
Ledex® Industry-Leading Solenoids
For decades, Ledex® has been known as a leader in solenoid innovation, problem solving and product development. Johnson Electric's goal is to make you successful in a global market that is ever more demanding of new technologies and rapid advancements.
Marketed under the Ledex® Brand, Johnson Electric offers a diverse range of rotary and linear solenoids custom engineered for each application. These industry leading products include high speed, short stroke rotary solenoids such as the BTA® and Ultimag® series and long life, medium stroke linear solenoids including Open Frame, STA® Tubular and Low Profile product families.
The next time you need a solenoid solution think Johnson Electric and the Ledex® Brand.
Explore Recommended SolutionsApplications
Industrial Automation
Material Handling
Locking & Latching Mechanisms
Beverage Dispensing
Medical & Diagnostic Equipment
Automotive
Why Should I Use Solenoids?
Actuation for machine and process automation must range from the most basic on-off function to extremely complex sequencing. When the process involves linear or rotary motion, solenoids are among the best actuation devices in terms of size, cost, simplified installation and ease-of-use.
In keeping with recent industry trends, Johnson Electric has developed many solenoid designs to be especially advantageous for specific application demands including:
- Saving Energy with magnetic latching solenoids for power off engagement
- Quiet operation
- Miniature size for space-restricted applications
- Long-life designs for extremely consistent and dependable operation
- High speed designs for maximum throughput and productivity
Determining the Best Solenoid for Your Application
Whether your design includes linear or rotary actuation, Johnson Electric can help you determine the best solenoid to meet your application design requirements, such as:
- Exceptional Force/Torque
- A linear solenoid can provide up to 30 pounds of force from a unit less than 2-1/4 inches long. A rotary solenoid can provide well over 100 lb-in of torque from a unit also less than 2-1/4 inches long.
- Compact Size
- Need low profile? Minimum volume? Ledex solenoids can pack more work per cubic inch than motors. Many of our new miniature series units are in the 1/2 to 1” size.
- Simplified Control
- Being a pulsed device with minimal components optimizes solenoids for digital control. This results in faster cycling and higher reliability with fewer interfaces.
- Uncompromising Reliability
- Ledex solenoids provide repeatable, predictable performance with a specified life of up to 100 million cycles.
Learn More about Solenoids
Discover 3 Types of Solenoids

Tubular Solenoids
Tubular solenoids provide high force for short stroke applications and are ideal where long life and high reliability are needed.
Read White Paper: Understanding Pull vs Push Solenoids
Open Frame Solenoids
Box Frame and C Frame solenoids, available in AC and DC models, provide an economical solution for cost sensitive applications.

Rotary Solenoids
The Rotary Solenoid product line consists of the Rotary, BTA®, and Ultimag® solenoids; offering high torque, high speed, and long life.
Recommended Solenoid Products

Size 75 STA® Tubular Solenoid
The Size 75 - 3/4" X 1-1/2" STA series Tubular Solenoid is available in pull or push type and offer 25 million cycles life with no lubrication.
- Long Life to 25 million cycles
- Pull and Push Models
- Wide Range of DC Input Voltages

B14HD Box Frame Solenoid
The B14HD Box Frame solenoid is available in Pull and Push models in both standard and magnetic latching versions that offer up to 3 million cycles life.
- 3 Million cycles life
- Pull and Push Models
- Magnetic latching models
- Includes metric and imperial threaded mounting holes
