Dual USB 3.0 'SuperSpeed' Filtered Interface — JRE USB3-2
Dual passive USB 3.0 Type-A interface with mode-selective filtering and 80 dB conducted attenuation from 50 MHz to over 6 GHz.
JRE USB3-2 specifications
- Outside dimensions
- 3.2" H x 3.2" W x 0.8" D (80 x 80 x 20 mm)
- Isolation
- 80 dB isolation in test system configuration
- Insertion Loss on Data lines
- less than 1.5 dB
- Data Line Balanced Impedance
- 90 Ohms typical
- DC Power line DC resistance
- 0.1 ohms
- DC Power line attenuation
- −20 dB @ 1 MHz, −80 dB @ 10 MHz to 6 GHz
- Conducted attenuation
- 80 dB, 50 MHz to over 6 GHz, per channel
- USB Inside connector
- USB 3.0 Type A Female
- USB Outside connector
- USB 3.0 Type A Female
- Cable included
- Type A Male to Male jumper cables (one per channel)
- Power capability
- USB standard or up to 50 VDC at 1 amp; DC resistance each leg 0.1 ohms max
- Mounting screws
- 4-40, included
- Clearance hole size
- 0.1285" diameter - #30 or 3.3mm drill
- Data rate
- 5 Gbps, often up to 10 Gbps
JRE USB3-2 overview
SuperSpeed changes the filter decision: the data occupies the same wireless bands you are trying to keep outside the enclosure. I designed the JRE USB3-2 to handle that problem for two independent USB channels in one machined-aluminum housing. The filter discriminates by signal mode.
- USB 3.0 Type A Female connectors support USB 1.1, 2.0, and 3.x.
- Fully passive copper paths preserve normal device enumeration on both channels.
- At SuperSpeed rates, a plain low-pass filter would attenuate wanted data with the interference.
- Differential USB data passes unfiltered; common-mode RF interference is filtered out.
- Each channel provides 80 dB conducted attenuation from 50 MHz to over 6 GHz.
- Data lines: less than 1.5 dB insertion loss; 90 Ohms typical balanced impedance.
- Each channel appears to the link as roughly 1 to 1.5 m of USB cable.
- Included jumpers reliably pass 5 Gbps, often up to 10 Gbps, depending on devices and cabling.
That distinction lets high-speed data and RF rejection coexist. Cable budget still determines the achieved rate. At $950.00, specify the USB3-2 for two SuperSpeed paths; choose the JRE USB3-1 for one. For the fastest rates over longer runs, use an active cable on the external side.
Which USB filter do I need? The USB 2-1 is a low-pass filter, the right pick at USB 2.0 speeds. The USB 3-1 uses signal phasing for USB 3 SuperSpeed. The USB C-1 puts that same architecture on a USB-C connector. The USB3-2 on this page is the two-channel version of the USB 3-1.
Go deeper
Used in: High-Speed Data
- USB 3 and USB-C Special Considerations Why high-speed USB drops to 2.0 through an RF filter, what speeds to expect at 5/10/20/40 Gbps, and when an active cable is required for the test setup.
- Understanding data signals through filtered I/O The three filtering approaches — capacitive, low-pass, signal-phasing — and when each one applies.
- The effect of adding multiple I/O filters The weakest-link principle and the 3 dB-per-doubling rule for your system isolation budget.
- Interface & connector guide Match every connector and capacitance value to your signal type on the removable I/O plate.
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