The hnstshop.com/search/PMSH.html" target="_blank">PMSH1206-Series is a high-performance Metal Strip Current Sensing Resistor designed with a compact structure and reliable performance. It features short electrodes, two terminals, and is made of pure metal, with a standard size of 0.12×0.06 inches. This series is engineered to meet the precise current sensing needs of various electronic devices, offering excellent electrical characteristics and strong environmental adaptability. Whether in industrial control systems, automotive electronics, or consumer electronic products, the PMSH1206-Series delivers stable and accurate current measurement support.
Key Specifications
Dimensions
The PMSH1206-Series adheres to strict dimensional standards to ensure compatibility with mounting requirements. The length (L) is 3.20±0.20mm, width (W) is 1.60±0.20mm, electrode length (E) is 0.50±0.20mm, and height (H) is 0.70±0.15mm. These compact dimensions allow for easy integration into dense circuit layouts without occupying excessive space.
Material & Electrical Characteristics
The series offers two high-quality alloy material options. The KarMa material variant covers a resistance range of 150-200mΩ, while the MnCu composite alloy (MnCu, Cu) variant is available for resistance values from 101-140mΩ. For resistance values of 2-100mΩ, the 1.0Watt rating with MnCu material ensures stable performance. Additionally, the 1.0Watt rating is also offered for 1mΩ and 1.5mΩ resistors with a TCR of ±380ppm/℃.
All variants operate within a wide temperature range of -55℃ to +170℃, with power ratings of 0.5Watt and 1.0Watt to accommodate different power requirements. The temperature coefficient (TCR) is ±50ppm/℃ for most variants, ensuring minimal resistance drift under temperature fluctuations. Resistance tolerance options include ±0.5%(D), ±1%(F), ±2%(G), and ±5%(J), providing flexibility to meet diverse precision needs. Custom resistance values beyond the standard range are available upon customer request.
Structural Design
The PMSH1206-Series boasts a sophisticated multi-layer structure. The core component is the resistive body made of high-purity alloy, which is protected by a protective coating to enhance durability. The structure also includes a copper plating layer, nickel plating layer, and tin plating layer, ensuring excellent solderability and corrosion resistance. Clear marking is applied to facilitate product identification and traceability.
Reliability & Environmental Performance
Reliability Tests
The PMSH1206-Series undergoes rigorous reliability tests to guarantee long-term stable operation. Key tests include:
- Short Time Overload: Withstands 5 times the rated power, ensuring resistance change (ΔR) ≤ ±0.5%.
- Biased Humidity Test: Operates at 10% rated power, 85±5% relative humidity, and 85±5℃ for 1000 hours (90min ON/30min OFF cycle) with ΔR ≤ ±0.5%.
- Temperature Cycling: Endures 1000 cycles of -55℃ to +125℃, followed by a 24±4 hour standing period, with ΔR ≤ ±0.5%.
- Operational Life: Maintains stable performance at 125±3℃ with rated current applied for 1000 hours, resulting in ΔR ≤ ±0.5%.
- Other tests such as low/high temperature storage, resistance to solder heat, solderability, and solder joint strength all meet relevant industry standards (JIS C 5201, MIL-STD-202, JESD22), ensuring the product's robustness in various application scenarios.
Environmental Adaptability
The series excels in environmental adaptability. The operating temperature range of -55℃ to +170℃ allows it to work reliably in extreme temperature conditions. For ambient temperatures exceeding 70℃, the power derating curve provides clear guidance for safe operation. When stored in airtight conditions with a temperature of +5℃ to +35℃ and relative humidity of 40-75%, the product has a shelf life of 2 years.
Soldering & Packaging
Soldering Requirements
Recommended solder pad dimensions are a=1.8±0.1mm, b=1.7±0.1mm, and L=1.6±0.1mm. For reflow soldering, the temperature profile includes a preheating zone, soaking zone, reflow zone (maximum 250℃), and cooling zone, with specific time parameters to ensure proper soldering. Wave soldering allows a maximum temperature of 260℃, with appropriate heating rates and dwell times. Acceptable heating methods include infrared, vapor phase, and hot air, but exceeding the recommended temperature profile may damage the product.
Packaging Specifications
The PMSH1206-Series is packaged in reels, with 5000 pieces per reel. The reel specifications meet industry standards, with dimensions including B=2.00±0.5mm, C=13.50±0.5mm, D=21.00±0.5mm, M=60.00±1.0mm, W=178.0±2.0mm, and another width parameter of 9.00±0.5mm. The carrier tape specifications ensure secure storage and transportation, with key dimensions such as W=8.00±0.20mm, P0=4.00±0.10mm, P1=4.00±0.10mm, P2=2.00±0.10mm, A0=2.00±0.20mm, B0=3.60±0.20mm, D0=1.50+0.50mm, F=3.50±0.05mm, E=1.75±0.10mm, and T=0.81±0.15mm. The seal tape has a peeling strength of 0.1-0.7N (10-70gf) at 165-170°, ensuring easy unpacking without damaging the product.
Conclusion
The PMSH1206-Series Metal Strip Current Sensing Resistor combines compact size, high precision, and reliable performance, making it an ideal choice for current sensing applications across various industries. Its strict adherence to dimensional standards, diverse material and resistance options, excellent environmental adaptability, and rigorous reliability testing ensure consistent performance even in harsh conditions. With optimized soldering and packaging designs, the series offers convenient integration and secure transportation. Whether for standard requirements or custom resistance needs, the PMSH1206-Series delivers exceptional value and reliability, supporting the stable operation of electronic systems and contributing to the advancement of electronic technology.
