Description
The Precision Open-Air Low Ohmic Resistor offers reliable and accurate current sensing with resistance values ranging from 0.5mΩ to 100mΩ. Built for open-frame designs, it ensures excellent thermal management and high surge capability. This resistor is perfect for applications such as electric vehicle BMS, inverters, motor control, industrial automation, and HVAC systems. Available in a variety of power ratings and resistance tolerances, our open-air resistors can also be customized to meet your exact specifications.
The bare metal element design allows for maximum cooling via airflow, forcing less heat into the PCB. The flameproof construction offers values down to 2mΩ with low inductance. Customer can specify resistance range designed to satisfy challenging and specific technical requirements.
Key Features:
Resistance range: 0.5mΩ – 100mΩ
Power rating: Up to 20W
Tolerance: ±1%, ±5%
High thermal dissipation open-frame structure
RoHS & REACH compliant
Customization available
Dimension
| Supplier | Material | Wire | Pin Pitch | Resistance | Shape |
|---|---|---|---|---|---|
| Yuansheng | K : Constantan M : Manganese Copper DX : Tinned Copper NT : Copper Nickel NG : Nickel-Chromium MN : 6J16 Alloy MM : 6J06 Alloy | 10 : 1.0mm | 10 : 10mm | 20 : 20mR | U : U Type M : M type M2 : M2 type LX : Type UZ : Type HX : HX |
| Orders are available: 1: Wire diameter of “A”  2: Rated current3: Span of “W”4: Resistance5: Other requirements (board height, foot length, etc.) | |||||
| Dimensions Reference: A : Wire H : Height H1 : Length E : Pin F : Outer Size W : Pin Pitch | |||||
Why Choose Our Open Air Low Ohmic Resistors?
Non-inductive design for high-frequency performance
Wide operating temperature range for harsh environments
Press-fit pins for secure PCB mounting and easy soldering
Compliance with ROHS and REACH
Our resistors combine durability, low resistance, and superior accuracy—making them a trusted solution for engineers worldwide.
Applications of Open Air Low Ohmic Resistor
Open Air Low Ohmic Resistors are used in:
Power electronics – current sensing in converters, inverters, BMS
Motor drives & VFDs – for real-time current feedback
Automotive – battery sensing, regenerative braking, ECU systems
Industrial automation – servo drives, PLCs, robots
Power supplies – overcurrent protection in SMPS and UPS
Renewable energy – solar inverters and energy storage systems
They offer low inductance, high accuracy, and excellent thermal performance, ideal for high-current applications.
All products comply with REACH standards and ROHS requirements.
