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Product Detailed Parameters
- Description：CMC 3.3MH 1.2A 2LN TH
- Series：EH
- Mfr：Schaffner EMC Inc.
- Package：Tray
- Filter Type：Power Line
- Number of Lines：2
- Current Rating (Max)：1.2A
- DC Resistance (DCR) (Max)：127mOhm (Typ)
- Voltage Rating - DC：-
- Voltage Rating - AC：250V
- Operating Temperature：-25°C ~ 100°C
- Ratings：-
- Approval Agency：-
- Features：-
- Mounting Type：Through Hole
- Size / Dimension：0.827" L x 0.827" W (21.00mm x 21.00mm)
- Height (Max)：0.740" (18.80mm)
- Package / Case：Horizontal, 4 PC Pin
- Inductance @ Frequency：3.3 mH @ 400 Hz
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Overview
The EH20-1.2-02-3M3 is a common mode choke from the Schaffner EV/EH series, designed for electromagnetic interference suppression. It features a ferrite core and through-hole termination for PCB mounting. The component has an inductance of 3.3 mH at a test frequency of 10 kHz. It supports a maximum DC current of 1.2 A with a maximum DC resistance of 70 mOhms. The operating temperature range spans from -40°C to +100°C. Physical dimensions are approximately 18 mm x 12.5 mm x 20 mm.
Feature Summary
- Provides common mode noise suppression for differential signal lines
- Utilizes a ferrite core for effective high-frequency attenuation
- Designed for vertical PCB mounting via through-hole technology
Applications
- CAT scanners
- Defibrillators
- Laboratory equipment
- X-ray equipment
Procurement Notes
Verify the specific suffix '3M3' against the manufacturer's latest datasheet to confirm terminal configuration and lead form. Ensure the selected variant matches the required 1.2 A current rating and 3.3 mH inductance for the target circuit. Confirm RoHS compliance status if restricted substances are a constraint for the assembly process.
Selection Notes
Select this component when vertical mounting space is limited on the PCB layout. The 1.2 A rating suits low-power medical or laboratory instrumentation circuits. Verify that the 3.3 mH impedance profile aligns with the noise frequencies present in the specific application environment. Check clearance requirements around the 20 mm height dimension.
Part Context
This part belongs to the Schaffner EV/EH series of RFI suppression chokes. These components are engineered specifically for medical and sensitive electronic equipment where compact size and reliable noise filtering are critical. The series offers various inductance and current combinations to suit different circuit protection needs.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-referencing requires matching inductance, current rating, and physical footprint specifications.
