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.
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-H Reed Switches
 | 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 Continue reading 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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Product Handling
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Manual Soldering
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Ferro-magnetic parts
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Potting and Encapsulation
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Reed Contact Protection Circuits
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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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Reed switches in Lightsabers
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Magnet sensors in Musical Greeting Cards
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Reed sensors in Radio-controlled Gliders and model Airplanes
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Reed sensors in Accurate level sensing of fluids
 | 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 Continue reading Nov 7, 2020 |
Reed switches in Washing machine vibration detection
 | Washing Machine Reed Switches are used in bi-directional vibration sensors. These sensors are used in Washing machines to detect Continue reading Nov 6, 2020 |
Reed sensors in Electric Toothbrushes
 | Electric Toothbrush Electric toothbrushes are designed to make the brush head and bristles move in rapid motions, either in a 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 |
Miniature Reed sensors in activating Dentist’s Drill
 | Denstist's Drill A dental drill or hand-piece is a hand-held, mechanical instrument used to perform a variety of common dental Continue reading Nov 6, 2020 |