Victron Autotransformer 120/240VAC-50A
Victron Autotransformer 120/240VAC- 50A
Resolve Split-Phase Imbalances with Integrated Ground Relay Protection
Highlights:Status LEDs: LED indicators for power, ground relay, and temperature status,Circuit Breaker: Two-pole 32A breaker for overcurrent and temperature protection,Cable Glands: Secure entry points for AC input and output wiring,Cooling Vents: Top-mounted ventilation slots for heat dissipation,Aluminium Enclosure: Lightweight and corrosion-resistant powder-coated housing.
Key features: Toroidal transformer for high efficiency, Integrated 32A two-pole circuit breaker, Automatic ground relay for safety, Robust powder-coated aluminium enclosure, Status LEDs for power, ground relay and temperature.
Bottom view highlighting the central cooling fan for thermal management, two large cable glands for secure wiring, and a dedicated earth grounding stud for safety compliance
Detailed dimensional drawing showing the 425mm height, 214mm width, and 110mm depth, along with precise M6 countersunk mounting hole patterns for installation planning 
DESCRIPTION
Victron Autotransformer 120/240V 50A: High-Capacity Voltage Conversion and Split-Phase Load Balancing
The Victron Autotransformer 120/240V 50A is a high-capacity solution for systems requiring voltage step-up, voltage step-down or split-phase load balancing. Designed for specialist mobile, marine and off-grid power systems, it helps adapt AC power from a generator, shore power connection, inverter or stacked inverter system to suit your installation.
With a toroidal transformer and up to 50A feed-through capacity, it can convert between 120V and 240V AC configurations while helping maximise the usable power available from a 120/240V split-phase supply with uneven 120V loads.
Maximise Split-Phase Power with Load Balancing
In a 120/240V split-phase system, 120V loads are rarely distributed evenly across both legs. A large load on one leg can cause it to reach its current limit while the other leg still has unused capacity. This can restrict the total power available from your generator, grid supply or inverter system.
The Victron Autotransformer creates a new neutral point, allowing load imbalance to be absorbed by the transformer. This helps transfer available energy between the two 120V legs, allowing greater use of the full capacity of the split-phase supply.
The 50A model supports up to 55A of neutral current for 30 minutes and 45A continuously at 40°C, making it ideal for larger systems where significant 120V load imbalance is expected.
Step Up or Step Down AC Voltage
The Autotransformer can also be configured to increase or decrease AC voltage according to the requirements of the installation. It can step a 120V AC source up to 120/240V split-phase output, or step down a 120/240V supply for use with compatible 120V equipment and inverter systems.
This makes it a practical choice for generators, shore power connections, air-conditioning systems, water pumps and other AC loads where the available supply voltage does not match the required system configuration.
A Flexible Alternative to Stacked Inverters
Where 120/240V split-phase output is required, a single 120V inverter paired with an Autotransformer can be an effective alternative to using two stacked 120V inverters. The Autotransformer creates the required split-phase output while allowing available power to be shared more effectively between the two 120V legs when loads are uneven.
Integrated Ground Relay for Victron Inverter/Chargers
The Autotransformer includes an integrated ground relay for compatible Victron MultiPlus and Quattro inverter/charger installations. When correctly configured and connected, it creates the required neutral-to-earth bond to support the correct operation of GFCI and RCD protection devices.
The relay is controlled by the inverter/charger via its ground relay terminals. Installation and configuration must be completed by a qualified electrician in accordance with the Victron wiring diagrams and applicable electrical standards.
Thermal and Overcurrent Protection
Built-in protection helps safeguard the Autotransformer during demanding operation. When the transformer becomes warm, the cooling fan operates and the red temperature LED illuminates. In the event of overheating or overcurrent, the integrated two-pole circuit breaker disconnects the unit. Once the cause has been addressed, the breaker can be manually reset.
Robust Indoor Installation Design
The Autotransformer is housed in a durable aluminium enclosure with an IP21 protection rating, integrated wall-mounting points and screw terminals suitable for cables up to 35 mm² / AWG 2. It is intended for indoor or protected compartment installation and requires sufficient ventilation around the enclosure.
Please note: This is an autotransformer and does not provide galvanic isolation.
Key Features
- High-capacity AC conversion: Supports 120V to 240V step-up and 240V to 120V step-down configurations.
- 50A feed-through current: Suitable for higher-capacity 120/240V AC systems.
- Split-phase balancing: Helps transfer available capacity between uneven 120V loads.
- High neutral-current capability: 55A for 30 minutes and 45A continuous at 40°C.
- Integrated ground relay: Designed for compatible Victron MultiPlus and Quattro inverter/charger systems.
- Thermal protection: Cooling fan, temperature indication and automatic disconnect protection.
- Overcurrent protection: Integrated two-pole circuit breaker for protection and manual reset.
- Durable construction: Toroidal transformer in an aluminium IP21 enclosure.
- 5-year warranty: Backed by Victron Energy’s limited 5-year warranty.
Technical Specifications
- Input/output voltage: 120 / 240V AC
- Frequency: 50/60Hz
- Input circuit breaker: 50A, two-pole
- Maximum 240V feed-through current: 50A
- Neutral current: 55A for 30 minutes at 40°C; 45A continuous at 40°C
- Transformer type: Toroidal
- Electrical terminals: Screw terminals, up to 35 mm² / AWG 2
- Protection rating: IP21
- Dimensions: 460 x 214 x 110 mm
- Weight: 12.5 kg
Make Better Use of Your Available AC Power
For larger compatible 120/240V power systems, the Victron Autotransformer 50A provides a practical way to adapt AC voltage, manage uneven split-phase loads and improve the use of available generator or inverter capacity. It is ideal where system flexibility, safe neutral grounding and high-capacity load balancing are required.
SPECIFICATIONS
Specifications
| Part Number | ITR000100052 |
|---|---|
| Input/Output Voltage | 120 / 240 V |
| Input Circuit Breaker | 50 A, Two Pole |
| Frequency | 50/60 Hz |
| Maximum 240 V Feed Through Current | 50 A |
| Neutral Current, 30 Min | 55 A @ 40 °C / 100 °F |
| Neutral Current, Continuous | 45 A @ 40 °C / 100 °F |
| Transformer Type | Toroidal |
| Enclosure | Aluminium |
| Electrical Terminals | Screw Terminals, 35 mm² / AWG 2 |
| Protection Category | IP21 |
| Safety | EN 60076 |
| Weight | 12.5 kg |
| Dimensions (H x W x D) | 460 x 214 x 110 mm |
| SKU: | VIC-ITR000100052 |
| Barcode: | 8719076022404 |
| Model #: | ITR000100052 |
| MPN: | ITR000100052 |
| HS code: | 85043200 |
| Country of origin: | IN |
| Package weight: | 13.58 kg |
| Package length: | 0.32 m |
| Package width: | 0.5 m |
| Package height: | 0.2 m |
WARRANTY
Victron Energy Limited Warranty Policy
Direct Customers
Victron Energy provides the following warranty to any direct customer (OEM, distributor or dealer) in relation to any products that Victron Energy has directly sold to the direct customer. This warranty is not an end-user warranty between Victron Energy and an end-user, and end-users shall not have any rights or remedies under this limited warranty towards Victron Energy directly. The direct customer shall, in turn, ensure that the end-user is provided with a warranty identical to this warranty, subject to applicable local mandatory law.
End-Users
Victron Energy may also provide a warranty directly to end-users, in which case the below warranty conditions equally apply to such warranty. In that case, end-users shall claim their warranty at their place of purchase or through the original direct customer of Victron, which can be found through the support section on Victron’s website. Hence, the direct customer shall on behalf of Victron Energy deal with any warranty claims made under any warranty that Victron Energy may provide directly to end-users. This support section on Victron’s website will provide further guidance on the procedure for end-users to make a claim under this limited warranty.
If the end-user is a consumer – a natural person who is acting for purposes which are outside that person's trade, business, craft or profession – the following applies. The rights and remedies granted to the consumer under this limited warranty are without prejudice to the consumer’s statutory rights. Furthermore, the consumer is entitled by law to remedies from the seller free of charge in the event of a lack of conformity of the goods (such as repair, replacement, price reduction or rescission), which remedies are not affected by this limited warranty.
Warranty
Victron Energy warrants its products to be free from defects in workmanship and materials for a period of 5 years from the date of purchase by the original end-user, with a maximum of 66 months from the Victron Energy invoice date. Exceptions on this are: lead-acid batteries: 2 years from date of purchase by the original end-user, with a maximum of 30 months from the Victron Energy invoice date, Lithium batteries: 3 years from date of purchase by the original end-user, with a maximum of 42 months from the Victron Energy invoice date. In addition to this, proof of correct battery usage is required when making a battery warranty claim.
For a 10% surcharge on the current net price for products that came with a 5-year warranty, an additional 5 years of warranty can be purchased by Victron’s direct customers, bringing the total warranty to 10 years. Warranty extensions need to be applied for ultimately one year before the expiration of the original term. Victron may ask proof that the product was still functional at the time of purchase of the extended warranty.
During the warranty period, Victron Energy will, at its discretion, repair, replace or (partly) credit the defective product free of charge. The warranty does not include performing or reimbursing de‐installation, transportation, and re‐installation.
This warranty will be considered void if the unit has suffered any physical damage or alteration, either internally or externally, and does not cover damages arising from improper use like:
- Reversed battery polarity.
- Inadequate connection.
- Mechanical shock or deformation.
- Contact with liquid or oxidation by condensation.
- Use in an inappropriate environment (dust, corrosive vapour, humidity, high temperature, biological infestation, etc.).
- Breakage or damage due to lightning.
- Connection terminals and screws destroyed or other damages, like overheating, due to insufficient tightening.
- For any electronic breakage except due to lightning (reverse polarity, over‐voltage due to external cause), the state of the internal control diode and/or the input/output X and Y capacitors determine the warranty.
This warranty will not apply where the product has been misused, neglected, improperly installed, or repaired by anyone other than Victron Energy or one of its authorized Repair Centres. In order to qualify for the warranty, the product must not be disassembled or modified.
This warranty and our warranty obligations thereunder (repair, replacement or credit) are the direct customer’s and, if applicable, the end-user’s sole rights and remedies and our sole obligations with respect to any defective and/or non-conforming product or breach of warranty and is subject to and without prejudice to the limitations of liability in this warranty.
Victron Energy shall not be liable for damages, whether direct, incidental, special, or consequential, even caused by negligence or fault.
As a product requires service, it must be brought back to the place of purchase. In case no contact can be made with the merchant, or if he is either unable or not allowed to provide service, direct contact should be made with Victron Energy through the support section on Victron’s website.
In case Victron Energy replaces a product, it will own the replaced product. Victron Energy owns all parts removed from repaired products. Victron Energy uses new or reconditioned parts made by various manufacturers when performing warranty repairs or building replacement products.
If Victron Energy repairs or replaces a part of a product, its warranty term is not extended: the warranty will apply for the remaining term of the original warranty term. For example, if Victron Energy replaces a product with a 5-year warranty after 3 years, the warranty of this product will apply for another 2 years, with a minimum of 6 months.
All remedies and the measure for damages are limited to the above. Victron Energy shall in no event be liable for consequential, incidental, contingent or special damages, even if having been advised of the probability of such damages.
The foregoing limited warranty provided by Victron Energy is in lieu of any other warranties, express or implied arising by law, course of dealing, course of performance, usage of trade or otherwise, of any kind whatsoever including, without limitation, warranties of merchantability or fitness for a particular purpose, with respect to any product. The above is without prejudice to the arrangement for consumers detailed above.
Life Support Policy
As a general policy, Victron Energy does not recommend the use of any of its products in life support applications where failure or malfunction of Victron Energy's product can be reasonably expected to cause the failure of the life support device or to significantly affect its safety or effectiveness. Victron Energy does not recommend the use of any of its products in direct patient care. Victron Energy will not knowingly sell its products for use in such applications unless it receives in writing assurances satisfactory to Victron Energy that the risks of injury or damage have been minimized, the customer assumes all such risks, and the liability of Victron Energy is adequately protected under the circumstances.
Warranty on repairs for products outside their warranty period
The warranty period on products that are outside their warranty period and have been repaired by Victron Energy or one of the Victron Energy Repair centres is six (6) months from delivery. The same applies to spare parts and circuit boards that have been supplied or repaired by Victron Energy.
Transport
It is the responsibility of the sender to sufficiently package these products. The transport must be organized in a way to avoid any damage, especially when a single unit or heavy unit is sent.
Severability
If a part of the terms and conditions of this warranty is held invalid, void or unenforceable due to any particular national or international legislation, it shall not affect other parts of the terms and conditions of this warranty.
Applicable law
This warranty is exclusively governed by the laws of the Netherlands, to the exclusion of the UN Convention on Contracts for the International Sale of Goods.





