The document compares different metal strip current sensing resistor models from various companies. It covers specifications, manufacturing processes, and test results. Key points include: Vishay's WSL series uses a metal foil and copper electrode welding construction. GTC's LR series forms resistance through molding and combines copper electrodes. Testing shows the Wellcomp WMCS series has the lowest resistance variation under short time overloads and a TCR between -10 and 20 ppm/C. The summary notes advantages of each product including chip size, cost, and thermal stability.
ALD ATO nanolaminates with adjustable electrical properties, poster published...Riikka Puurunen
R. L. Puurunen, H. Kattelus, ALD ATO nanolaminates with adjustable electrical properties, 9th International Conference on Atomic Layer Deposition “ALD 2009”, Monterey, California, July 19-22, 2009. Poster presentation.
Acknowledgement (from the Abstract):
Acknowledgements: The authors are grateful to Ari Häärä for making the electrical measurements and to Sari Sirviö for supervising part of the sample fabrication and for initial interpretations of the results of the electrical measurements. This work was performed within the “ALDKOMP” project funded by Tekes (Finnish Funding Agency for Technology and Innovation).
High Voltage Insulating mats are thin mats compared to traditional Rubber Matting but are highly dielectric in nature.
[ http://insulationmat.in/electrical-insulating-mats/ ]
ALD ATO nanolaminates with adjustable electrical properties, poster published...Riikka Puurunen
R. L. Puurunen, H. Kattelus, ALD ATO nanolaminates with adjustable electrical properties, 9th International Conference on Atomic Layer Deposition “ALD 2009”, Monterey, California, July 19-22, 2009. Poster presentation.
Acknowledgement (from the Abstract):
Acknowledgements: The authors are grateful to Ari Häärä for making the electrical measurements and to Sari Sirviö for supervising part of the sample fabrication and for initial interpretations of the results of the electrical measurements. This work was performed within the “ALDKOMP” project funded by Tekes (Finnish Funding Agency for Technology and Innovation).
High Voltage Insulating mats are thin mats compared to traditional Rubber Matting but are highly dielectric in nature.
[ http://insulationmat.in/electrical-insulating-mats/ ]
Military Grade: MIL DTL 23053/1
Heat Shrink Tubings - Insulate, Protect & Identify
SE heat shrink is ideal for providing mechanical protection with solvent resistance to gasoline, hydraulic fluid and lubricating oils.
Approved to military grade MIL-DTL 23053/1 the SE range of abrasion resistant elastomer heat shrink tubing has a shrink ratio of 2:1 and operating temperatures of -70 to 120 Degrees Celsius.
Thorne & Derrick are the largest UK distributor of heat shrink tubings and sleevings including 3M, Panduit, Hellermann Tyton, DSG Canusa, Shrinktek and Thomas & Betts.
Stock lines include thin, medium and thick wall adhesive lined heat shrink sleeves and moulded shapes (heat shrink cable caps, cable breakouts and cable boots) - insulate, seal, protect with heat shrinkable tubing.
CS Unitec offers a complete line of High-Quality Non-Sparking, Non-Magnetic and Corrosion-Resistant Safety Tools. CS Unitec is a leader in special Copper Alloy Safety Hand Tools manufactured for use in high-risk areas where a spark can create a disaster.
Solving Problems with Reliability in the Lead-Free EraCheryl Tulkoff
This presentation provides a focused but comprehensive discussion on potential reliability issues that can arise within Pb-free processes. Areas of potential high risk are examined. For each reliability concern, a brief description is provided, followed by the current state of industry knowledge and an opportunity for risk mitigation based upon the product design, materials, complexity, volumes, and customer expectations of reliability. A final summary provides the attendees a roadmap for ensuring the reliability of Pb-free product.
Military Grade: MIL DTL 23053/1
Heat Shrink Tubings - Insulate, Protect & Identify
SE heat shrink is ideal for providing mechanical protection with solvent resistance to gasoline, hydraulic fluid and lubricating oils.
Approved to military grade MIL-DTL 23053/1 the SE range of abrasion resistant elastomer heat shrink tubing has a shrink ratio of 2:1 and operating temperatures of -70 to 120 Degrees Celsius.
Thorne & Derrick are the largest UK distributor of heat shrink tubings and sleevings including 3M, Panduit, Hellermann Tyton, DSG Canusa, Shrinktek and Thomas & Betts.
Stock lines include thin, medium and thick wall adhesive lined heat shrink sleeves and moulded shapes (heat shrink cable caps, cable breakouts and cable boots) - insulate, seal, protect with heat shrinkable tubing.
CS Unitec offers a complete line of High-Quality Non-Sparking, Non-Magnetic and Corrosion-Resistant Safety Tools. CS Unitec is a leader in special Copper Alloy Safety Hand Tools manufactured for use in high-risk areas where a spark can create a disaster.
Solving Problems with Reliability in the Lead-Free EraCheryl Tulkoff
This presentation provides a focused but comprehensive discussion on potential reliability issues that can arise within Pb-free processes. Areas of potential high risk are examined. For each reliability concern, a brief description is provided, followed by the current state of industry knowledge and an opportunity for risk mitigation based upon the product design, materials, complexity, volumes, and customer expectations of reliability. A final summary provides the attendees a roadmap for ensuring the reliability of Pb-free product.
This product is a type of Ceramic Encased Resistor, which is a type of Wire Wound Resistors. Features of this product are: Flat vertical mounting type, Ceramic and fibre glass core available, Ceramic legs for greater stability also act as heat sink, Impulsive types available, Non inductive types available, PCB space saving resistor. This products is consumable for Industrial and Consumer Electronics.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/hmv/
HTR India - Products - Current Sense Resistors - Ceramic Encased Resistor - H...Creativity Please
This product is a type of Ceramic Encased Resistor, which is a type of Current Sense Resistors. Features of this product are: Alloy ribbon element in square profile ceramic tube, Ceramic encased for greater heat dissipation and thermal stability, Low TCR, Negligible inductance. This product is consumable for Current Sensing for Industrial and Power Conditioning Applications.
For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/heal/
Benchmark of metal strip current sensing resistors 20101203
1. Benchmark of Metal Strip
Current Sensing Resistors
I. Specification Comparison
II. Appearance Observations
III. Manufacturing Processes
IV. Characteristic Analysis
V. Summary
2. I. Specification Comparison
Company
Model WMCS series WSL series LR series RL series RLM series
Power 2W (1mW≦R≦100mW) 2W (R≦10mΩ) 2W (0.5mΩ≦R≦75mΩ) 2W (R≦2mΩ) 2W (R≦10mW)
Rating 1W (1mW≦R≦200mW) 1W (R>10mΩ) 1W (0.5mΩ≦R≦100mΩ) 1W (R>2mΩ) 1W (R>10mW)
275ppm/°C 50ppm/°C 200ppm/°C 275ppm/°C
(R≦2.9mΩ) (0.5mΩ≦R≦3mΩ) (R≦2.9mΩ) (R≦2mΩ)
150ppm/°C -25ppm/°C 100ppm/°C 100ppm/°C
±50ppm/°C (2.9mΩ<R≦4.9mΩ) (3.1mΩ<R≦6.9mΩ) (3mΩ<R≦10mΩ) (2mΩ<R≦10mΩ)
TCR (1mW≦R≦200mΩ) 110ppm/°C -15ppm/°C 50ppm/°C 75ppm/°C
(4.9mΩ<R≦6.9mΩ) (7mΩ≦R>10mΩ) (R>10mΩ) (R>10mΩ)
75ppm/°C
(R>6.9mΩ)
Resistance
1mΩ~200mΩ 1mΩ~500mΩ 0.5mΩ~100mΩ 1mΩ~50mΩ 1mΩ~100mΩ
Range
Operating
-55°C~+170°C -65°C~+170°C -65°C~+275°C -55°C~+170°C -55°C~+170°C
Temp. Range
4. III. Manufacturing Processes
Wellcomp WMCS series
Metal foil/substrate Cu electrode Resistance
lamination formation trimming
Over-coating Marking Cu/Ni/Sn Plating
5. III. Manufacturing Processes
Vishay WSL series
NiCr foil Cu electrode welding Trimming Over-coating
Marking Terminal plating
6. III. Manufacturing Processes
GTC LR series
010
Resistance
Molding Marking
formation
010 010
Cu electrode
Terminal Plating
combination
7. III. Manufacturing Processes
Cyntec RL series
Substrate Metal foil/substrate Trimming
lamination
Over-coating Marking Terminal plating
8. III. Manufacturing Processes
TA-I RLM series
Resistance
Molding Marking Cu plating
formation
Cutting and Sn
Sorting
plating
9. IV. Characteristic Analysis
TCR (Temperature Coefficient of Resistance)
Company
WMCS2512 WSL2512 LR2512 RL3264 RLM2512
Item R010 R010 R010 R010 R010
R1 at 25°C (mW) 9.98 9.96 9.97 10.02 10.02
R2 at 125°C (mW) 9.97 9.98 9.96 10.03 9.99
TCR (ppm/°C) -10.02 20.08 -10.03 9.98 -29.94
10. IV. Characteristic Analysis
STOL (short time over load) test
Test condition：
Power：5W Current：22.4A Loading Time：5 seconds
Power 5W
Company
MAX 0.02% 0.04% 0.03% 0.08% 0.03%
Resistance
Variation
MIN 0.01% 0.01% 0.01% 0.02% 0.01%
AVG 0.011% 0.023% 0.02% 0.05% 0.013%
11. IV. Characteristic Analysis
STOL (short time over load) test
Test condition：
Power：10W Current：31.6A Loading Time：5 seconds
Power 10W
Company
MAX 0.06% 0.32% 0.28% 0.26% 0.15%
Resistance
Variation
MIN 0.01% 0.11% 0.13% 0.02% 0.02%
AVG 0.038% 0.243% 0.178% 0.133% 0.092%
12. IV. Characteristic Analysis
Device Surface Temperature
Test Condition： Current:10A Loading Time:10min
Wellcomp Vishay GTC
TA-I Cyntec
13. V. Summary
Company Wellcomp Vishay GTC Cyntec TA-I
WMCS
Model WSL series LR Seroes RL series RLM Series
series
Combination of the Combination of the Metal foil body with
Metal foil on ceramic Metal foil on
metal foil and the metal foil and the copper plating
substrate ceramic substrate
Construction electrode material electrode material electrodes
1.High chip size 1. Lower terminal 1. Lead-free 1. Low device 1. Well mass
ability resistance product working production ability
(From 0805~2512) 2. Lead-free 2. Lower terminal temperature 2. Lead-free product
2. Low device product resistance 2. Lead-free product
Advantage working temperature 3. High device
3. Lead-free product thermal stability
4. High thermal
stability
1. Not well known 1. High material 1. High material 1. High process 1. High device
yet cost cost control cost working temperature
2. High human 2. High human 2. Longer lead time 2. Poor soldering
source request source request especially at small
Disadvantage
for the assembling for the assembling size device.
3. Weak overcoating
