THM 3 Series, 3 Watt
Input Specifications
Input current no load
5 Vin models: 20 mA typ.
12 Vin models: 10 mA typ.
24 Vin models: 6 mA typ.
48 Vin models: 4 mA typ.
Surge voltage (3 s max.)
5 Vin models: 16 V max.
12 Vin models: 25 V max.
24 Vin models: 50 V max.
48 Vin models: 100 V max.
Start-up voltage
5 Vin models: 4.5 VDC (or lower)
12 Vin models: 9 VDC (or lower)
24 Vin models: 18 VDC (or lower)
48 Vin models: 36 VDC (or lower)
Startup time 30 ms
Under voltage shut down
5 Vin models: 4 VDC typ.
12 Vin models: 8 VDC typ.
24 Vin models: 16 VDC typ.
48 Vin models: 33 VDC typ.
EMC emissions
– Conducted & Radiated input suppression EN 55011 limits to IEC 60601-1-2 4th editon
EN 55032 class A (internal filter)
– Application note for filter class B proposal www.tracopower.com/overview/thm3
EMC immunity
– Generic for Medical equipment IEC/EN 60601-1-2 4th edition
– ESD (electrostatic discharge) EN 61000-4-2, air ±15 kV, contact ±8 kV,
perf. criteria A
– Radiated immunity EN 61000-4-3, 10 V/m, perf. criteria A
– Fast transient / surge EN 61000-4-4, ±2 kV, perf. criteria A
(with external input capacitor / diode) EN 61000-4-5, ±2 kV perf. criteria A
5 Vin models: Nippon chemi-con KY 1000 µF/ 25 V and
reverse diode (Vishay V10P45) in parallel
12 & 24 Vin models: Nippon chemi-con KY 470 µF/ 50 V
48 Vin models: Nippon chemi-con KY 330 µF/ 100 V
– Conducted immunity EN 61000-4-6, 10 Vrms, perf. criteria A
– Magnetic field immunity EN 61000-4-8
100 A/m, continuous, perf. criteria A
1000 A/m, 1 sec., perf. criteria A
External input fuse required
(recommended values, slow blow type)
5 Vin models: 1.6 A
12 Vin models: 0.8 A
24 Vin models: 0.5 A
48 Vin models: 0.315 A
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