# InLine 33307E USB 2.0 to RS-232 serial converter repeater isolator with lightning protection in black

**URL:** https://aio.lv/en/product--inline-33307e--12649370
**Data updated:** 2026-09-13 04:13 (EEST)
**Category:** Serial & Parallel Cables
**Manufacturer:** InLine
**Manufacturer code:** 33307E
**EAN:** 4043718353163
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 35.49 €
**Prices and availability valid until:** 2026-10-17 23:59
**Price without VAT (21%):** 29.33 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--inline-33307e--12649370

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.10.2026 | free |
| Pickup points | 20.10.2026 | 1.99 EUR |
| Courier delivery to door | 20.10.2026 | 4.99 EUR |

## Summary description

The InLine 33307E is a versatile serial converter, repeater, and isolator designed to bridge USB 2.0 and RS-232 interfaces with integrated lightning protection. It ensures reliable data transmission and equipment safety in various professional and industrial setups. Compatible with a wide range of Windows and macOS operating systems, this device offers seamless connectivity and easy integration for legacy serial equipment.

## Long description

The InLine 33307E USB 2.0 to RS-232 serial converter repeater isolator with lightning protection in black is designed to bridge modern USB interfaces with legacy serial hardware. It ensures stable and secure data communication in demanding professional environments. Featuring robust electrical protection and wide operating system compatibility, this device prevents data loss and safeguards connected equipment against electrical surges.
Advantages
This serial converter provides exceptional operational safety through integrated lightning, overvoltage, and electrostatic discharge protection mechanisms. The reliable chipset guarantees stable virtual COM port communication across extended distances while supporting high data transfer rates. Additionally, automatic hardware-based direction switching simplifies installation by eliminating the need for manual software configuration during half-duplex operation, making it an efficient solution for complex networks.
Suitable for
Connecting modern computers to legacy serial devices
Industrial automation and control systems
Building automation and energy monitoring setups
Measurement and control technology applications
When it may not be suitable
This device is not designed for direct consumer applications that do not utilize serial communication standards. It may also be unnecessary for short-range, isolated office environments lacking potential electrical interference risks.
Key specifications
Host interface: USB 2.0
Output interface: RS-232
Connector types: USB Type-A and terminal block
Maximum baud rate: 512 Kbit/s
Dimensions: 22 mm width, 75 mm depth, 11 mm height
Color: Black
How to use
Connect the device to an available USB port on your computer using a compatible USB cable. Attach the serial wiring to the terminal block interface following the correct pin assignment. Install the appropriate drivers if required by your operating system, and the virtual COM port will be ready for data transmission.
What to consider before purchase
Verify that your legacy equipment utilizes an RS-232 serial interface
Check operating system compatibility with your current hardware setup
Assess whether integrated lightning and surge protection is necessary for your environment
Usage recommendations
Ensure that all wiring is securely connected to the terminal blocks and that proper grounding is maintained to optimize the effectiveness of the integrated lightning and surge protection features.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.014 kg |
| Operating relative humidity (H-H) | 5 - 95 |
| Chipset | FTDI FT232RNL |
| Mac compatibility | Yes |
| Operating temperature (T-T) | -15 - 70 |
| Height | 11 mm |
| Width | 22 mm |
| Depth | 75 mm |
| Product colour | Black |
| Host interface | USB 2.0 |
| Country of origin | China |
| Package type | Polybag |
| Connector 1 | USB Type-A |
| Connector 2 | Terminal block |
| Output interface | RS-232 |
| RS-232 signals | Rx, Tx, GND |
| Isolation | 2.5 kV |
| Electrostatic Discharge (ESD) protection | 15 kV |
| Baud rate | 512 Kbit/s |
| RS-485 signals | GND |
| Windows operating systems supported | Windows 8, Windows XP, Windows 10, Windows 11, Windows 8.1, Windows 7 |
| Mac operating systems supported | MacOS |
| Connector gender | Male/Female |

## FAQ

### How much does the InLine 33307E USB to RS-232 Serial Converter cost, and is it available for purchase?

The price is 35.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 50 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 15.10.2026 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. All transactions are 100% secure and encrypted.

### 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 InLine 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 InLine 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

https://aio.lv/img/cache/product/12649370/69832495_large.webp