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Product Detailed Parameters
- Description：CMC 34.2MH 400MA 2LN TH
- Series：SS
- Mfr：KEMET
- Package：Tray
- Filter Type：Power Line
- Number of Lines：2
- Current Rating (Max)：400mA
- DC Resistance (DCR) (Max)：2.372Ohm
- Voltage Rating - DC：-
- Voltage Rating - AC：500V
- Operating Temperature：-40°C ~ 120°C
- Ratings：-
- Approval Agency：-
- Features：-
- Mounting Type：Through Hole
- Size / Dimension：0.811" L x 0.661" W (20.60mm x 16.80mm)
- Height (Max)：1.004" (25.50mm)
- Package / Case：Vertical, 4 PC Pin
- Inductance @ Frequency：34.2 mH @ 1 kHz
- Impedance @ Frequency：-
- Qualification：-
- Grade：-
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Overview
The KEMET SS21VB-R040342 is a through-hole common mode choke belonging to the SS21VB series. It features an inductance of 34.2 mH and a DC current rating of 400 mA. The component operates within a temperature range of -40°C to +120°C and has a maximum AC voltage rating of 500 V ac. Its DC resistance is specified at 2.372 Ohms, with an additional impedance value of 5.90 Ohms noted in some documentation.
Feature Summary
- Provides common mode noise suppression for AC line applications
- Utilizes a through-hole bobbin construction for secure mounting
- Designed for high-temperature operation up to 120°C
Applications
- AC line filtering in power supplies
- EMI/RFI suppression circuits
- General electronic equipment requiring common mode chokes
Procurement Notes
Verify the specific datasheet version for the exact DC resistance value, as sources cite both 2.372 Ohms and 5.90 Ohms. Confirm that the 400 mA current rating aligns with your thermal design requirements. Ensure the through-hole package dimensions fit your PCB layout constraints before finalizing procurement.
Selection Notes
Select this component when a 34.2 mH inductance is required for common mode noise reduction in AC lines. The 400 mA rating suits low-to-medium current applications. Consider the 120°C operating limit if ambient temperatures are high. Compare against other SS21VB variants if different inductance or current values are needed.
Part Context
This part is part of KEMET's SS21VB series of common mode chokes. These components are designed for EMI suppression in AC power lines. The series offers various inductance and current ratings to suit different filtering needs while maintaining a consistent through-hole bobbin form factor for reliable integration into power supply designs.
Replacement Considerations
Check for direct substitutes within the SS21VB series with matching 34.2 mH inductance and 400 mA rating. Verify pin compatibility and physical dimensions for any cross-brand replacements. Ensure the alternative component meets the same 500 V ac and 120°C temperature specifications.
