# InLine 33307B Serial Converter Repeater and Isolator USB 2.0 to RS-232 Black

**URL:** https://aio.lv/en/product--inline-33307b--12649367
**Data updated:** 2026-09-19 04:24 (EEST)
**Category:** Serial & Parallel Cables
**Manufacturer:** InLine
**Manufacturer code:** 33307B
**EAN:** 4043718353132
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 46.99 €
**Prices and availability valid until:** 2026-10-25 23:59
**Price without VAT (21%):** 38.83 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--inline-33307b--12649367

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.10.2026 | free |
| Pickup points | 28.10.2026 | 1.99 EUR |
| Courier delivery to door | 28.10.2026 | 4.99 EUR |

## Summary description

The InLine 33307B is a reliable USB 2.0 to RS-232 serial converter, repeater, and isolator designed for stable data communication and equipment protection. It bridges legacy serial devices with modern computers featuring USB ports. Ideal for industrial, office, and laboratory applications, this device ensures signal integrity and galvanic isolation in demanding environments. Compatible with various Windows and macOS operating systems, it provides seamless integration for professional and personal setups.

## Long description

The InLine 33307B Serial Converter Repeater and Isolator USB 2.0 to RS-232 Black is a reliable and professional device designed to bridge modern computer systems with legacy serial hardware. It functions as a robust USB 2.0 to RS-232 serial converter, repeater, and signal isolator, ensuring stable data communication and comprehensive equipment protection in demanding environments. By utilizing an integrated FTDI FT232RNL chipset, this device provides dependable data transmission and creates a virtual COM port for seamless software integration. Built-in galvanic isolation and multiple protective mechanisms safeguard connected hardware from electrical interference, making it an essential tool for industrial, laboratory, and office applications.
Advantages
This converter features advanced galvanic isolation of up to 2.5 kV, which effectively prevents direct electrical connection between the USB and RS-232 sides to eliminate ground loops and potential differences. High operational reliability is achieved through an integrated isolated DC/DC converter, a 200 mA PTC fuse, electrostatic discharge protection, and transient voltage suppression diodes. The unit operates reliably across a wide temperature range and supports a variety of operating systems, ensuring long-term durability and versatile deployment.
Suitable for
Connecting legacy RS-232 serial devices to modern computers with USB-A ports
Industrial automation and control environments requiring signal isolation
Laboratory setups and testing equipment integration
Data communication requiring protection against electrical interference
When it may not be suitable
This device may not be suitable if your application requires full RS-232 control signals, as it only supports TX, RX, and GND signals via the 4-pin screw terminal. It is also not designed for non-serial USB peripherals or applications requiring network-based serial communication.
Key specifications
Host interface: USB 2.0 Type-A
Output interface: RS-232 via 4-pin screw terminal
Supported signals: TX, RX, GND
Transmission speed: 300 to 921,600 bps
Galvanic isolation voltage: Up to 2.5 kV
Chipset: FTDI FT232RNL
Operating temperature range: -40 °C to +85 °C
Dimensions: 22 mm width, 78 mm depth, 11 mm height
Color: Black
How to use
Connect the USB Type-A cable of the converter to an available USB port on your computer. Connect your RS-232 serial device to the 4-pin screw terminal matching the TX, RX, and GND connections. Install the appropriate drivers if necessary for your operating system to establish a virtual COM port, allowing your existing serial communication software to interact with the connected hardware without modification.
What to consider before purchase
Verify that your legacy equipment uses standard RS-232 communication with TX, RX, and GND signals only.
Ensure compatibility with your operating system, such as Windows, macOS, Linux, or Android.
Check the physical connection requirements to ensure the 4-pin screw terminal suits your installation setup.
Usage recommendations
Always verify correct wiring of the TX, RX, and GND lines at the screw terminal before powering on the system, and ensure that operating environment humidity remains within the non-condensing range of 5% to 95% RH.

## Specifications

| Feature | Value |
|---|---|
| Dimensions (WxDxH) | 22 x 78 x 11 |
| Weight | 0.014 kg |
| Operating relative humidity (H-H) | 5 - 95 |
| Chipset | FT232RNL |
| Package weight | 30 g |
| Mac compatibility | Yes |
| Operating temperature (T-T) | -15 - 70 |
| Height | 11 mm |
| Width | 22 mm |
| Depth | 78 mm |
| Product colour | Black |
| Host interface | USB 2.0 |
| Country of origin | China |
| Package depth | 165 mm |
| Package height | 11 mm |
| Package width | 100 mm |
| 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 |
| Baud rate | 921.6 Kbit/s |
| Windows operating systems supported | Windows 7, Windows 8, Windows 8.1, Windows 11, Windows 10 |
| Mac operating systems supported | MacOS |
| Package volume | 200 cm³ |
| Connector gender | Male/Female |

## FAQ

### How much does the InLine 33307B USB 2.0 to RS-232 Serial Converter cost, and is it available for purchase?

The price is 46.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 44 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 23.10.2026 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/12649367/69832483_large.webp