

The MR386 ZapFREE® Fiber Optic Microswitch paired with a MR380 series Controller provides a innovative signaling solution that can be deployed in challenging and hazardous environments over long distances. The switch sensor employs a photo interrupt scheme operating over a duplex multimode optical link that allows for reliable signal detection. This product provides the same mechanical attributes and form factor as ubiquitous electrical micro switches.
The MR386 Microswitch has a standard V-series form factory and is compatible with Omron and Honeywell microswitch accessories, including lever arms and roller arms. Below is MR386 microswitch with Omron VAL2 Roller Leaf Spring.

Specifications
Switching Characteristics | |
Durability | > 1,000,000 Operations minimum |
Actuation Force (typ.) | MRI: 1.49 N (150 gF) Industrial: 0.49 N (50 gF) |
Release Force (typ.) | MRI: 0.49 N (50 gF) Industrial: 0.13 N (13gF) |
Switching Hysteresis (typ.) | MRI: 0.25mm Industrial: 0.26mm |
Operating Frequency | 150 operations per minute max |
Optical Interface | |
Pigtail Configuration | LC Duplex Plug, Fiber type and pigtail per ordering coder |
Insertion Loss | For MR386-2x-YY; IL=3.5dB max (3.0dB typical), 62.5/125μm OM1 MM Fiber |
Maximum Distance | Distance depends on the user’s system loss budget which is the total round-trip loss of all optical link components. Consult Application Note AN118 for more information |
Environmental | |
Temperature/Humidity | Non-Metallic: -5°C to +60°C (-23°F to +140°F) Industrial Model: -40°C to +80°C (-40°F to +150°F) 15-90% RH, Non-Condensing |
MR Attributes | ACR Guidance Document for Safe MR Practices |
MRI Useage Zones | MRI Safe sensor is designed for safe use in all MR Zones I-V Both immune and invisible to the MRI electromagnetic field |
Materials | Non-metallic except for fiber optic connector end |
Explosive Atmospheres | Inherently Safe, Simple Mechanical Device |
EX Classification | Inherently safe, simple mechanical device when used with MR380 series Multimode Controller IECEx Test Report GB/CML/ExTR 16.0105.00/00 |
ATEX | EPL Mb/Gb/Gc/Db/Dc |
EAEU/GOST | EPL Mb/Gb/Gc/Db/Dc |
IECEx | EPL Mb/Gb/Gc/Db/Dc |
North America | Exempt, non-electrical |
Physical Attributes | |
Housing Dimension | V15 compatible, Consult Mechanical Reference Drawing |
Unit Weight | Sensor with 1.5 meter pigtail, 15 g (0.53 oz) |
Specifications subject to change without notice
Features
- Two models offered: Industrial and Non-Metallic MRI Safe
- Two switching options offered: Normally Open and Normally Closed
- Multimode 62.5/125
- Interchangeable with V15 series electrical micro switch
- Immune to EMI, RFI, lightning and ground loops
- Immune to high voltage lines
- Operates over long distances-up to 1.5km
- Ex classified inherently safe, simple mechanical device is approved for EPL Mb/Gb/Gc/Db/Dc applications
TO ORDER
Call +1-805-389-6600 or email sales@micronor.com
Ordering Information
MR386-XY-ZZ (MR Safe Version) |
MR Safe, Non Metallic FO Microswitch: where X=Fiber type: 2=OM1 62.5/125 MMF where Y=Optical Option: 0=NO, 4=NC where Z=Pigtail Length: 1R5=1.5m, 03=3m Contact Micronor sales for OEM custom pigtail lengths |
MR386-XY-ZZ (Industrial Version) |
Industrial Grade FO Microswitch: where X=Fiber type: 2=62.5/125 MMF where Y=Optical Option: 1=NO, 5=NC where Z=Pigtail Length: 1R5=1.5m, 03=3m Contact Micronor sales for OEM custom pigtail lengths |
MMF=Multimode Fiber
Quick Ship Configurations
MR386-24-1R5MR Safe Microswitch, NC, Pigtail=1.5mMR386-21-1R5Industrial Grade Microswitch, NO, Pigtail=1.5mMR386-25-1R5Industrial Grade Microswitch, NC, Pigtail=1.5m
MR380-0-1E | OEM Multimode Controller Board |
MR380-1-3 | Universal Single Mode/Multimode DIN Rail Mount E-Stop and Switch Controller Module |
MR386-20-1R5 | MR Safe Microswitch, NO, Pigtail=1.5m |
MR386-21-1R5 | Industrial Microswitch, NO, Pigtail=1.5m |