# Siemens 3TH4355-0AP0 Auxiliary Contactor, 230V AC 50Hz / 277V AC 60Hz, 5NO + 5NC

**URL:** https://aio.lv/en/product--siemens-3th43550ap0--1799683
**Data updated:** 2026-05-18 02:44 (EEST)
**Category:** Printer & Copier Parts
**Manufacturer:** Siemens
**Manufacturer code:** 3TH43550AP0
**EAN:** 4011209049291
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 91.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 76.02 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3th43550ap0--1799683

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3TH4355-0AP0 is a reliable auxiliary contactor designed for industrial control and switching applications. It features a 230V AC 50Hz / 277V AC 60Hz control coil and is equipped with 5 normally open (NO) and 5 normally closed (NC) contacts. This robust component ensures precise signal switching in electrical automation systems, providing high operational safety and long-term durability in demanding environments.

## Long description

The Siemens 3TH4355-0AP0 auxiliary contactor is a high-performance switching component engineered for industrial automation and control systems. Designed to handle complex signal switching tasks, this device provides reliable operation in demanding electrical environments. With its robust construction and precise contact configuration, it serves as a critical link in control circuits, ensuring consistent performance and operational safety for various industrial machinery and automation setups.
Advantages
This auxiliary contactor stands out due to its high contact density, offering 5 normally open and 5 normally closed contacts within a single compact unit. The design prioritizes long-term durability and resistance to environmental stress, making it suitable for continuous operation in industrial settings. Its standardized control coil voltage ensures compatibility with common power supplies, while the high-quality materials used in its construction minimize wear and tear, thereby reducing maintenance requirements over the product's lifespan.
Suitable for
Industrial automation control panels
Signal switching in complex electrical circuits
Interlocking and control logic applications
Integration into motor control centers
When it may not be suitable
This device is not intended for direct power switching of high-load motors or heavy-duty heating elements, as it is specifically designed for auxiliary control signals. It should not be used in environments that exceed its specified voltage or temperature ratings, as this may lead to premature failure or safety hazards.
Key specifications
Control coil voltage: 230V AC 50Hz / 277V AC 60Hz
Contact configuration: 5 normally open (NO) and 5 normally closed (NC)
Application: Auxiliary control and signal switching
Design: Industrial grade contactor
How to use
Installation should be performed by qualified personnel in accordance with local electrical regulations. The contactor is typically mounted on a standard DIN rail or via screw mounting within a control cabinet. Ensure that the control circuit voltage matches the coil specifications before connecting the wiring. Once mounted, connect the control signal wires to the coil terminals and the switching circuit wires to the respective NO and NC contact terminals. Verify all connections for tightness and ensure proper insulation before energizing the system.
What to consider before purchase
Verify that the control voltage of your system matches the 230V/277V coil rating.
Ensure the physical dimensions fit within your existing control cabinet space.
Confirm that the 5NO/5NC contact configuration meets your specific logic requirements.
Usage recommendations
Regularly inspect the terminal connections for tightness and check for any signs of dust or debris accumulation in the contact area to maintain optimal electrical conductivity and prevent overheating.

## FAQ

### How much does the Siemens 3TH4355-0AP0 Auxiliary Contactor cost, and is it available for purchase?

The price is 91.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 06.07.2026 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 3TH4355-0AP0 Auxiliary Contactor be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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. More information about warranty service: https://aio.lv/en/warranty

## Image

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