Description
20mΩ Metal Alloy Shunt Resistor for Precise Current Sensing (Through Hole Type)
This metal alloy shunt resistor is a high-precision 20mΩ current sensing component designed for power electronics, battery systems, and industrial control applications. Its through hole structure ensures stable mechanical strength and excellent electrical performance under high current conditions.
Key Features of Metal Alloy Resistor
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Radial leads for easy PCB mounting.
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Low inductance design for stable high-frequency performance.
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Precision alloy resistive element (Ni-Cu) with welded construction.
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Pb-free and RoHS compliant.
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Standard tolerances: ±3%, ±5%, ±10%.
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Resistance range: 2mΩ ~ 50mΩ, customizable to meet specific technical requirements.
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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
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High accuracy and stability across temperature ranges
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Flameproof construction for safety and reliability
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Easy to install with standard stand-offs and spacings
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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% |
Common Problems in Current Sensing
- Inaccurate current measurement at high load
- Resistance drift under temperature variation
- Overheating in continuous operation
- Poor reliability in high-current pulse conditions
How This Metal Alloy Shunt Resistor Solves Them
- High-precision alloy material ensures stable resistance
- Low temperature coefficient improves accuracy
- Excellent overload and pulse current handling
- Through hole design improves mechanical and thermal stability
Typical Applications
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UPS systems and backup power units
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Industrial power controllers and inverters
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Smart circuit protection in automation systems
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High-current sensing for battery-powered equipment
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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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