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header-product InLine 33307A Serial Converter Repeater Isolator USB 2.0 to RS-232 Black
30.49 €

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

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

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

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Short description

InLine 33307A serial converter, repeater, and isolator featuring USB 2.0 and RS-232 interfaces in a black enclosure. Designed for reliable data transmission and device communication in industrial or office environments. Compatible with Windows and Mac operating systems.
Available for order: 46 pcs.
Warranty: 2 Years
SKU: 12649366
free shipment

Cheapest delivery:

Unisend LV

Pick-up points

Unisend LV

Cost

1.99 €

Deliver

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
26.10.2026 {{selectedOffer.officeDeliveryString}}
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Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
29.10.2026 {{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
29.10.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.99 €
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Product information

Description

The InLine 33307A Serial Converter Repeater Isolator USB 2.0 to RS-232 Black is a specialized hardware solution designed to bridge the gap between modern computer systems and legacy serial equipment. This device functions as a converter, repeater, and isolator, ensuring stable and protected communication between host systems and serial peripherals. Built with high-quality components, it provides a dependable virtual COM port connection suitable for industrial, commercial, and professional technical environments where reliable data exchange is critical.

Advantages

The unit features advanced integrated protection circuits on both the USB and RS-232 interfaces, including a PTC fuse, ESD protection, and TVS diodes, which safeguard connected hardware against electrical surges and electrostatic discharge. Its reliable FTDI chipset guarantees stable performance and broad driver compatibility across multiple operating systems. The inclusion of a 4-pin screw terminal block allows for flexible and secure wiring, accommodating ground connections and cable shielding to minimize signal interference in demanding operational settings. Additionally, clear status indicators for power, transmission, and reception provide real-time visual feedback for easier troubleshooting and system monitoring.

Suitable for

  • Connecting legacy RS-232 serial devices to modern computers via USB 2.0
  • Industrial automation, machinery configuration, and equipment diagnostics
  • IT maintenance, laboratory setups, and serial data transmission
  • Point-to-point communication setups requiring extended signal reliability

When it may not be suitable

This device is not designed for multi-drop network topologies, as it supports strictly point-to-point communication modes. It may also be unnecessary for users working exclusively with modern peripheral interfaces that do not rely on legacy serial communication standards.

Key specifications

  • Host interface: USB 2.0 via USB Type-A connector
  • Output interface: RS-232 via 4-pin terminal block
  • Pin configuration: GND, TX, RX, GND
  • Supported baud rates: 300 to 921,600 bps
  • Chipset: FTDI FT232RNL
  • Physical dimensions: 22 mm width, 78 mm depth, 11 mm height
  • Color: Black
  • Supported operating systems: Windows 7, 8, 8.1, 10, 11, Linux, macOS, Android
  • Operating temperature range: -15 °C to +70 °C

How to use

To begin using the device, connect the USB-A end of the converter to an available USB port on your computer. Connect your serial device wires to the designated pins on the 4-pin screw terminal block, ensuring proper alignment of transmit, receive, and ground lines. Install the appropriate drivers for the integrated chipset if required by your operating system, which will create a virtual COM port. Once configured, you can initiate communication through your standard serial terminal or control software using the established virtual port parameters.

What to consider before purchase

  • Verify that your peripheral equipment utilizes an RS-232 serial interface compatible with a terminal block connection.
  • Check your operating system version to ensure proper driver support for the internal chipset.
  • Assess your physical wiring requirements to ensure the distance limitations for USB and RS-232 connections are respected.

Usage recommendations

For optimal performance and longevity, ensure that all cable shields and ground connections are properly secured to the designated terminal pins, especially in environments with high electromagnetic interference. Avoid exceeding the recommended cable length limits for both USB and RS-232 runs to maintain signal integrity.

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.
FTDI FT232RNL
Package weight: Weight of the packaged product.
33 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.
22 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
Baud rate:
921.6 Kbit/s
Windows operating systems supported: Windows vesions wich can be used with the device.
Windows 7, Windows 10, Windows 11, Windows 8.1, Windows 8
Mac operating systems supported: Mac operating systems e.g. OS X can be used with the device.
MacOS
Package volume:
400 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

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Product comparison

Comparing the InLine 33307A with alternatives such as the InLine 33307D, InLine 33304X, InLine 33307E, Manhattan USB-A to Serial Converter Cable, and HP USB to Serial Port Adapter reveals that all these products bridge the gap between modern computers via USB-A and legacy serial equipment. The main differences lie in the communication standards supported (RS-232 versus RS-485), the inclusion of specialized protections like isolators or lightning surge protection, and the physical terminal or connector type.

⚙️ Below is a comparison of key specifications, including interface types, connection formats, protective features, and practical applications.

ParameterInLine 33307AInLine 33307DInLine 33304XInLine 33307EManhattan USB-A to SerialHP USB to SerialPractical Conclusion
Interface TypeUSB-A to RS-232USB-A to RS-485USB-A to RS-232USB-A to RS-485USB-A to RS-232USB-A to RS-232Selection depends on the required communication protocol: RS-232 suits standard peripheral setups, while RS-485 is tailored for industrial network distances.
Connection Format4-pin terminal block4-pin terminal blockRS-232 cable connector4-pin terminal blockDB9 (COM) connectorsDB9 (COM) connectorsTerminal blocks offer flexibility for custom wiring and industrial automation, whereas DB9 connectors fit standard plug-and-play serial ports.
Special FeaturesStandard stable transmissionBuilt-in isolatorCable gender changer adapterLightning protectionProlific PL-2303RA chipWindows OS compatibilityThe 33307D and 33307E models introduce advanced environmental protections, while the other solutions focus on standard office or retail applications.

◎ The table below evaluates use cases and buyer profiles to help determine which product best fits specific requirements.

Use CaseRecommended ProductWhy
Industrial automation using RS-232 with terminal wiringInLine 33307ABest suited for automation, programming, and legacy device integration requiring a direct RS-232 terminal connection.
Industrial networking requiring surge or signal isolationInLine 33307D or InLine 33307EThe built-in isolator in model 33307D and lightning protection in model 33307E ensure secure transmission in harsh environments.
Connecting standard office serial peripherals like modems or scannersManhattan USB-A to Serial or HP USB to SerialFeaturing standard DB9 connectors and cable designs, they seamlessly integrate into everyday office and point-of-sale setups.

The InLine 33307A is ideal if you need a dependable USB-to-RS-232 conversion utilizing a terminal block for specialized industrial or programming environments. Unlike alternatives using DB9 connectors or the RS-485 standard, this adapter directly addresses wired terminal applications requiring stable legacy equipment integration.

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Customer reviews

Customer questions

FAQ

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

The price is 30.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 46 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 26.10.2026 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.
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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.
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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.