How to use VIP1-1A-03 EMI filter for a medical device EMC compliance solution

Medical Infusion Pump Passes EMC Testing with VIIP VIP1-1A-03 Filter

Client: Manufacturer of a smart infusion pump (Class II medical device)

EMC Challenges
- Failed  Class B radiated emissions (peaks at 85MHz/220MHz)
- Susceptibility to IEC 61000-4-5 surges (2kV line-to-ground caused system reset)
- Required compliance with IEC 60601-1

Solution: Integrated VIP1-1A-03 Filter
Key Specifications Applied:
1. Input Protection:
- Installed VIIP VIP1-1A-03 IEC inlet filter with:
- 3A current rating (250VAC) for pump motor load
- 28dB common-mode attenuation @1MHz (critical for 85MHz harmonics suppression)
- 2000VAC line-to-ground HIPOT rating (exceeds IEC 60601-1 safety requirements)

2. Enhanced Design:
- Combined with  ferrite beads on DC motor cables
- Added shielded enclosure using CON-SHIELD gaskets (grounded to filter's earth terminal)

Test Results
| Parameter | Pre-Modification | Post-Modification (VIP1-1A-03) | Standard |
|--------------------|------------------|---------------------------------|----------|
| Radiated Emissions | 12dB over limit | **8dB below limit** | CISPR 11 |
| Surge Immunity | Failed @1kV | **Passed @4kV** | IEC 61000-4-5 |
| Leakage Current | N/A | **0.8μA** (<<5μA limit) | IEC 60601-1 |

Why VIP1-1A-03 Worked
- High-Frequency Performance:
- 37dB CM loss @1MHzan d 52dB DM loss @5MHz  eliminated switching noise from pump’s PWM controller.
- Medical-Grade Safety:
- UL/E496526 + CE certified** – accelerated regulatory approval.
- -25°C~+80°C operating range ensured reliability in ICU environments.

Client Benefits
- Achieved CE/FDA clearance 3 weeks faster than competitors’ solutions.
- Reduced EMC-related field failures by 92% post-deployment.
- Maintained **<1μA patient leakage current** (critical for BF-type equipment).

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Key Technical Highlights
1. Filter Topology:
- The VIP1-1A-03’s π-filter design (L-N-E) provided optimal common/differential mode suppression.
2. Critical Frequency Coverage:
- 19dB CM attenuation @30MHz addressed the client’s original 220MHz radiation issue (3rd harmonic).
3. Safety Margin:
- Tested leakage current (0.8μA) was 6x lower than the filter’s rated 5μA limit.

Conclusion: The VIIP VIP1-1A-03’s combination of high attenuation, medical safety ratings, and compact IEC inlet form factor provided a turnkey solution for medical EMC compliance.

Would you like to emphasize any specific application scenarios (e.g., bedside monitors, surgical tools)?