# Siemens 3UG4621-1AW30 Single-Phase Current Monitoring Relay 0.02-0.5A 24-240V AC/DC

**URL:** https://aio.lv/en/product--siemens-3ug4621-1aw30--1797675
**Data updated:** 2026-05-18 02:44 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3UG4621-1AW30
**EAN:** 4011209642409
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 208.99 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 172.72 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3ug4621-1aw30--1797675

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3UG4621-1AW30 is a high-precision single-phase current monitoring relay designed for industrial automation and electrical protection. It features an adjustable current range of 0.02-0.5A and a wide input voltage range of 24-240V AC/DC. With a configurable time delay of 0.1-20 seconds, this relay ensures reliable monitoring of electrical circuits, preventing overcurrent or undercurrent conditions in various control systems.

## Long description

The Siemens 3UG4621-1AW30 is a high-precision single-phase current monitoring relay engineered for robust electrical protection and industrial automation. This device provides reliable oversight of electrical circuits by continuously measuring current levels and triggering a response when values deviate from the set thresholds. Its compact design and versatile power supply compatibility make it an essential component for maintaining system integrity in diverse control environments.
Advantages
This monitoring relay offers exceptional flexibility through its wide input voltage range, allowing it to operate seamlessly on both AC and DC power sources. The adjustable current monitoring range ensures precise control over sensitive equipment, while the configurable time delay feature prevents nuisance tripping caused by brief, harmless current fluctuations. Its digital interface facilitates accurate settings, ensuring that the relay responds exactly according to the specific requirements of the application.
Suitable for
Monitoring current in industrial automation systems
Protecting motors and sensitive electronic components from overcurrent
Detecting undercurrent conditions in control circuits
Integration into electrical panels for process monitoring
When it may not be suitable
This relay is designed specifically for single-phase applications and is not suitable for monitoring three-phase electrical systems. Additionally, it is intended for low-current monitoring within the 0.02-0.5A range and cannot be used for high-power industrial loads exceeding these specified limits.
Key specifications
Current monitoring range: 0.02-0.5A
Supply voltage: 24-240V AC/DC
Adjustable time delay: 0.1-20 seconds
Monitoring type: Single-phase current
Mounting type: DIN rail
How to use
The relay is designed for standard DIN rail mounting within an electrical enclosure. Once mounted, connect the power supply to the designated terminals and wire the circuit to be monitored through the current sensing input. Use the front-facing controls to set the desired current threshold and the required time delay. After configuration, the device will automatically monitor the circuit and switch the output contact if the current exceeds or falls below the defined parameters.
What to consider before purchase
Verify that the current range of your application falls within 0.02-0.5A
Ensure the control voltage matches the 24-240V AC/DC specification
Check available space on the DIN rail for installation
Confirm that the application requires single-phase monitoring only
Usage recommendations: Regularly test the relay functionality during scheduled maintenance to ensure the trip thresholds remain accurate and the output contacts are free from oxidation or wear.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.155 kg |
| Product colour | Black, Grey |
| Country of origin | Germany |
| Package depth | 107 mm |
| Package height | 29 mm |
| Package width | 99 mm |
| AC input frequency | 50 - 60 |
| AC input voltage | 24 - 240 |

## FAQ

### How much does the Siemens 3UG4621-1AW30 Current Monitoring Relay cost, and is it available for purchase?

The price is 208.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 16.07.2026 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 3UG4621-1AW30 Current Monitoring Relay 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

### Where can I download the instructions for Siemens 3UG4621-1AW30 Current Monitoring Relay?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

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