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Product Detailed Parameters
- Description：CMC 39MH 0.4A TH
- Series：B82721
- Mfr：EPCOS - TDK Electronics
- Package：Tray
- Filter Type：-
- Number of Lines：-
- Current Rating (Max)：-
- DC Resistance (DCR) (Max)：-
- Voltage Rating - DC：-
- Voltage Rating - AC：-
- Operating Temperature：-
- Ratings：-
- Approval Agency：-
- Features：-
- Mounting Type：Through Hole
- Size / Dimension：0.717" L x 0.520" W (18.20mm x 13.20mm)
- Height (Max)：0.823" (20.90mm)
- Package / Case：Vertical, 4 PC Pin
- Inductance @ Frequency：-
- Impedance @ Frequency：-
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Overview
The B82721K2401N025 is a current-compensated ring core double choke manufactured by EPCOS (TDK Electronics). It features a ferrite core and radial termination style. The component has an inductance of 27 mH with a tolerance of 30%. It supports a maximum DC current of 400 mA and has a maximum DC resistance of 1.7 Ohms. The operating temperature range spans from -40 °C to +125 °C. Physical dimensions are 18.2 mm in length, 13.2 mm in width, and 20.3 mm in height.
Feature Summary
- Current-compensated design for power line filtering applications
- Ferrite ring core construction for electromagnetic interference suppression
- Radial leaded termination for through-hole mounting
Applications
- Power supply input filtering
- Electromagnetic compatibility (EMC) circuits
- General purpose inductor applications
Procurement Notes
Verify the manufacturer designation as EPCOS or TDK Electronics, noting the brand transition history. Confirm the specific suffix N025 matches the required 27 mH inductance value and 400 mA current rating. Ensure the radial package dimensions align with the target PCB layout constraints.
Selection Notes
Select this component for applications requiring common mode noise suppression on power lines. The 27 mH inductance provides effective filtering at relevant frequencies. Verify that the 400 mA current rating meets the circuit's maximum load requirements without saturation. Check thermal performance within the specified -40 °C to +125 °C operating range.
Part Context
This part belongs to the B82721 series of current-compensated ring core chokes. These components are designed for AC voltage ratings up to 250 V. The series offers various inductance values and current ratings to suit different power line filtering needs across industrial and consumer electronics.
Replacement Considerations
Check for equivalents within the B82721A/J/K series from TDK Electronics. Verify pinout compatibility and electrical parameters such as inductance and current rating before substitution.
