Datasheet

ManualsBrandsTraco Power ManualsBoard Mounted DC / DC ConvertersSurge Filter 43 ... 160VDC 20W RIA 12

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RIA 12 Filter TFI 20, 20 Watt

Models

Order code Input voltage Power max.

TFI 20

43 – 160 VDC

20 W

Models

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

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.

• 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 +95°C

• 3-year product warranty

Summary of content (4 pages)

PAGE 1
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 +95°C • 3-year product warranty The new TFI 20 is a surge filter which comes in a compact DIP-24 plastic package.
PAGE 2
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.
PAGE 3
TFI 20, 20 Watt Possible Application + +Vin Input EMS Filter* EMI Filter* RIA 12 Filter +Vout Cout DC/DC –Vin – Load –Vout Schematic for typical application 385 V max. Surge Voltage Clamping Voltage + Input Input Surge Voltage +Vin RIA 12 Filter – +Vout DC/DC –Vin Load 168 V typ. Clamping Voltage –Vout 20 ms max. Input Surge Voltage vs. Clamping Voltage The RIA 12 Filter clamps over-voltage to a safe value in order to protect the power module from damaging.
PAGE 4
TFI 20, 20 Watt 31.8 (1.25) 2 10 11 12 (0.10) (2 x 0.10) +Vout 11 +Vout 12 +Vout 13 – Vout 2.54 (0.10) 20.32 (0.8) 14 13 2.0 14 – Vout 23 – Vin 24 – Vin Dimensions in mm (Inch) Tolerances: x.x ±0.5 (±0.02) x.xx ±0.25 (±0.01) Pin pitch tolerance ±0.25 (±0.01) Pin dimesion tolerance ±0.10 (±0.004) (0.08) (0.15) 3.8 10.2 (0.40) (0.10) +Vin +Vin ø 0.50 (0.020) 2.54 1 2 Bottom View 24 23 Function 10 20.3 (0.80) 2.54 Pin 2 x 2.54 15.22 (0.60) 1 Pin-Out (0.10) 2.