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Product Detailed Parameters
- Description：CMC 3.9MH 4A 2LN TH
- Series：RN
- Mfr：Schaffner EMC Inc.
- Package：Tube
- Filter Type：Power Line
- Number of Lines：2
- Current Rating (Max)：4A
- DC Resistance (DCR) (Max)：59mOhm (Typ)
- Voltage Rating - DC：-
- Voltage Rating - AC：300V
- Operating Temperature：-40°C ~ 100°C
- Ratings：-
- Approval Agency：ENEC, UR, VDE
- Features：-
- Mounting Type：Through Hole
- Size / Dimension：1.303" L x 1.280" W (33.10mm x 32.50mm)
- Height (Max)：0.787" (20.00mm)
- Package / Case：Horizontal, 4 PC Pin
- Inductance @ Frequency：3.9 mH @ 10 kHz
- Qualification：-
- Grade：-
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Overview
The Schaffner RN143-4-02-3M9 is a horizontal through-hole common mode choke designed for power line applications. It features an inductance of 3.9 mH and supports a maximum DC current of 4 A. The component has a typical maximum DC resistance of 59 mOhms and is rated for 300 VAC. Operating within a temperature range of -40°C to +100°C, it utilizes a four-pin horizontal package measuring 33.10 mm in length, 32.50 mm in width, and 20.00 mm in height.
Feature Summary
- Provides effective common mode noise suppression for power lines
- Designed for reliable through-hole PCB mounting
- Supports high current ratings with low DC resistance
Applications
- Power supplies
- Battery chargers
- Portable devices
- Energy-efficient systems
Procurement Notes
Verify the specific part number against official TE Connectivity or Schaffner documentation to confirm electrical parameters and mechanical dimensions. Ensure compatibility with existing PCB layouts regarding pin spacing and height constraints. Cross-reference RoHS compliance status and operating temperature ranges with project requirements before finalizing procurement decisions.
Selection Notes
Select this component when designing circuits requiring common mode filtering for power lines with currents up to 4 A. Consider the 3.9 mH inductance value for appropriate noise attenuation at target frequencies. Evaluate the horizontal form factor for space-constrained board designs where vertical clearance is limited but surface area is available.
Part Context
This component belongs to the RN143 series of common mode chokes manufactured by Schaffner EMC Inc., now part of TE Connectivity. The series is engineered for electromagnetic interference (EMI) suppression in various electronic systems. The RN143-4-02-3M9 variant specifically targets applications needing moderate inductance and current handling capabilities in a compact horizontal package.
Replacement Considerations
Consult official datasheets for direct substitutes within the RN143 series or equivalent Schaffner/TE Connectivity products. Verify that alternative components match the 3.9 mH inductance, 4 A current rating, and 59 mOhm resistance specifications to ensure circuit performance integrity.
