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All specifications valid at nominal input voltage, full load and +25°C after warm-up time unless otherwise stated.
DC/DC Converters
TRA 1 Series 1 Watt
Input Specifications
Input current no load / full load 5 Vin models 30 mA / 240 mA typ.
12 Vin models 12 mA / 100 mA typ.
24 Vin models 11 mA / 50 mA typ.
Surge voltage (1 s max.) 5 Vin models 9 V max.
12 Vin models 18 V max.
24 Vin models 30 V max.
Reflected input ripple current 12 Vin models 4 mA typ.
other models 8 mA typ.
Input filter internal capacitor
Reverse polarity input current 0.3 A max.
Recommended input fuse (slow blow type) 5 Vin models: 500 mA
12 Vin models: 200 mA
24 Vin models: 100 mA
Output Specifications
Voltage balance (dual output models, balanced loads) 0.1 % typ. / 1 % max.
Regulation – Input variation (1 % change of Vin) 1.05 % typ. / 1.2 % max.
– Load variation see model table and graph 1 on page 3
Ripple and noise (20 MHz Bandwidth) 60 mVp-p max.
Temperature coefficient ±0.01 %/K typ. / ±0.02 %/K max.
Short circuit limited 0.5 s max.
Capacitive load single output models: 220 µF max.
dual output models: 100 µF max. (each output)
General Specifications
Temperature ranges – Operating –40°C to +95°C
– Case temperature +95°C max.
– Storage –50°C to +125°C
Derating 5 %/K above +85°C
Humidity (non condensing) 95 % rel H max.
Reliability, calculated MTBF (MIL-HDBK-217F, at +25°C, ground benign) >2’000’000 h
Isolation voltage (60 s) Input/Output 1‘000 VDC
Isolation capacitance Input/Output 60 pF typ. / 120 pF max.
Isolation resistance Input/Output >1‘000 MOhm
Switching frequency 50 to 120 kHz (frequency modulation)
Altitude during operation up to 5‘000 m approved
Safety standards IEC 60950-1:2005 (2nd edition) + Am 1:2009
EN 60950-1:2006 + Am 1:2010 + Am 11:2009
Safety approvals – CB scheme IEC 60950-1
– CSA certification UL 60950-1, CSA 60950-1-07
– Certification documents www.tracopower.com/overview/tra1
