Industrial USB Hub FAQ

Sipolar is the industrial USB hub brand of Shenzhen Lpsen Technology Co., Ltd. (Lpsen), a manufacturer founded in Shenzhen, China in 2010. The Sipolar trademark was officially registered in 2012.

We design and manufacture industrial-grade USB hubs for automated test fixtures, production test benches, phone refurbishing and data wiping lines, self-service kiosks, robotics, charging cabinets, IT asset disposition (ITAD) and other professional device applications.

Lpsen operates a 4000 m² Industry 4.0 factory, has independent R&D with more than 100 product patents, and ships products to more than 100 countries worldwide.

The product range spans 4 to 64 ports and covers USB 2.0, USB 3.0, USB 3.2 Gen2 10Gbps, Type-C PD charging, galvanically isolated hubs, ESD-protected hubs, anti-locking hubs, per-port switch control, intelligent control and all-in-one mass production testers.

Four things, and each one is a specification you can verify on a datasheet:

• Wide-temperature hardware — industrial USB hubs operate from -25°C to +80°C, covering workshop, outdoor cabinet and factory-floor conditions. • Stable high-current output — per-port over-current and short-circuit protection, with total output bounded by each model's rated power. • EMC-conscious design and metal enclosures — metal housings with internal thermal management for continuous 7×24 operation. • Mounting options — wall, rack and DIN-rail mounting on selected models, not desktop-only housings.

We also support custom firmware and per-port power allocation for OEM/ODM projects, which consumer hubs cannot provide.

Product pages are available under each model in the Products section. For complete datasheets, dimensional drawings, or declaration of conformity documents, email marketing@sipolar.com with the model number and we will send them directly.

Most models are plug-and-play with no driver installation, supporting Windows 7/8/10/11, macOS 10.12 or later, and Linux / Ubuntu 16.04 or later.

The exception is the SH3 smart-control series: on Windows 10 it is driver-free, while Windows 7 requires the CH340G driver, which can be downloaded online or requested from us.

Yes. USB 3.0 hubs are backward compatible with USB 2.0 and 1.1 devices. The link runs at the speed of the slowest device connected.

No, and that is expected. The total bandwidth of the upstream link is shared across all downstream ports — this is a fundamental property of the USB architecture, not a limitation of our products. For everyday peripherals such as keyboards, mice, dongles, barcode scanners and storage devices, concurrent use is not a practical constraint.

It depends on the model:

• USB-B upstream — A-103, A-173, A-423, A-805P, FD-603, AX-143 and others • USB-C upstream — A-4U32M1 / M2 / M3, A-4U30M1, the FS series, FD-2A2C32H1 and others • Integrated cable (no upstream port) — A-4U30M1, FS-4A30H2

If you need a specific upstream connector, tell us the model and we will confirm.

Every port has independent over-current and short-circuit protection. Total output is bounded by the power supply of the specific model — with several high-draw devices connected at once, each port receives a reduced share of the total budget.

A separate adapter is not required. As long as the peripheral works when connected directly to a computer USB port, it will generally work through a hub downstream port. Bandwidth and power must still be sufficient.

Two numbers decide it: per-port maximum output current, and the total rated power of the unit.

• Per-port maximum output is the current one port can draw when used alone. • Total rated power is the ceiling for all ports combined.

When multiple ports draw power at once, each port's actual current is reduced according to the total power budget. If your load exceeds the supplied adapter's capability, a larger-rated adapter resolves it — this is a normal configuration choice, not a product defect.

Common model figures:

Yes, within reason. Select an adapter whose output voltage matches the model's rated input and whose current rating meets the load. For terminal-block models (the AT series and A-4A30M4), match the terminal type as specified in the datasheet (for example XH2.54 or VH3.96 2-pin).

Note that a few models take DC 5V input only; for those, the voltage must not be raised without confirmation from us.

Work through four questions in order:

1. What are you connecting? Peripherals only, or also HDDs and SSDs? High-speed capture equipment or camera arrays? This decides interface type and speed. 2. How much power do the devices draw? This decides per-port current and total power budget. 3. Where is it installed? Bench, wall, rack or DIN rail? This decides mechanical format and mounting options. 4. Do you need per-port control? Individual switching, current monitoring, or smart port management? This decides whether a standard model or the FS / SH3 series fits.

A quick reference:

• Most ports, strongest power headroom — A-103 (10 ports, per-port 5V/1.5A, ≤54W total) • Fewer ports, higher per-port current — A-173 (7 ports, per-port 5V/2A, ≤32W total) • Cables that get pulled or the unit is mounted on a moving platform — AT series with locking anti-detach connectors • 10Gbps transfer for large files or high-speed capture — A-4U32M1 / M2 / M3 (USB 3.2 Gen2) • Dozens of U-keys or dongles that need individual management — SH3-10 / SH3-15, with per-port switching and serial communication protocol • Every line needs its own on/off — FS-801 / FS-802 / FS-803 • Ground-loop or common-ground interference — AT-4A20M3, with USB and power isolation

The letter prefix indicates the design intent:

• A — general-purpose industrial desktop hubs, the mainstream range • AT — anti-detach connectors that lock against accidental disconnection, plus the isolation and terminal-block variants • FS — per-port mechanical on/off switch next to each port, for line-by-line control • SH3 — smart control with per-port switching driven by PC software, plus a serial communication protocol

• C — charging station and PD charging products • SH-96 / SH-192 — high-density rack-mount platforms for production lines

Yes. The AT-4A20M3 is a 4-port USB 2.0 hub with 3000V USB isolation and 3000V power isolation, DC 9-24V input (3-pin V+/V-/GND terminal), per-port 5V/1A, ≤20W total, measuring 93 × 70 × 34.8 mm, with reverse-polarity protection and a DIN-rail clip.

Isolation means the upstream and downstream sides do not share a common ground, which is useful in installations affected by ground loops or common-ground interference. It is a galvanic isolation specification; for applications with more demanding protection requirements, contact us so we can assess the case.

Each downstream USB port can be switched independently through PC software, and we provide the serial communication protocol. This suits U-keys, USB security keys, phones and tablets that need centralised on/off management. Port numbers can be fixed by binding them to USB port physical addresses in software.

On Windows 10 the SH3 series is driver-free; Windows 7 requires the CH340G driver.

Each port on an FS model has an independent control switch beside it. The switch cuts the 5V supply to that port, so a connected hard drive stops spinning. This is different from the operating system's "safely remove hardware", which disconnects data only while the drive keeps running. If you need data-only disconnection, use the eject function in your operating system.

Industrial USB hubs operate from -25°C to +80°C, covering standard workshop, outdoor cabinet and industrial floor conditions. Charging products (the C series and multi-slot charging stands) are rated 0-40°C, as they are a different product category.

For humidity specifications, please contact us for the figure applicable to your specific model.

At company level, Shenzhen Lpsen Technology Co., Ltd. holds ISO9001, CE, 3C, UL, ROHS and FCC certifications, and our product series have passed CE, FCC, ROHS and 3C.

At product level, certification markings are stated per model on the datasheet — most models carry CE, FCC and RoHS. Certificate numbers and scanned copies are available on request.

Adapter certification is separate from hub certification. Please confirm the marking on the specific model and the specific power supply you need.

The operating temperature range covers outdoor cabinet installation. However, no IP (ingress protection) rating is specified for these products, so for outdoor or dusty, humid installations we recommend adding a suitable protective enclosure.

The models below cover most enquiries. All specifications are taken from our product catalogue (2026.8.20 edition).

Desktop and small format • A-4U30 — 4 × USB-A 3.0, 5Gbps, max 5V/2.4A per port, DC 9-24V input (12V 2A adapter supplied) • A-173 — 7 × USB-A 3.0, 5Gbps, max 5V/2A per port, total ≤32W, DC 9-24V input (12V 3A adapter supplied) • A-103 — 10 × USB-A 3.0, 5Gbps, max 5V/1.5A per port, total ≤54W, DC 9-24V input (12V 5A adapter supplied) • A-4U32M1 — 4 × USB-A 3.2 Gen2, 10Gbps, max 5V/2.4A per port • A-4C32M5 — 4 × Type-C 3.2 Gen2, 10Gbps, 5V/1A per port, ESD Class 4

USB 2.0 multi-port • A-400 — 10 × USB-A 2.0, max 5V/2.1A per port, DC 9-24V input (12V 10A adapter supplied) • A-400C — 10 × Type-C 2.0, max 5V/2.1A per port, DC 9-24V input (12V 10A adapter supplied) • A-805P — 20 × USB-A 2.0, 5V/1.2A per port • A-812 — 30 × USB-A 2.0, max 5V/2.1A per port, 5V 60A power supply • A-832 — 32 × USB-A 2.0, 5V/1.5A per port, total ≤240W, 12V 10A × 2 adapters

USB 3.0 multi-port and rack • A-316 — 16 × USB-A 3.0, max 5V/1.5A per port • A-223 — 20 × USB-A 3.0, max 5V/2.1A per port, built-in 5V 40A industrial power supply, total ≤200W • A-423 — 10 × USB-A 3.0, max 5V/2.1A per port, DC 9-20V input (20V 6A adapter supplied) • A-165CP / A-165C — 16 × Type-C rack-mountable hubs

Intelligent control and charging • SH3-10 / SH3-20 — 10 and 20 port intelligent control hubs with per-port PC software switching • FS-801 / FS-802 / FS-803 / FS-804 — per-port switch control hubs • C-166PD — 16 × Type-C charging station, 65W per port (5V/3A to 20V/3.25A), built-in 24V/42A • C-165PD — 16 × Type-C charging station, 30W per port (5V/3A to 20V/1.5A) • C-105PD — 10 × Type-C charging station, 65W per port

Mass production testers • PC-3201 — 32-port all-in-one mass production tester, 12V 7A • PC-6401 — 64-port all-in-one mass production tester, 12V 10A

Match the port count to the number of devices, then check two things: per-port current and total power.

• A-4U30 (4 ports) — highest per-port current (2.4A), best for a few power-hungry devices • A-173 (7 ports) — 2A per port, ≤32W total, balanced for general desktop use • A-103 (10 ports) — 1.5A per port, ≤54W total, the most headroom for multi-disk or multi-device setups • A-223 (20 ports, USB 3.0) and A-812 (30 ports, USB 2.0) — for rack or cabinet deployment • A-832 (32 ports, USB 2.0) — the highest port count, dual 12V 10A adapters

Per-port current is the maximum for a single port. When several ports draw power at the same time, each port's actual current is capped by the model's total power rating. If your load exceeds the standard adapter, a higher-specification adapter can be supplied.

Rack and cabinet models (A-165CP, A-165C, A-220, A-223, A-213P, A-812, A-832, A-805P) use cold-rolled steel housings designed for rack or wall mounting.

Desktop models (A-4U30, A-173, A-103, A-400, A-400C, A-423) are supplied as desktop units. If you need a specific mounting arrangement — DIN rail, wall bracket or a custom bracket — tell us the model and mounting environment and we will advise on the available options.

We offer a 36-month product warranty service, along with ongoing technical support and maintenance throughout the product's service life.

The warranty covers manufacturing defects in the delivered product. It does not cover damage or failure caused by the customer's operating conditions — for example exceeding the rated input voltage, using a power supply outside the specified specification, reverse polarity, external surge or damage from liquids, impact or improper installation. If you have an application where the operating conditions may push the product outside its rated envelope, contact us before ordering and we will advise on the appropriate configuration.

Contact marketing@sipolar.com with the model, quantity, order reference and a description of the symptom. We will provide troubleshooting guidance first, and handle warranty claims for manufacturing defects. Replacement units and technical support are available throughout the product's service life.

Yes. Lpsen operates its own factory and R&D team, and we provide OEM and ODM service focused on serving global customers. Scope includes structural modification, firmware programming, customised power distribution, private-label packaging and silkscreen printing. Contact us with your requirements and we will confirm feasibility, tooling and minimum order quantity.