# Common Mode Choke, 18 uH, 3.8 A, 9.4mm x 7.2mm x 2.6mm

![Product image](https://novapart.co/image/farnell:3650497/)

**URL**: https://novapart.co/products/CMS1-4-R/common-mode-choke-18-uh-38-a-94mm-x-72mm-26mm
**SKU**: CMS1-4-R
**Manufacturer**: EATON BUSSMANN
**Category**: Passive Components || EMC / RFI Suppression || Common Mode Chokes / Filters || SMD Common Mode Chokes / Filters
**Price**: €1.7100
**Stock**: 500+
**Lead Time**: 134 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | To Be Advised |
| Impedance | - |
| Inductance | 18µH |
| Product Range | CMS Series |
| Product Width | 7.2mm |
| Qualification | - |
| Product Height | 2.6mm |
| Product Length | 9.4mm |
| Dc Current Rating | 3.8A |
| Dc Resistance Max | 0.0089ohm |
| Common Mode Filter Case | 9.4mm x 7.2mm x 2.6mm |
| Inductor Case / Package | - |
| Operating Temperature Max | 160°C |
| Operating Temperature Min | -40°C |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3650497/)

## **CMS-SERIES Common Mode Inductors (Surface Mount)** 

## **Description** 

- 160°C maximum total temperature 

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**----- Start of picture text -----**<br>
RoHS<br>2002/95/EC<br>**----- End of picture text -----**<br>


- Three sizes of surface mount torroidal common mode inductors that provide 300Vdc isolation 

- Inductance range from 5.5uH to 1600uH 

- Current range up to 7.0 Amps 

- Noise attenuation up to 44 dB 

- Frequency range up to 100 MHz 

- Meets UL94V-0 flammability standard 

- Ferrite core material 

## **Applications** 

- EMI filters 

- DC-DC brick power supplies 

- Discrete output supplies 

- Discrete and point-of-use power supplies (PUPS) 

## **Environmental Data** 

- Storage temperature range: -40°C to +160°C 

- Operating ambient temperature range: -40°C to +160°C (range is application specific) 

## **Packaging** 

   - Supplied in tape and reel packaging, 2,000 (CMS1), 800 (CMS2), and 600 (CMS3) per reel 

- Solder reflow temperature: +260°C max for 10 seconds max. 

|**Part Number**<br>~~es~~|**OCL**<br>**(uH) minimum**<br>**(1-2) & (3-4)**<br>~~GO~~|**I rms.**<br>**Amperes**<br>**Max ***<br>~~GO~~|**DCR (**Ω**) typ**<br>**@ 20°C**<br>**(1-2)**<br>~~QQ~~|**DCR (**Ω**) typ**<br>**@ 20°C**<br>**(4-3)**<br>~~QQ~~|**Leakage**<br>**Inductance (uH)**<br>**typ**|**Interwinding**<br>**Capacitance (pF)**<br>**typ**|
|---|---|---|---|---|---|---|
|**CMS1-1-R**<br>~~es~~<br>~~es~~|4.5<br>~~GO~~<br>~~GO~~|7.00<br>~~GO~~<br>~~GO~~|0.0027<br>~~QQ~~<br>~~QQ~~|0.0027<br>~~QQ~~<br>~~QQ~~|0.05|2.0|
|**CMS1-2-R**<br>~~es~~<br>~~es~~<br>~~es~~|8<br>~~GO~~<br>~~GO~~<br>~~GO~~|5.70<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.0040<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.0040<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.09|2.1|
|**CMS1-3-R**<br>~~es~~<br>~~es~~<br>~~es~~|12.6<br>~~GO~~<br>~~GO~~<br>~~GO~~|4.10<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.0077<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.0077<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.14|2.2|
|**CMS1-4-R**<br>~~es~~<br>~~es~~<br>~~es~~|18<br>~~GO~~<br>~~GO~~<br>~~GO~~|3.80<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.0089<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.0089<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.20|2.3|
|**CMS1-5-R**<br>~~es~~<br>~~es~~<br>~~es~~|25<br>~~GO~~<br>~~GO~~<br>~~GO~~|3.60<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.0100<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.0100<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.28|2.4|
|**CMS1-6-R**<br>~~es~~<br>~~es~~<br>~~es~~|32.8<br>~~GO~~<br>~~GO~~<br>~~GO~~|3.10<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.0138<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.0138<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.36|2.5|
|**CMS1-7-R**<br>~~es~~<br>~~es~~<br>~~es~~|41.5<br>~~GO~~<br>~~GO~~<br>~~GO~~|2.60<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.019<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.019<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.45|2.6|
|**CMS1-8-R**<br>~~es~~<br>~~es~~<br>~~es~~|51.2<br>~~GO~~<br>~~GO~~<br>~~GO~~|2.20<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.026<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.026<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.056|2.7|
|**CMS1-9-R**<br>~~es~~<br>~~es~~<br>~~es~~|62<br>~~GO~~<br>~~GO~~<br>~~GO~~|1.90<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.035<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.035<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.68|2.7|
|**CMS1-10-R**<br>~~es~~<br>~~es~~<br>~~es~~|73.7<br>~~GO~~<br>~~GO~~<br>~~GO~~|1.65<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.048<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.048<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.81|2.8|
|**CMS1-11-R**<br>~~es~~<br>~~es~~<br>~~es~~|100<br>~~GO~~<br>~~GO~~<br>~~GO~~|1.35<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.070<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.070<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|1.10|2.9|
|**CMS1-12-R**<br>~~es~~<br>~~es~~<br>~~es~~|131<br>~~GO~~<br>~~GO~~<br>~~GO~~|1.15<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.100<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.100<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|1.45|3.0|
|**CMS1-13-R**<br>~~es~~<br>~~es~~<br>~~es~~|166<br>~~GO~~<br>~~GO~~<br>~~GO~~|1.00<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.138<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.138<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|1.83|3.1|
|**CMS1-14-R**<br>~~es~~<br>~~es~~<br>~~es~~|205<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.85<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.186<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.186<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|2.25|3.2|
|**CMS2-1-R**<br>~~es~~<br>~~es~~<br>~~es~~|25<br>~~GO~~<br>~~GO~~<br>~~GO~~|5.35<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.005<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.005<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.22|2.0|
|**CMS2-2-R**<br>~~es~~<br>~~es~~<br>~~es~~|40<br>~~GO~~<br>~~GO~~<br>~~GO~~|4.40<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.008<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.008<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.34|2.3|
|**CMS2-3-R**<br>~~es~~<br>~~es~~<br>~~es~~|57<br>~~GO~~<br>~~GO~~<br>~~GO~~|3.60<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.012<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.012<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.47|2.5|
|**CMS2-4-R**<br>~~es~~<br>~~es~~<br>~~es~~|102<br>~~GO~~<br>~~GO~~<br>~~GO~~|2.80<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.019<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.019<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.80|2.8|
|**CMS2-5-R**<br>~~es~~<br>~~es~~<br>~~es~~|160<br>~~GO~~<br>~~GO~~<br>~~GO~~|2.30<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.029<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.029<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|1.25|3.1|
|**CMS2-6-R**<br>~~es~~<br>~~es~~<br>~~es~~|230<br>~~GO~~<br>~~GO~~<br>~~GO~~|1.85<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.044<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.044<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|1.75|3.4|
|**CMS2-7-R**<br>~~es~~<br>~~es~~<br>~~es~~|270<br>~~GO~~<br>~~GO~~<br>~~GO~~|1.60<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.060<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.060<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|2.00|3.6|
|**CMS2-8-R**<br>~~es~~<br>~~es~~<br>~~es~~|360<br>~~GO~~<br>~~GO~~<br>~~GO~~|1.35<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.084<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.084<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|2.60|3.9|
|**CMS2-9-R**<br>~~es~~<br>~~es~~<br>~~es~~|460<br>~~GO~~<br>~~GO~~<br>~~GO~~|1.10<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.120<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.120<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|3.30|4.1|
|**CMS2-10-R**<br>~~es~~<br>~~es~~<br>~~es~~|575<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.94<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.170<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.170<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|4.00|4.3|
|**CMS2-11-R**<br>~~es~~<br>~~es~~<br>~~es~~|700<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.80<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.230<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.230<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|5.00|4.6|
|**CMS2-12-R**<br>~~es~~<br>~~es~~<br>~~es~~|915<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.67<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.330<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.330<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|6.30|4.9|
|**CMS2-13-R**<br>~~es~~<br>~~es~~<br>~~es~~|1070<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.58<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.440<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.440<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|7.30|5.1|
|**CMS2-14-R**<br>~~es~~<br>~~es~~<br>~~es~~|1340<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.50<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.620<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.620<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|9.00|5.4|
|**CMS3-1-R**<br>~~es~~<br>~~es~~<br>~~es~~|28<br>~~GO~~<br>~~GO~~<br>~~GO~~|5.70<br>~~GO~~<br>~~GO~~<br>~~GO~~|0.005<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.005<br>~~QQ~~<br>~~QQ~~<br>~~QQ~~|0.31|2.80|
|**CMS3-2-R**<br>~~es~~<br>~~es~~<br>~~es~~|45<br>~~GO~~<br>~~GO~~<br>~~es nn~~|5.10<br>~~GO~~<br>~~GO~~<br>~~nn~~|0.006<br>~~QQ~~<br>~~QQ~~<br>~~SD~~|0.006<br>~~QQ~~<br>~~QQ~~|0.46|3.05|
|**CMS3-3-R**<br>~~es~~<br>~~es~~|64<br>~~GO~~<br>~~es nn~~|4.75<br>~~GO~~<br>~~nn~~|0.007<br>~~QQ~~<br>~~SD~~|0.007<br>~~QQ~~|0.64|3.30|



## **Definitions:** 

OCL = Open Circuit Inductance 

DCR = Direct Current Resistance 

Irms = rms current for approx. a 40°C temperature rise at an ambient temperature of 85°C. *Operating Temperature: 160°C Max. Inductance values are sustained up to 160°C. 

## **Electrical Characteristics:** 

OCL (1-2) 0.10Vrms, 100kHz, 0.0Adc: (See Chart) OCL (4-3) 0.10Vrms, 100kHz, 0.0Adc: (See Chart) DCR (1-2) typ @ 20°C: (See Chart) DCR (4-3) typ @ 20°C: (See Chart) Hipot rating: winding to winding: 300Vdc min. for 1 second. Turns Ratio: (1-2):(4-3) 1:1 

## **CMS-SERIES Common Mode Inductors (Surface Mount)** 

|**Part Number**|**OCL**<br>**(uH) minimum**<br>**(1-2) & (3-4)**|**I rms.**<br>**Amperes**<br>**Max ***|**DCR (**Ω**) typ**<br>**DCR**<br>**@ 20°C**<br>**@**<br>**(1-2)**<br>**(4**|**(**Ω**) typ**<br>**Leakage**<br>**20°C**<br>**Inductance (uH)**<br>**-3)**<br>**typ**|**Interwinding**<br>**Capacitance (pF)**<br>**typ**|
|---|---|---|---|---|---|
|**CMS3-4-R**|88|3.95|0.010<br>0.|010<br>0.85|3.50|
|**CMS3-5-R**|146|3.10|0.017<br>0.|017<br>1.30|3.70|
|**CMS3-6-R**|217|2.85|0.020<br>0.|020<br>1.90|3.90|
|**CMS3-7-R**|258|2.45|0.027<br>0.|027<br>2.20|4.15|
|**CMS3-8-R**|350|2.00|0.040<br>0.|040<br>3.00|4.40|
|**CMS3-9-R**|400|1.70|0.053<br>0.|053<br>3.30|4.65|
|**CMS3-10-R**|518|1.45|0.076<br>0.|076<br>4.20|4.85|
|**CMS3-11-R**|648|1.20|0.107<br>0.|107<br>5.10|5.10|
|**CMS3-12-R**|790|1.05|0.145<br>0.|145<br>6.10|5.35|
|**CMS3-13-R**|1030|0.88|0.210<br>0.|210<br>7.80|5.55|
|**CMS3-14-R**|1310|0.75|0.300<br>0.|300<br>9.60|5.80|



## **Definitions:** 

OCL = Open Circuit Inductance DCR = Direct Current Resistance 

Irms = rms current for approx. a 40°C temperature rise at an ambient temperature of 85°C. *Operating Temperature: 160°C Max. Inductance values are sustained up to 160°C. 

## **Electrical Characteristics:** 

OCL (1-2) 0.10Vrms, 100kHz, 0.0Adc: (See Chart) OCL (4-3) 0.10Vrms, 100kHz, 0.0Adc: (See Chart) DCR (1-2) typ @ 20°C: (See Chart) DCR (4-3) typ @ 20°C: (See Chart) Hipot rating: winding to winding: 300Vdc min. for 1 second. Turns Ratio: (1-2):(4-3) 1:1 

## **Mechanical Diagrams** 

## RECOMMENDED PCB LAYOUT 

## CMS1 Series 

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**----- Start of picture text -----**<br>
TOP VIEW<br>9.4 max<br>FRONT VIEW<br>3 2<br>CMS1-<br>wwllyy R 7.2 max<br>4 1 2.6 max<br>Pin 1 indicator<br>White dot<br>**----- End of picture text -----**<br>


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SCHEMATIC<br>1:1<br>1 4<br>2 3<br>**----- End of picture text -----**<br>


## CMS2 Series 

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**==> picture [72 x 82] intentionally omitted <==**

## CMS3 Series 

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**==> picture [86 x 83] intentionally omitted <==**

wwllyy = Date code  R = Revision level 

## **CMS-SERIES Common Mode Inductors (Surface Mount)** 

## **Packaging Information** 

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**----- Start of picture text -----**<br>
CMS1 Series CMS2 Series<br>4.0� 4.0�<br>1.5 Dia�.30�min. See note 6See note 12.0� 1.5 Dia.�+0.1/-0.0A Pin #1 indicator 1 .75 +/-0.050.30 � +0.1/-0.01.5 dia� (see note 6)2.0� (see note 1) 1.5 dia�min A 1 .75<br>+/-0.05<br>0.3Rad max. See note 67.5� 16.0� Ao=9.3mmBo=9.3mm 0.3Radmax. Pin #1 Indicator (see note 6)11.5� 24.0�<br>Bo +/-0.3 Ko=6.4mm B +/-0.3<br>Ao= 7.3mm�<br>Bo= 10.1mm�<br>Ko= 2.7mm<br>K o Ao 1 2.0 A 0.5Rad�typ. K6.7 A 12.0 A 0.5 rad�typ<br>SECTION A-A SECTION A-A<br>Direction of feed User direction of feed<br>**----- End of picture text -----**<br>


CMS3 Series 

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**----- Start of picture text -----**<br>
4.0�<br>(see note 1)<br>2.0�<br>+/-0.050.35 � +0.1/-0.01.5 dia� (see note 6) 1.5 dia�min A 1 .75<br>Ao=11.8mm 0.3Radmax. Pin #1 Indicator (see note 6)11.5�<br>Bo=11.8mm 24.0�<br>Ko=6.8mm B +/-0.3<br>7 K.1 A A 0.5 rad�typ<br>SECTION A-A 1 6.0<br>User direction of feed<br>Attenuation Curves<br>Attenuation       CMS 1    Series  Attenuation       CMS 2    Series<br>0 0<br>-1   -4     -7   -5 -1    -4   -7<br>-5<br>-10<br>-10 -15<br>-15 -20<br>-25<br>-20 -30<br>-25 -35<br>-40<br>-30<br>-45<br>-11    -14<br>-35 -50 -11    -14<br>1 2 4 6 8 10 20 40 60 1 2 4 6 8 10 20 40 60<br>FREQUENCY (MHz) FREQUENCY (MHz)<br>dB dB<br>**----- End of picture text -----**<br>


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Attenuation       CMS 3    Series<br>0<br> -1    -4    -7<br>-5<br>-10<br>-15<br>-20<br>-25<br>-30<br>-35<br>-40<br>-45<br>-11       -14<br>-50<br>1 2 4 6 8 10 20 40<br>FREQUENCY (MHz)<br>dB<br>**----- End of picture text -----**<br>


## **CMS-SERIES Common Mode Inductors (Surface Mount)** 

## **Impedance Curves** 

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**----- Start of picture text -----**<br>
Impedance     CMS1-1 & 4  Impedance     CMS1  - 7,11, & 14<br>350 4000<br>-14<br>300<br>-4<br>250 3000<br>200  -11 -7<br>150  -1 2000<br>100<br>1000<br>50<br>0<br>0<br>0.4 0.6 0.8 1 2 3 4 6 8 10<br>0.4 0.6 0.8 1 2 3 4 6 8 10<br>FREQUENCY (MHz) FREQUENCY (MHz)<br>Impedance     CMS2  -  1 & 4  Impedance     CMS2 -  7,11, & 14<br>18000<br>1800 -14<br>16000<br>1600<br>1400 -4 14000<br>1200 12000<br> -11<br>1000 10000<br>800600 -1 8000 -7<br>6000<br>400<br>200 4000<br>0 2000<br>0.4 0.6 0.8 1 2 4 6 8 10 20 0<br>0.4 0.6 0.8 1 2 3 4 6<br>FREQUENCY (MHz)<br>FREQUENCY (MHz)<br>Impedance     CMS3 - 1 & 4  Impedance     CMS3  - 7,11, & 14<br>1600 16000<br>1400 14000<br>-4 -14<br>1200 12000<br> -11<br>1000 10000<br>800 8000 -7<br> -1<br>600 6000<br>400 4000<br>200 2000<br>0 0<br>0.4 0.6 0.8 1 2 3 4 6 8 0.4 0.6 0.8 1 2 3 4 6 8<br>FREQUENCY (MHz) FREQUENCY (MHz)<br>Z (Ohms) Z (Ohms)<br>Z (Ohms) Z (Ohms)<br>Z (Ohms) Z (Ohms)<br>**----- End of picture text -----**<br>


## PM-4313  3/07 

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