50PCS 2512 SMD Alloy Resistor Kit – 10 Values R001 to R100, Current Sense Sampling Resistors

This 2512 SMD alloy resistor assortment kit contains 50 pieces across 10 resistance values from 1mΩ to 100mΩ (R001–R100). Built with metal alloy elements for low TCR and high surge capability, these are current-sense and precision sampling resistors for PCB repair, prototyping, and BOM validation.

Packing List (50PCS Total)

Resistance	Value	Quantity	Typical Use
R001	1 mΩ ±1%	5 pcs	High-current sensing, busbar shunt
R002	2 mΩ ±1%	5 pcs	Motor phase current, battery monitoring
R005	5 mΩ ±1%	5 pcs	Power supply current feedback
R008	8 mΩ ±1%	5 pcs	Load current sensing
R010	10 mΩ ±1%	5 pcs	General current sense, amplifier shunt
R015	15 mΩ ±1%	5 pcs	Current limit, fuse alternative
R020	20 mΩ ±1%	5 pcs	Current feedback, gain setting
R025	25 mΩ ±1%	5 pcs	Current sense, current loop
R050	50 mΩ ±1%	5 pcs	Low-power current sensing
R100	100 mΩ ±1%	5 pcs	Precision shunt, amplifier input

Total: 10 values × 5 pcs = 50 pcs.

Key Features

• Package: 2512 (6332 metric) SMD — 6.3 × 3.2 mm footprint
• Technology: Metal alloy element (not thick film) — low TCR, high stability
• Resistance Range: 1 mΩ to 100 mΩ (0.001Ω–0.1Ω)
• Tolerance: ±1% (typical for alloy shunt resistors)
• Power Rating: 1W–2W (varies by value and pad design; verify for your layout)
• Temperature Coefficient: Low TCR alloy — typically ±50 to ±100 ppm/°C
• Termination: Solderable end caps, compatible with reflow and hand soldering
• RoHS Compliant

Why Alloy Resistors?

• Low TCR: Resistance stays stable across temperature swings — critical for current-sense accuracy.
• High Surge Capability: Alloy elements handle current spikes better than thick-film alternatives.
• Low Inductance: Suitable for switching-frequency current sensing.
• Long-Term Stability: Minimal drift under continuous load.

Typical Applications

Current Sensing

• Switching power supply current feedback loops
• Motor driver phase-current sensing
• Battery management system (BMS) current monitoring
• LED driver current regulation

Precision & Sampling

• Amplifier gain/feedback networks
• Current-to-voltage conversion (shunt + op-amp)
• Test equipment calibration references

PCB Repair & Prototyping

• Replacing blown SMD shunt resistors on motherboards, GPU cards, laptop boards
• Rapid BOM validation without ordering full reels
• Workshop bench stock for electronics technicians

Handling & Installation

• 2512 SMD — compatible with standard reflow profiles and hot-air rework.
• Hand soldering: use fine tip, avoid excessive dwell time to prevent pad lift.
• Observe power derating at elevated ambient temperature — check manufacturer curves.
• Low-ohm values (R001–R010): use 4-wire Kelvin measurement for accurate resistance verification.
• Store in anti-static packaging; avoid mechanical stress on terminations.

Why Buy This Kit?

• Covers the most common current-sense values in one package.
• Alloy construction outperforms standard thick-film at low resistance.
• 50 pcs total — enough for multiple repairs or prototype iterations.
• Cost-effective alternative to buying full reels of each value.
• Factory-tested, RoHS compliant.