MSS1278-142MLD

Power Inductor (SMD), 1.4 µH, 10 A, Shielded, 25.2 A, MSS1278 Series

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Manufacturer: COILCRAFT
Product type: SMD Power Inductors
Inductance:1.4µH; RMS Current (Irms):10A; Inductor Construction:Shielded; Saturation Current (Isat):25.2A; Product Range:MSS1278 Series; Power Inductor Case:12.3mm x 12.3mm x 8.05mm
SVHC: No SVHC (25-Jun-2025)
Inductance: 1.4µH
Product Range: MSS1278 Series
Product Width: 12.3mm
Product Height: 8.05mm
Product Length: 12.3mm
DC Resistance Max: 9800µohm
RMS Current (Irms): 10A
Power Inductor Case: 12.3mm x 12.3mm x 8.05mm
Inductance Tolerance: ± 20%
Inductor Construction: Shielded
Saturation Current (Isat): 25.2A

Delivery and price
Units per pack	500
Price	1.19 €
Current stock	10+
Lead time	30 days

Datasheet

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Document 322-1 

AEC Q200 +85°C 

## **– SMT Power Inductors MSS1278** 

• 12.3 × 12.3 mm footprint; 8 mm high shielded inductors • Low DCR and excellent current handling 

**Designer’s Kit C380** contains 3 each of all values. **Core material** Ferrite 

**Core and winding loss** See www.coilcraft.com/coreloss **Terminations** RoHS compliant matte tin over nickel over phos bronze. Other terminations available at additional cost. **Weight:** 3.8 – 4.6 g 

**Ambient temperature** –40°C to +85°C with (40°C rise) I rms current. **Maximum part temperature** +125°C (ambient + temp rise). Derating. **Storage temperature** Component: –40°C to +125°C. Tape and reel packaging: –40°C to +80°C 

**Resistance to soldering heat** Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles **Moisture Sensitivity Level (MSL)** 1 (unlimited floor life at <30°C / 85% relative humidity) 

**Packaging** 500/13″ reel; Plastic tape: 24 mm wide, 0.5 mm thick, 16 mm pocket spacing, 8.7 mm pocket depth 

**PCB washing** Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. See Doc787_PCB_Washing.pdf. 

## 1. Please specify **termination** and **packaging** codes: 

|**Part number**1<br>MSS1278-142ML_    1.4 ±20%<br>MSS1278-472ML_    4.7 ±20%|**DCR**3<br> **Inductance**2  **(mOhms) **<br>**(µH)**<br>**typ**<br>**max**<br>MSS1278-142ML_    1.4 ±20%<br>8.8<br>9.8<br>MSS1278-472ML_    4.7 ±20%<br>13.9<br>15.5|**DCR**3<br> **Inductance**2  **(mOhms) **<br>**(µH)**<br>**typ**<br>**max**<br>MSS1278-142ML_    1.4 ±20%<br>8.8<br>9.8<br>MSS1278-472ML_    4.7 ±20%<br>13.9<br>15.5|**DCR**3<br> **Inductance**2  **(mOhms) **<br>**(µH)**<br>**typ**<br>**max**<br>MSS1278-142ML_    1.4 ±20%<br>8.8<br>9.8<br>MSS1278-472ML_    4.7 ±20%<br>13.9<br>15.5|**SRF**<br> **typ**4<br>**(MHz) dro**<br>80.0<br>30.0|**Isat(A)**5**Irms(A)**6<br>**10% 20%**<br>**30% 20°C 40°C**<br>**drop drop drop rise rise**<br>25.2 28.6 30.6<br>7.00 10.00<br>13.7 15.2 15.9<br>4.30 6.20|**Isat(A)**5**Irms(A)**6<br>**10% 20%**<br>**30% 20°C 40°C**<br>**drop drop drop rise rise**<br>25.2 28.6 30.6<br>7.00 10.00<br>13.7 15.2 15.9<br>4.30 6.20|
|---|---|---|---|---|---|---|
|MSS1278-562ML_    5.6 ±20%|MSS1278-562ML_    5.6 ±20%|15.7|15.7<br>17.5|24.0|12.2 13.7 14.6|4.30 6.20|
|MSS1278-682ML_    6.8 ±20%<br>MSS1278-822ML_8.2 ±20%<br>MSS1278-103ML_   10 ±20%|MSS1278-682ML_    6.8 ±20%<br>8.2 ±20%<br>MSS1278-103ML_   10 ±20%|19.1<br>20.3<br>21.8|19.1<br>21.3<br>20.3<br>22.6<br>21.8<br>24.3|21.0<br>20.0<br>17.0|11.3 12.7 13.7<br>10.1 11.5 12.3<br>9.36 10.6 11.2|4.20 6.00<br>4.10 5.90<br>4.00 5.70|
|MSS1278-123ML_   12 ±20%|MSS1278-123ML_   12 ±20%|23.2|23.2<br>25.8|15.0|8.84 10.0 10.7|3.70 5.20|
|MSS1278-153ML_   15 ±20%<br>MSS1278-183ML_   18 ±20%<br>MSS1278-223ML_22 ±20%|MSS1278-153ML_   15 ±20%<br>MSS1278-183ML_   18 ±20%<br>22 ±20%|27.9<br>30.8<br>35.5|27.9<br>31.0<br>30.8<br>34.3<br>35.5<br>39.5|13.0<br>12.0<br>11.0|7.30 8.36 9.00 3.50 4.90<br>6.10 7.10 7.74 3.00 4.50<br>6.04 6.78 7.24 2.90 4.00|7.30 8.36 9.00 3.50 4.90<br>6.10 7.10 7.74 3.00 4.50<br>6.04 6.78 7.24 2.90 4.00|
|MSS1278-273ML_   27 ±20%|MSS1278-273ML_   27 ±20%|45.0|45.0<br>50.0|10.0|5.80 6.56 7.02 2.60 3.60|5.80 6.56 7.02 2.60 3.60|
|MSS1278-333ML_   33 ±20%<br>MSS1278-393ML_   39 ±20%<br>MSS1278-473ML_   47 ±20%|MSS1278-333ML_   33 ±20%<br>MSS1278-393ML_   39 ±20%<br>MSS1278-473ML_   47 ±20%|61.9<br>69.1<br>72.3|61.9<br>68.8<br>69.1<br>76.8<br>72.3<br>80.4|9.5<br>8.5<br>7.5|5.22 5.90 6.30 2.30 3.10<br>4.68 5.42 5.80 2.10 3.00<br>4.40 5.02 5.32 2.00 2.90|5.22 5.90 6.30 2.30 3.10<br>4.68 5.42 5.80 2.10 3.00<br>4.40 5.02 5.32 2.00 2.90|
|MSS1278-563ML_56 ±20%|56 ±20%|80.2|80.2<br>89.2|7.0|4.02 4.60 4.90 1.90 2.70|4.02 4.60 4.90 1.90 2.70|
|MSS1278-683ML_   68 ±20%<br>MSS1278-823ML_   82 ±20%<br>MSS1278-104ML_  100 ±20%|MSS1278-683ML_   68 ±20%<br>MSS1278-823ML_   82 ±20%<br>MSS1278-104ML_  100 ±20%|91.3 101.5<br>125.9 139.9<br>135.1 150.2|91.3 101.5<br>125.9 139.9<br>135.1 150.2|6.5<br>5.0<br>4.5|3.40 3.86 4.26 1.80 2.60<br>3.12 3.58 3.80 1.60 2.30<br>2.88 3.28 3.52 1.50 2.20|3.40 3.86 4.26 1.80 2.60<br>3.12 3.58 3.80 1.60 2.30<br>2.88 3.28 3.52 1.50 2.20|
|MSS1278-124KL_  120 ±10%|MSS1278-124KL_  120 ±10%|182.3 202.6|182.3 202.6|4.3|2.62 3.00 3.24 1.40 1.90|2.62 3.00 3.24 1.40 1.90|
|MSS1278-154KL_150 ±10%|150 ±10%|216.5 240.6|216.5 240.6|4.1|2.48 2.86 3.02 1.30 1.80|2.48 2.86 3.02 1.30 1.80|
|MSS1278-184KL_  180 ±10%<br>MSS1278-224KL_  220 ±10%<br>MSS1278-274KL_  270 ±10%<br>MSS1278-334KL_  330 ±10%<br>MSS1278-394KL_390 ±10%|MSS1278-184KL_  180 ±10%<br>MSS1278-224KL_  220 ±10%<br>MSS1278-274KL_  270 ±10%<br>MSS1278-334KL_  330 ±10%<br>390 ±10%|229.0 254.5<br>323.6 359.6<br>415.6 461.8<br>487.3 541.5<br>533.6 592.9|229.0 254.5<br>323.6 359.6<br>415.6 461.8<br>487.3 541.5<br>533.6 592.9|4.0<br>3.4<br>3.1<br>2.9<br>2.7|2.26 2.58 2.74 1.20 1.70<br>1.96 2.22 2.36 1.00 1.60<br>1.74 2.04 2.18 0.90 1.20<br>1.66 1.86 2.00 0.80 1.00<br>1.52 1.72 1.88 0.75 1.00|2.26 2.58 2.74 1.20 1.70<br>1.96 2.22 2.36 1.00 1.60<br>1.74 2.04 2.18 0.90 1.20<br>1.66 1.86 2.00 0.80 1.00<br>1.52 1.72 1.88 0.75 1.00|
|MSS1278-474KL_  470 ±10%<br>MSS1278-564KL_  560 ±10%<br>MSS1278-684KL_  680 ±10%<br>MSS1278-824KL_  820 ±10%<br>MSS1278-105KL_ 1000 ±10%|MSS1278-474KL_  470 ±10%<br>MSS1278-564KL_  560 ±10%<br>MSS1278-684KL_  680 ±10%<br>MSS1278-824KL_  820 ±10%<br>MSS1278-105KL_ 1000 ±10%|707.5 786.2<br>777.4 863.8<br>1045<br>1166<br>1334|707.5 786.2<br>777.4 863.8<br>1162<br>1296<br>1483|2.2<br>2.0<br>1.7<br>1.4<br>1.3|1.34 1.54 1.64 0.66 0.90<br>1.24 1.42 1.50 0.60 0.80<br>1.16 1.28 1.38 0.55 0.75<br>1.04 1.16 1.26 0.50 0.70<br>0.97 1.10 1.14 0.48 0.68|1.34 1.54 1.64 0.66 0.90<br>1.24 1.42 1.50 0.60 0.80<br>1.16 1.28 1.38 0.55 0.75<br>1.04 1.16 1.26 0.50 0.70<br>0.97 1.10 1.14 0.48 0.68|



**MSS1278-105KLD** 

- **Termination: L** = RoHS compliant matte tin over nickel over phos bronze. Special order: 

      - **T** = RoHS tin-silver-copper (95.5/4/0.5) or **S** = non-RoHS tin-lead (63/37). 

- **Packaging: D** = 13″ machine-ready reel. EIA481 embossed plastic tape (500 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge). 

   - **B** = Less than full reel. In an effort to simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes. When ordering, simply change the last letter of your part number from B to D. 

2. Inductance tested at 100 kHz, 0.1 Vrms, 0 Adc using an Agilent/HP 4263B LCR meter or equivalent. 

3. DCR measured on a micro-ohmmeter and a Coilcraft CCF858 test fixture. 

4. SRF measured using an Agilent/HP 4191A or equivalent. 

5. DC current at 25°C that causes the specified inductance drop from its value without current. Click for temperature derating information. 

6. Current that causes the specified temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings. Click for temperature derating information. 

7. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. 

## Document 322-1 Revised 01/28/22 

**US** +1-847-639-6400   sales@coilcraft.com **UK** +44-1236-730595   sales@coilcraft-europe.com **Taiwan** +886-2-2264 3646   sales@coilcraft.com.tw **China** +86-21-6218 8074   sales@coilcraft.com.cn **Singapore** + 65-6484 8412   sales@coilcraft.com.sg 

© Coilcraft Inc. 2022 

This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information. 

Document 322-2 

AEC Q200 +85°C 

## **SMT Power Inductors – MSS1278** 

## **Typical L vs Current** 

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**----- Start of picture text -----**<br>
10000<br>1000 µH<br>1000<br>100 µH<br>100<br>10 µH<br>10<br>4.7 µH<br>1<br>0.1 1 10 100<br>Current (A)<br>Inductance (µH)<br>**----- End of picture text -----**<br>


## **Typical L vs Frequency** 

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**----- Start of picture text -----**<br>
10000<br>1000 µH<br>1000<br>100 µH<br>100<br>10 µH<br>10<br>4.7 µH<br>1<br>0.01 0.1 1 10<br>Frequency (MHz)<br>Inductance (µH)<br>**----- End of picture text -----**<br>


**==> picture [240 x 238] intentionally omitted <==**

**==> picture [81 x 14] intentionally omitted <==**

**----- Start of picture text -----**<br>
Dimensions are in [inches ]<br>mm<br>**----- End of picture text -----**<br>


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Document 322-2 Revised 01/28/22 

© Coilcraft Inc. 2022 This product may not be used in medical or high risk applications without prior Coilcraft approval Specification subject to change without notice Please check web site for latest information 

**US** +1-847-639-6400   sales@coilcraft.com **UK** +44-1236-730595   sales@coilcraft-europe.com **Taiwan** +886-2-2264 3646   sales@coilcraft.com.tw **China** +86-21-6218 8074   sales@coilcraft.com.cn **Singapore** + 65-6484 8412   sales@coilcraft.com.sg

Updated at March 10, 2026

Coilcraft is a globally recognized leader in the design and manufacture of high-performance magnetic components. Renowned for its engineering excellence, reliable delivery, and stringent quality standards, the company provides essential solutions for a wide array of demanding applications, including signal processing, RF, power management, and timing circuits. Our comprehensive portfolio of Coilcraft components is centered on their industry-leading inductor technologies. This encompasses a vast selection of high-efficiency power inductors designed to optimize modern power supply architectures, alongside precision RF inductors engineered to deliver exceptional stability and performance in high-frequency communications and wireless applications. To support complete electromagnetic compatibility and comprehensive circuit design, we also offer a variety of Coilcraft's specialized magnetic solutions. This includes robust common mode chokes and filters for effective EMC and RFI suppression, current sensing transformers, and a selection of inductor kits and assortments that provide design engineers with versatile options for rapid prototyping and development.

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