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Product Detailed Parameters
- Description：CMC 33MH 1A 2LN TH
- Series：RN
- Mfr：Schaffner EMC Inc.
- Package：Tray
- Filter Type：Power Line
- Number of Lines：2
- Current Rating (Max)：1A (Typ)
- DC Resistance (DCR) (Max)：810mOhm (Typ)
- Voltage Rating - DC：-
- Voltage Rating - AC：250V
- Operating Temperature：-40°C ~ 125°C
- Ratings：-
- Approval Agency：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：33 mH @ 1 kHz
- Qualification：-
- Grade：-
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Overview
The Schaffner RN142-1-02 is a current-compensated common mode choke from the RN series, designed for through-hole PCB mounting. It features a ferrite core and operates within a temperature range of -40°C to +100°C. The component has a maximum DC current rating of 1 A and a maximum operating voltage of 300 VDC. Key electrical parameters include a DC resistance of 70 mΩ and an inductance value tested at 10 kHz. The physical dimensions are approximately 17.7 mm in length, 17.1 mm in depth, and 12.6 mm in height.
Feature Summary
- Current-compensated design for effective common-mode noise suppression
- Through-hole termination style for secure PCB integration
- Ferrite core construction for stable magnetic performance
Applications
- AC power input filtering for electronic equipment
- EMI suppression in low-current power circuits
- Signal integrity protection in sensitive analog interfaces
Procurement Notes
Verify the specific suffix (e.g., -33M) against the required inductance value, as the base model number may represent a family. Confirm RoHS compliance status with the manufacturer or authorized distributor prior to ordering. Ensure the selected variant matches the required DC current rating and voltage specifications for the target application environment.
Selection Notes
Select this component when a compact, through-hole common mode choke is needed for currents up to 1 A. Consider the 70 mΩ DC resistance for power loss calculations. Verify that the 300 VDC rating meets the system's isolation requirements. Compare physical footprint constraints against the 17.7 x 17.1 x 12.6 mm dimensions.
Part Context
The RN142-1-02 belongs to Schaffner's RN series of current-compensated chokes. This series is engineered for EMC/RFI suppression in AC power lines. The part utilizes a horizontal PCB mount configuration, distinguishing it from vertical variants. It is manufactured by TE Connectivity / Schaffner, a recognized provider of electromagnetic interference filters.
Replacement Considerations
RN142-1-02-33M is a documented variant with specified inductance. Verify pin compatibility and inductance tolerance before substitution. Other RN series parts may share mechanical footprints but differ in current ratings.
