STERLING Pro Protect A Alternator Protection Switch

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Item no. 33104, 33105
SVB price: €75.59
Excl. VAT, excl. shipping costs.
This is a NET-price excluding German VAT. Shipments to countries outside of the EU may be subject to import duties and taxes.
Only 3 in stock
Item no.
Model no.
STERLING - Pro Protect A Alternator Protection Switch

Product details

​Protect your alternator with the Pro Protect A alternator protection switch from STERLING. The switch is activated at the exact moment when there are no more electrical consumers, but the alternator is still producing electricity. The Pro Protect A acts as the smallest consumer and consumes the excess electricity. This is of particular importance if the battery main switch is accidentally disconnected when the engine is running. In this case, the alternator has no further electrical consumers and, in the worst case, it can destroy the diodes and thus the entire alternator.
During normal operation, the protection device does not consume any power.

Technical specifications
  • Nominal voltage: 12 / 24V
  • Dimensions: 90 x 90 x 60 mm
  • Weight: 0.25 kg


en-flag Brochure
PDF, 1,77 MB
en-flag Drawing
PDF, 67,12 KB
multi-flag Manual
PDF, 177,37 KB

What other SVB customers have to say

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5 customer reviews

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100% recommend SVB
Sergey Z.
by Sergey Z. Flag of Netherlands 11/30/2022 Verified purchase Variant: 33105
Reinhard W.
by Reinhard W. Flag of Germany 10/27/2022 Verified purchase Variant: 33104
very good
As protection for the alternator if starter (AGM) and service battery (LiLitium, Liontron) are accidentally interrupted by the alternator while the engine is running.
Peter S.
by Peter S. Flag of Germany 12/2/2021 Verified purchase Variant: 33104
Gute Ware, schnelle Lieferung, gerne wieder
Works well as expected.
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