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CAMTEC - 75W Power - Low Ripple OSW00751 SERIES

  • 75 Watts Power Supply
  • DIN Rail 35mm Metal housing
  • Low Ripple
  • Baseplate Cooled Power. Natural convection
  • > 91% efficiency typical
  • -20°C...+60°C full output power
  • Continuous short circuit protected
  • Overload & low voltage protected
  • Soft start & auto-recovery
  • EMI/EMS EN61000-6-2.3. EN55022 class B
  • PFC: EN61000-3-2 class A
  • cUL60950/16950 IEC(EN)60950-1
  • Series & parallel operation
  • High reliability. Shock & vibration resistant


Product Overview


75 Watts Power Supply -20...+70°C, Low Ripple  

Available Outputs:   5V,  12V,  15V,  18V,  24V  

Description   The OSW power supply series realizes very high power efficiency in a space-saving housing. This design enables Green Power applications and allows free air convection. Latest generation electrical devices relate to the high reliability of all Camtec products. The Camtec philosophy is, to employ low ESR ultra long life capacitors where expedient to achieve a superior lifetime of our products. The used screw terminals allow easy to wire and smooth service. The units perform low ripple & noise. It makes them applicable for sensitive MSR and for Audio systems.

Sense operation   The OSW00751.05 provides sense connections to compensate a voltage drop over the load lines. The maximum compensation is 200mV. Be aware that this operation mode may recommend extended preparations concerning interference elimination or other protections. We recommend to use the sense wires twisted. Make sure that the polarization is correct to avoid damages to the power supply. All other OSW00751 models have no sense connection.

Parallel und series operation   Camtec power supplies of the same model and the same output voltage can be either used parallel or in series. The assembling of external parts is usually not recommended. Make sure that the output voltage of each connected unit is ±1% equal. We recommend connecting the DC-outputs to a neutral point or a power bar. Follow the safety norms of dangerous dc-voltages.

UI-Chart, overload and temperature control characteristic   The OSW models base on a typical resonance converter. The converter is ideal for complex loads and DC-drives. Consciously we resigned an excessive power boost that mostly occurs in less exact working control circuits. The advantage is, that the power supply delivers its energy always controlled and constant to the load. Even with a faulty operation of the power supply the loads never expose to high risk.


Output Voltage See selection table
AC Input Voltage 90-265Vac
Frequency 47-63Hz
DC Input Voltage 110…375Vdc
AC Input Rating 100...240Vac , 115Vac <1.6A 230Vac <0.8A
Tolerance ± 1%
Load regulation < ± 0.5% 10-100%, 100-10%
Minimum Load 0 A
Efficiency Up to 90%
Load Protection 1,2x Irated ,auto recovery
Voltage Protection 140% of Uout , auto recovery
Short Circuit Protection Continuous
Hold Up Time > 40ms 230Vac
Inrush Current < 32A (230Vac)
Softstart 50ms typical
Cooling Natural convection
Ambient Temperature - 20°C…+70°C
Storage Temperature - 40°C…+85°C
Air & Surface Leakage Paths > 8mm
Input to Output Isolation IP-OP: 3kVac IP-GND:2kVac OP-GND:0.5kVac
MTBF IEC61709 400000h
MTTF EN61209, SN29500 140182h @ 40°C 24/7 85% load
Clima/Dirt/Hight/Humidity 3k3, Kl.2, 3000m NN, 90% hum.
ROHS conformity Directive 2011/65/EU
REACH conformity REACH Directive 1907/2006
EMI EN55022 class B / EN61000-3-2
EMS EN61000-6-2,3
Safety EN60950-1, EN60204-1
Safety class 1(A) VDE0805, VDE0100
Dimensions (HxWxD) See technical illustrations
Weight 300g

Terminal plug AWG26...AWG12

SK1 & SK2 not included

Selection Table







Rated DC-Voltage 5Vdc 9Vdc 12Vdc 15Vdc 24Vdc
Rated DC-Current 7.5A 7.6A 6.0A 5.0A 3.2A
Power Boost ≤60 sec. 9.0A 9.12A 7.2A 6.0A 3.84A
Ripple [mVpp] 230Vac/20MHz) 15mV 15mV 20mV 20mV 50mV
Output adj. Range [V] 4,9..5,5 8,6..9,9 11,4..13,2 14,3..16,5 22,5..28,5
Sense Compensation 200mV No No No No
Stability Load switch ± 0,1% ± 0,5% ± 0,3% ± 0,2% ± 0,1%

Optional Coating (option C): Order code: OSW00751.Vout+options Example: 24V for DIN-Rail with coating = OSW00751.24WC

Technical Illustration

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