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Each 1U high 19” rack can accommodate up to four power supplies to deliver 13300 W of bulk power or operate as a hot-swap redundant system. The internal ORing MOSFETs and current share function enable hot-swap operation and up to 12 HFE3500 units (three racks) can be connected in parallel. Applications include factory automation, Automatic Test Equipment (ATE), additive manufacturing, industrial printing, RF transmission, base stations and servers.
24 V and 48 V models are available with adjustment ranges of 24.0 - 27.6 and 48.0 - 55.2 V. Communication with the power supplies is possible through the built-in isolated PMBus™ (I2C) interface. AC fail, DC good, remote output adjustment, remote on/off and a 5V or 12V auxiliary output are fitted as standard. There is an option for dual ac input fuses.
The HFE3500 power supplies have an input range of 85 264 Vac with power derating to 2016 W below 170 Vac. The HFE3500-S1U/TB rack is fitted with input screw terminal blocks for a rugged connection. The power supply measures 107 x 40.1 x 330mm, and the rack 444.5 x 43.7 x 428mm. Cooling is provided by two internal, variable-speed fans. The HFE3500 modules’ efficiency is 94 % at 230 Vac and 92 % at 115 Vac input.
Safety certifications include IEC/UL/CSA/EN62368-1 and EN/UL61010-1; the series also carries the CE and UKCA marking for the Low Voltage, EMC and RoHS Directives. The units comply with EN55011 Class B, EN55032 Class B, FCC Title 47, Chapter 1, Part 15.107 - Class B, VCCI Class B for conducted EMI, plus EN55011 Class A, EN55032 Class A, FCC Title 47, Chapter 1, Part 15.109 - Class A, and VCCI Class A for radiated EMI. The HFE series’ input to output isolation is 3 kVac, the input to ground 2 kVac, and output to ground 500 Vdc. The models are backed by a five-year warranty.
Main applications
• Factory automation, ATE, additive manufacturing, industrial printing, RF transmission, base stations, and servers
Main features and benefits
• Internal ORing MOSFET and current share;
• Up to 13300 W in 1U Rack;
• PMBus (I2C) as standard;
• External Output Voltage Adjustment.
About TDK Corporation
TDK Corporation (tdk.com) is a world leader in electronic solutions for the smart society based in Tokyo, Japan. Built on a foundation of material sciences mastery, TDK welcomes societal transformation by resolutely remaining at the forefront of technological evolution. It was established in 1935 to commercialize ferrite, a key material in electronic and magnetic products. TDK’s comprehensive, innovation-driven portfolio features passive components such as ceramic, aluminum electrolytic and film capacitors, as well as magnetics, high-frequency, and piezo and protection devices. The product spectrum also includes sensors and sensor systems such as temperature and pressure, magnetic, and MEMS sensors. In addition, TDK provides power supplies and energy devices, magnetic heads, software and more. These products are marketed under the product brands TDK, EPCOS, InvenSense, Micronas, Tronics, and TDK-Lambda. TDK focuses on demanding markets in automotive, industrial and consumer electronics, and information and communication technology. The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America. In fiscal 2025, TDK posted total sales of USD 14.4 billion and employed about 10,5000 people worldwide.
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