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Bare Alloy Resistor Also Known As Bare Pure Alloy Current-Sensing

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Bare Alloy Resistor Also Known As Bare Pure Alloy Current-Sensing

Name: Bare Alloy Resistor Also Known As Bare Pure Alloy CurrentSensing
Brand: UCHI
Price: 1 USD

Quality Bare Alloy Resistor Also Known As Bare Pure Alloy Current-Sensing for sale

Brand Name : UCHI

Model Number : UL.VDE,SGS,REACH,CQC,CSA.ISO.ROHS,CUL

Certification : 471KD10

Place of Origin : Dongguan，Guangdong,China

MOQ : 5000PCS

Price : Negotiable

Payment Terms : T/T,Paypal,Western Union,Money gram

Supply Ability : 5000,000,000PCS Per Month

Delivery Time : 5-7 days

Packaging Details : Bulk/Ammo/Reel

Voltagerating : Varies (e.g., 10V to 1000V)

Peak Energy : 380J

Rotational Speed : 4500min

Lifespan : Typically 10 years or more under normal conditions

Max Power : 0.4W

Color : White

Temperature Coefficient : MLV

Allowable Deviation : ±10%

Oem Service : Yes

Dimension : 34mm

Power Consumption : 0.25（W)

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Bare Alloy Resistor

Bare alloy resistor (also known as bare pure alloy current-sensing/shunt resistor) is a high-power milliohm-level resistor without resin/plastic encapsulation coating, with its alloy resistive element directly exposed. It is specially designed for high-current precision current sensing.

Core Structure & Materials

Resistive element: Manganin, Constantan, Nichrome, Karma alloy.

Electrodes are mostly high-conductivity pure copper, connected by electron beam welding / laser welding.

Common packages: 3920, 5930, 2725, available in flat sheet and zig‑zag structures.
Resistance range: Typically 0.1 mΩ – 5 mΩ;

Tolerance up to ±0.01%;

TCR as low as ±10–25 ppm/℃;

Parasitic inductance < 3 nH, non‑inductive design.
Power rating: Starts from 5 W, some models 10–15 W;

Operating temperature: -55℃ to 170℃, compliant with AEC‑Q200.

Key Advantages & Precautions

Excellent heat dissipation: Large exposed surface area enables fast heat release and higher power density.
Ultra‑stable resistance: Low temperature coefficient, low thermal EMF, high surge current capability; suitable for harsh working conditions.
Soldering restrictions: Generally only compatible with reflow soldering; avoid high-temperature damage from wave soldering. Anti‑oxidation and mechanical protection required. Not suitable for unprotected dusty or humid environments.

Typical Applications

Current sensing and shunting in new energy vehicle BMS, industrial power supplies, frequency converters, servo drives, photovoltaic inverters, and charging piles.

Selection & Purchasing Tips

Select package and power rating based on maximum current, power dissipation, and PCB space. Prioritize low TCR, low inductance, and Kelvin 4‑terminal design.
Soldering process must match reflow soldering. Apply coating or housing for protection if necessary.

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