The QSB-40-01 is an EMI Shield made of high-grade steel (spring V2a) with 0.2 to 0.3mm thickness and is for use with the QLM sleeves and 40mm QSB series fans. The filter guard EMI-shield sheet is required to avoid intake of the filter into the fan should there be only one large air intake opening. It also protects against EMI/RFI transmissions if needed. The EMI filter shield can be mounted on the inside or the outside of the panel housing.
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