UM-0018-H Ultra Miniature Reed Switch
These highly sensitive, Ultra Miniature Form A reed switches are designed for low power, high speed switching applications and have an Operate Time of less than 0.3 milliseconds. The 7.0 mm glass version is built for lower Contact Resistance and can switch higher loads of 10W at 100V. The flattened leads are useful for orienting all reed switches in a batch, in one way, while soldering, welding etc., for maximum in-group sensitivity. The cropped version of this UM-0018-H reed switch is suitable for smaller plastic housings and can be soldered to cables, the SMD version is suitable for reflow on PCBs, and the vertical and horizontal mount versions are suitable for mounting on through hole PCBs.
Features
7.0 mm Glass length. Ruthenium contact. Normally Open. Inert gas filled. 4 types of Lead Formations.
Benefits
Omni-polar. Does not require power for operation. Sputtered Contact. RoHS Compliant. Not ESD Sensitive.
Cylindrical and Rectangular Magnets
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Drawing of Cylindrical MagnetsDrawing of Rectangular Bar Magnets starFeaturesNdFeB High Energy. Nickel coated. Energized
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Nov 18, 2020 |
Actuation Distances for UM-0018-H Reed Switches
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For easy selection of AT band and Magnet for an application, we offer Actuation distances for the UM-0018-H Reed Switch in cropped, SMD
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Nov 25, 2020 |
Electrical
| Contact Form | A | |
| Contact Rating (max) | W/VA | 10.0 |
| Switching Current (max) | A | 0.5 |
| Carry Current (max) | A | 0.5 |
| DC Switching Voltage (max) | VDC | 100 |
| AC Switching Voltage (max) | VAC | 70 |
| Breakdown Voltage (min) | VDC | 150 |
| Contact Resistance (max) | mΩ | 200 |
| Insulation Resistance (min) | Ω | 109 |
| Capacitance (typ) | pF | 0.2 |
Miscellaneous
| Operate Time (max) | ms | 0.35 |
| Bounce Time (max) | ms | 0.3 |
| Release Time (max) | ms | 0.1 |
| Resonance Frequency (typ) | Hz | <2000 |
| Operating Frequency (max) | Hz | 500 |
| Operating Temperature | °C | -40 to +120 |
| Shock Resistance (½Sin wave for 11ms) | G | 30 |
| Vibration Resistance (10-2000Hz) | G | 20 |
| Test Coil Number | 717 102 003 |
Ordering Code
UM-0018-H-(Operate Band)-(Formation Code)
| Operate Band | AT | 7-20 |
| Corresponding Release Band | AT | 3-18 |
| Formation Code | Lead Type |
| Full Length Leads | |
| C | Cropped |
| S | SMD |
| H | Horizontal Mount |
| V | Vertical Mount |
Examples: UM-0018-H-7-12 denotes 7-12 Operate Band (AT) with Full Length leads. UM-0018-H-15-18-H denotes 15-18 Operate Band (AT) with Goal-post SMD formed leads for horizontal mounting.
Other Special Configurations: Lower Static Contact Resistance, Dynamic Contact Resistance Limit, Higher Insulation Resistance, Special Release Limits, Gold plated leads.
Usage Notes
Here are some of the recommended usage notes to ensure maximum durability of this reed switch. The complete usage notes are available here.
Ampere Turn Selection
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For any application, it is important to select the correct Ampere Turn (AT) or magnetic sensitivity of a Reed Switch, Reed Sensor or
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Aug 27, 2020 |
Product Handling
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Reed Switch Handling Reed Switches, Reed Sensor and Magnet Sensors are sensitive devices that easily develop micro cracks in the glass
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Aug 31, 2020 |
Manual Soldering
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Soldering of Reed Switches and Reed Sensors requires some care to ensure that these delicate devices are not inadvertently damaged. Damage
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Nov 10, 2020 |
Ferro-magnetic parts
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Reed Switches use an alloy of Nickel and Iron with a few other elements that make the alloy Ferro-magnetic and having a low Remanence.
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Sep 4, 2019 |
Potting and Encapsulation
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Epoxy dispensing Nozzle When potting or encapsulating reed switch assemblies in custom housings, selection of materials are important.
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Sep 4, 2019 |
Reed Contact Protection Circuits
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It is assumed that the ideal reed switch load is a Resistive Load, but it is almost impossible to reduce any load to purely resistive.
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Aug 31, 2020 |
Applications
Although we can never restrict the use of a reed switch to a particular field, the following is a list of some of the applications that the UM-0018-H Miniature Reed Switch is known to perform well.
Reed sensors for detecting Ignition Key
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Automobile Key The Ignition key on an automobile comes in two types, a manual key or a start button as is the case in the newer
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Nov 7, 2020 |
Reed switches in Lightsabers
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Light Saber Light Sabers are weapons used by the Jedi and the Sith, in the fictional Star Wars Universe, set in a galaxy far, far,
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Nov 7, 2020 |
Magnet sensors in Musical Greeting Cards
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Greeting Card Even in the digital age of Smart phones, people do like to mail out or hand over greeting cards taped to gifts, to
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Nov 7, 2020 |
Reed sensors in Radio-controlled Gliders and model Airplanes
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Model Airplane Radio controlled aircrafts, gliders and helicopters come in various sizes from simple ones with few controls to more
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Nov 7, 2020 |
Reed sensors in Accurate level sensing of fluids
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Fuel Gauge In ships and yachts, it is not only necessary to monitor the exact volume of fuel, but also the volume of the sewage and the
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Nov 7, 2020 |
Reed switches in Washing machine vibration detection
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Washing Machine Reed Switches are used in bi-directional vibration sensors. These sensors are used in Washing machines to detect
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Nov 6, 2020 |
Reed sensors in Electric Toothbrushes
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Electric Toothbrush Electric toothbrushes are designed to make the brush head and bristles move in rapid motions, either in a
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Nov 6, 2020 |
Reed switches and Reed sensors in Spirometers
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Spirometer for Lung Function Testing A Lung function test or Pulmonary Function test, PFT for short, is a system to evaluate the
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Nov 6, 2020 |
Miniature Reed sensors in activating Dentist’s Drill
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Denstist's Drill A dental drill or hand-piece is a hand-held, mechanical instrument used to perform a variety of common dental
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Nov 6, 2020 |