Description
20mΩ Open Air Metal Alloy Resistor with Sleeve
The 20mΩ Open Air Metal Alloy Resistor with Sleeve is a high-precision resistor designed for accurate current measurement in high-current and industrial applications. Its open-air structure ensures excellent heat dissipation, while the protective sleeve offers mechanical safety and insulation. Ideal for energy meters, DC monitoring systems, and power supply testing.
Key Features of Metal Alloy Resistor
Radial leads for easy PCB mounting.
Low inductance design for stable high-frequency performance.
Precision alloy resistive element (Ni-Cu) with welded construction.
Pb-free and RoHS compliant.
Standard tolerances: ±3%, ±5%, ±10%.
Resistance range: 2mΩ ~ 50mΩ, customizable to meet specific technical requirements.
Open-air design for superior heat dissipation, reducing PCB thermal load
Technical parameters
| Parameter | Value |
|---|---|
| Resistance Range | 50μΩ – 1mΩ |
| Tolerance | ±1%, ±0.5% |
| Terminal | 2-terminal / 3-terminal (Kelvin) |
| Material | Manganin / Cu-Ni alloy |
| Current Rating | Up to 500A |
| Operating Temperature | -55°C to +170°C |
| Mounting | SMD / screw / PCB weldable |
Advantages of Metal Alloy Resistor
High accuracy and stability across temperature ranges
Flameproof construction for safety and reliability
Easy to install with standard stand-offs and spacings
Suitable for custom resistance ranges to meet demanding applications
Product Nominal
| Type | K | 10 | 10 | 20 | U |
|---|---|---|---|---|---|
| Material | Constantan | 1.0mm | 20mΩ | U type | |
Material &Shape
| Type | Material | Pin Pitch | Resistance | Shape |
|---|---|---|---|---|
| Current Shunt | K：Constantan (Copper-Nickel Alloy） M：Manganin (Copper-Manganese-Nickel Alloy） DX：Tin-Plated Copper NT：Copper-Nickel Alloy NG：Nickel-Chromium Alloy MN：6J16 Alloy（Manganin 6J16） MM：6J06 Alloy（Manganin 6J06） Nickel–chromium alloys are widely used in resistive components due to their thermal stability and oxidation resistance | 10: 1.0mm | 10: 10mm / 20: 20mΩ | U: U type |
| (Orders are available) 1：Wire diameter of”A” 2：Rated current 3：Pin pitch Span of“W” 4：Resistance 5:Other requirements( height,pin pitch length,etc. |  | A : wire data meter H : height H1: pin length E : Presser foot W : Pin pitch
|
Product Shapes
| Product Shapes | ||
|---|---|---|
| U Type
| UZ Type | HX Type |
| M Type
| M2 Type | LX Type |
Test Conditions
| Test Conditions | Max Resistance Change (ΔR%) |
|---|---|
| 1000 hours at 25°C (Loading Life) | ≤ 1% |
| 100 hours in Moisture | ≤ 1% |
| 1000 Thermal Cycles (-40°C to +150°C) | ≤ 1% |
Typical Applications
UPS systems and backup power units
Industrial power controllers and inverters
Smart circuit protection in automation systems
High-current sensing for battery-powered equipment
Data center and telecom power modules
- Inverter and Switching Power Supplies, Power Tool Motor controls.
- Current Detective, CPU Drive Control, Feedback System.
- Power Supply Shunt, Residual Battery Power Detection, Current Sensing.
This resistor is manufactured using Pb-free materials and complies with RoHS environmental requirements, supporting sustainable electronics design and meeting international compliance standards for industrial and power applications.
For more information on RoHS requirements, you may refer to the official EU RoHS directive documentation:
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