEO
**Category**: Circuit Protection || Fuses & Fuse Accessories || Fuses || SMD Fuses
**Price**: €0.0480
**Stock**: 1000+
**Lead Time**: 239 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Fuse Current | 12A |
| Product Range | JB12S Series |
| Fuse Case Style | 1206 [3216 Metric] |
| Voltage Rating Vac | - |
| Voltage Rating Vdc | 48V |
| Blow Characteristic | Slow Blow |
| Breaking Capacity Current Ac | - |
| Breaking Capacity Current Dc | 200A |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4420148RL/)

DATA SHEET SMD 1206 SLOW BLOW FUSE **JB12S Series** 

**RoHS compliant & Halogen free** 

Circuit Protection 

> Product Specification 2 10 

SMD 1206 Slow Blow Fuse 

**JB12S Series** 

## **REVISED RECORD SHEET** 

|**REV.#**|**PAGES**|**REV.DATE**|**REVICED CONTENT**|
|---|---|---|---|
|A0|1-8|2022-09-05|Initial version|
|A1|P3;P10|2023-06-21|P10.add disclaimer.P3.revised typical DCR&I2t .|
|A2|P3|2023-08-01|Add rated current 0.5A Spec.|
|A3|P3|2026-1-14|P3. Add S dimension|
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www.yageo.com 

Jan. 20, 2026 V.3 

Circuit Protection 

Product Specification 

3 10 

SMD 1206 Slow Blow Fuse 

**JB12S Series** 

## **JB12S Series DataSheet** 

## **Scope** 

This specification is applicable to over-current protection thick film fuse for 1206 slow blow series produced by YAGEO corporation. 

## **Applications                                   Dimensions** 

- LCD Displays 

- Battery Packs 

- Hard Disk Drives 

|Series|L<br>(mm)|W<br>(mm)|T<br>(mm)|d<br>(mm)|S<br>(mm)|
|---|---|---|---|---|---|
|JB12S|3.20±0.20|1.60±0.20|0.65±0.20|0.50±0.20|0.75±0.20|



## **Features** 

- ●Small Size,1206 SMD 

- Operating temperature -55 ℃ to 125 ℃ 

- Excellent long-term stability 

- Halogen Free 

- Lead Free 

|Part Number<br>~~ee~~<br>~~ee~~|Current<br>Rating<br>(A)<br>~~ee~~<br>|Voltage<br>Rating<br>(Vdc)|Interrupting|Typical DCR<br>( mΩ )1<br>~~ee~~|Typical I2t<br>( A2s)2<br>~~ee~~<br>~~ee~~|Marking<br>~~ee~~<br>~~ee~~|
|---|---|---|---|---|---|---|
|JB12S5000R<br>~~ee~~<br>~~ee~~<br>~~ee~~|0.5A<br>~~ee~~<br>~~eee~~<br>|63Vdc<br>|50A@63Vdc<br>|1150<br>~~ee~~<br>~~ee~~|0.03<br>~~ee~~<br>~~ee~~<br>~~ee~~|0.5<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|JB12S6300R<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|0.63A<br>~~ee~~<br>~~eee~~<br>~~ee~~<br>|||1080<br>~~ee~~<br>~~ee~~<br>~~ee ee~~|0.035<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|B<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|JB12S7500R<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|0.75A<br> ~~eee~~<br>~~ee~~<br>~~ee~~<br>|||850<br>~~ee~~<br>~~ee ee~~<br>~~ee ee~~|0.078<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|.75<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|JB12S1001R<br> <br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|1.0A<br> ~~eee~~<br> ~~ee~~<br>~~ee~~<br>~~**ee**~~|||480<br>~~ee~~<br>~~ee ee~~<br>~~ee ee~~<br>~~**e**e e~~|0.13<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~e~~~~**e**~~|H<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|JB12S1501R<br> <br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|1.5A<br> ~~ee~~<br> ~~ee~~<br>~~**ee**~~|||230<br>~~ee ee~~<br>~~ee ee~~<br>~~**e**e e~~|0.32<br>~~ee ~~<br>~~ee~~<br>~~e~~~~**e**~~<br>~~**e**e~~|K<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|
|JB12S2001R<br> <br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.0A<br> ~~ee~~<br> ~~**ee**~~<br>~~ee~~<br>|||135<br>~~ee ee~~<br>~~**e**e e~~<br>~~e~~|0.64<br>~~ee ~~<br>~~e~~~~**e**~~<br>~~**e**e~~<br>~~eee~~|N<br> ~~ee~~<br>~~ee~~<br>~~ee~~|
|JB12S2501R<br> <br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.5A<br> ~~**ee**~~<br>~~ee~~<br>~~ee~~|||75<br>~~**e**e e~~<br>~~e~~<br>~~ee~~|1.28<br>~~e~~~~**e** ~~<br>~~**e**e~~<br>~~eee~~<br>~~ee~~|O<br> ~~ee~~<br>~~ee~~<br>~~ee~~|
|JB12S3001R<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|3.0A<br>~~ee~~<br>~~ee~~|||47<br>~~e~~<br>~~ee~~<br>~~ee~~|1.85<br>~~**e**e~~<br>~~eee~~<br>~~ee~~<br>~~ee~~|P<br>~~ee~~<br>~~ee~~|
|JB12S3501R<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|3.5A<br> ~~ee~~|||38<br><br>~~ee~~<br>~~ee~~<br>~~ee~~|2.23<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|R<br>~~ee~~|
|JB12S4001R<br> <br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|4.0A<br> ~~ee~~|||34<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.88<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|S<br>~~ee~~|
|JB12S5001R<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|5.0A|||24<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~es ee~~|5.16<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|T|
|JB12S6001R<br>~~ee~~<br>~~ee~~<br>~~ee~~|6.0A|||16<br>~~ee ~~<br>~~ee~~<br>~~es ee~~|6.03<br> ~~ee~~<br>~~ee~~<br>~~ee~~|F|
|JB12S7001R<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|7.0A<br>~~eee~~|||12.3<br>~~ee ~~<br>~~es ee~~<br>~~**ee**~~|7.24<br> ~~ee~~<br>~~ee~~<br>~~**ee**~~<br>~~**e**e~~|7<br>~~**ee**~~|
|JB12S8001R<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>eoeO0-|8.0A<br>~~eee~~<br>~~ee~~<br>eoeO0-|||8.3<br>~~es ee~~<br>~~**ee**~~<br>~~e~~<br>|10.05<br>~~ee~~<br>~~**ee**~~<br>~~**e**e~~<br>~~eee~~<br>|M<br>~~**ee**~~<br>|
|JB12S1002R<br>~~ee ~~<br>~~ee~~<br>eoeO0-|10A<br> ~~eee~~<br>~~ee~~<br>eoeO0-|||6.5<br>~~**ee**~~<br>~~e~~<br>|18.20<br>~~**ee**~~<br>~~**e**e~~<br>~~eee~~<br>|U<br>~~**ee**~~<br>|



www.yageo.com 

Jan. 20, 2026 V.3 

Circuit Protection 

> Product Specification 4 10 

SMD 1206 Slow Blow Fuse 

## **JB12S Series** 

|JB12S1202R|12A|48Vdc|200A@48Vdc|5|26.09|12|
|---|---|---|---|---|---|---|
|JB12S1502R|15A|||3.7|30.56|15|
|JB12S2002R|20A|||3.4|45.73|20|
|JB12S2502R|25A|||1.6|69.31|25|
|JB12S3002R|30A|||1.3|92|30|
|JB12S4002R|40A|36Vdc|200A@36Vdc|0.85|148|XL|



NOTE:1. Measured at≤10% rated current and 25 ℃ 

2. Nominal Melting I2t measured at 0.001s opening time 

## **Clearing Time Characteristics** 

|Rated Current|% of Current Rating|ClearingTime at 25℃|ClearingTime at 25℃|
|---|---|---|---|
|||Min|Max|
|0.5A-40A|100%|4hours|/|
||200%|1s|120s|
||350%|/|3s|



## **Part Number Code Rule** 

**J              B           12            S            1001            R** 

|Product Code|Product Type|Size Type|Fusing Type|Current Rating|Package|
|---|---|---|---|---|---|
|J:Fuse|B: Thick Film|12:1206|S: Slow Blow|6300:0.63A<br>1001:1A|R:Tape and Reel<br>B:Bulk|



## **Temperature Derating Curve** 

www.yageo.com 

Jan. 20, 2026 V.3 

> Product Specification 5 ~~—]~~ 10 

Circuit Protection 

SMD 1206 Slow Blow Fuse 

**JB12S Series** 

**==> picture [46 x 25] intentionally omitted <==**

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


## **Time & Current Curve** 

## **I[2] t & Time Curve** 

www.yageo.com 

Jan. 20, 2026 V.3 

Circuit Protection 

> Product Specification 6 10 

SMD 1206 Slow Blow Fuse 

**JB12S Series** 

## **Reliability Test Performance** 

|Item|Test condition/ Methods|Performance|Standard|
|---|---|---|---|
|Time/Current<br>Characteristics|100% Rated Current|No fusing within 4hr|UL248-14|
||200% Rated Current|0.63A - 40A：Min :1s ; Max : 120s|Refer to clearing<br>time characteristics|
||350% Rated Current|0.63A-40A：Max:3s||
|Breaking Capacity|0.63A-10A: 50A@63Vdc<br>12A-30A: 200A@48Vdc<br>40A:200A@36Vdc|No a permanent arcing,<br>ignition, bursting|UL248-14|
|Solderability|T=245℃±5℃，t=5s±0.5s|Cover≧95%|MIL-STD-202<br>Method 208|
|Resistance to<br>Soldering|Pre−heating:145°±15℃, max.120s<br>Peak: 260°C, max.10s<br>Reflow cycle: 2 times<br>After immersion into solder, leaving<br>the room temp.<br>for 1h or more, and then measure<br>the internal resistance.|△R<15%<br>No crack and damage,<br>Marking is easily legible|MIL-STD-202,<br>Method 210F|
|Thermal Shock|-65℃,15min→25℃,5min→<br>+125℃,15min ;<br>100 cycles|△R<10%<br>No crack and damage,|MIL-STD-202,<br>Method 213B|
|Mechanical Shock|a=100G for 11ms, 5pulses|△R<10%<br>No crack and damage|MIL-STD-202,<br>Method 213B|
|Vibration|Frequency range:10~15~10Hz/min<br>Vibration amplitude:1.5mm|△R<10%<br>No mechanical damages|MIL-STD-202,<br>Method 201A|
|Salt Spray|5% salt solution,48hr|△R<10%<br>Legible appearance|MIL-STD-202,<br>Method 101|
|Board Flex|Bending:1mm, time:60s|△R<15%<br>No mechanical damages|IEC 60127-4|



www.yageo.com 

Jan. 20, 2026 V.3 

YAGEO Circuit Protection SMD 1206 Slow Blow Fuse 

> Product Specification 7 10 

**JB12S Series** 

## **Soldering Condition** 

**==> picture [288 x 593] intentionally omitted <==**

**----- Start of picture text -----**<br>
Recommend Re-Flowing Profile<br>==<br>08as<br>a. «a<br>Si i. 50<br>crccrcrccrccccii pre ee mo amp up<br>A“y aa ramp down<br>ff we ramp up rate < 3 Kis<br>pical ss “<br>___<br>Preheating ————»|<br>50 100 150 200<br>Item  Condition<br>Ramp <3ºC/sec.<br>Pre-heating 145±15ºC, 120s max.<br>Time above220ºC  60s max.<br>Peak temperature  260ºC/10s max.<br>Recommend Soldering tip Temperature<br>Max: 3s<br>’ I<br>|----------------------<br>Soldering<br>Power =<br>Dia. of<br>Te°C |-------- lron= 1.0mm<br>Item  Condition<br>Iron soldering power  Max. 30W<br>Pre-heating time  60sec, 150ºC<br>Soldering tip temperature  Max. 350ºC<br>Soldering time  Max. 3sec<br>**----- End of picture text -----**<br>


Note: Take care not to apply the tip of the soldering iron to the terminal electrodes. 

www.yageo.com 

Jan. 20, 2026 V.3 

YAGEO Circuit Protection SMD 1206 Slow Blow Fuse 

Product Specification 

8 10 

**JB12S Series** 

## **Packaging Specification** 

■ Quantity & Weight 

|Series|Quantity|
|---|---|
|JB12S|3000pcs/Reel|



■ Reel & Tape Specification 

|Series|A<br>(mm)|B<br>(mm)|C<br>(mm)|D<br>(mm)|N<br>(mm)|W1<br>(mm)|W2<br>(mm)|
|---|---|---|---|---|---|---|---|
|JB12S|178±5|1.6 Min.|12.8 Min.|20.8 Min.|58±2|8.4 Min.|12.4 Max.|



|Series|A0<br>(mm)|B0<br>(mm)|D0<br>(mm)|D1<br>(mm)|E2<br>(mm)|E2<br>(mm)|F<br>(mm)|F<br>(mm)|K0<br>(mm)|K0<br>(mm)|
|---|---|---|---|---|---|---|---|---|---|---|
|JB12S|1.92±0.10|3.62±0.10|1.50+0.1|1.00 min.|1.75±0.10||3.50±0.05||0.87±0.10||
||P0<br>(mm)|P1<br>(mm)|P2<br>(mm)|T<br>(mm)||W<br>(mm)||θ<br>~~(mm)~~|||
||(mm)<br>4.00±0.10|(mm)<br>4.00±0.10|(mm)<br>2.00±0.05|(mm)<br>0.25±0.05||(mm)<br>8.00±0.30||~~(mm)~~<br>60max.|||



www.yageo.com 

Jan. 20, 2026 V.3 

~~YAGEO~~ Circuit Protection SMD 1206 Slow Blow Fuse 

> Product Specification 9 ~~—]~~ 10 

**JB12S Series** 

## ■ Peeling Strength of Seal Tape 

The top cover tape is pulled at a speed of 300 mm/min with the angle between the tape during peel and the direction of unreeling maintained at 165 to 180 degree as following picture. The peel force of paper carrier tape shall be 0.1N to 0.7N(10 to 70 g) 

## **Storage Conditions** 

- Storage Temperature: 10ºC~+40ºC 

- Relative Humidity: ≤75%RH 

- Keep away from corrosive atmosphere and sunlight. 

- Period of Storage: 2 year. 

www.yageo.com 

Jan. 20, 2026 V.3 

Circuit Protection 

> Product Specification 10 10 

SMD 1206 Slow Blow Fuse 

**JB12S Series** 

## LEGAL DISCLAIMER 

YAGEO, its distributors and agents (collectively, “YAGEO”), hereby disclaims any and all liabilities for any errors, inaccuracies or incompleteness contained in any product related information, including but not limited to product specifications, datasheets, pictures and/or graphics. YAGEO may make changes, modifications and/or improvements to product related information at any time and without notice. 

YAGEO makes no representation, warranty, and/or guarantee about the fitness of its products for any particular purpose or the continuing production of any of its products. To the maximum extent permitted by law, YAGEO disclaims (i) any and all liability arising out of the application or use of any YAGEO product, (ii) any and all liability, including without limitation special, consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for a particular purpose, non -infringement and merchantability. 

YAGEO products are designed for general purpose applications under normal operation and usage conditions. Please contact YAGEO for the applications listed below which require especially high reliability for the prevention of defects which might directly cause damage to the third party's life, body or property: Aerospace equipment (artificial satellite, rocket, etc.), Atomic energy-related equipment, Aviation equipment, Disaster prevention equipment, crime prevention equipment, Electric heating apparatus, burning equipment, Highly public information network equipment, data-processing equipment , Medical devices, Military equipment, Power generation control equipment, Safety equipment, Traffic signal equipment, Transportation equipment and Undersea equipment, or for any other application or use in which the failure of YAGEO products could result in personal injury or death, or serious property damage. Particularly **YAGEO Corporation and its affiliates do not recommend the use of commercial, automotive, and/or COTS grade products for high reliability applications or manned space flight.** 

Information provided here is intended to indicate product specifications only. YAGEO reserves all the rights for revising this content without further notification, as long as products are unchanged. Any product change will be announced by PCN. 

www.yageo.com 

Jan. 20, 2026 V.3 



## Links

- [View this product on Novapart](https://novapart.co/products/JB12S1202R/fuse-surface-mount-12-a-slow-blow-48-v-1206-3216)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/yageo/jb12s1202r/smd-fuse-slow-blow-12a-48vdc/dp/4420148RL)
---

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