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Toroidal Transformers

Toroidal transformers are electrical transformers characterised by their donut-shaped (toroidal) magnetic core, typically made of ferrite or wound silicon steel. These transformers are built to step up or step down AC voltages in a range of electrical and electronic devices. Unlike traditional laminated transformers, the windings of a toroidal transformer are evenly distributed around the entire core, resulting in a more efficient magnetic circuit.

Why Buy Toroidal Transformers?

Toroidal transformers offer several advantages. They are lightweight, compact, durable, flexible, easy to install, and highly efficient, resulting in absolute energy savings. The ring-shaped core of a toroidal transformer minimises leakage flux, EMI (electromagnetic interference), and noise. Additionally, the need for less wiring and mounting space significantly translates to reduced installation costs and improved durability, making them a wise investment. 

View Our Range of Best-in-Class Toroidal Transformers:

Our extensive collections include high-performance toroidal transformers––the perfect solution for your power conversion needs:

  • Open Toroidal Transformers: These transformers feature an exposed core and windings, allowing efficient heat dissipation. They offer flexibility in mounting and connection options. An open toroidal transformer is best used in applications that have good ventilation and are not in harsh environments. 
  • Encapsulated Toroidal Transformers: Encapsulated transformers are encased in a protective resin or epoxy material. They provide enhanced durability and protection against environmental factors like moisture, dust, and mechanical stress. The encapsulation of an encapsulated toroidal transformer also improves safety by isolating the windings and core. 

Typical Uses of Toroidal Power Transformers:

Toroidal transformers are utilised in several low-KVA rated electronic and electrical devices and applications, including:

  • Audio Equipment 
  • Medical Devices 
  • Industrial Control Systems 
  • Renewable Energy Systems 
  • Lighting Systems 
  • Welding Machines & Inverters
  • Electronic Circuits 
  • Power Supplies

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Manufacturer Part No
Name
Availability
Price
Rating
Nuvotem Talema
Rohs Verified
91941-P2S2, Nuvotem Talema
Pre Order
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1 +
£ 35.49
10 +
£ 33.54
25 +
£ 29.99
RS Pro
Rohs Verified
123-3994, RS Pro
1 In Stock
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1 +
£ 114.74
5 +
£ 105.56
10 +
£ 97.19
RS Pro
Rohs Verified
123-4013, RS Pro
2 In Stock
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1 +
£ 34.92
10 +
£ 32.83
25 +
£ 30.38
RS Pro
Rohs Verified
123-4022, RS Pro
Pre Order
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1 +
£ 48.95
10 +
£ 46.01
25 +
£ 42.34
RS Pro
Rohs Verified
117-6054, RS Pro
10 In Stock
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1 +
£ 56.03
10 +
£ 49.81
RS Pro
Rohs Verified
117-6062, RS Pro
Pre Order
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£ 94.23
10 +
£ 84.81
RS Pro
Rohs Verified
117-6069, RS Pro
6 In Stock
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1 +
£ 115.80
10 +
£ 96.58
RS Pro
Rohs Verified
117-6071, RS Pro
8 In Stock
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1 +
£ 142.10
10 +
£ 139.27
Rohs Verified
RKD 1600/2x115, Block
Pre Order
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£ 299.15
Rohs Verified
RKD 200/2x18, Block
2 In Stock
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1 +
£ 81.42
10 +
£ 71.49
Rohs Verified
RKD 60/2x24, Block
2 In Stock
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1 +
£ 38.28
10 +
£ 33.65
Nuvotem Talema
Rohs Verified
91943-P2S2, Nuvotem Talema
40 In Stock
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£ 28.92
10 +
£ 27.33
25 +
£ 24.44
Rohs Verified
RKD 625/2x115, Block
1 In Stock
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1 +
£ 164.12
10 +
£ 155.92
Rohs Verified
RKD 50/2x12, Block
5 In Stock
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1 +
£ 50.83
10 +
£ 47.47
Rohs Verified
RKD 40/2x12, Block
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£ 37.72
10 +
£ 33.12
Rohs Verified
RKD 30/2x12, Block
4 In Stock
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1 +
£ 31.46
10 +
£ 29.43
Rohs Verified
RKD 250/2x18, Block
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£ 97.14
10 +
£ 85.29
Rohs Verified
RKD 300/2x12, Block
2 In Stock
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1 +
£ 106.50
10 +
£ 99.69
Nuvotem Talema
Rohs Verified
58-0300-012-D, Nuvotem Talema
23 In Stock
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1 +
£ 137.97
10 +
£ 130.39
25 +
£ 116.59
Rohs Verified
RKD 500/2x30, Block
Pre Order
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1 +
£ 144.60
10 +
£ 126.95
Rohs Verified
RKD 160/2x24, Block
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£ 52.98
10 +
£ 47.21
Rohs Verified
RKD 20/2x12, Block
1 In Stock
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1 +
£ 47.34
10 +
£ 44.26
Rohs Verified
RKD 30/2x9, Block
2 In Stock
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1 +
£ 47.76
10 +
£ 40.60
25 +
£ 35.81
RS Pro
Rohs Verified
117-6077, RS Pro
8 In Stock
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1 +
£ 194.31
Nuvotem Talema
Rohs Verified
91240-P2S2, Nuvotem Talema
47 In Stock
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1 +
£ 48.57
10 +
£ 45.91
25 +
£ 41.04
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New Items
New items
RS_671-9028, RS PRO

RS_671-9028, RS PRO

Toroid open wound 230V primary High quality open style toroidal transformers with single 230Vac 50/60Hz primary winding. Twin secondary windings may be connected in series or parallel or used independently. Small size and low weight compared with traditional stacked lamination types Extremely low level of radiated magnetic field Very low induced noise (hum) Very low iron loss Double insulated primary leads
New items
RS_671-9006, RS PRO

RS_671-9006, RS PRO

Toroid open wound 230V primary High quality open style toroidal transformers with single 230Vac 50/60Hz primary winding. Twin secondary windings may be connected in series or parallel or used independently. Small size and low weight compared with traditional stacked lamination types Extremely low level of radiated magnetic field Very low induced noise (hum) Very low iron loss Double insulated primary leads
New items
RS_671-8996, RS PRO

RS_671-8996, RS PRO

Toroid open wound 230V primary High quality open style toroidal transformers with single 230Vac 50/60Hz primary winding. Twin secondary windings may be connected in series or parallel or used independently. Small size and low weight compared with traditional stacked lamination types Extremely low level of radiated magnetic field Very low induced noise (hum) Very low iron loss Double insulated primary leads
New items
RS_671-9053, RS PRO

RS_671-9053, RS PRO

Toroid open wound dual 115V primary High quality open style toroidal transformers with dual 115Vac 50/60Hz primary windings and twin secondary windings which may be connected in series or parallel or used independently. Features & Benefits • Small size and low weight compared with traditional stacked lamination types • Extremely low level of radiated magnetic field • Very low induced noise (hum) • Very low iron loss • Double insulated primary leads
New items
RS_671-9040, RS PRO

RS_671-9040, RS PRO

Toroid open wound 230V primary High quality open style toroidal transformers with single 230Vac 50/60Hz primary winding. Twin secondary windings may be connected in series or parallel or used independently. Small size and low weight compared with traditional stacked lamination types Extremely low level of radiated magnetic field Very low induced noise (hum) Very low iron loss Double insulated primary leads
New items
RS_173-0166, RS PRO

RS_173-0166, RS PRO

RS Pro Toroidal PC Transformer 1.6VA- 25VA RS Pro toroidal PC transformers are high efficiency and low profile being a small size and low weight. These Toroidal transformers have low iron loss and low induced noise. Dual 115 V primaries for parallel or series connections. Features Lower stray field Reduced standby current Test voltage primary- secondary 4.0 KV Ease of mounting- M4 Centre bush Ambient operating temperature: +60°C Max Fully RoHS & REACH compliant
New items
RS_117-6065, RS PRO

RS_117-6065, RS PRO

Toroidal Transformers Open 80VA -3000VA RS Pro offer these open style toroidal transformers designed for use in control circuits and general applications. These high-quality toroidal transformers have low loss and low noise toroidal core. The transformers incorporate primary windings and twin secondary windings which can be connected in series or parallel or used independently. Features Environmentally friendly, low energy dissipation High efficiency, low regulation design 100% electrical and flash tested
New items
RS_123-4034, RS PRO

RS_123-4034, RS PRO

RS Pro Encapsulated Transformers Single Primary Winding15VA-500VA RS Pro High-quality encapsulated toroidal transformers with a single 230 Vac 50/60 Hz primary winding. Twin secondary windings can be connected in series or parallel or used independently. Designed for easy mounting with centre hole fixing. Features Fully encapsulated to UL94-V0 Case material meets UL94-V0, Nylon 6.6 Small size and low weight compared with traditional stacked lamination types Low induced noise (hum) Low iron loss Double insulated primary leads Low surface temperature Fixing bolt not included 100% electrical and flash tested
New items
RS_123-3994, RS PRO

RS_123-3994, RS PRO

RS Pro Open Style Toroidal Transformers 300VA-1000VA RS Pro High-quality open toroidal transformers with a single 230 Vac 50/60 Hz primary winding. Twin secondary windings can be connected in series or parallel or used independently. Designed for easy mounting with centre hole fixing.
New items
RS_123-4006, RS PRO

RS_123-4006, RS PRO

RS Pro Open Style Toroidal Transformers 300VA-1000VA RS Pro High-quality open toroidal transformers with a single 230 Vac 50/60 Hz primary winding. Twin secondary windings can be connected in series or parallel or used independently. Designed for easy mounting with centre hole fixing.
New items
RS_671-8984, RS PRO

RS_671-8984, RS PRO

Toroid open wound 230V primary High quality open style toroidal transformers with single 230Vac 50/60Hz primary winding. Twin secondary windings may be connected in series or parallel or used independently. Small size and low weight compared with traditional stacked lamination types Extremely low level of radiated magnetic field Very low induced noise (hum) Very low iron loss Double insulated primary leads
New items
RS_124-3858, RS PRO

RS_124-3858, RS PRO

RS Pro Toroidal PC Transformer 1.6VA- 25VA RS Pro toroidal PC transformers are high efficiency and low profile being a small size and low weight. These Toroidal transformers have low iron loss and low induced noise. Dual 115 V primaries for parallel or series connections. Features Lower stray field Reduced standby current Test voltage primary- secondary 4.0 KV Ease of mounting- M4 Centre bush Ambient operating temperature: +60°C Max Fully RoHS & REACH compliant
FAQs
We offer free shipping for orders over £200 if delivery is in the UK. All other orders in the UK, shipping from £7.99 depending on the weight and measurement. Mainland Europe shipping charges start from £25. For all other countries shipping charges start from £50 for products like Toroidal Transformers and all others.
You can email us directly at sales@enrgtech.co.uk or via our website for any queries regarding Toroidal Transformers or any other product.
This depends on the Toroidal Transformers individual product and information that can be found on our website.
Yes, we offer special discounts on orders above £200 for Toroidal Transformers and all other products.
UK orders normally take between 2/3 working days. International orders normally take between 3/5 working days for all products including Toroidal Transformers.
Yes. We keep updating our stock frequently and if a product like Toroidal Transformers is not in stock then we will let you know.