Engineered for effective electromagnetic interference (EMI) filtering in modern electronic circuits, the SQD4520 series of surface mount chokes provides robust EMI suppression chokes performance in a compact, low-profile package. Utilizing a durable ferrite core bobbin construction, these common mode chokes offer high impedance at 100MHz, effectively attenuating unwanted common-mode noise while allowing differential signals to pass with minimal loss. Designed for high-current applications, they combine excellent frequency performance with superior mechanical strength and solderability, making them a reliable and cost-effective solution for meeting EMC compliance in a wide range of power and data line interfaces.

Features:

• Impedance @100MHz: 60Ω Min to 1400Ω Typ (model dependent)

• DC Resistance (DCR): 35mΩ to 80mΩ Max

• Rated Current: Up to 3.2A Max

• Rated Voltage: 50V Max

• Compact SMD package with robust mechanical construction

• Excellent high-frequency performance and solderability

• Operating Temperature: -40°C to +125°C

Applications

• EMI filtering in DC/DC and AC/DC power converters

• Noise suppression for video cameras and LCD televisions

• Signal integrity enhancement in communication and network systems

• Automotive electronics for conducted noise reduction

• Data line filtering in hard disk drives (HDDs) and storage devices

FAQ
Q: What is the primary function of a common mode choke?
A: Its primary function is to suppress common-mode electromagnetic interference (EMI) by providing high impedance to unwanted noise currents flowing in the same direction on a pair of lines, while offering low impedance to the desired differential signal.

Q: How do I select the right impedance value for my application?
A: Selection depends on the frequency spectrum of the noise you need to suppress. The SQD4520 series offers a range from 60Ω to 1400Ω (Typ @100MHz). Higher impedance provides greater attenuation at the test frequency. Refer to your circuit's noise profile and EMC standards.

Q: What does the rated current parameter signify?
A: The rated current is the maximum continuous current the choke can handle without exceeding its thermal or performance specifications. It's crucial to ensure the choke's current rating meets or exceeds the normal operating current of your circuit.

Q: Are these chokes suitable for automotive applications?
A: Yes, with an operating temperature range of -40°C to +125°C and robust construction, they are well-suited for various automotive electronic systems where reliable EMI filtering is required.