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IsoBox International: M-Series

M-Series Medical Grade IsolationM-Series: Manual / Voltage Selector
Medical Hospital Grade
Isolation Transformer


For Safer Use of Medical Electronics in Patient Care Areas

The Medical Grade Isolation Transformers have both low mechanical noise and low EMR (Electro-Magnetic Radiation). We have two standard formats, available in attractive white aluminum cases for floor, wall, chassis and cart installation. Typical applications include installation of computers, video monitors, surveillance cameras, test and measurement instruments, printers, clinics, doctor’s offices, or whenever safe operation of electronics equipment requires low leakage current levels.

This line of enclosed isolation transformers offers all the advantages of the toroidal constructions such as low weight, low magnetic strayfield, low mechanical noise, low losses, high efficiency and cool operating temperature. The low height of the toroidal transformer allows the enclosure to have a low profile for easy installation in a modern office environment.

The enclosures are made of sturdy aluminum with white finish. Other colors are optional. On all the International/Multi-Voltage models, the secondary neutral conductor is NOT grounded.

Now included Japan, 100V, input voltage

The Multi-National M-Series has expanded the International series input voltages to include 100/120/220/240V, through a power entry module with power switch and current limiting fuses. In addition, the selectable output voltage, 115/230V, makes these units suitable for almost all applications and locations worldwide. The outlets are type IEC320-C14. Filtering is standard. The M series also have the capability to fasten the input and output cords through available clips and clamps.

Data: M-Series Manual / Voltage Selector

***Due to the upcoming tariffs being levied on steel/aluminum/materials, etc., there will be an additional charge to your IsoBox order.  This charge will be conveyed to you for your approval prior to any credit card being run or paypal money being collected.


Part No.     




(Volt. Drop) 
IEC 320  
Dimensions       WeightRec.
Cord Size
Inches             mm                Lbs  Kg   
PriceISB-030M3002.5/1.25<7%39.56x5.9x3.1   243x150x79114.9   1018/0.75
Need custom specifications for your transformer? Click here.

International Medical Isolation Transformer - M Series

  • Input/Output: Selectable, 115 or 230V 50-60Hz
  • Safety Agency Approvals: UL2601.1, CSA C22.2 No. 601.1, EN60601-1, IEC601-1 
  • Safety Agency Approvals: CE Marking, AAMI/ANSI ES 60601-1
  • 3rd Edition
  • Leakage Current: < 100µA
  • White Aluminum Enclosure
  • On/Off Switch
  • Thermal Current Limiting Fuse
  • In-Rush Current Limiting Design

M-Series UL Listed  M-Series UL RecognizedIsoBox International: M-Series

Terms and Conditions

  • For larger quantity prices, please contact the factory directly.
  • Prices and data subject to change without prior notice
  • Delivery: Small quantities of standards are normally available from stock
  • 30-Day Return Policy of Undamaged Items - 15% Restocking Fee on Standard Transformers
  • 36 Month Product Warranty
  • Terms and Conditions