MSS1278-684KLD

Power Inductor (SMD), 680 µH, 750 mA, Shielded, 1.16 A, MSS1278

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Manufacturer: COILCRAFT
Product type: SMD Power Inductors
Inductance: 680µH
Product Range: MSS1278
Product Width: 12.3mm
Product Height: 8.05mm
Product Length: 12.3mm
DC Resistance Max: 1.162ohm
RMS Current (Irms): 750mA
Power Inductor Case: 12.3mm x 12.3mm x 8.05mm
Inductance Tolerance: ± 10%
Inductor Construction: Shielded
Saturation Current (Isat): 1.16A

Delivery and price
Units per pack	1
Price	0.506 €
Current stock	10+
Lead time	30 days

Datasheet

Document 322-1 

## **– 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 I rms current, +85°C to +125°C with derated current 

**Storage temperature** Component: –40°C to +125°C. 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) 

**Failures in Time (FIT) / Mean Time Between Failures (MTBF)** 38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332 **Packaging** 500/13″ reel; Plastic tape: 24 mm wide, 0.4 mm thick, 16 mm  pocket spacing, 8.1 mm pocket depth 

**PCB washing** Only pure water or alcohol recommended 

|**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|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|21.3<br>22.6<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|25.8|15.0|8.84 10.0 10.7|3.70 5.20|
|MSS1278-153ML_   15 ±20%|MSS1278-153ML_   15 ±20%|27.9|31.0|13.0|7.30 8.36 9.00 3.50 4.90|7.30 8.36 9.00 3.50 4.90|
|MSS1278-183ML_   18 ±20%<br>MSS1278-223ML_22 ±20%|MSS1278-183ML_   18 ±20%<br>22 ±20%|30.8<br>35.5|34.3<br>39.5|12.0<br>11.0|6.10 7.10 7.74 3.00 4.50<br>6.04 6.78 7.24 2.90 4.00|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|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%|MSS1278-333ML_   33 ±20%|61.9|68.8|9.5|5.22 5.90 6.30 2.30 3.10|5.22 5.90 6.30 2.30 3.10|
|MSS1278-393ML_   39 ±20%<br>MSS1278-473ML_   47 ±20%<br>MSS1278-563ML_56 ±20%|MSS1278-393ML_   39 ±20%<br>MSS1278-473ML_   47 ±20%<br>56 ±20%|69.1<br>72.3<br>80.2|76.8<br>80.4<br>89.2|8.5<br>7.5<br>7.0|4.68 5.42 5.80 2.10 3.00<br>4.40 5.02 5.32 2.00 2.90<br>4.02 4.60 4.90 1.90 2.70|4.68 5.42 5.80 2.10 3.00<br>4.40 5.02 5.32 2.00 2.90<br>4.02 4.60 4.90 1.90 2.70|
|MSS1278-683ML_   68 ±20%|MSS1278-683ML_   68 ±20%|91.3 101.5|91.3 101.5|6.5|3.40 3.86 4.26 1.80 2.60|3.40 3.86 4.26 1.80 2.60|
|MSS1278-823ML_   82 ±20%<br>MSS1278-104ML_  100 ±20%<br>MSS1278-124KL_  120 ±10%<br>MSS1278-154KL_150 ±10%<br>MSS1278-184KL_  180 ±10%<br>MSS1278-224KL_  220 ±10%|MSS1278-823ML_   82 ±20%<br>MSS1278-104ML_  100 ±20%<br>MSS1278-124KL_  120 ±10%<br>150 ±10%<br>MSS1278-184KL_  180 ±10%<br>MSS1278-224KL_  220 ±10%|125.9 139.9<br>135.1 150.2<br>182.3 202.6<br>216.5 240.6<br>229.0 254.5<br>323.6 359.6|125.9 139.9<br>135.1 150.2<br>182.3 202.6<br>216.5 240.6<br>229.0 254.5<br>323.6 359.6|5.0<br>4.5<br>4.3<br>4.1<br>4.0<br>3.4|3.12 3.58 3.80 1.60 2.30<br>2.88 3.28 3.52 1.50 2.20<br>2.62 3.00 3.24 1.40 1.90<br>2.48 2.86 3.02 1.30 1.80<br>2.26 2.58 2.74 1.20 1.70<br>1.96 2.22 2.36 1.00 1.60|3.12 3.58 3.80 1.60 2.30<br>2.88 3.28 3.52 1.50 2.20<br>2.62 3.00 3.24 1.40 1.90<br>2.48 2.86 3.02 1.30 1.80<br>2.26 2.58 2.74 1.20 1.70<br>1.96 2.22 2.36 1.00 1.60|
|MSS1278-274KL_  270 ±10%|MSS1278-274KL_  270 ±10%|415.6 461.8|415.6 461.8|3.1|1.74 2.04 2.18 0.90 1.20|1.74 2.04 2.18 0.90 1.20|
|MSS1278-334KL_  330 ±10%|MSS1278-334KL_  330 ±10%|487.3 541.5|487.3 541.5|2.9|1.66 1.86 2.00 0.80 1.00|1.66 1.86 2.00 0.80 1.00|
|MSS1278-394KL_390 ±10%|390 ±10%|533.6 592.9|533.6 592.9|2.7|1.52 1.72 1.88 0.75 1.00|1.52 1.72 1.88 0.75 1.00|
|MSS1278-474KL_  470 ±10%|MSS1278-474KL_  470 ±10%|707.5 786.2|707.5 786.2|2.2|1.34 1.54 1.64 0.66 0.90|1.34 1.54 1.64 0.66 0.90|
|MSS1278-564KL_  560 ±10%|MSS1278-564KL_  560 ±10%|777.4 863.8|777.4 863.8|2.0|1.24 1.42 1.50 0.60 0.80|1.24 1.42 1.50 0.60 0.80|
|MSS1278-684KL_  680 ±10%|MSS1278-684KL_  680 ±10%|1045|1162|1.7|1.16 1.28 1.38 0.55 0.75|1.16 1.28 1.38 0.55 0.75|
|MSS1278-824KL_  820 ±10%|MSS1278-824KL_  820 ±10%|1166|1296|1.4|1.04 1.16 1.26 0.50 0.70|1.04 1.16 1.26 0.50 0.70|
|MSS1278-105KL_ 1000 ±10%|MSS1278-105KL_ 1000 ±10%|1334|1483|1.3|0.97 1.10 1.14 0.48 0.68|0.97 1.10 1.14 0.48 0.68|



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

## **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). 

   - **B** = Less than full reel. In tape, but not machine ready. To have a leader and trailer added ($25 charge), use code letter D instead. 

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 which the inductance drops the specified amount from its value without current. 

6. Current that causes the specified temperature rise from 25°C ambient. 

7. Electrical specifications at 25°C. 

- Refer to Doc 362 “Soldering Surface Mount Components” before soldering. 

Document 322-1 Revised 08/18/11 

Document 322-2 

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## **SMT Power Inductors – MSS1278** 

## **Typical L vs Current** 

## **Typical L vs Frequency** 

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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>


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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>


## **Typical Current Derating** 

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120<br>110<br>100<br>90<br>80<br>70<br>60<br>50<br>40<br>30<br>20<br>Isat<br>10<br>Irms<br>0<br>-40 -20 0 20 40 60 80 100 120 140<br>Ambient temperature (°C)<br>25°C<br>Percent of rated current<br>**----- End of picture text -----**<br>


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


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Document 322-2 Revised 08/18/11 

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Updated at February 9, 2023

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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