TFI 20 TRACO Power

RIA 12 Filter TFI 20, 20 Watt Clamps over voltage transients (up to 385 VDC) at 168 VDC Universal use: Can be used with any DC/DC converter Complies with RIA12, NF F 01-510 Surge susceptibilities Wide input voltage range: 43 160 VDC Brownout voltage 36 VDC min. Operating temperature range -40 to +95C The new TFI 20 is a surge filter which comes in a compact DIP-24 plastic package. Placed in front of any DC/DC converter the TFI clamps momentary over-voltage transients to a 3-year product warranty safe value in order to protect the DC/DC converter from being damaged. During normal operation the output voltage follows the input voltage (Vout = Vin 2 VDC typ.) up to the point of 168 VDC where the voltage is actively clamped. Whereas the transients defined within the EN 50155 (up to 154 VDC) are covered by the wide input range of dedicated railway converters the TFI handles the stricter definition laid-out in the RIA12 standard which allows transients of up to 20ms at 385 VDC. This level of protection is specifically required in railway applications where high voltage transients are expected but can also be used for 72, 96 and 110 VDC battery systems in railway applications. Models Order code Input voltage Power max. 43 160 VDC TFI 20 20 W Models www.tracopower.com Page 1 of 4 TFI 20, 20 Watt Input Specifications Start-up Voltage 30 VDC max. Transient Voltage 1 s max. 165 VDC max. 100 ms max. 176 VDC max. 20 ms max. 385 VDC max. Brownout 36 VDC min. Output Specifications Output Voltage Vin - 2 VDC typ. / Vin - 1 VDC max. Clamping Voltage Input Transient Voltage Mode 168 VDC typ. General Specifications Standards RIA 12 Surge Susceptibility NF F 01-510 Surge Susceptibility Case Material Non-conductive black plastic Base Material Non-conductive black plastic Potting Material Silicone (UL94 V-0) Weight 14 g Temperature ranges Operating (without derating) 40C to +95C Case Temperature +105C max. Storage Temperature 55C to +125C Relative Humidity 95% max. (non condensing) Thermal Shock MIL-STD-810F Vibration MIL-STD-810F Characeristic Curves Transient Function All specifications valid at nominal input voltage, full load and +25C after warm-up time unless otherwise stated. www.tracopower.com Page 2 of 4