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SFMC28-461F Datasheet(PDF) 1 Page - Interpoint Corporation Company |
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SFMC28-461F Datasheet(HTML) 1 Page - Interpoint Corporation Company |
1 / 11 page Description The SFMC28-461™ EMI filters provide an off-the-shelf filtering solution compliant to MIL-PRF-38534, Class H or Class K, for use in your space system. SFMC28-461 filters reduce the input line reflected ripple current of our switching DC/DC converters. Use an SFMC28-461 filter with our SMTR, SMHF and SMSA series of DC/DC converters to meet MIL-STD-461C levels of conducted emission (CE01, CE03). The SFMC filters are designed exclusively with passive components providing maximum tolerance for space environments. Screening The SFMC28-461 EMI filters offer environmental screening levels to Space Prototype (O), Class H, or Class K requirements. Radiation tolerant to Radiation Hardness Assurance (RHA) levels of “-” (O) or “H”, per MIL-PRF-38534. Interpoint model numbers use an “O” in the RHA designator position to indicate the “-” (dash) Radiation Hardness Assurance level of MIL-PRF-38534, which is defined as “no RHA”. See Screening Tables 1, 2 and 3 for more information. ripple reduction The SFMC28-461 EMI filter, when used with Interpoint’s converters, reduces reflected input ripple current by a minimum of 55 dB at 500 kHz and 60 dB at 1 MHz. The filter and converter combination performance exceeds the CEO3 requirements of MIL-STD-461C. inSertion loSS The maximum DC insertion loss for the SFMC28-461 filter (at a load of 22 watts) represents a power loss of less than 2% at nominal input voltage. Filter deSign SFMC28-461 filters incorporate thick-film hybrid technology and use only high quality ceramic capacitors for reliable high temper- ature operation. All SFMC28-461 filters are built to the same assembly drawing regardless of environmental screening or radiation tolerance level. Filters designated level OO, indicating standard environ- mental screening, are electrically comparable to filters designated level KH, the highest environmental screening level. This ensures consistency between your prototype or test system using level OO filters and your flight system using filters with higher levels of environmental screening and radiation tolerance. Element evalu- ation (screening at the component level) of Class H or Class K filters ensures even greater reliability. Refer to Table 1, 2 and 3 for more information. operating temperature The filter operates at full load over the temperature range of -55°C to +125°C case. Above +125°C, the current must be derated as specified on page two. packaging SFMC28-461 EMI filters are encased in high-reliability, hermet- ically-sealed metal packages and weigh just 48 grams. A small footprint of 2.100 Inches (53.34 mm) by 1.115 inches (28.32 mm) by 0.400 inches (10.16 mm) minimizes the board area needed for the filter. input Voltage and current Input (V) 28 Current (A) 2.7 Features Attenuation 60 dB at 500 kHz, typical Operating temperature -55° to +125°C • Qualified to MIL-PRF-38534 Class H and K • Passive components used for maximum tolerance • in space environments Nominal 28 V input, 0 V to 50 V operation • Up to 2.7 A throughput current • Compliant to MIL-STD-461C CE-03 • Compatible with MIL-STD-704 B-E 28 VDC power bus • Crane Aerospace & Electronics Power Solutions sFMc28-461 eMi input Filters Crane Aerospace & Electronics Electronics Group (Interpoint Brand) POBox97005•RedmondWA98073-9705 425.882.3100•power@crane-eg.com www.interpoint.com Page 1 of 11 SFMC28-461 Rev E - 20100628 28 Volt input – 2.7 aMp |
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