UM-0018-M Ultra Miniature Reed Switch
UM-0018-M with Full Length Leads 
UM-0018-M with Cropped Leads 
UM-0018-M with SMD formed Leads 
UM-0018-M for Horizontal mounting 
UM-0018-M 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.
Description
These highly sensitive, Form A type, Ultra miniature reed switches are designed for low power, high speed switching applications. The 5 mm glass version is built for use in very compact applications. 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. This Reed Switch can be molded with a 0.25 mm wall around the glass capsule for use in hazardous industrial environments to withstand higher shock and vibration. The cropped version is suitable for 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 mounting on through hole PCBs.
Standard Magnets
 | We offer a range of magnets in different sizes and shapes, specially selected to...Continue reading |
Actuation Distances for UM-0018-M Reed Switches
 | Actuation distances for UM-0018-M reed switches of cropped, SMD, Horizontal Mount and Vertical Mount...Continue reading |
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.
Usage Notes
Here are some of the recommended usage notes to ensure maximum durability of this product. The complete usage notes are available here.
Ampere Turn Selection
 | For any application, it is important to select the correct Ampere Turn (AT) or...Continue reading |
Product Handling
 | Reed Switches, Reed Sensor and Magnet Sensors are sensitive devices that easily develop micro...Continue reading |
Manual Soldering
 | Manual Soldering of reed switch leads may be required when using custom plastic housing...Continue reading |
Ferro-magnetic parts
 | Using Ferro-magnetic mounting parts or screws within a 100 mm vicinity of a reed switch will...Continue reading |
Potting and Encapsulation
 | As some potting compounds cure over 24 hours, the glass seals should be protected....Continue reading |
Reed Contact Protection Circuits
 | When a reed switch is to be connected to an inductive load or a...Continue reading |
Other Special Configurations
Lower Static Contact Resistance
Dynamic Contact Resistance Limit
Higher Insulation Resistance
Special Release Limits
Gold plated leads
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 reed switch is known to perform well.
Reed Switches and Reed Sensors in Capsule Endoscopy
 | Capsule Endoscopy is a new process to circumvent problems of regular endoscopy. It consists...Continue reading |
Reed switches and Reed Sensors in Portable Defibrillators
 | Defibrillator and impantable Cardioverter-defibrillators use reed sensors to alter the mode of operation using...Continue reading |
Reed sensors for detecting Ignition Key
 | As long as the ignition key detecting reed sensor is not actuated means that...Continue reading |
Reed Sensors in Pediatric Feeding tubes
 | To know the location of the end of a feeding tube, tiny reed switches...Continue reading |
Reed Sensors in Electric Car Chargers
 | Electrical cars are designed to have a range of 250-300 kilometers on a full...Continue reading |
Reed switches in Lightsabers
 | Reed Switches are used in Lightsabers to for power up only when the owner...Continue reading |
Reed Switches and Reed sensors in Canal Hearing Aids
 | A tiny reed sensor inside hearing aids help the user adjust volume levels and...Continue reading |
Magnet sensors in Musical Greeting Cards
 | Ultra miniature reed switches can be used in electronic greeting cards with magnets to...Continue reading |
Reed sensors in Notebook computers and PC desktops
 | In notebook computers the screen is closed to put the system into sleep mode....Continue reading |
Reed switches and Reed sensors in Spirometers
 | Reed Switches help measure the volume of air intake and the time in a...Continue reading |
Reed switches in Vagus Nerve Stimulators
 | Vagus Nerve stimulators are implantable devices which control the stimulation of impulses to control...Continue reading |
Reed switches and Reed sensors in Pacemakers
 | Mode changing in a pacemaker requires an external wand with an embedded magnet, with...Continue reading |