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Product Detailed Parameters
- Description：CMC 27MH 1.4A 2LN TH
- Series：RN
- Mfr：Schaffner EMC Inc.
- Package：Tube
- Filter Type：Power Line
- Number of Lines：2
- Current Rating (Max)：1.4A
- DC Resistance (DCR) (Max)：500mOhm (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：27 mH @ 10 kHz
- Qualification：-
- Grade：-
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Overview
The Schaffner RN142-1.4-02-27M is a horizontal common mode choke designed for through-hole PCB mounting. It features an inductance of 27 mH and supports a maximum DC current of 1.4 A with a maximum DC resistance of 500 mOhms. The component operates within a temperature range of -40°C to +100°C and utilizes ferrite core material. Its physical dimensions are 33.1 mm x 32.5 mm x 20.0 mm, providing a compact form factor for electronic circuit integration.
Feature Summary
- Horizontal construction optimized for printed circuit board mounting
- Ferrite core design for effective electromagnetic interference suppression
- Through-hole termination style for secure mechanical attachment
Applications
- Power supply input filtering
- Battery charger circuits
- Portable electronic devices
- Energy-efficient system power stages
Procurement Notes
Verify the specific part number RN142-1.4-02-27M against official TE Connectivity / Schaffner documentation to confirm electrical ratings and physical dimensions. Ensure compatibility with your PCB layout regarding through-hole spacing and height constraints. Cross-reference manufacturer datasheets for precise tolerance and thermal performance data before finalizing procurement decisions.
Selection Notes
Select this component when high inductance is required for common mode noise reduction in low-current applications up to 1.4 A. The horizontal package suits space-constrained boards where vertical clearance is limited. Verify that the 27 mH value aligns with your filter design requirements and that the 500 mOhm resistance meets efficiency targets.
Part Context
This component belongs to the RN series of common mode chokes manufactured by Schaffner EMC Inc., now part of TE Connectivity. The series offers various inductance and current ratings tailored for EMI/EMC compliance in diverse electronic equipment. The RN142 variant specifically addresses applications requiring robust noise suppression in a standard through-hole format.
Replacement Considerations
Check for direct substitutes within the RN series or equivalent models from other manufacturers offering similar 27 mH inductance and 1.4 A current handling. Ensure any replacement matches the horizontal footprint and pin configuration to maintain PCB compatibility without redesign.
