Engineered to provide reliable noise filtering in space-constrained
applications, the SF1210F-3W series offers a selection of
high-performance common mode filters in a compact footprint. Utilizing wire wound chokes construction, this series delivers essential EMI suppression components functionality with common mode impedance options of 160Ω, 240Ω,
and 500Ω at 100MHz. Designed for ease of integration, it includes
recommended PCB layout and stencil patterns to ensure optimal
performance and manufacturability. Fully compliant with RoHS and
halogen-free standards, it operates reliably across a -40°C to
+125°C temperature range.
Features:
Common Mode Impedance (@100MHz): 160Ω, 240Ω, or 500Ω (±25%, model dependent)
DC Resistance (DCR): As low as 0.21Ω (max)
Rated Current: Up to 500mA (max)
Rated Voltage: 50 Vdc (max)
Withstand Voltage: 125 Vdc (max)
Insulation Resistance: 10 MΩ (min)
Construction: Wire wound type for robust high-frequency performance
Design Support: Includes recommended PCB land pattern and solder paste stencil
aperture
Compliance: 100% Lead-free, Halogen-free, RoHS compliant
Operating Temperature: -40°C to +125°C (including self-temperature rise)
Applications
EMI filtering for high-speed differential data lines (e.g., USB
3.0/3.1, HDMI, DisplayPort, MIPI)
Noise suppression in portable and wearable consumer electronics
Signal integrity enhancement in communication modules (Wi-Fi,
Bluetooth)
Power line filtering in low-current digital circuits and sensors
Board-level EMC solutions in networking equipment and set-top boxes
FAQ
Q: How do I choose between the 160Ω, 240Ω, and 500Ω impedance
models?
A: The choice depends on the frequency and amplitude of the
common-mode noise you need to suppress. Higher impedance provides
greater attenuation at the test frequency (100MHz). Consider your
specific EMI profile and compliance requirements. The 500Ω model
offers the strongest suppression at 100MHz.
Q: Why are the recommended PCB layout and stencil patterns
important?
A: These recommendations help optimize the filter's high-frequency
performance by minimizing parasitic effects and ensure reliable,
consistent solder joints during surface-mount assembly, reducing
manufacturing defects.
Q: Can this series be used for power line filtering?
A: Yes, but note the rated current (max 500mA). It is suitable for
filtering noise on lower-current power rails or signal lines with
DC bias. For higher current power lines, ensure the selected
model's current rating is not exceeded.
Q: What is the benefit of the wire-wound construction in this
context?
A: Wire-wound construction typically allows for higher common-mode
impedance and better performance at high frequencies compared to
some multilayer ceramic filters, making it more effective for
suppressing EMI in fast digital interfaces.
