{{ totalProductsCount }}

In cart {{totalProductsCount}} item(s)

Total:
{{sum | formatAmount}}

Your cart is empty

header-product InLine 33307B Serial Converter Repeater and Isolator USB 2.0 to RS-232 Black
49.99 €

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

InLine 33307B USB 2.0 to RS-232 Serial Converter Photo 1
InLine 33307B USB 2.0 to RS-232 Serial Converter Photo 2
InLine 33307B USB 2.0 to RS-232 Serial Converter Photo 3
InLine 33307B USB 2.0 to RS-232 Serial Converter Photo 4
InLine 33307B USB 2.0 to RS-232 Serial Converter Photo 1
InLine 33307B USB 2.0 to RS-232 Serial Converter Photo 2
InLine 33307B USB 2.0 to RS-232 Serial Converter Photo 3
InLine 33307B USB 2.0 to RS-232 Serial Converter Photo 4

New arrival!

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

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

{{email}}
You keep track of price changes

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

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

Short 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.
Available for order: 45 pcs.
Warranty: 2 Years
SKU: 12649367
free shipment

Cheapest delivery:

Unisend LV

Pick-up points

Unisend LV

Cost

1.99 €

Deliver

{{selectedOffer.parcelStationDeliveryString}}

Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
22.10.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
27.10.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 1.00 kg)
Parcel couriers
Unisend LV / Venipak Pickup LV / Venipak Locker LV / DPD Paku skapis / Omniva LV / Latvijas Pasts pakomāts / Latvijas Pasts nodaļa
27.10.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.99 €
payment
Payment Methods:
Bank transfer
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 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.
All features
Dimensions (WxDxH): Dimensions of the product (Width x Depth x Height).
22 x 78 x 11
Weight: Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.
0.014 kg
Operating relative humidity (H-H):
5 - 95
Chipset: Set of electronic components in an integrated circuit that manages the data flow between the processor, memory and peripherals. It is usually found in the motherboard of a computer. Chipsets are usually designed to work with a specific family of microprocessors. Because it controls communications between the processor and external devices, the chipset plays a crucial role in determining system performance.
FT232RNL
Package weight: Weight of the packaged product.
30 g
Mac compatibility: Product can be used with Apple Mac software and/or hardware.
Yes
Operating temperature (T-T): The minimum and maximum temperatures at which the product can be safely operated.
-15 - 70
Height: The measurement of the product from head to foot or from base to top.
11 mm
Width: The measurement or extent of something from side to side.
22 mm
Depth: The distance from the front to the back of something.
78 mm
Product colour: The colour e.g. red, blue, green, black, white.
Black
Host interface: Interface that enables a host controller to communicate with a driver.
USB 2.0
Country of origin: Country where the device is made. Aka Country of manufacture (COM).
China
Package depth: The distance from the front to the back of the packaging.
165 mm
Package height: The distance from the top to the bottom of the packaging.
11 mm
Package width: The distance from one side of the packaging to the other.
100 mm
Package type: The type of product package e.g. box.
Polybag
Connector 1: This is the first connector in the device.
USB Type-A
Connector 2: This is the second connector in the device.
Terminal block
Output interface: The ports (sockets) where the device is connected via connectors and cables to external devices.
RS-232
RS-232 signals:
Rx, Tx, GND
Isolation:
2.5 kV
Baud rate:
921.6 Kbit/s
Windows operating systems supported: Windows vesions wich can be used with the device.
Windows 7, Windows 8, Windows 8.1, Windows 11, Windows 10
Mac operating systems supported: Mac operating systems e.g. OS X can be used with the device.
MacOS
Package volume:
200 cm³
Connector gender: To distinguish parts on a cable interface, connectors are grouped under genders. Sockets or jacks are considered to be female whilst plugs are referred to as male.
Male/Female

Description

Machine translation. Load original

Similar products

{{product.title}}
Show details Hide details

{{highlightedFeature.featureTitle}}:

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

{{product.price | formatAmount}}

Product comparison

The InLine 33307B Serial Adapter USB to RS232 Converter with Isolator is compared against similar interface converters from InLine, StarTech, MicroConnect, and ShiverPeaks. All these devices are designed to bridge legacy or specialized hardware with modern computers via USB. The main practical difference between them lies in the supported serial interface (RS232 versus RS485), the presence of galvanic isolation, and connector types.

⚙️ The specifications comparison table below contrasts parameters such as the interface type (RS232 vs RS485), the built-in isolator for noise protection, chipset characteristics, and physical connection types.

ParameterInLine 33307BInLine 33307DStarTech ICUSB232SM3InLine 33307CMicroConnect USB3.1CRS232ShiverPeaks 75602Practical significance
Interface typeRS232RS485RS232RS485RS232RS232Determines target device compatibility: RS232 suits standard peripherals, while RS485 targets industrial networks.
Galvanic isolationYesYesNoNoNoNoThe isolator protects equipment from electrical noise and ground loops, critical in laboratories and industrial environments.
ChipsetStandardStandardStandardFTDIStandardStandardThe FTDI chipset ensures enhanced compatibility across various operating systems.
Connection typeUSB to RS232USB-A to 4-pin terminalUSB 2.0 to DB9 (0.9 m cable)USB to RS485USB Type-C to RS232 (1.5 m)USB 2.0 to RS232 with LEDCable format and connector types affect physical connection convenience to the host and target device.

◎ The suitability table below evaluates which product best matches specific use cases based on data protection requirements and interface types.

Use caseRecommended productWhy
Industrial and lab environments prone to electrical interferenceInLine 33307B or InLine 33307DThe built-in isolator effectively prevents ground loops and ensures stable transmission in electrically noisy environments.
Data communication via RS485 standardInLine 33307D or InLine 33307CSupport the industrial RS485 interface rather than standard RS232.
Connecting to computers with a USB Type-C portMicroConnect USB3.1CRS232Features a built-in USB Type-C cable, eliminating the need for separate adapters.
Standard RS232 device diagnostics and configurationStarTech ICUSB232SM3 or ShiverPeaks 75602Provide straightforward cable solutions with fixed lengths or status LEDs for general tasks.

The InLine 33307B Serial Adapter USB to RS232 Converter with Isolator stands out from most competitors due to its built-in isolator, making it the optimal choice for professional environments where electrical interference protection is essential. If you require standard RS232 connectivity with enhanced signal security, this model is preferable over non-isolated cables from StarTech, MicroConnect, or ShiverPeaks. Meanwhile, for RS485 networks, the alternative InLine models should be selected.

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

Customer reviews

Customer questions

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 49.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 45 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 22.10.2026 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. 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.