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Atag ignition transformer
,

Atag ignition transformer S4851000

€ 54.49 incl. VAT

Original spare part Atag. Type: Ignition transformer. Application: Boiler / i28CZ iCon1. Supplier code: S4851000.

SKU: 8138546 Categories: , Brand:

Price and stock checked on 20 October 2026.

✓ In stock — delivery usually within 3–5 working days
EU delivery from € 17.95 · Shipping & payment

Price incl. VAT. Any delivery costs are calculated in the basket — see shipping & delivery.

Does this fit my appliance?
ApplicationBoiler
Series / modeli28ECZ-TY28E20H iCon1 and 27 other models
Atag numberS4851000
Article number8138546
Not sure? Search by article or manufacturer number or check with the manufacturer or your installer.
All spare parts for Atag i28ECZ-TY28E20H iCon1 →
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Atag ignition transformer: original Atag spare part, type: Ignition transformer. Application: Boiler (i28CZ iCon1). Manufacturer number: S4851000; Instalpunt article number: 8138546.

According to the Atag parts lists, this part fits 28 models, including Atag i20C iCon1, Atag i20EC iCon1 and Atag i28C iCon1. The full list is under “Fits”.

In stock: order before 14:00 and it ships the same working day; delivery within the EU usually takes 3–5 working days.

Check the rating plate of your appliance before ordering; if in doubt, ask the manufacturer or your installer. Work on gas-carrying parts must be carried out by a qualified gas engineer.

Product information: Atag ignition transformer S4851000

BrandAtag spare parts
Atag manufacturer numberS4851000
Instalpunt article number8138546
EAN8719638556866
Part typeIgnition transformer (All Atag ignition and ionisation · ignition and ionisation of all brands)
ApplicationBoiler
Suitable for28 Atag models (see list)
DeliveryIn stock, delivery in 3–5 working days
Price€ 54,49 incl. VAT
OriginSupplied through the official technical wholesale channel, under Atag number S4851000

Also known as: ontstekingstransformator, ontsteektrafo.

Fits 28 Atag models

The part Atag ignition transformer S4851000 is in the official parts list of these Atag appliances. Click a model for the complete parts list and exploded view.

Atag Boiler (28)

Check the rating plate of your appliance. Not sure whether this part fits? Check with the manufacturer or your installer; with the correct manufacturer number you can order it here directly.

More spare parts for this appliance

Does this fit my appliance?

Enter your appliance type, for example as shown on the rating plate. You will see straight away whether the Atag ignition transformer S4851000 is in the parts list of that model.

Not found? Check the rating plate of your appliance or search by article number. If in doubt, just email info@instalpunt.nl.

Position on the parts diagram

This spare part is shown as position 142 on the parts drawing. Open the drawing for the appliance and click the number to check that you have the right spare part.

Also appears on the drawing of 14 other models.

For which fault is a Atag ignition transformer replaced?

According to the fault code database, these Atag fault codes point to this type of part. Always check first that the code matches the appliance type on the rating plate.

CodeWhat is going on
501Ionisation fault

All Atag fault codes explained

Indicative: the same code can have a different cause depending on the situation. Have work on gas, flue or burner adjustment carried out by a qualified installer.

Frequently asked questions about this item

Does the Atag ignition transformer S4851000 fit my appliance?
This part is in the parts list of 28 Atag models, including the i20C iCon1, i20EC iCon1, i28C iCon1, i28CZ iCon1. The model type is on the rating plate of your appliance. Use the “Does this fit my appliance?” search box on this page to check your model. If in doubt, ask the manufacturer or your installer.
What is the delivery time for the Atag ignition transformer S4851000?
This item is in stock. Ordered before 14:00, it ships the same working day and usually arrives within three to five working days.
Can I return this item?
Yes, unused and in the original packaging within 14 days of receipt. Unpacked or fitted items and electronics such as PCBs cannot be returned. How to register a return is explained on returns.
What does shipping cost?
Shipping costs € 17.95 to Austria, Denmark, Italy, Spain and Sweden and € 24.95 to other EU countries. In-stock items ordered before 2 pm are dispatched the same working day; delivery usually takes 3–5 working days. Details: Shipping.
I have a fault code, which part do I need?
Look up the code in the fault code finder: per brand and appliance it shows what the code means and which part goes with it. If the code is listed with this part, the part belongs to that fault.

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