Our Line of Bi-Stable and Self-Restoring Rotary Solenoids

Capacity for Volume: Since we are vertically integrated, we have the ability to adjust production to accommodate prototype quantities to tens of thousands of units. Brandstrom is your one-stop rotary solenoid solution!

For standard off-the-shelf applications, Brandstrom manufactures a comprehensive line of bi-stable, self-restoring (momentary) and self-restoring 3 position solenoids. This product selector lets you view the Brandstrom product with the options you want.

Have questions about rotary solenoids?

Our team is ready to discuss.

Configure your rotary solenoid: Model: A1265-1

3 position
Low Outgas
Rotation Angle

45° 60° 90°

About Rotary Magnetic Solenoids

Rotary solenoids are devices which convert electrical energy into rotational mechanical energy. A magnetic field is created when electricity flows through a coil of wire (solenoid) inside the device. The orthogonal component of the magnetic field relative to the poles of an internal drive magnet is what creates the rotational force (torque) used to move the shaft of the device.

Miniature rotary solenoids can be used as rotary actuators for lightweight mechanical linkages.

Rotary Solenoid Configurations

All rotary solenoids manufactured by Brandstrom Instruments operate based on the principle of a spring-free, electromagnetic system. Mechanical and electrical operating parameters can differ depending upon application, but all rotary solenoids conform to one of the three configurations described below:

Bi-Stable Solenoid

Click & release the power button to test.

When the Bi-stable solenoid is energized with a pulse, the shutter rotates from the start position to the secondary position. It will remain magnetically latched in the secondary position until an opposite polarity pulse is applied, returning the shutter to its starting position


Self-Restoring Solenoid

Click & hold the power button to test.

The solenoid is magnetically latched in its home position until it is energized, then the shutter will rotate to the secondary position and remain there until power is removed, allowing it to return to the home position.


Self-Restoring 3 Position Solenoid

Click & hold the positive or negative power buttons to test.

The solenoid is magnetically balanced in a center position until it is energized; then the shutter rotates to position 2 and remains there until power is removed, returning the shutter to the center position. A reverse polarity pulse is applied to rotate the shutter in the opposite direction to position 3 where it will remain until power is removed, returning the shutter to the center position once again.

– power
+ power

Solenoid Q&A

What are the different types of optical shutters?

There are rotary drive, iris and guillotine shutters to name a few. Brandstrom Instruments is a manufacturer of rotary solenoid optical shutters.

What is the difference between mechanical and electronic shutter?

Mechanical shutters function by moving a shutter, vane or filter in front of the aperture or light source, like a laser beam. A electronic shutter relies on image information gathered from a sensor that gathers the data one line at a time.

How does a solenoid work?

A solenoid is a simple solid state motor relying on an internal coil to generate a magnetic field to change state.

What is a bistable solenoid?

A bistable solenoid refers to a 2-state solenoid that changes state from position 1 to position 2 when a 50-100ms pulse of positive power is applied. It then remains magnetically latched until a reverse (negative) 50-100ms pulse is applied to return it back from position 2 to position 1.

What is a momentary solenoid?

This is a rotary solenoid that changes state from position 1 to position 2 when power is applied and remains in the secondary position until power is removed to return back to position 1.

What is a rotary solenoid actuator?

A rotary solenoid actuator is an rotary solenoid but with an attachment other than a shutter meant to move another device in the system.

How do solenoid actuators work?

A solenoid actuator works on the same principle as all other solenoids, but with an attachment other than a shutter meant to perform work. See solenoids in action.