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Product Detailed Parameters
- Description：CMC 47MH 250MA 2LN TH
- Series：B82791
- Mfr：EPCOS - TDK Electronics
- Package：Tape & Reel (TR)
- Filter Type：Power Line
- Number of Lines：2
- Current Rating (Max)：250mA
- DC Resistance (DCR) (Max)：2.4Ohm (Typ)
- Voltage Rating - DC：-
- Voltage Rating - AC：250V
- Operating Temperature：-40°C ~ 125°C
- Ratings：-
- Approval Agency：ENEC, UR, VDE
- Features：-
- Mounting Type：Through Hole
- Size / Dimension：0.689" L x 0.689" W (17.50mm x 17.50mm)
- Height (Max)：0.315" (8.00mm)
- Package / Case：Horizontal, 4 PC Pin
- Inductance @ Frequency：47 mH @ 10 kHz
- Impedance @ Frequency：-
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Overview
The B82791G2251N20 is a through-hole common mode choke manufactured by EPCOS - TDK Electronics. It features a horizontal package with four PC pins and a rectangular ferrite core construction. The component has a nominal inductance of 47 mH and a rated current of 250 mA. It supports an AC voltage rating of 250 V at 50/60 Hz. The maximum operating temperature is 125 °C, and the minimum operating temperature is -40 °C. The device measures 17.5 mm in length, 8 mm in height, and utilizes 0.6 mm diameter leads.
Feature Summary
- Provides electromagnetic interference suppression for power lines
- Utilizes a plastic housing with UL 94 V-0 flame retardant rating
- Designed for high-frequency applications without derating requirements
Applications
- Power line filtering in electronic equipment
- Suppression of common-mode noise in ultra-high frequency circuits
- Protection of electronic circuits from electromagnetic interference
Procurement Notes
Verify the complete part number including suffixes to ensure correct pin configuration and tolerance specifications. Confirm that the 250 mA current rating meets the specific circuit requirements. Check for RoHS compliance status if required by regulatory standards. Ensure the through-hole mounting style matches the PCB design constraints.
Selection Notes
Select this component when a high inductance value of 47 mH is required for effective low-frequency noise attenuation. The 250 mA current rating suits low-power signal or control line applications rather than high-current power stages. The through-hole format is appropriate for boards requiring robust mechanical anchoring. Verify that the 250 V AC voltage rating aligns with the system's operational limits.
Part Context
This component belongs to the B82791 series of common mode chokes designed for power line filtering. The series offers various inductance values and current ratings to accommodate different electromagnetic compatibility needs. EPCOS - TDK Electronics produces these components to ensure stable operation and protect electronic circuits from faults caused by interference.
FAQ
What is the DC resistance of the B82791G2251N20?
Specific DC resistance values are not provided in the available documentation for this exact part number.
Is the B82791G2251N20 suitable for high-current power supplies?
No, the rated current is 250 mA, which is intended for low-power signal or control lines rather than high-current power stages.
