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Optical Power: 6 W
Aperture Size: 4.2 mm
Switching Speed: 3 ms
Optics: Broadband
Position Sensors
Optical Shutter
Compact Size
500 million cycles
Highest Reliability
OEM Requiring Speed

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The LSTF50-ZX model is currently only available for high volume OEM applications. This optical shutter is designed for use as a fast process shutter and quick reaction laser safety interlock. The inherent speed is achieved with minimum electrical power requirement. This model is used routinely in application that operates 24/7/365, accumulating millions of cycles. It is one of our highest reliability products. Controller choice affects switching speeds. The solid copper package efficiently manages thermal flow, delivering the heat to the mounting surfaces.

Compatible system controllers are CX4000B or user-built circuits designed around 24 VDC. Specification are for use with a typical 24 V capacitor discharge or PWM circuit.

Special considerations for this model are primarily thermal mounting. The Output Aperture face is the ideal surface for high heat loads, and the bottom threaded surface for lower heat loads.

Restricted use for this model include close proximity to high magnetic fields and strict observance of optical power rating. Environments subjecting shutter to large size particles could inhibit shutter motion.

See the Mechanical Drawing tab for dimensions. Also see the Application Notes in the Technical Information menu for important operational issues including: thermal mounting, user-built circuits, polarization, lifetime, jitter, vacuum operation, and contamination.




Aperture Diameter 4.2 mm
Typical Beam Diameter used for Specs 2.0 mm
Maximum Shutter Repetition Rate 30 Hz
CW and Quasi-CW Optical Power Handling 6 Watts
Delay to Begin Opening after Command Open 4 ms
Opening Time Switching Speed 3 ms
Delay to Begin Closing after Command Close 4 ms
Closing Time Switching Speed 6 ms
Thermal Power Dissipation Holding Open 4 W
Thermal Power Dissipation, Repetitive Cycling 6 W @ 30 Hz
Nominal Magnetic Winding Impedance 22 Ohms
Cable/Wire Type and Length 26 AWG, 2 ft max
Mounting Surface for Thermal Sinking Output Face
Position Sensors Yes
Weight 5 Oz.
Size (see mechanical drawing) 2.10 x 1.35 x 0.38 Inches


Aperture Size Range 2.3mm to 4mm
Wire Length 2 feet maximum
Wire Type Vinyl or Teflon
Connector Any 3 pin connector
Size 53.3mmx34.3mmx9.6mm (2.1”x1.35”x0.38”)
note: minimal size change can be designed
Identification Labels or engraving

Mechanical Drawing

Mechanical Drawing

Note: 3-D solid model available upon request (Solidworks or .stp file)

Electrical Drive

Electrical Drive Data

Classification Optical/Process Shutter
Number of Wire Leads, Std. 12 Wires, 26awg
Number of Wire Leads None
Cable or Wires – Length 2 feet maximum
Cable/Wire Termination 3-pin and 9-pin connectors
Recommended Controller and Voltage Present Capacitor Discharge 24 V, 24 V PWM, or our controllers
Shutter Winding Resistance 22 Ohms Nominal
Gravity Considerations None
Typical Minimum Hold Open Voltage, Room Temperature 10 V
Typical Hold Open Power Dissipation as Heat 4 W
User Power Supply Notes 24 V, 1A Rating
User Drive Circuit/Cap Discharge 24 V, C=330 mmF, R=25 ohm, use 1N4001 Flyback diode, and 15-36 V Zener
Nominal Winding Inductance 10 mH
User Drive Circuit/PWM Type 12 or 24 V for 50 ms, then drop to 5 V hold, 1N4001 Flyback BUILT-IN
Color Codes and Function of Wires Provided upon request