New CotoMos® Short Form Catalog

Posted on Friday, June 9th, 2017


Please download the newest version of the CotoMOS® Shortform Catalog.  The products are now grouped by application or featured characteristic - so it's EASIER than ever to choose and/or recommend CotoMOS® MOSFET relays.

12 Product groupings include: Automotive, Fast Switching, Form B, Form C, High Current, High Temperature, High Voltage, Low Leakage Current, Telecom, Low Capacitance and General Purpose.

Click here to download your copy.

For All CotoMOS
® part numbers.

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Therm-O-Disc’s G4 257C Microtemp® Thermal Fuse - Highest Open & Hold on the Market

Posted on Monday, June 5th, 2017

Hold Temperature (Th) of the industry leading MICROTEMP G4 257C has been increased to 220ºC to ensure applications with higher normal ambient temperature requirements will have added assurance of maintained operation for a minimum period of 168 hours without opening, as tested per IEC 60691. 

Features Include:

  • Holding Temperature - 220C - Industry Leading
  • Agency Approval - UL, VDE, CSA, CCC
  • Evaluated in laboratory conditions to maintain continuity for 1,000 hours at continuous thermal fuse body temperature of 220C.


See all Therm-O-Disc Products

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Using the RedRock™ TMR Magnetic Sensors RR120/130 for Speed & Direction Estimation in Rotating Systems

Posted on Friday, June 2nd, 2017

This application note discusses the use of TMR magnetic sensors in rotating systems where speed and direction of rotation are the bases for measurement. Such applications would include utility metering, motor position and other indexing applications, where the turn of a shaft is directly related to a quantity to be measured.  

See the RR110 specification

Please see the complete Application Note

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Interfacing the Coto Technology RedRock RR110

Posted on Thursday, May 4th, 2017

Interfacing the Coto Technology RR110 to an ADC using a low power analog interface circuit.

Background Portable medical devices, such as personal insulin pumps, have gotten smaller with time, allowing them to be conveniently carried by the user. This convenience has been made possible by intelligently and accurately dispensing product when active, and ensuring very low quiescent current when not active. Sensing technologies used to monitor the position of the plunger, therefore, need to be accurate in order to ensure the correct dosage, while being extremely frugal on power demand in order to fit within the operation profile of the device with the chosen battery. The RR110 analog sensor – from Coto Technology’s RedRock Series sensor product line – has high sensitivity and operates with ultra-low current, making it ideally suited for these applications. The RR110 is a two-terminal, passive analog magnetic sensor based on the Tunneling Magnetoresistance (TMR) principle. Resistance of the Magnetic Tunneling Junction (MTJ) changes from approximately 65kΩ with zero magnetic field, to approximately 40kΩ in the presence of ~10mT magnetic field and can be used reliably with a current as little as 1mA to measure the resistance change as a change in voltage. 

See the RR110 specification

Please see the complete Application Note

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Braking Resistors from Isotek are High Powered

Posted on Friday, April 14th, 2017

Isotek Metal Clad Braking Resistors - High Power 

Braking Resistors from Isotek are High Powered

Braking resistors from Isotek are offered in a wide range of HIGH POWER / Dynamic Braking Metal Clad Configurations. These resistors come in aluminum Extruded Aluminum Housings and available with standard and Non-Inductive windings. The ULH and ULV series are UL and TUV recognized.

With resistance ranging from 0.1 Ohms to 2 Mega Ohms, Isotek's braking resistors are designed for applications with 25 W to 1200 W power requirements. Most applications in which these resistors are used require high wattages where space is at a premium. As a result, they are compact in nature and their enclosure chassis are encased in good quality heat sinks. These braking resistors are great in applications such as material handling and fabrication, elevators, hoists, cranes, escalators and mass transit.

With a tubular Aluminum Housing, standard and non-inductive windings, the FRH, and RH series offer resistance ranging 0.1Ohms to 2.2 mOhms. If you are looking for Flat Stamped Housing resistors, Isotek offers IRS, IRN, and IRF series offering resistance range 1 to 5.78 KOhms.

Dynamic Braking 400 W to 3000 W

The IRP series of resistor assemblies are designed to handle power of up to 3,000 watts in free air. These packages are comprised of multiple resistors assembled into a rugged protective case. The base is made using zinc plated steel. The ventilated cover is made with powder-coated steel and is baked for durability.

Dynamic Braking 80 W to 400 W

The RA series of resistor assemblies are designed for use in power inverters and motor drives. These assemblies are based on our standard metal clad resistor technology. The resistors are enclosed in a powder coated steel case, which conforms to international safety specifications.

Dynamic Braking 60 W to 500 W (UL® Recognized)

The ULV (V=vertical) & ULH (H=horizontal) models are UL® recognized metal-clad, high power resistors designed for industrial drives and other applications. The rugged extruded aluminum housing provides electrical isolation and simple two-screw mounting. These models are available with flying leads or tab terminals and can be ordered with inductive or non-inductive windings. Packages 200W and larger are also available with internally mounted, UL listed, thermal protection circuits.

Dynamic Braking 50 W to 500 W (UL® Recognized)

The ULN and ULF models are wire-wound, high-power, metal-clad low inductance resistors designed for industrial and other applications where space is at a premium and performance is a must. The extruded aluminum housing provides rugged and strong protection while the flat design allows for excellent heat dissipation. These models are supplied with flying leads. The most common applications for these models are motor drives, dynamic braking, snubber circuits and power sources for industrial equipment. Both models are recognized UL508 components.

Since 1989, Isotek has been building a solid reputation for quality resistors. Backed by more than 25 years of sales experience and an expanded line, Isotek is now able to offer a wider range of solutions with cost-effective precision products. 

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