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Black Box

Black Box USB to RS232 Opto-Isolated Converter

$265.81
$202.79 SAVE $63.02
2 availableas of 09/17/2026

Order within for shipment today

Should arrive by Wed, Sep 30 with free ground shipping

Compliance, certifications and origin

  • TAA compliant
  • RoHS
  • WEEE
  • Origin: United States
Rated excellent by our customers Read our reviews

Secure checkoutISO 9001:2015 and CMMC certifiedFamily owned since 1982

Free shipping on most items when you spend $100 or more.

Real people answer: chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.

Protect this device

Plans are optional and can be left off. Your order is unchanged unless you add one.

Secure checkoutISO 9001:2015 and CMMC certifiedFamily owned since 1982

Free shipping on most items when you spend $100 or more.

Real people answer: chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.

Overview

Convert and Protect Serial Interfaces

This compact USB-to-RS-232 opto-isolator enables you to connect an RS-232 serial device to a USB port while protecting equipment from voltage spikes, electrical noise, and ground loops. Ideal for industrial and mission-critical applications, it helps ensure reliable serial communications and safeguards connected devices from potentially damaging electrical disturbances.

The opto-isolator requires no PCI or ISA slots and does not consume system IRQ resources. Simply connect it to an available USB port using an optional USB Type-A to Type-B cable, and Windows automatically recognizes and configures the device as an additional COM port for quick, hassle-free installation.

Technical specifications

General Information

Manufacturer Black Box Corporation
Manufacturer Part Number SP385A-R3
Manufacturer Website Address http://www.blackbox.com
Brand Name Black Box
Product Model SP385A-R3
Product Name USB to RS232 Opto-Isolated Converter
Packaged Quantity 1
Product Type Transceiver/Media Converter

Interfaces/Ports

Total Number of Ports 2
USB Yes

Power Description

Power Source USB

Physical Characteristics

Height 0.8"
Width 1.7"
Depth 3"
Weight (Approximate) 6.40 oz

Miscellaneous

Package Contents
  • (1) USB to RS-232 Converter with Isolation
  • (1) USB cable (3-ft.)
  • Drivers on CD
  • Quick Start Guide
Green Compliant Yes
Country of Origin United States
TAA Compliant Yes
Environmental Compliance Restriction of Hazardous Substances (RoHS)Waste Electrical and Electronic Equipment Directive (WEEE)

Warranty

Limited Warranty 5 Year

Ratings and reviews

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Shipping and returns

Free shipping on most items when you spend $100 or more. In-stock items ship on the next open shipment slot. The buy box above shows the live order-by countdown and the estimated arrival date.

Need to send it back? Start a return online with a Request RMA and our team will take care of you. Keep the original packaging. Items must be returned in the condition received.

Questions about shipping or returns? Chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.