CMS1-4-R The CMS1-4-R is a surface-mount common mode choke from Eaton with 18µH inductance per line, 3.8A current rating, and 8.9mΩ DCR. It comes in a horizontal 4-pad package and operates from -40°C to 160°C.
Mfr Part #:

CMS1-4-R

Available from 1 distributors
Mfr Name: Eaton - Electronics Division
Eaton - Electronics Division
The CMS1-4-R is a surface-mount common mode choke from Eaton with 18µH inductance per line, 3.8A current rating, and 8.9mΩ DCR. It comes in a horizontal 4-pad package and operates from -40°C to 160°C.
Total Stock: 41 pcs
$ Price Range: $1.61 - $3.13

CMS1-4-R Available from 1 distributor

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CMS1-4-R Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current Rating
Current Rating (Max)
DC Resistance (DCR)
DC Resistance (DCR) (Max)
Filter Type
Height (Max)
Inductance @ Frequency
Mounting Type
Number of Lines
Operating Temperature

CMS1-4-R Description

Short technical summary and product information.

The CMS1-4-R is a surface-mount common mode choke from Eaton - Electronics Division, designed for power line filtering applications. It provides 18µH inductance at 100 kHz across two lines, with a maximum current rating of 3.8A and a maximum DC resistance of 8.9mΩ.\n\nThis choke is housed in a horizontal 4-pad surface-mount package measuring 9.4mm x 7.2mm x 2.6mm. The compact design is suitable for automated PCB assembly and space-constrained layouts. It operates over a wide temperature range of -40°C to 160°C, making it suitable for demanding environments.\n\nCommon mode chokes are essential for suppressing electromagnetic interference (EMI) in power supply and signal lines. The CMS1-4-R effectively attenuates common-mode noise while allowing desired differential signals to pass. Its high current rating and low DCR help minimize power loss in high-current paths.

CMS1-4-R Quick Information

Product Type: Common Mode Choke
Series: CMS1
Canonical Name: 18µH 3.8A 2-Line Surface Mount Common Mode Choke
Subcategory: Power Line Chokes

CMS1-4-R Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

CMS1-4-R Estimated Pricing

Qty Low High
1+ $3.13 $3.13
10+ $2.58 $2.58
25+ $2.38 $2.38
50+ $2.25 $2.25
100+ $2.12 $2.12
250+ $1.97 $1.97
2,000+ $1.68 $1.68
4,000+ $1.61 $1.61

Estimated market price range - modelled values for guidance only, not live distributor offers.

CMS1-4-R Features

  • Provides two-line common-mode filtering.
  • Rated for 3.8A maximum current.
  • Offers 18µH inductance at 100kHz.
  • Operates from -40°C to 160°C.
  • Surface mount horizontal 4-pad package.

CMS1-4-R Applications

  • Suppresses common-mode EMI in power supplies.
  • Used in DC-DC converter input filters.
  • Ideal for automotive electronics environments.
  • Fits compact surface-mount PCB designs.

CMS1-4-R FAQs

7 frequently asked questions generated from this part’s specifications.
What is the package or case type of the CMS1-4-R?

Horizontal, 4 PC Pad (surface mount).

What is the operating temperature range of the CMS1-4-R?

-40°C to 160°C.

Is the CMS1-4-R RoHS compliant?

Yes, RoHS3 compliant (per existing data, unverified).

What is the inductance of the CMS1-4-R?

18µH at 100kHz.

What is the maximum current rating of the CMS1-4-R?

3.8A.

What is the maximum DC resistance of the CMS1-4-R?

8.9mΩ (typ).

How many lines does the CMS1-4-R have?

2 lines.

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