USB Isolator

The SEGGER USB Isolator (part number 8.07.02) is a host-side galvanic isolation adapter that sits between the host PC and a J-Link debug probe or Flasher production programmer. It provides 3 kV basic isolation at USB Full-Speed, the protective layer embedded teams need when debugging motor control boards, inverters, EV powertrain electronics, or any target where the host ground is not the same as the target ground. Teams in India working on high-voltage development and noisy USB-hub environments use it to protect laptops and workstations from overvoltage transients that can otherwise destroy a USB controller.

How It Protects Your Host and Target

SEGGER’s isolation accessories cover two different risk surfaces. Target-side isolators, the J-Link Isolator and Flasher Isolator, sit between the probe and the target’s JTAG/SWD connector, galvanically isolating the debug signals at the target end. The USB Isolator is different: it sits between the host PC and the probe, isolating the USB link itself. In SEGGER’s own words, “the Isolator electrically separates the host from the J-Link and target system. It protects the J-Link and target hardware, but also secures the host PC against overvoltage from the target.”

That host-side protection matters most when the development tool is not connected to the same ground as the application under test, and when low-budget or industrial USB hubs introduce electrical spikes. SEGGER explicitly recommends the USB Isolator for motor control development, inverter applications, and any high-voltage work. For comprehensive protection, SEGGER recommends combining the USB Isolator with a target-side JTAG or SWD Isolator, the two accessories address different failure modes and are not substitutes for each other.

Features

Feature	Specification
Isolation Type	Basic galvanic isolation
Isolation Voltage	3 kV DC for 1 second
USB Version	USB 2.0 Full-Speed
Data Rate	12 Mbit/s
Propagation Delay	70 ns maximum
Max Output Current	200 mA with overload protection
Overload Protection	Built-in, with red/orange LED indicator
Power LED	Green
Short Circuit Protection	Yes
Connectors	USB Micro-B (host side), USB Type-A (device side)
Dimensions	4.5 × 5 × 0.5 inches (~114 × 127 × 13 mm)
Weight	0.5 lbs (~227 g)
Part Number	8.07.02
Installation	Inline between host PC and J-Link or Flasher, no configuration required

Compatibility

The USB Isolator works with SEGGER’s full range of debug probes and production programmers:

J-Link debug probes: J-Link BASE Classic, J-Link BASE Compact, J-Link PLUS Classic, J-Link PLUS Compact, J-Link PRO, J-Link Ultra+, and J-Link WiFi. J-Trace families are also supported.

Flasher production programmers: Flasher Compact, Flasher PRO, Flasher PRO XL, Flasher Portable PLUS, and the legacy Flasher ARM.

Installation is plug-and-play: connect the USB Isolator between the host PC and the USB connector of the J-Link or Flasher. No driver installation, no firmware update, no configuration changes to the debug or programming workflow.

Typical Applications

• Motor control and motor drive development
• Inverter and power-electronics development
• EV battery management and traction inverter bring-up
• Mains-connected supplies and grid-tied equipment
• Industrial drives, PLCs, and automation controllers
• Production lines with noisy or low-quality USB hub environments
• Any development bench where host ground differs from target ground

Why Buy from GSAS

GSAS Micro Systems is SEGGER’s authorized engineering partner in India. We supply the USB Isolator along with J-Link probes, Flasher production programmers, and the matching J-Link and Flasher Isolators with local INR invoicing, GST documentation, and pre-sales engineering support from our offices in Bengaluru, Hyderabad, Chennai, Pune, Mumbai, and Delhi NCR. For teams specifying a full high-voltage debug setup, we help scope the right combination of host-side (USB Isolator) and target-side (JTAG/SWD Isolator) protection for your target.

Safety note: SEGGER specifies this as basic isolation (not reinforced or medical-grade). Do not use in medical, high-voltage safety, or IEC 60601 applications without further engineering evaluation.