UM-0018-M Ultra Miniature Reed Switch
This highly sensitive, Form A type, UM-0018-M Ultra Miniature Reed Switches are designed for switching high speed signal loads with an Operate Time of less than 0.3 milliseconds. It can reliably switch loads of up to 5W at 100V. The Leads are flattened and are useful for orienting all reed switches in a batch, in one way if required, for maximum in-group sensitivity. Available with cropped leads for use in smaller plastic housings and can be soldered to cables or used on SMT PCB’s with slots. The SMD version is suitable for reflow soldering on SMT PCBs, and the vertical and horizontal mount versions are suitable for use on through hole PCBs.
Full Length Leads 
Cropped Leads 
SMD formed Leads 
Formed Leads for Horizontal mounting 
Formed Leads for Vertical Mounting
Features
5.0 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
 | Drawing of Cylindrical MagnetsDrawing of Rectangular Bar Magnets starFeaturesNdFeB High Energy. Nickel coated. Energized Continue reading Nov 18, 2020 |
Actuation Distances for UM-0018-M Reed Switches
 | For easy selection of AT band and Magnet for an application, we offer Actuation distances for the UM-0018-M Reed Switch in, Cropped, SMD, Continue reading Dec 2, 2020 |
Electrical
| Contact Form | A | |
| Contact Rating (max) | W/VA | 5.0 |
| Switching Current (max) | A | 0.35 |
| Carry Current (max) | A | 0.5 |
| DC Switching Voltage (max) | VDC | 100 |
| 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-M-(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-M-7-12 denotes 7-12 Operate Band (AT) with Full Length leads. UM-0018-M-15-18-S denotes 15-18 Operate Band (AT) with SMD formed leads.
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 swtch. The complete usage notes are available here.
Ampere Turn Selection
 | For any application, it is important to select the correct Ampere Turn (AT) or magnetic sensitivity of a Reed Switch, Reed Sensor or Continue reading Aug 27, 2020 |
Product Handling
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Manual Soldering
 | Soldering of Reed Switches and Reed Sensors requires some care to ensure that these delicate devices are not inadvertently damaged. Damage Continue reading Nov 10, 2020 |
Ferro-magnetic parts
 | 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. Continue reading Sep 4, 2019 |
Potting and Encapsulation
 | Epoxy dispensing Nozzle When potting or encapsulating reed switch assemblies in custom housings, selection of materials are important. Continue reading Sep 4, 2019 |
Reed Contact Protection Circuits
 | 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. Continue reading 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-M Ultra Miniature Reed Switch is known to perform well.
Reed Switches and Reed Sensors in Capsule Endoscopy
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Reed switches and Reed Sensors in Portable Defibrillators
 | Defibrillator Defibrillation is a treatment for life-threatening cardiac arrhythmia, or irregular heart beat. This condition is also Continue reading Nov 6, 2020 |
Reed sensors for detecting Ignition Key
 | 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 Continue reading Nov 7, 2020 |
Reed Sensors in Pediatric Feeding tubes
 | Pediatric Feeding Tube Pediatric Feeding tubes are used by nursing homes and hospitals on babies and young children, in an intensive Continue reading Nov 6, 2020 |
Reed Sensors in Electric Car Chargers
 | Electric Car Charging Station Electrical cars are designed to have a range of 250-300 kilometers on a full charge. To ensure that the Continue reading Nov 7, 2020 |
Reed switches in Lightsabers
 | 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, Continue reading Nov 7, 2020 |
Reed Switches and Reed sensors in Canal Hearing Aids
 | In-canal Hearing Aid As widely known, Hearing Aids are devices designed to improve hearing by making sound audible to a person with Continue reading Nov 6, 2020 |
Magnet sensors in Musical Greeting Cards
 | 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 Continue reading Nov 7, 2020 |
Reed sensors in Notebook computers and PC desktops
 | Notebook Computer Notebook computers and Netbooks are part of personal life. Screen time on these devices is anywhere between 2 and 6 Continue reading Nov 6, 2020 |
Reed switches and Reed sensors in Spirometers
 | Spirometer for Lung Function Testing A Lung function test or Pulmonary Function test, PFT for short, is a system to evaluate the Continue reading Nov 6, 2020 |
Reed switches in Vagus Nerve Stimulators
 | Vagus Nerve Stimulator The Vagus nerve in the neck is one of the primary communication lines to the brain. For patients with epilepsy Continue reading Nov 6, 2020 |
Reed switches and Reed sensors in Pacemakers
 | Pacemaker Artificial pacemakers are implantable devices that generate electrical impulses to the heart, to contract the muscles and Continue reading Nov 6, 2020 |