DJM-AUSB3

USB 3.1

Active USB 3.1 Gen 2 EMI Filter

The ACTIV USB 3.1 is the world's most advanced active USB EMI filter, delivering 100dB shielding effectiveness from 10kHz to 40GHz for USB connections from USB 1.1 Low Speed through USB 3.1 Gen 2 SuperSpeed+ at 10Gbps. Proprietary Digital Signal Processing (DSP) technology faithfully reproduces USB signals while suppressing both radiated and conducted emissions with no signal leakage on either side of the enclosure wall. Unlike fiber-based USB isolators that generate their own radiated emissions inside the shielded enclosure, the ACTIV USB 3.1 is electromagnetically quiet on both sides of the wall. Supports USB Power Delivery 3.0 up to 60W through the same shield penetration. Made in the USA.

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Product PhotographyMachined aluminum housing, 3.96″ × 3.04″ × 1.05″

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Data Rate 1.5 Mb/s — 10 Gb/s

Interface USB-C

USB Power 60W / USB PD 3.0

Attenuation >100 dB

Frequency 10 kHz — 40 GHz

Filter Performance Performance

100dB Shielding Effectiveness.
USB 3.1 Gen 2. SuperSpeed+.

The ACTIV USB 3.1 employs proprietary DSP technology to actively reconstruct USB signals without interference across all USB standards from USB 1.1 through USB 3.1 Generation 2. The DSP engine operates at line rate — faithfully reproducing signals from Low Speed (1.5 Mb/s) through SuperSpeed+ (10 Gb/s) while eliminating both radiated and conducted EMI. No signal leakage. No latency. Transparent to USB enumeration and invisible to connected devices.

The ACTIV USB 3.1 supports USB Power Delivery 3.0, passing filtered power profiles from 15W to 60W through the same single shield penetration — no separate power penetration required. ESD and transient voltage suppressors, inrush current limiters, and gas discharge tubes protect against unanticipated voltage and current surges. The DJM Universal Mounting System accommodates wall thicknesses from 1/8 inch to over 11 inches with standard penetrations of 1″, 3″, 9″, and 12″. Custom lengths available for any wall thickness.

Proprietary DSP Technology

Actively reconstructs USB signals at line rate without conducted or radiated EMI. Transparent to USB enumeration and invisible to connected devices across all speeds from USB 1.1 Low Speed through USB 3.1 Gen 2 SuperSpeed+ at 10Gbps.

USB Power Delivery 3.0

Passes filtered USB PD 3.0 power profiles from 15W to 60W through the same shield penetration. Power profile automatically negotiated by the filter. No separate power penetration required.

Military-Grade Construction

Machined from solid aluminum with electroless plated nickel finish. ESD and transient voltage suppressors, inrush current limiters, and gas discharge tubes on all signal lines. Built for harsh environments and long service life.

Universal Mounting System

Mounts to any RF shielded enclosure or shielded room from any manufacturer. Standard penetration lengths of 1″, 3″, 9″, and 12″ accommodate wall thicknesses from 1/8 inch to over 11 inches. Custom lengths available for any wall thickness.

Technical Specifications

Complete Electrical and Mechanical Specifications.

Filter Performance

Shielding Effectiveness	>100dB from 10kHz to 40GHz (typical) Tested without cables attached, per IEEE 299-2006 methodology adapted for filter characterization.
“Installed SE”	>100dB from 10kHz to 40GHz (typical, cable-independent) The DSP signal reconstruction removes EMI at the filter boundary regardless of external cable type or shielding quality. “Installed SE” tracks filter SE across all cable configurations.
Insertion Loss	>90dB from 1kHz to 40GHz (typical) Insertion Loss performance measured using a method based on MIL-STD-220B.
Radiated and Conducted Emissions	Exceeds MIL-STD-461 CE102 Exceeds MIL-STD-461 RE102 Exceeds FCC Part 15 A, B Exceeds EN 55032 Class A, B
	ACTIV™ EMI filters are active filters and produce a limited amount of radiated emissions inside the shielded enclosure. Please contact DJM Electronics for information regarding your particular application.

USB Performance

Data Line Impedance	90Ω (typical)
USB 2.0 Supported Speeds	Low Speed (LS) — 1.5 Mb/s Full Speed (FS) — 12 Mb/s High Speed (HS) — 480 Mb/s
USB 3.1 Supported Speeds	SuperSpeed (SS) — 5 Gb/s SuperSpeed+ (SS+) — 10 Gb/s
USB PD Profiles	15W (Up to 3A @ 5VDC) 27W (Up to 3A @ 9VDC) 45W (Up to 3A @ 15VDC) 60W (Up to 3A @ 20VDC)
Communication and Power Protocols	USB 1.0 · USB 1.1 USB 2.0 · USB 2.0 Revised USB 3.0 · USB 3.1 Gen 1 and 2 USB 3.2 Gen 1x1 and 2x1 USB Type C Specification 1.0 IEC 62680-1-3 USB-PD Rev 2.0

Construction

Housing	Aluminum w/Electroless Plated Nickel
Dimensions	3.96″ × 3.04″ × 1.05″ (100.6 × 77.2 × 26.7mm)
Mounting	DJM Universal Mounting System 1-20 UNEF-2A Mounting Stub for Threaded Penetration 1″ NPS threaded penetration w/brass mounting flange nut and mesh gasket 1″, 3″, 9″, 12″, or custom length threaded penetration
Connectors	USB-C Jack (×2) 4-Pin DIN Jack (power input)
Indicators	Power: Red when power is present. High Voltage: Yellow when >5VDC at output.
Power	Input: 100-240VAC, 50/60Hz Output: +24V / 3.75A minimum, via supplied power adapter (Marked "LPS" or "Class 2" Only) DC Plug: 4-Pin DIN Pin assignment: Pins 1/4 positive · Pins 2/3 ground
Warranty	2 years. View warranty terms

Environmental

Operating Temperature	0°C to 40°C (32°F to 104°F) continuous
Humidity	5% to 90% non-condensing

Safety and Regulatory

RoHS Compliance	RoHS 3 compliant (Directive 2011/65/EU as amended by 2015/863). Self-declared.
REACH SVHC	No Substances of Very High Concern above the 0.1% threshold. Self-declared based on supplier documentation.
California Proposition 65	No known Proposition 65 listed substances above notification thresholds.
Conflict Minerals	Dodd-Frank Section 1502 compliance program in place. Reasonable country of origin inquiry conducted with component suppliers.
Country of Origin	United States. Made in the USA.