Low-cost, Versatile SOT-23 Subminiature Surface Mount Package Ideal for Compact Designs with Tight Space Requirements

Honeywell is extending its Linear Hall-effect Sensor Integrated Circuits (IC) product line with the addition of the new SS39ET Series to its SS49E and SS59ET portfolio of low-cost Linear Hall-effect devices. With the launch of the SS39ET Series, Honeywell’s Linear Hall-effect product family now consists of three package styles with different lead configurations:

*  SS39ET: subminiature SOT-23 surface mount package (tape and reel format)
*  SS49E: leaded flat TO-92 package (bulk packaging, 1000 units per bag), SS49E-T2 (straight leads), and SS49E-T3 (formed leads) on tape in ammopack (fan-fold) format
*  SS59ET: miniature SOT-89B surface-mount package (tape and reel format)

“With the launch of the new SS39ET Series, customers can choose the package style and size to meet their application needs,” said Josh Edberg, senior global product marketing manager for Honeywell Sensing and Control. “Customers will appreciate the SS39ET Series’ SOT-23 subminiature footprint that takes up less space on the PC board, allowing more design flexibility and cost savings in their application.”

The SS39ET Series are designed to monitor magnetic fields from a permanent magnet or an electromagnet. All packages can be supplied on tape for automated, lower-cost assembly. These devices respond to both North and South poles, and can be powered with voltages as low as 2.7 V.

A wide temperature range of -40 °C to 100 °C [-40 °F to 212 °F] allows use in many environments, and the thermally balanced, integrated circuit provides stable operation over the full temperature range. Thin film resistors improve accuracy and provide a stable output. The energy-efficient, low current consumption of 6 mA at 5 Vdc and the 2.7 Vdc to 6.5 Vdc supply voltage range allow circuit design flexibility.

Potential industrial applications for the SS39ET Series include:
* Anti-tampering magnetic field sensing in smart remote utility meters
* Basic current sensing for motor load monitoring, detection
* Pump control in heavy-duty equipment and household appliances
* Simple linear or angular displacement sensing
* Handlebar/throttle position sensing in e-bikes and scooters
* Current sensing in appliances
* Speed adjustment trigger in tools and appliances
* Magnetic code reading in safes, security, and building access control systems.

Potential medical applications for the SS39ET Series include:
* Position sensing in infusion pumps

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Schurter is expanding its successful FMER series of high-current filters with a model for high power. The entire series is now available without grounding capacitors for safety-related applications.

Photovoltaic panels with increasing surface areas are being installed, and as a result ever more powerful inverters are required. To address this trend, SCHURTER is expanding the current ratings of its DC filters to 2300 A for higher power. For reasons of safety, filters are sometimes requested without grounding capacitors, which prevents any leakage current to ground. Thus, Sschurter is also offering this entire series without Y capacitors.

Modern solar inverters with MPP (maximum power point) trackers generate interference in both directions: on the AC grid side and the DC panel side. On the AC side, it is usual to insert an AC filter such as the SCHURTER FMAC or FMBC, but until now few provisions have been made for the DC side. EMC standards EN 61000-6-3 and EN 55014-1, however, also limit the level of interference on non grid-connected conductors such as those going to a solar panel. A remedy can be provided by DC filters installed on the DC side of the solar inverter.

Large solar inverters are generally housed in cabinets that must have active cooling. The Schurter FMER series features high temperature resistance, which reduces the necessary cooling energy and makes a significant contribution to higher energy efficiency for the entire system.

FMER family filters have UL approvals for ambient temperatures of +55°C and +75°C as well as for rated voltages of 600 VDC and 1000 VDC. They are exceptionally well suited for rated currents from 25 A to 2300 A at an ambient of 55°C and for voltages up to 1200 VDC.

FMER SOL DC filters come standard with screw terminals up to 150 A, and with copper bars starting at 250 A. Other connection types (stranded wire or copper bar for current levels less than 250 A or bus bar terminals) are available on request.  In addition, small modifications to the switching or the housing are also possible on request.

For optimal matching to the inverter, Schurter offers its own EMC measurement service that makes it possible to find the most cost-effective filter solution.

Technical features:
– Rated voltage 1200 VDC
– Rated current 25 A to 2300 A
– Connections: screw terminals 25 - 150 A; copper bars 250 - 2300 A
– cURus approval: 600 VDC 25 - 150 A, 1000 VDC 250 - 2300 A

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There are a few inventions that we often take for granted.  The indicator light is a perfect example of an unsung hero in the engineering world.  Though it’s a simple little component it performs a role we simply couldn’t do without and is used in countless applications.  The indicator light is our gateway to understanding the state of the machinery we interact with day in day out; it’s essential for condition monitoring and health and safety, and for that reason it seems it’s about time it got a bit of recognition for the essential work it does!

LED Indicator Lights
The most common form of indicator light these days is the LED indicator light, although more traditional incandescent light indicators are still used and available.  LEDs were first developed as replacement indicator lights for incandescent and neon indicator lamps.  LEDs were developed in 1962 by Nick Holonyak Jr who is widely considered to be the father of the LED.  Originally LEDs were expensive to manufacture, costing around $200 per unit so had very little application, but by 1968 the lights had been developed so that LEDS could start to be widely used.  They were installed in various pieces of equipment as indicator lights.

The technology which led to cheaper LED lights being developed has now advanced so that LED lights can be used for everyday lighting as well as in machinery.  LEDs are set to be the next big thing in public and domestic lighting in the next couple of decades.

Why We Couldn’t Live Without Indicator Lights
Indicator lights let us know what’s going on inside equipment and this equipment can be as trivial as a games console or as important as an aeroplane.  If the indicator lights fail on your favourite console nobody is going to die, but in a plane or car it could be different story.  We rely on these little lights to warn us if our brake fluid is low or to let our pilot know the plane has sufficient fuel.   In industry we use indicator lights to let us monitor the state of our machinery so we can decrease downtime and increase efficiency.  In the office an indicator light can monitor our energy use and help us become more eco-friendly.

Indeed, CMD offer a new ‘footprint system’ which helps offices monitor energy use and this relies heavily on the indicator light.  Indicator lights let us know when something is wrong and when everything’s going right and without them the world would be far less efficient place.

So next time your indicator light flashes up take a second to value its role in our work and daily lives, it really is something we couldn’t live without.

Written by Ed from CMD Ltd.  A leading supplier of power distribution units and power management systems online.

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This new model with a patented ceramic actuator face expands SCHURTER’s MSM family of metal pushbutton switches with rugged background illumination over the full actuator surface. The material is resistant against scratches, abrasion and impact as well as chemicals and makes the unit well suited for many applications in medical technology and industry. 

The new MSM CS metal pushbutton switch from SCHURTER is equipped with an actuator made of rugged ceramic. Ceramic is being employed for the first time in an operating switch and is patented by SCHURTER for this application. The material is resistant against scratches, abrasion and impact as well as chemicals; it can also be labeled and is translucent. Equipped with these versatile features, the MSM CS pushbutton switch opens up completely new possibilities in the construction of medical equipment and in industry.

If the switch is not illuminated, the actuator surface is white. Standard or customer-specific lettering is in black and embedded directly into the ceramic material.

In the illuminated versions of the switch, the actuator face fully illuminates across the entire surface, and lettering and symbols can also be applied. Positive lettering is done in black; for inverse lettering, the label text appears in the selected illumination color. Because of the way they are made, the labels are scratch-proof and stand up to common cleaning agents.

Thanks to a small, low-profile front mounting of 1.7 mm, the IP69K protection class and high level of impact resistance, the switch is extremely robust and protected against vandalism. The MSM CS is available for mounting diameters of 19 and 22 mm. Various contact types cover a range for allowable switching voltages from 30 VDC to 250 VAC; allowable switching currents range from 0.1 to 10 A. For fast wiring, the MSM CS provides blade terminals. Wires are connected to the microswitch element, which is subsequently snapped onto the previously screwed-in switch housing.

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