Achtung: Wir sind bis 2. März im Urlaub.
Sie können wie gewohnt im Shop bestellen, die Ware wird aber später versandt. Erster Versandtag nach dem Urlaub ist Montag der 4. März 2024
Please note: We are on holiday until March 2nd.
You can order as usual in the shop, but the goods will be shipped later. The first day of dispatch after the holiday is monday 4 March 2024.

Inrush current limiter

An inrush current limiter is a device used to limit the initial current surge that occurs when a transformer is first turned on. This surge, called inrush current, can be many times the normal operating current of the transformer and can cause damage to the power supply, wiring, and other components in the system.

An inrush current limiter works by inserting a resistor into the circuit during the initial phase of inrush to reduce the current flow and limit the inrush current to a safe level. This resistance is usually provided by a thermistor, a resistor with a temperature-dependent resistance.

These limiters are very well suited for the safe switching on of large toroidal transformers.
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An inrush current limiter is a device used to limit the initial surge of current that occurs when a transformer is first powered on. This surge of current, known as inrush current, can be many times higher than the normal operating current of the transformer and can cause damage to the power supply, the wiring, and other components in the system.

An inrush current limiter works by introducing a resistance in the circuit during the initial stages of power-up, reducing the current flow and limiting the inrush current to a safe level. This resistance is typically provided by a thermistor, which is a resistor with a temperature-dependent resistance.

The thermistor is placed in series with the primary winding of the transformer and is designed to have a high resistance at room temperature. When the power is first applied, the current flowing through the thermistor heats it up, reducing its resistance and allowing the inrush current to flow through the system.

As the temperature of the thermistor increases, its resistance decreases, limiting the amount of current that can flow through the system. Once the inrush current has passed, the thermistor cools down and its resistance increases, ensuring that the normal operating current of the transformer is maintained. In good designed limiters the thermistor is then disconnected by a relais contact, ensuring normal direct operation of the transformer. Our limiters work this way.

In summary, an inrush current limiter is an important component in a transformer-based power supply, as it helps to protect the system from the damaging effects of inrush current and ensures safe and reliable operation.

Frequently asked Questions about the shop

 Can I order as a guest?

Yes! You do not need a customer account.
You can order as a guest without creating an account, that is our default. Only if you want you can also create an account.
You can also pay in the shopping cart directly with Paypal or Amazon, then you do not have to enter any data at all.

Alternatively, you can also simply log in with your Amazon account. However, we do not receive your Amazon access data but only your address for shipping in case of order. The data is entered on an Amazon page, which is only displayed here in the store. The entries are processed 100% by Amazon via an encrypted connection.

 How can I pay?

We offer a wide range of payment methods:

  • Paypal
  • Prepayment
  • Bank transfer
  • Credit cards (Visa, Mastercard, Amex, CartaSi, CarteBleu, Maestro)
  • Amazon Pay
  • Apple Pay
  • eps for Austria.
  • iDEAL in the Netherlands
  • Przelewy24 in Poland
  • Belfius and KBC in Belgium

All payments are processed by secure reputable service providers, your payment details are securely SSL encrypted.

 Can I buy on account?

No, currently that is only possible in Germany.

 Is there a minimum order value?

No, there is no minimum order value, we also ship smallest parts directly. 
 

 How much are the shipping costs?

The shipping costs are calculated by weight.
If you put your desired goods in the shopping cart, you will see there the shipping costs for your order. If desired, you can also change the delivery country there.

 Can I also return items?

We grant 30 days return policy on all items. Simply send the goods back to us if you are not satisfied, we will immediately credit the amount if the item was not used. We are also happy to help in advance to clarify any ambiguities, this is sometimes better than sending back immediately.

 

 Can I buy VAT free with EU VAT ID?

Yes, as a European customer you can also enter an EU VAT number in the customer data, then you will not be charged VAT, the prices will then be displayed tax-free. This does not apply to customers with delivery country Germany. All countries outside Europe are automatically delivered tax free.

 How can I reach you?

You can easily reach us by phone, whatsapp and email:

 Hotline: +49 (0)4281 50 79 78 2 (Mo-Fr. 14-18:00)

 Whatsapp: +49 (0)4281 50 79 78 2

 E-Mail: info@rocketronics.de

 

     

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About Rocketronics

Rocketronics was founded in 1999 as a family business by Louis Schreyer. As an engineer for microelectronics, I design hardware and also develop the software for it. We manufacture our products in-house on our own machines, and this for over 20 years now - made in Germany. In addition to the development and production, the testing of the products is also carried out here. We also manufacture the prototype construction and the test fixtures ourselves. We use lathes and milling machines for this, but we also use our 3D printers a lot. The CNC milling machines we build ourselves produce many small parts, e.g. for the housings of our controllers.

In addition to manufacturing controllers, we also trade in the necessary components. As a dealer we have a large stock of components for machine building and automation, which we offer in this store. Our suppliers are the original manufacturers, with us you buy tested branded goods. 

We also consult you when it comes to choosing the right components. We have a lot of experience in building and operating CNC milling machines and lathes. We can help you if you have questions, be it about the control system, the choice of drives or in general about the construction of CNC milling machines and the conversion of lathes. 

Our online store shows you all items available for immediate delivery, and allows you to shop securely with many payment methods and fast shipping. Data traffic is of course encrypted, payment is processed and secured by reputable service providers, and we offer a 30-day return policy

You find more about Rocketronics on our About Us Page