The following is a detailed technical description of the SP2512FR082E3WPKH Xinwei alloy resistor, compiled based on its parameter characteristics, application scenarios, and manufacturer background information:
1、 Model analysis and basic parameters
Model identification
SP2512FR082E3WPKH：
`SP: Sunway alloy resistor series code.
`2512 ': Package size (6.4mm × 3.2mm).
`F `: Accuracy level (± 1%).
`R082 `: Resistance 0.082 Ω (82m Ω).
`E3W: Power of 3W
`PKH: Environmental and process code (compliant with RoHS standards).
Core parameters
Resistance and accuracy: 0.082 Ω± 1% (82m Ω), suitable for high-precision current sampling.
Rated power: 3W (high-power design in 2512 package).
Temperature coefficient (TCR): ± 50ppm/℃ (low-temperature drift characteristic, ensuring stability over a wide temperature range).
Material: Manganese copper or nickel copper alloy resistor body, providing low potential and anti pulse capability.
2、 Product Structure and Technical Features
Layered structure (typical alloy resistance design):
Resistive body: Alloy strip stamped and formed (such as manganese copper) to ensure low resistance and high stability.
Terminal electrode: multi-layer coating (copper substrate+nickel barrier layer+tin bonding layer), enhancing conductivity and corrosion resistance.
Protective layer: Black epoxy resin (UL94 V0 fire rating), high temperature resistant and insulated.
Substrate: Aluminum oxide ceramic (high thermal conductivity, supports power dissipation).
Technological advantages:
Non repair process: Through stamping and integrated molding, it avoids edge effects caused by traditional etching, improves accuracy and consistency.
High power density: 3W power concentrated in the 2512 package, suitable for high current scenarios with limited space (such as power modules).
3、 Electrical characteristics and performance parameters
|Characteristics | Parameters | Description|
|Resistance range | 0.082 Ω (82m Ω) | Typical low resistance sampling interval|
|Accuracy | ± 1% | Meets the requirements of precision current detection|
|Power Capacity | 3W (70 ℃ environment) | Attention should be paid to heat dissipation design to maintain power|
|TCR | ± 50ppm/℃ | Excellent stability in the full temperature range of 55 ℃~170 ℃|
|Pulse tolerance | High resistance to pulse current | Suitable for motor starting and transient scenarios of inverters|
Key design tip: In practical applications, PCB copper foil heat dissipation design (such as increasing copper surface area) is required to ensure that power does not decrease.
4、 Application Scenarios and Selection Guidelines
Typical applications:
Current sampling: high-precision current feedback in power management (such as DCDC converters) and battery management systems (BMS).
High power equipment: inverters, motor drivers, industrial servo control systems (3W power supporting 10A or above current).
Anti interference scenarios: LED driver power supply, frequency converter, relying on their low potential characteristics to reduce signal distortion.
Suggestions for selection comparison:
Same resistance substitute model:
Ellon: EMA25F3W0R082MDG (made of manganese copper material, ± 1%/± 50ppm).
Tian'er MR251220FR082MZ (compatible with 3W, TCR matching needs to be verified).
Selection considerations: Prioritize verifying TCR matching (such as ± 50ppm) and pulse tolerance curve to avoid sampling drift.
5、 Procurement Information and Manufacturer Overview
Supply and packaging:
Minimum order quantity (MOQ): 4000 pieces per tape (industry standard packaging).
Delivery time: Approximately 46 weeks (Xinwei standard production cycle) when there is a shortage of spot goods.
Manufacturer background:
Sunway: Acquired Juyongchang Electronics in 2021, integrated alloy resistor production line, passed IATF16949 automotive certification, and meets RoHS/halogen-free standards.
Technical advantage: Independently stamping, electroplating, and testing the entire production chain, ensuring high consistency and controllable delivery time.
6、 Summary
SP2512FR082E3WPKH, as a representative model of Xinwei 3W grade alloy resistors, has the core advantages of 82m Ω low resistance ± 1% accuracy and ± 50ppm low-temperature drift, and is suitable for high-precision current detection and industrial high-power scenarios. When selecting, it is necessary to combine the heat dissipation design with TCR requirements, and prioritize verifying the manufacturer's mass production consistency (such as Xinwei's automotive grade production line). When replacing with the same specifications, attention should be paid to the end electrode structure (such as the impact of long electrode design on welding heat dissipation).