{{ totalProductsCount }}

In cart {{totalProductsCount}} item(s)

Total:
{{sum | formatAmount}}

Your cart is empty

header-product Siemens 3UG4511-1AP20 Phase Sequence Monitoring Relay, 3A, 1 Changeover Contact, 0.45s Delay, 320-500V AC
104.99 €

Siemens 3UG4511-1AP20 Phase Sequence Monitoring Relay, 3A, 1 Changeover Contact, 0.45s Delay, 320-500V AC

Siemens 3UG4511-1AP20 Phase Sequence Monitoring Relay Photo 1
Keep track of price changes You keep track of price changes
Watch the price drop

Leave your address - as soon as the price of the product goes down, you'll know about it right away

You keep track of price changes

Siemens 3UG4511-1AP20 Phase Sequence Monitoring Relay, 3A, 1 Changeover Contact, 0.45s Delay, 320-500V AC

{{email}}
You keep track of price changes

Siemens 3UG4511-1AP20 Phase Sequence Monitoring Relay, 3A, 1 Changeover Contact, 0.45s Delay, 320-500V AC

{{email}}
{{selectedOffer && selectedOffer.price | formatAmount}}

Short description

The Siemens 3UG4511-1AP20 is a professional phase sequence monitoring relay designed for industrial electrical systems. It features a 3A current rating, one changeover contact, and a 0.45-second response delay. Operating within a 320-500V AC voltage range, this device ensures reliable protection by monitoring phase sequence and failure, making it an essential component for safeguarding motors and sensitive equipment in various automation applications.
Available for order: 4 pcs.
Warranty: 2 Years
SKU: 12463458
free shipment

Cheapest delivery:

Venipak Locker LV

Pick-up points

Venipak Locker LV

Cost

1.89 €

Deliver

{{selectedOffer.parcelStationDeliveryString}}

Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
14.07.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
17.07.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 €
Parcel couriers
Venipak Locker LV / Latvijas Pasts pakomāts / Unisend LV / DPD Paku skapis / Omniva LV / Venipak Pickup LV / Latvijas Pasts nodaļa
17.07.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.89 €
0 credit

pay in 3 equal parts

today

0 €

afterward

3 mth. х 35 €

overpayment

0 €

All payment Methods:
Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment
36 months installment: from 2.92 euros per month
Together cheaper
{{product.price | formatAmount}}
{{product.title}}
{{productBundle.reference.specialPrice | formatAmount}}
{{productBundle.title}}
{{productBundlePreviousPrice | formatAmount}}
{{productBundleSpecialPrice | formatAmount}}

You saving {{productBundleYouSave | formatAmount}}

Product information

Description

The Siemens 3UG4511-1AP20 is a professional-grade phase sequence monitoring relay engineered to provide robust protection for industrial electrical systems. By continuously monitoring the phase sequence and detecting potential phase failures, this device helps prevent damage to motors and sensitive electrical equipment caused by incorrect power supply conditions. It is designed for reliable operation within a voltage range of 320-500V AC, ensuring consistent performance in demanding automation environments.

Advantages

This monitoring relay offers high reliability and precision in detecting phase-related faults, which is critical for maintaining the longevity of industrial machinery. Its compact design allows for efficient integration into control cabinets, while the integrated 0.45-second response delay helps prevent nuisance tripping caused by minor, transient voltage fluctuations. The inclusion of a changeover contact provides versatile switching capabilities, allowing it to be easily incorporated into various safety and control circuits.

Suitable for

  • Monitoring phase sequence in three-phase industrial networks
  • Protecting three-phase motors from phase failure
  • Automation systems requiring reliable power supply monitoring
  • Control panels for industrial machinery and equipment

When it may not be suitable

This device is specifically designed for three-phase AC systems and is not suitable for single-phase applications or DC power circuits. It should not be used in environments where the operating voltage falls outside the specified 320-500V AC range, as this may result in inaccurate monitoring or device failure.

Key specifications

  • Operating voltage range: 320-500V AC
  • Contact configuration: 1 changeover contact
  • Current rating: 3A
  • Response delay: 0.45 seconds
  • Function: Phase sequence and phase failure monitoring

How to use

The relay is designed for standard DIN rail mounting within an electrical control cabinet. Wiring should be performed by a qualified technician in accordance with the provided technical documentation, ensuring that the three-phase supply lines are connected to the designated input terminals. Once installed, the device automatically monitors the phase sequence and status. If a phase failure or incorrect sequence is detected, the internal relay will switch, allowing the connected control circuit to trigger an alarm or shut down the equipment to prevent damage.

What to consider before purchase

  • Verify that your system voltage is within the 320-500V AC range
  • Ensure the 3A current rating is sufficient for your control circuit requirements
  • Confirm that the 0.45s response delay meets your specific application needs
  • Check available space in your control cabinet for DIN rail installation
Usage recommendations: Always ensure that the power supply is disconnected before performing any installation or maintenance work on the relay. Regularly inspect the device for signs of wear or loose connections to maintain optimal safety and performance.

Description

Machine translation. Load original

Similar products

{{product.title}} Show details Hide details

{{highlightedFeature.featureTitle}}:

{{getProductFeatureValueById(product, highlightedFeature.featureId)}}

{{product.price | formatAmount}}
Might be useful
{{product.manufacturerName}}
{{product.categoryName}}
{{product.title}}
{{product.specialPrice}}
{{product.price}}

Customer reviews

Customer questions

FAQ

How much does the Siemens 3UG4511-1AP20 Phase Sequence Monitoring Relay cost, and is it available for purchase?

The price is 104.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 14.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

Can Siemens 3UG4511-1AP20 Phase Sequence Monitoring Relay be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. We work with leading banks and leasing companies in Latvia, allowing you to make your purchase on convenient terms — with a minimal down payment and a repayment period from 3 to 36 months. You can apply for credit or installments for the Siemens 3UG4511-1AP20 Phase Sequence Monitoring Relay online, and the application process is as simple as possible:
  • Select the product on the website and add it to your cart;
  • When placing your order, choose the payment method “Installments”;
  • Fill in the required details for the lending partner;
  • Receive a decision within a few minutes.
For more information about available payment options, interest-free installment terms, and credit conditions in Latvia, please visit the Payment page.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All Siemens products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Siemens service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.
warranty
14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
shipping
Fast Delivery Get your orders as quickly as possible — right to your door, parcel lockers, or pickup points across Latvia and the EU.
payment
Secure Payment Pay the way you prefer: cash, VISA, MasterCard, Apple Pay, Google Pay, bank transfer, or 0% installment plan.
warranty
Quality Since 2008 AiO.lv has been on the market for over 18 years and has earned trust — with more than 6000 genuine positive reviews on Google.