Customized transformer

We are pleased to offer and deliver toroidal transformers according to your own wishes from German production since this year.

Please give us the following information:

• Primary voltage: without specification our standard 230Volt 50Hz is valid
• Secondary voltages: We need here in each case both the voltage specification [Volt], as well as the current specification [Ampere].
• You can also specify several voltages or transformer taps, for example 350Volt-300Volt-0Volt-300Volt-350Volt with 0.3Ampere.
• You can specify a shield winding
• Please specify the maximum possible height
• Please specify the maximum possible diameter
• Please specify the desired quantity (important for calculation)
• Please indicate if you want standard (with hole), with center potting (central fixing) or potting in cup (central fixing).
• Please specify if you want standard, or low scatter (small surcharge, but larger)

Please note:

• For tube amplifiers, it is advisable to slightly over-dimension the total power (10% to 20%), as they usually run in a very warm environment and therefore could otherwise become very hot.
• The specified secondary voltage refers to the desired rated current, if this is lower, the voltage output is higher (at no load and very low currents 10% to 30%, otherwise about 3% to 10%).
• If you want to connect windings in parallel, please indicate this separately.
• For two-way rectification or tube rectification desired double voltages e.g. 400V-0-400V can not be connected directly in parallel (because series connection).
• These are connected together via the rectification
• The maximum secondary voltage per winding is 450Volt (reason is the insulation strength)
• The maximum secondary power with 1 phase is 1500VA
• Smallest possible secondary voltage: 4Volt (for small voltages below 10V, some tolerance must be taken into account due to the integers of windings).
• The connections are made with stranded wires, about 20cm long.
• Please consider the fuse protection (slow) for the inrush current. We recommend a soft start circuit from 400VA
• We manufacture according to the currently valid legal regulations of the EU (RoHs, Reach, EN) VDE, CSA or UL approvals must be carried out by the customer, if required.
• We assume no liability for consequential damages or errors. Our general terms and conditions apply, see https://btb-elektronik.de/widerruf-agb/
• Customized toroidal transformers are specially calculated, calculated and manufactured for them (also single pieces), payment in this case exclusively by prepayment, no return possible
• Order must be made in writing (mail, contact via the store, fax or mail)
• Standard delivery time from payment is two to four weeks
• Warranty: 6 months from date of delivery

We are looking forward to your inquiry and will offer you your desired transformer within a short time.

Sincerely,

The BTB Team and Michael Kaim