1. What voltage, current and power does the EFIL-28 support?

The EFIL-28 operates from 9.5–36 Vdc and is rated for up to 200 W. Its maximum input-current rating is 20 A, but the 200 W limit must always be observed. At a nominal 28 Vdc input and 200 W, the current is approximately 7.2 A.

2. Which military EMC requirements does it support?

The filter is designed to meet the conducted-emissions requirements of MIL-STD-461E CE101 and CE102 when used with compatible Calex converters and the recommended circuit. Complete equipment still requires system-level EMC testing.

3. Can one EFIL-28 filter two DC-DC converters?

Yes. One module can filter up to two compatible Calex DC-DC converters, provided their combined input power does not exceed 200 W. Additional external capacitance is required when two converters are connected.

4. Does the EFIL-28 provide reverse-polarity protection?

Reverse polarity will not damage the EFIL-28 itself, but the filter does not protect downstream circuitry from a reversed supply. Suitable external protection or a converter with its own reverse-polarity protection is required.

5. What mounting and case options are available?

The standard EFIL-28 uses a half-brick package measuring 57.9 × 61 × 12.7 mm. The optional EFIL-28-T version increases the case height from 12.7 mm to approximately 14 mm. RoHS-compliant constructions are also available.

EFIL-28

The Calex EFIL-28 is a DC input EMI filter designed for 24 Vdc and 28 Vdc military, defence and avionics power systems. It operates from 9.5–36 Vdc, supports up to 200 W and provides a maximum input-current capability of 20 A, subject to the 200 W power limit. Its all-ceramic design delivers common-mode and differential-mode filtering with typical efficiency of 99% and a DC resistance of 5 mΩ. The half-brick module measures 57.9 × 61 × 12.7 mm and provides 700 Vdc isolation between its pins and baseplate. It can filter up to two compatible Calex DC-DC converters, provided their combined input power remains within 200 W and the specified external components are fitted. The EFIL-28 supports MIL-STD-461E CE101 and CE102 conducted-emissions requirements and carries a five-year warranty.

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Category: EMC Filters, PCB Mount

Brands: Calex

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Calex EFIL-28

The Calex EFIL-28 is a half-brick DC input EMI filter designed for 24 Vdc and 28 Vdc military power systems. It provides common-mode and differential-mode filtering to support MIL-STD-461E CE101 and CE102 conducted-emissions compliance for one or two Calex DC-DC converters.