TENS Unit For Back Pain

B2B dual-channel TENS units engineered for lumbar back pain. Features high-mA output, independent step-up transformers, and strain-relieved lead wires to penetrate thick adipose tissue.

This TENS unit is a dedicated electrotherapy generator engineered for the anatomical and electrical demands of the lumbar and thoracic spine. Unlike generic mini-stimulators, this hardware is calibrated to deliver the higher current densities required to penetrate the thicker adipose and muscle layers of the lower back. It targets the dorsal rami nerves to gate chronic pain signals at the spinal cord level. We supply this assembled PCBA and structural housing to chiropractic networks, physical therapy distributors, and OTC orthopedic wearable brands.

The core PCBA utilizes independent discrete step-up transformers for each channel, ensuring the peak voltage does not collapse when four large electrodes are applied to the lower back simultaneously. The central microcontroller (MCU) synthesizes asymmetrical biphasic square waves, explicitly avoiding a net DC charge imbalance that causes severe skin irritation under large back pads. The hardware architecture incorporates heavy-duty female receptacles and strain-relieved lead wires to withstand the mechanical shear forces generated when a patient sits or lies directly on the cables. Standard OEM production runs dictate an MOQ of 2,000 units.

• High-mA Lumbar Penetration 

  The lower back presents a significantly higher baseline impedance compared to the neck or arms due to thicker epidermal, adipose (fat), and fascial layers. Low-power TENS units fail to push the electrical vector deep enough to reach the spinal nerves. This hardware dynamically steps up the internal voltage rail to maintain a true 100mA continuous output across a 500-Ohm biological load. This forces the current vertically through the resistive fat layer and directly into the paraspinal nerve roots without signal degradation.

•  

  H3: Dual-Channel Cross-Vectoring 

  Lumbar pain is rarely localized to a single point; it radiates across broad dermatomes. The PCBA integrates dual-isolated magnetic transformers, allowing clinicians to deploy four electrodes in a "crisscross" or interferential-like pattern across the L4-L5 vertebrae. The hardware-level magnetic isolation strictly prevents the two channels from short-circuiting across the torso, ensuring two independent, highly stable current loops intersect precisely over the pain epicenter.

• Mechanical Strain-Relief Leads

  Patients frequently wear back-pain TENS units while sitting in office chairs, driving, or lying in bed. This traps the lead wires under body weight, subjecting the pin junctions to severe 90-degree bending and kinetic shear. The output jacks on the PCBA are structurally reinforced against the ABS housing. Furthermore, the supplied OEM lead wires utilize Kevlar-core tension threads covered by extended TPU strain-relief boots, physically preventing the internal copper strands from fracturing under repeated mechanical compression.

• Firmware Kinesiology Locking : We can rewrite the MCU parameters to hard-code specific frequencies (e.g., 80-120Hz for acute pain, 2-10Hz for endorphin release). This locks the hardware limits to match a physical therapy clinic's proprietary lower-back treatment protocol, preventing patient tampering.

• Logistics Routing : SMT PCBA assembly and ABS injection molding execute in our China facilities. Final unit calibration, battery insertion, and retail kitting are routed through our Vietnam hub to secure supply chain resilience and optimize global medical electronics import tariffs.

• Regulatory Support : Complete hardware schematics and electrical testing logs support B2B client submissions for FDA 510(k) Class II (OTC or Prescription) and CE (MDR) market clearances. 

• Systems : PCB component soldering, final assembly, and QA oscilloscope testing operate entirely under audited ISO 13485:2016 quality frameworks.

B2B physical therapy networks and orthopedic brands can request dual-channel PCBA prototypes and load-testing reports. 

👉 [Request Lumbar TENS Prototypes]

Hot Tags: tens unit for back pain, China tens unit for back pain manufacturers, suppliers, factory, TENs for Neuropathic Pain, TENS for period pain, best TENS machine for arthritis, TENS Machine Physiotherapy, best TENS unit for back pain, Electric Muscle Stimulator TENS