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EMI Input Filter Modules

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Active EMI filter modules

The QPI family of active EMI filters provides conducted common-mode (CM) and differential-mode (DM) attenuation from 150kHz to 30MHz (CISPR22 range). The proprietary active-filtering circuit provides superior attenuation at low frequencies intended to support EN Class B limits, including PICMG 3.0 for ATCA boards. In comparison to passive solutions, the use of active filtering reduces the volume of the common-mode choke, providing a low-profile, surface-mount device. Smaller size saves valuable board real estate and the reduced height enhances airflow in blade applications. The MQPI-18 attenuates conducted common-mode (CM) and differential-mode (DM) noise for 28V input MIL PRMs to comply with MIL-STD-461F EMI requirements for conducted noise measurements. The filter operates within the full input operating range of a 28V MIL PRM and supports 7A loads up to 85°C (TA) without de-rating.

Data Sheets  

Features and Benefits

Features and benefits

Provides conducted common-mode

Provides conducted common-mode (CM) and differential-mode (DM) attenuation from 150kHz to 30MHz (CISPR22 range) 

Optimized for applications that require EN55022 Class B limits 

Optimized for applications that require EN55022 Class B limits 

Nominal input voltages 

12, 24 & 48V nominal input voltages 

Saves up to 50% board space vs. standard filters 

Saves up to 50% board space vs. standard filters 

Select a QPI

              0 Products
              Part Number Input (V) Current (A) Test Freq. (kHz) CM Attenuation (dB) HIPot (V) Package (mm) Add to cart / view details
              QPI-21LZ Part Number: QPI-21LZ Input (V): 30 – 80 Current (A): 14 Test Freq. (kHz): 250 CM Attenuation (dB): 45 HIPot (V): 1,500 Package (mm): LGA Add to Cart
              QPI-21LZ-01 Part Number: QPI-21LZ-01 Input (V): 30 – 80 Current (A): 14 Test Freq. (kHz): 250 CM Attenuation (dB): 45 HIPot (V): 1,500 Package (mm): Open Frame Add to Cart
              QPI-12LZ Part Number: QPI-12LZ Input (V): 5.0 – 80 Current (A): 7 Test Freq. (kHz): 1,000 CM Attenuation (dB): 40 HIPot (V): 1,500 Package (mm): LGA Add to Cart
              QPI-12LZ-01 Part Number: QPI-12LZ-01 Input (V): 5.0 – 80 Current (A): 7 Test Freq. (kHz): 1,000 CM Attenuation (dB): 40 HIPot (V): 1,500 Package (mm): Open Frame Add to Cart
              QPI-11LZ Part Number: QPI-11LZ Input (V): 5.0 – 50 Current (A): 7 Test Freq. (kHz): 1,000 CM Attenuation (dB): 60 HIPot (V): 707 Package (mm): LGA Add to Cart
              QPI-11LZ-01 Part Number: QPI-11LZ-01 Input (V): 5.0 – 50 Current (A): 7 Test Freq. (kHz): 1,000 CM Attenuation (dB): 60 HIPot (V): 707 Package (mm): Open Frame Add to Cart
              QPI-6LZ Part Number: QPI-6LZ Input (V): 30 – 80 Current (A): 14 Test Freq. (kHz): 250 CM Attenuation (dB): 40 HIPot (V): 1,500 Package (mm): LGA Add to Cart
              QPI-6LZ-01 Part Number: QPI-6LZ-01 Input (V): 30 – 80 Current (A): 14 Test Freq. (kHz): 250 CM Attenuation (dB): 40 HIPot (V): 1,500 Package (mm): Open Frame Add to Cart
              QPI-5LZ Part Number: QPI-5LZ Input (V): 10 – 40 Current (A): 14 Test Freq. (kHz): 250 CM Attenuation (dB): 60 HIPot (V): 707 Package (mm): LGA Add to Cart
              QPI-5LZ-01 Part Number: QPI-5LZ-01 Input (V): 10 – 40 Current (A): 14 Test Freq. (kHz): 250 CM Attenuation (dB): 60 HIPot (V): 707 Package (mm): Open Frame Add to Cart
              QPI-3LZ Part Number: QPI-3LZ Input (V): 10 – 40 Current (A): 7 Test Freq. (kHz): 250 CM Attenuation (dB): 65 HIPot (V): 707 Package (mm): LGA Add to Cart
              QPI-3LZ-01 Part Number: QPI-3LZ-01 Input (V): 10 – 40 Current (A): 7 Test Freq. (kHz): 250 CM Attenuation (dB): 65 HIPot (V): 707 Package (mm): Open Frame Add to Cart
              MQPI-18LP Part Number: MQPI-18LP Input (V): 5.0 – 50 Current (A): 7 Test Freq. (kHz): 1,000 CM Attenuation (dB): 45 HIPot (V): 1,500 Package (mm): LGA Add to Cart
              MQPI-18LP-01 Part Number: MQPI-18LP-01 Input (V): 5.0 – 50 Current (A): 7 Test Freq. (kHz): 1,000 CM Attenuation (dB): 45 HIPot (V): 1,500 Package (mm): Open Frame Add to Cart
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              Resources

              Resources for the design engineer


              QPI-3LZ data sheet
              7 Amp Active EMI Filter for 24Vdc Bus

              QPI-5LZ data sheet
              14 Amp Active EMI Filter for 24Vdc Bus

              QPI-6LZ data sheet
              14 Amp Active EMI Filter for 48Vdc Bus

              QPI-8LZ data sheet
              6 Amp Active EMI Filter, with integrated Hot-Swap, for 48Vdc Bus

              QPI-10LZ data sheet
              6 Amp EMI Filter, with integrated Hot-Swap for 48V VI Chip products (Not recommended for new designs)

              QPI-11LZ data sheet
              7 Amp VI Chip products

              QPI-12LZ data sheet
              7 Amp VI Chip EMI Filter for 48V VI Chip products

              QPI-21LZ data sheet
              14 A Active EMI Filter SiP for 48Vdc Bus

              MQPI-18 data sheet
              7 Amp Active EMI Filter for 24Vdc Bus

              • QPI-3 LGA Package
                STEP
              • QPI-5 LGA Package
                STEP
              • QPI-11 LGA Package
                STEP
              • QPI-12 LGA Package
                STEP
              • MQPI-18 LGA Package
                STEP

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