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Triad Magnetics - Model MD-250-U -Medical Grade Isolation Power Transformer

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The MD-250-U is a medical grade isolation power transformer designed for use in medical environments where reliable electric isolation is vital. It provides a maximum power output of 250 VA and an input voltage of 120 V with a tolerance of ±10%. The transformer operates at both 50 Hz and 60 Hz frequencies, making it versatile for various applications. It features an alternating current output voltage at a maximum load of 2.08 A and ensures a typical voltage regulation of 8% from full load to no load. The device is engineered with high safety standards, being certified to UL 60601-1 and CSA-C22.2 medical standards, though not suited for life-critical applications. The transformer exhibits a high efficiency of 92% at full load and maintains a leakage current of less than 50 µA. Constructed with a steel enclosure that is powder-coated white, it is designed for horizontal mounting with rubber feet. The MD-250-U is built to withstand operational conditions up to 60 °C ambient temperature and adheres to industry standards such as CSA, cULus, and RoHS 2015/863/EU compliance.
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These medical grade isolation boxes are built using a toroidal transformer construction that inherently helps reduce stray fields, increases efficiency and minimizes size compared to traditional EI transformers. Built with Class F (155º) insulation system. The enclosure is made of steel and powder coated white.
 
 

Maximum Power: 250 V·A

Input Voltage1: 120 V

Output Voltage2: 120 V

Input Voltage Tolerance (Power Cord): ±10 %

Frequency (Power Cord): 50 Hz, 60 Hz

Note for Output Voltage: Alternating Current (AC) Output Voltage (Receptacle) at Maximum 2.08 A.

Typical Voltage Regulation from Full Load to No Load: 8 %

Alternating Current (AC) Input to Output Voltage (Hi-Pot): 3000 V

Alternating Current (AC) Input and Output to Enclosure Voltage (Ground) (Hi-Pot): 1500 V

Typical Efficiency at Full Load: 92 %

Operating Ambient Temperature: Not to Exceed 60 ºC

Leakage Current: Less Than 50 µA

Typical Leakage Current: 10 µA

Fusing: Replace only with 3.0 A, 250 VAC, Slow Blow, UL Listed Fuses.

Safety: Medical

Length: 5.28 in 134 mm

Width: 6.93 in 176 mm

Height: 5.12 in 130 mm

Weight: 4.0 kg

Warranty: 5 years

Enclosure Material: Steel

Enclosure Finish: Powder Coated

Enclosure Color: White

Mounting: Rubber Feet for Horizontal Mounting.

Insulation Class: Class F (155º)

Industry Standards: CSA cULus Listed RoHS 2015/863/EU