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Product Detailed Parameters
- Description：CMC 500MA 4LN 250 OHM TH
- Series：ST
- Mfr：KEMET
- Package：Tray
- Filter Type：-
- Number of Lines：4
- Current Rating (Max)：500mA
- DC Resistance (DCR) (Max)：100mOhm
- Voltage Rating - DC：50V
- Voltage Rating - AC：-
- Operating Temperature：-20°C ~ 75°C
- Ratings：-
- Approval Agency：-
- Features：-
- Mounting Type：Through Hole
- Size / Dimension：0.512" L x 0.512" W (13.00mm x 13.00mm)
- Height (Max)：0.433" (11.00mm)
- Package / Case：Horizontal, 8 PC Pin
- Inductance @ Frequency：-
- Impedance @ Frequency：250 Ohms @ 10 MHz
- Qualification：-
- Grade：-
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Overview
The KEMET ST-204A1 is a four-line common mode choke designed for through-hole mounting. It provides an impedance of 250 ohms at 10 MHz and supports a maximum DC current of 500 mA with a maximum DC resistance of 100 milliohms. The component operates within a temperature range of -20°C to +75°C and features a radial leaded package with dimensions of 13mm x 13mm x 11mm.
Feature Summary
- Four-line configuration for multi-conductor noise suppression
- Radial through-hole termination for standard PCB assembly
- Low DC resistance to minimize power loss in signal lines
Applications
- Common mode noise filtering in data communication interfaces
- EMI suppression for multi-wire cable assemblies
- Signal integrity protection in industrial control systems
Procurement Notes
Verify the specific impedance value against project requirements, as datasheets may list variations such as 600 ohms or 250 ohms depending on the exact suffix or revision. Confirm that the 500 mA current rating aligns with the operational load. Ensure the through-hole footprint matches the PCB design constraints before finalizing procurement orders.
Selection Notes
Select this component when multi-line common mode noise reduction is required for low-current applications. The 500 mA rating suits signal-level circuits rather than high-power transmission. Verify that the 250 ohm impedance at 10 MHz meets the target frequency attenuation needs. Ensure the through-hole form factor is compatible with the manufacturing process.
Part Context
The ST-204A1 belongs to the KEMET ST series of DC line filters. This series focuses on common mode chokes for protecting sensitive electronics from electromagnetic interference. The part utilizes a toroidal core structure enclosed in a compact housing, offering a balance between performance and space efficiency for dense circuit board layouts.
Replacement Considerations
The ST-204A4 is a related variant within the same series but offers different impedance characteristics (600 ohms). Verify electrical compatibility before substitution. No other direct cross-references are confirmed in public documentation.
